References of "Hornick, Jean-Luc"
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See detailPerformances of local poultry breed fed black soldier fly larvae reared on horse manure
Moula, Nassim ULiege; Scippo, Marie-Louise ULiege; Douny, Caroline ULiege et al

in Animal Nutrition (in press)

In poultry, feed based on maggots, like larvae of Black Soldier fly (Hermetia illucens) is an attractive option to substitute current ingredients which are expensive and often in direct or indirect ... [more ▼]

In poultry, feed based on maggots, like larvae of Black Soldier fly (Hermetia illucens) is an attractive option to substitute current ingredients which are expensive and often in direct or indirect competition with human food. Little information is currently available on the utility of these larvae in poultry feed, so goals of this study were to determine whether larvae could be reared on horse manure under traditional farming conditions and to evaluate the growth performances of a local poultry fed these larvae and the fatty acids profiles of their meat. After freezing and thawing, larvae were introduced in the feed of Ardennaise chickens between 30 and 80 days of age. Birds in the control group received a commercial standard feed while those in the treatment group received the same commercial feed in which 8% was substituted with whole fresh larvae corresponding to 2% on a dry matter basis. Mean ± standard errors of larval length and weight were 20.67 ± 2.21 mm and 0.14 ± 0.02 g, respectively. Mean larval percentages of dry matter and of substances extractable in diethyl ether were 24.6% and 23.1%, respectively. Larval fatty acids profiles were predominantly composed of lauric (28.1%) and palmitic (22.0%) acids. Least squares means of weekly weights of chicken, adjusted for the effects of sex, replication and initial weights, were significantly higher (P < 0.05) by 77.03 ± 53.37 g in larvae-fed than in control chickens. All the other measurements were not statistically different between larvae-fed and control chicken, including fatty acid profiles, protein content and ω6/ω3 ratio. In conclusion, the use of black soldier fly larvae in the diet of local chicken breed may be an alternative to the use of soy. [less ▲]

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See detailEffects of Pig Diets Containing By-product of Rice Distiller on Growth Performance, Carcass Characteristics and Meat Quality
Nguyen Cong, Oanh ULiege; Do Duc, Luc; Pham Kim, Dang et al

Scientific conference (2017, October 13)

The aim of this study was to evaluate the effects of fattening pig diets containing rice distiller’s by-product (RDP) on growth performance, carcass characteristics and meat quality. A total of 24 ... [more ▼]

The aim of this study was to evaluate the effects of fattening pig diets containing rice distiller’s by-product (RDP) on growth performance, carcass characteristics and meat quality. A total of 24 castrated male crossbred pigs ♂Duroc ×♀(Landrace × Yorkshire) were used for the experiment. Pigs were divided randomly by weight and litter into 3 diets, with 4 replications of 2 pigs in each pen. Pigs were fed one of 3 diets including DAR0 (control), DAR15 (15% RDP in dry matter) and DAR30 (30% RDP in dry matter) during 8 weeks. The results showed that the diets with RDP tended to affect average daily gain (P=0.09) and feed conversion ratio (P=0.08), while feed cost was decreased (P<0.001). Carcass traits was not significantly different between the diets, however back fat thickness was increased by RDP levels (P=0.03). Drip loss of Longissimus dorsi muscle at 24 and 48 hours was increased (P<0.05), whereas there were not effect on pH value and meat color at 45 min, 24 and 48 hours postmortem. Muscle lipid content was increased (P<0.01), whereas protein content was not influenced by RDP in diets. This suggests that using diet with 30% RDP for fattening pigs can improve lipid content of Longissimus dorsi muscle and reduce feed costs while not affecting growth performance and meat quality. [less ▲]

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See detailComparison of the effects of Opuntia ficus-indica powder on growth performance and serum parameters of the Broiler Chicken in Algeria
Moula, Nassim ULiege; Humbel, Maïlis ULiege; Leterrier, Mélanie ULiege et al

Poster (2017, October 13)

In Algeria, the ingredients used in the broiler feed are exclusively imported from abroad, which affects negatively the production cost of the chicken meat and its sale price in the market at national ... [more ▼]

In Algeria, the ingredients used in the broiler feed are exclusively imported from abroad, which affects negatively the production cost of the chicken meat and its sale price in the market at national level. Because of the wide diversity in soil and climate, Algeria has a substantial number of plants which can be used in animal feed. This work is part of the valuation of the feed potential of the barbaric fig tree, widely present in the Algerian rural landscape, for the broiler chicken. The Opuntia ficus-indica is known for its edible fruits and for use of its fleshy leaves or “racquets” as fodder especially during periods of drought. It is also used to control the water and wind erosion as well as for the protection and improvement of soil fertility in arid and semi-arid regions. The aim of this study was to measure the effects of Opuntia ficus-indica powder on growth performance, serum composition and carcass yield of broiler chickens. The experiments were performed in a private poultry farm in the Chemini region (Wilaya de Bejaia). In this study, 120 Ross-308 day-old male chicks were monitored. They were divided in 3 groups (Group 1, 2 and 3) according to the specific diet (4 x 10 chicks / group). The group 1 was offered commercial feed. The group 2 and group 3 were offered the same commercial feed as group 1 but 5% and 10% of the commercial feed was replaced by the Opuntia ficus-indica powder respectively. The Opuntia ficus-indica powder did not show any negative effect (p>0.05) on the final body-weight, average daily gain and carcass yield. However, it decreased (p<0.05) the biochemical parameters -blood concentration- (plasma glucose, uremia, cholesterol and triglycerides). In conclusion, the Opuntia ficus-indica powder has the potential to be used in poultry feed to reduce the cost of broiler feed in Algeria [less ▲]

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See detailThe effect of concentrate allocation on traffic and milk production of pasture based cows milked by an automatic milking system
Lessire, Françoise ULiege; Froidmont, Eric; Shortall, John et al

in Animal (2017), 11(4), 1-9

Increased economic, societal and environmental challenges facing agriculture are leading to a greater focus on effective way to combine grazing and automatic milking systems (AMS). One of the fundamental ... [more ▼]

Increased economic, societal and environmental challenges facing agriculture are leading to a greater focus on effective way to combine grazing and automatic milking systems (AMS). One of the fundamental aspects of robotic milking is cows’ traffic to the AMS. Numerous studies have identified feed provided, either as fresh grass or concentrate supplement, as the main incentive for cows to return to the robot. The aim of this study was to determine the effect of concentrate allocation on voluntary cow traffic from pasture to the robot during the grazing period, to highlight the interactions between grazed pasture and concentrate allocation in terms of substitution rate and the subsequent effect on average milk yield and composition. Thus, 29 grazing cows, milked by a mobile robot, were monitored for the grazing period (4 months). They were assigned to 2 groups: a low concentrate (LC) group (15 cows) and a high concentrate (HC) group (14 cows) receiving 2 kg and 4 kg concentrate per cow per day respectively. Two allocations per day of fresh pasture were provided at 0700h and 1600h. The cows had to go through the AMS to receive the fresh pasture allocation. The effect of concentrate level on robot visitation was calculated by summing milkings, refusals and failed milkings/cow per day. The impact on average daily milk yield and composition was also determined. The interaction between lactation number and month was used as an indicator of pasture availability. Concentrate allocation increased significantly robot visitations in HC (3.60 ± 0.07 visitations/cow per day in HC - 3.10 ± 0.07 visitations/cow per day in LC; P<0.001) while milkings/cow per day were similar in both groups (LC: 2.37 ± 0.02/day - HC: 2.39 ± 0.02/day; ns). The average daily milk yield over the grazing period was enhanced in HC (22.39 ± 0.22 kg/cow per day in HC- 21.33 ± 0.22 kg/cow per day in LC; P<0.001). However the gain in milk due to higher concentrate supply was limited with regards to the amount of provided concentrates. Milking frequency in HC primiparous compared with LC was increased. In the context of this study, considering high concentrate levels as an incentive for robot visitation might be questioned, as it had no impact on milking frequency and limited impact on average milk yield and composition. By contrast, increased concentrate supply could be targeted specifically to primiparous cows. [less ▲]

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See detailEvaluation of the ruminal function of Belgian dairy cows suspected of subacute ruminal acidosis.
Lessire, Françoise ULiege; Knapp, Emilie; Theron, Léonard et al

in Vlaams Diergeneeskundig tijdschrift (2017), 86(1), 16-23

Subacute ruminal acidosis (SARA) has been considered a major pathology in high producing dairy herds for years. These findings were corroborated by several studies in Europe. However, different feeding ... [more ▼]

Subacute ruminal acidosis (SARA) has been considered a major pathology in high producing dairy herds for years. These findings were corroborated by several studies in Europe. However, different feeding practices and herds’ production levels are found in Southern Belgium. This study aimed to ascertain whether dairy cows of several herds from the south of Belgium (Wallonia) with a suspicion of SARA really did present too low ruminal pH values. Twenty-four herds were visited and 172 cows were sampled using an oropharyngeal device to collect ruminal fluid, i.e. Geishauser probe. On the samples, three tests were performed: pH measurement, methylene blue reduction test and microscopic evaluation of protozoa vitality. Based on these analyses, no cows demonstrated pH values lower than 5.5 and, only ten cows could be considered at risk for SARA. By contrast, in eightteen cows, pH values higher than 7.0 were measured and ruminal inactivity was suspected. In this study, ruminal alkalosis appeared to be more frequently observed than SARA. [less ▲]

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See detailPerformances of local poultry breed fed black soldier fly larvae reared on horse manure
Moula, Nassim ULiege; Scippo, Marie-Louise ULiege; Douny, Caroline ULiege et al

in Animal Nutrition (2017)

In poultry, feed based on maggots, like larvae of black soldier fly (Hermetia illucens) is an attractive option to substitute current ingredients which are expensive and often in direct or indirect ... [more ▼]

In poultry, feed based on maggots, like larvae of black soldier fly (Hermetia illucens) is an attractive option to substitute current ingredients which are expensive and often in direct or indirect competition with human food. Little information is currently available on the utility of these larvae in poultry feed, so goals of this study were to determine whether larvae could be reared on horse manure under traditional farming conditions and to evaluate the growth performances of a local poultry fed these larvae and the fatty acids profiles of their meat. After freezing and thawing, larvae were introduced in the feed of Ardennaise chickens between 30 and 80 days of age. Birds in the control group received a commercial standard feed, while those in the treatment group received the same commercial feed in which 8% was substituted with whole fresh larvae corresponding to 2% on a dry matter basis. Means ± standard errors of larval length and weight were 20.67 ± 2.21 mm and 0.14 ± 0.02 g, respectively. Mean larval percentages of dry matter and of substances extractable in diethyl ether were 24.6% and 23.1%, respectively. Larval fatty acids profiles were predominantly composed of lauric acid (28.1%) and palmitic acid (22.0%). Least squares means of weekly weights of chicken, adjusted for the effects of sex, replication and initial weights, were significantly higher (P < 0.05) by 77.03 ± 53.37 g in larvae-fed than in control chickens. All other measurements were not statistically different between larvae-fed and control chicken, including fatty acid profiles, protein content and ω6/ω3 ratio. [less ▲]

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See detailRôles et caractéristiques morphologiques du ver de terre Eudrilus eugeniae
Byambas, Patrick; Lemtiri, Aboulkacem ULiege; Hornick, Jean-Luc ULiege et al

in Biotechnologie, Agronomie, Société et Environnement (2017), 21(2), 160--170

Introduction. Eudrilus eugeniae est un ver épigé d’origine africaine. Il est principalement rencontré dans les pays tropicaux et subtropicaux, et est utilisé dans les processus de lombriculture et de ... [more ▼]

Introduction. Eudrilus eugeniae est un ver épigé d’origine africaine. Il est principalement rencontré dans les pays tropicaux et subtropicaux, et est utilisé dans les processus de lombriculture et de lombricompostage. Littérature. Le développement de l’utilisation et de l’exploitation du ver nécessite un approfondissement des connaissances s’y rapportant pour optimiser la production des vers et du lombricompost. Cette synthèse bibliographique a été initiée pour faciliter la valorisation agronomique de l’espèce au Gabon et améliorer les connaissances actuelles sur E. eugeniae. Elle pourrait faciliter l’élaboration d’une clé d’identification spécifique à E. eugeniae, à l’instar de celles qui existent pour d’autres espèces. Conclusions. La synthèse des connaissances disponibles sur le ver de terre E. eugeniae devrait faciliter son exploitation et sa valorisation dans les pays comme le Gabon où l’étude de ce ver de terre est récente. [less ▲]

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See detailComparison of milk fatty acid profiles measured on Kouri cows near Lake Chad and on dairy cattle as reported by meta-analytical data
Bada Algom, Oumar; Fabry, Christophe ULiege; Leroy, Pascal ULiege et al

in Tropical Animal Health and Production (2017)

Kouri (Bos taurus) is a breed aboriginal from Lake Chad and threatened with extinction. This study aimed to compare milk fatty acid profiles measured on Kouri cows and on high-yielding dairy cattle in ... [more ▼]

Kouri (Bos taurus) is a breed aboriginal from Lake Chad and threatened with extinction. This study aimed to compare milk fatty acid profiles measured on Kouri cows and on high-yielding dairy cattle in Europe and elsewhere as reported by meta-analytical data (22 experimentations). Milk samples were collected from 14 Kouri dairy cows in dry season (March to June) and fatty acids (FA) were determined by gas chromatography. Overall, 32 FA have been identified. Kouri showed lower values (P < 0.001) in the sum of saturated FA (SFA, −10.9 pts), cis-9, cis-12 18:2 (−1.00 pt) (P < 0.01, higher values (P < 0.001) in the sum of monounsaturated FA (MUFA, +15.3 pts), C18:0) (+3.5 pts), cis-9, trans-11 C18:2-CLA (+1.00 pts), trans-11 18:1 (+1.4 pts) and (P < 0.01) in cis-9, C18:1 (+3.00 pts) acids. The differences between the milk FA profile of the Kouri cows and that obtained from meta-analytical data could be the possible consequence of the use of particular lake pastures by Kouri cows. [less ▲]

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See detailEffect of cow colostrum on the performance and survival rate of local newborn piglets in Benin Republic.
Agbokounou, Aristide Mahoutin; Ahounou, Gb Enangnon Serge; Youssao, Abdou Karim I. et al

in Tropical Animal Health and Production (2017), 49(2), 287--294

The effect of bovine colostrum, including its thermally labile compounds, on the survival and growth performance of local breed piglets reared by their mother, in Benin, was evaluated over a 49-day trial ... [more ▼]

The effect of bovine colostrum, including its thermally labile compounds, on the survival and growth performance of local breed piglets reared by their mother, in Benin, was evaluated over a 49-day trial. Three groups of 16 piglets, stemming from two primiparous sows belonging to a unique traditional farm, were respectively fed for the first 48 h of life with either bovine colostrum heated to 85 °C for 30 min, or thawed bovine colostrum, or colostrum from the mother. Thereafter, the animals that received bovine colostrum turned back to their mother. At day 21, almost all piglets from the group that received heated colostrum died. The highest total weight gain was obtained in the group that received thawed bovine colostrum (P ˂ 0.01), followed by the group left with the mother. Corresponding average daily gains (ADGs) were 56, 34 and 2 g/day, respectively (P ˂ 0.05). At the end of the trial, the treatment effect was highly significant on the survival of piglets (100% in the thawed colostrum group vs. 00 and 50%, respectively, in the heated colostrum group and in the group left with the mother). At day 49, numerically higher weight and ADGs were obtained in the group that received thawed cow colostrum. Thawed bovine colostrum improved the growth performance and piglet survival in the local pig breed in Benin, probably owing to thermally labile components. Bovine colostrum may be used in our farms in order to reduce pre-weaning mortality, improve the profitability of livestock farmers, and ensure survival of traditional farms. The use of bovine colostrum on farms could be facilitated by collaboration between pig farmers and bovine farmers. It could also be facilitated by the creation of a colostrum bank. [less ▲]

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See detailPalatability of nine fodders species used by guinea pigs (Cavia porcellus)
Kampemba, Florence Mujinga; Tshibangu, Innocent Muamba; Nyongombe, Nathan Utshudienyema et al

in Tropical Animal Health and Production (2017), 49(8), 1733--1739

Nine fodders commonly offered to the guinea pigs by the breeders in Lubumbashi (Democratic Republic of Congo) were compared for chemical composition and for both daily dry matter intake and palatability ... [more ▼]

Nine fodders commonly offered to the guinea pigs by the breeders in Lubumbashi (Democratic Republic of Congo) were compared for chemical composition and for both daily dry matter intake and palatability indices by using 13 three-month-old guinea pigs. Four different plant families were provided to each guinea pig, and each animal was exposed to all the experimental diets studied for 8 consecutive days. The fodder species were three grasses: Trypsacum laxum, Panicum maximum, and Pennisetum purpureum; three trees or bushes Moringa oleifera, Leucaena leucocephala, and Bauhinia variegata; and three flowering plants Bidens oligoflora, Bidens pilosa, and Commelina diffusa. Dry matter content varied from 14 to 44/100 g FM, and CP from 13 to 28/100 g DM. B. variegata and P. purpureum showed the lowest CP value and L. leucocephala the highest. The grasses and the Commelina had higher levels of hemicelluloses than the tree fodders, especially P. maximum (45/100 g DM). High levels of K were found in the grasses and Bidens, and high Ca in the tree fodders and Bidens. The guinea pigs preferred, in a descending order, P. purpureum (0.79), B. pilosa (0.78), C. diffusa (0.78), T. laxum (0.77), P. maximum (0.76), B. oligoflora (0.75), M. oleifera (0.45), L. leucocephala (0.37), and B. variegata (0.33). The DMI and the palatability index were strongly correlated to the ash (r = 0.82; p ˂ 0.05) and the potassium (r = 0.88; p ˂ 0.05) contents in fodders. [less ▲]

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See detailColostrum immune quality of local sow breed in Benin: Growth, survival and acquisition of passive immunity in new-born piglet
Agbokounou, Aristide Mahoutin; Bengaly, Zakaria; Karim, Issaka Youssao Abdou et al

in African Journal of Biotechnology (2017), 16(16), 842--851

The objective of this study was to evaluate husbandry practices of pregnant sows, immunoglobulin G (IgG) concentration in colostrum of sow from local breed of Benin, their transfer to litter and the ... [more ▼]

The objective of this study was to evaluate husbandry practices of pregnant sows, immunoglobulin G (IgG) concentration in colostrum of sow from local breed of Benin, their transfer to litter and the survival and growth of piglets until 42 days of age within traditional farms pig. Results showed that sows were raised according to traditional practices characterized by sustainable or precarious housing without any hygiene measures. They were fed with forages and by-products arising from traditional and industrial food-processing. Reproductive performance allowed by these farming practices remained weak. The litter size obtained was 5.5 piglets and was a feature of the small less prolific West African local pig. The observed number of piglets weaned at 42 days of age was 5 and the average mortality rate from birth to 42 days of life was 15%. The piglets were characterized by low average birth weight at 439 g, low average intra-litter weight gain at 24 h (38 g), body weight at 42 days of 2119 g, an Average Daily Gain (ADG) of 40 g/day and a Relative ADG (RADG) of 30 g/day.kg. The mortality was negatively associated (P < 0.05) with the birth weight and the weight gain at 24 h. The weight gain within 0-42 days was positively associated with the birth weight (r = 0.59; P < 0.001). The ADG from 0 to 42 days and from 1-42 days were positively correlated respectively with the birth weight (r = 0.55; P < 0.001) and the weight gain at 24 h (r = 0.41; P < 0.005). Despite weak growth performance of the piglets before weaning, the sows were characterized by adequate IgG concentration in the colostrum collected at 24 h after the onset of parturition (22 mg/ml). However, the serum IgG levels at 7 days of life of the piglets were low (2 mg/ml). Finally, the study demonstrated that sows from local breed produce colostrum with adequate IgG concentration. However, transfer of these antibodies to piglets was low. Feeding of sows with forages may be beneficial in improving the immunological quality of colostrum in local pig breed. Finally, both weight gain at 24 h and birth weight were important to predict survival and growth of suckling piglets. [less ▲]

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See detailPhysiologie de l’immunité colostrale chez les porcins et facteurs de variation du rendement et de la qualité immunitaire du colostrum de la truie
Agbokounou, Aristide Mahoutin; Ahounou, Gb Enangnon Serge; Karim, Issaka Youssao Abdou et al

in International Journal of Biological and Chemical Sciences (2017), 11(1), 420--443

Chez les porcins comme chez d’autres mammifères, le colostrum apporte des substances nutritives et des facteurs immunitaires pour compenser l’immunité non transmise avant la naissance et le déficit ... [more ▼]

Chez les porcins comme chez d’autres mammifères, le colostrum apporte des substances nutritives et des facteurs immunitaires pour compenser l’immunité non transmise avant la naissance et le déficit énergétique avec lequel naissent les porcelets. Le colostrum est alors un aliment déterminant dans la survie du porcelet pendant les premières heures de sa vie et par conséquent un facteur important de la productivité de la truie. Le mécanisme de sa synthèse et du transfert de l’immunité au nouveau-né est complexe et mérite d’être bien cerné en vue d’assurer la survie du porcelet. La présente revue a non seulement décrit les mécanismes de synthèse des composants immunitaires et de leur transfert au nouveau-né, mais a fait aussi l’état des lieux de récents travaux sur les facteurs influençant la quantité et la qualité immunitaire du colostrum chez la truie. L’accent a été alors mis sur la composition du colostrum, la synthèse des composés nutritifs et immunitaires (transfert des immunoglobulines du sang dans la glande mammaire et leur synthèse locale), le transfert des immunoglobulines et des cellules immunitaires au porcelet et les facteurs endogènes et exogènes influençant la quantité et la qualité immunitaire du colostrum de la truie. [less ▲]

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See detailDetermination of collagen content in Algerian camel meat
Sahraoui, Naima; Degand, Guy; Errahmani, Mohamed Brahim et al

in International Research Journal of Public and Environmental Health (2017), 4(3), 3640

Collagen is an important constituent when the physical properties of meat are considered. In view of the fact that factors affecting camel meat toughness are not fully understood and the possibility that ... [more ▼]

Collagen is an important constituent when the physical properties of meat are considered. In view of the fact that factors affecting camel meat toughness are not fully understood and the possibility that they could influence marketing of camel meat. A total of twenty-three camels (age range: 4 months-15 years) from both sexes and belonging to Sahraoui and Targui breeds were slaughtered following the normal abattoir procedures in Ouargla (Algeria). Samples of Longissimus dorsi muscle were collected and the collagen content was determined. Mean value was 2.20±0.27 % on fresh matter. A high value of the collagen content was recorded in animals more than 8 years old compared to adults animals from 0 to 4years old (p=0.024). The difference between the breeds was not significant (2.13 vs. 2.39 % in Sahraoui and Targui breeds, respectively). Females meat’s had significantly higher values than that of the males (4.77 vs. 1.82%). [less ▲]

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See detailEFFECTS OF FEEDING DIETS CONTAINING RICE DISTILLER’S BY-PRODUCT ON GROWTH PERFORMANCE, CARCASS CHARACTERISTICS AND MEAT QUALITY OF FATTENING PIGS
Cong, Oanh Nguyen; Do Duc, Luc; Kim, Dang Pham et al

in Proceedings International Conference on Animal production in Southeast Asia: Current status and Future (2017)

The aim of this study was to evaluate the effects of feeding diets containing rice distiller’s by-product (RDP) on growth performance, carcass characteristics, meat quality of fattening pigs. A total of ... [more ▼]

The aim of this study was to evaluate the effects of feeding diets containing rice distiller’s by-product (RDP) on growth performance, carcass characteristics, meat quality of fattening pigs. A total of 24 castrated male crossbred pigs Duroc × (Landrace × Yorkshire) were used for the experiment. Pigs were divided randomly by weight into 3 diets, with 4 replications of 2 pigs in each pen. Pigs were fed one of 3 diets including DAR0 (control), DAR15 (15% RDP) and DAR30 (30% RDP in dry matter) during 8 weeks. The results showed that diets with increasing RDP did not affected average daily gain (P=0.09) and feed conversion ratio (P=0.08), while feed cost was decreased (P<0.001). Carcass traits was not significantly different between diets (P>0.06), however back fat thickness was increased by RDP levels (P=0.03). Drip loss of Longissimus dorsi muscle at 24 and 48 hours were increased (P<0.05), whereas there were not effect on pH value and meat color at 45 min, 24and 48 hours postmortem. Lipids content was increased (P<0.01), whereas protein content was not influenced by RDP in diets. This suggests that the use the diet with 30% RDP for fattening pigs can improve lipids content of Longissimus dorsi muscle and reduce feed costs while not affecting growth performance and meat quality. [less ▲]

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See detailEffects of defatting combined or not to heating of Jatropha curcas kernel meal on feed intake and growth performance in broiler chickens and chicks in Senegal
Nesseim, Thierry ULiege; Dieng, Abdoulaye; Mergeai, Guy ULiege et al

in Tropicultura (2017), 35(3), 149-157

Jatropha curcas is a tropical drought-resistant plant belonging to the Euphorbiaceae family that has gained importance for the production of biodiesel. The kernel of the seed contains approximately 55 ... [more ▼]

Jatropha curcas is a tropical drought-resistant plant belonging to the Euphorbiaceae family that has gained importance for the production of biodiesel. The kernel of the seed contains approximately 55% lipid in dry matter and the meal obtained could be an exceptional source of protein for family poultry farming, after treatments to remove toxic and anti-nutritional compounds. The ingestion and the growth performance of J. curcas kernel meal (JKM), obtained after partial physico chemical de-oiling combined or not with heating was evaluated in broiler chickens and chicks. Sixty unsexed broiler chickens, 30 day-old, divided into three groups as well as twenty broiler chicks, 1 day-old, divided into two groups were obtained for two experiments. In experiment 1, jatropha kernel was de-oiled and incorporated into a control fattening feed at 40 and 80g/kg (diets 4JKM1 and 8JM1). In experiment 2, jatropha kernel meal obtained in experiment 1 was heat treated and incorporated into a growing diet at 80g/kg (diet 8JKM2). Daily dietary intakes as well as weight gain of the animals were affected by the incorporation of jatropha kernel meal in the ration. In experiment 1, average daily feed intake (ADFI1) of 139.2, 55.2 and 23.4g/day/animal and also average daily weight gain (ADWG1) of 61.9, 18.5 and -7.7g/animal were obtained respectively for the groups fed with diets 0JKM1, 4JKM1 and 8JKM1. In experiment 2, Average daily feed intake (ADFI2) of 18.7 and 3.1g/day/animal and also average daily weight gain (ADWG2) of 7.1 and 1.9g/animal were obtained respectively for the groups fed with diets 0JKM2 and 8JKM2. In both experiment, feed conversion ratio (FCR) was also affected by the dietary treatments and the overall mortality rate showed an increase according to levels of jatropha kernel meal in diet. Keywords: broiler chickens, broiler chicks, Jatropha curcas, ingestion, growth performance [less ▲]

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See detailGoat grazing in northern Morocco: problem or solution?
Chebli, Youssef ULiege; Chentouf, Mouad; Hornick, Jean-Luc ULiege et al

in Proceedings of the 4th FARAH-Day (2017)

In northern Morocco, silvopastoral areas are characterized by pastoral activities, and the goats find some or all their feed rations. Overgrazing is listed as a main factor of silvopastoral degradation by ... [more ▼]

In northern Morocco, silvopastoral areas are characterized by pastoral activities, and the goats find some or all their feed rations. Overgrazing is listed as a main factor of silvopastoral degradation by local authority and several authors. Goat cannot only be regarded as a problem for silvopastoral ecosystems. A survey, with local population and local authority, were conducted in several rural communes of northern Morocco, to understand the actual factors of silvopastoral degradation. According to all interviewed persons: agriculture development, authority policy, cannabis cultivation, deforestation, drought, fire, overgrazing, population growth and soil erosion are the most cited drivers of silvopastoral degradation. Local population and local authority have the same perception that soil erosion, drought, fire and population growth are factors of silvopastoral degradation. Goat grazing can be considerate as a solution and not just a problem. In some forest areas, goat grazing contributes to a reduction of burned areas by elimination of inflammable shrubs. Herd mobility, as an ecological rationality, is considered as a response to unexpected variability in pasture production and/or animal nutritional needs. Despite all forms of degradation, silvopastoral areas in northern Morocco continue to play a support of all livestock activities, considered an inevitable source of goats feeding. [less ▲]

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See detailEffect of the method and the period of oil extraction on in vitro digestibility of olive cake in northern of Morocco
El Otmani, Samira ULiege; Ayadi, Mohamed; Chentouf, Mouad et al

in Proceedings of the 4th FARAH-Day (2017)

In Northern Morocco, goat population is the most dominant livestock. His feeding is based on forest rangelands and characterized by strong seasonal variability responsible of low productivity. Therefore ... [more ▼]

In Northern Morocco, goat population is the most dominant livestock. His feeding is based on forest rangelands and characterized by strong seasonal variability responsible of low productivity. Therefore, it is necessary to diversify and improve its diet. Olive cake is an oil extraction by-product that is widely available and can be a ruminant feed. Olive cake is produced by three methods and for limited period. This work aims to determine the effect of oil extraction method and period on digestibility of olive cake. Twenty-seven samples were collected from 3 mills by each extraction method (mechanical pressure, centrifugation 2 and 3 phases) during three periods (November, December and January). In vitro digestibility was performed using gas production method of (Menke et al., 1979) improved by Menke and Steingass (1988). Samples were incubated in glass syringes that contained rumen fluid and incubation solution that conserved in water bath in 39°C during 72 hours. Gas production was recorded after 2, 4, 8, 12, 24, 48 and 72 hours. Studied digestibility parameters were dry and organic matter digestibility, microbial biomass production, partitioning factor and volatile fatty acid. Extraction method affected digestion kinetics and the digestibility parameters except partition factor and volatile fatty acids. Olive cake obtained by 2 phases method had the highest digestibility. For extraction period, gas production decreased significantly per period. Period had no effect on digestibility parameters except for volatile fatty acids. Two phases olive cake is most suitable for feed but has a reduced shelf life, which requires the development of a suitable conservation mode. [less ▲]

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See detailExtensive goat production systems in northern Morocco: production and use of pastoral resources
Chebli, Youssef ULiege; Chentouf, Mouad; Hornick, Jean-Luc ULiege et al

in Porqueddu, C; Franca, A; Lombardi, G (Eds.) et al Grassland resources for extensive farming systems in marginal lands: major drivers and future scenarios (2017)

Grazing is a Mediterranean tradition with an unvaried importance in northern Morocco. Rangeland has known profound changes, inducing a major gap between pastoral supply and demand. This study aimed to ... [more ▼]

Grazing is a Mediterranean tradition with an unvaried importance in northern Morocco. Rangeland has known profound changes, inducing a major gap between pastoral supply and demand. This study aimed to assess pastoral production of pastures at two sites in northern Morocco (Derdara and Loubar) and investigate their use by goats. Concerning biomass production, we used the method of the reference module. The surveys were realized during the biomass evaluation period. Pastoral species, mainly Arbutus unedo, Cistus monspeliensis, Erica arborea, Lavandula stoechas and Pistacia lentiscus, represent the most palatable species selected by goats. Grazing is practised throughout the year except during rainy days when breeders practice ‘cut and carry’ of the branches. The biomass produced was estimated at 1,455 and 333 kg dry matter ha‑1, respectively, in Derdara and Loubar. Significant differences were observed depending on the season and according to sampling sites. Furthermore, the research showed the appearance of degraded areas dominated by annual species together with species of low pastoral interest – thorny plant species that characterize degraded areas. Due to climate changes and overgrazing, pastoral resources will have availability and quality reduced. The reasonable use of pastures, including a reduction in grazing pressure, should be developed to insure their sustainability. [less ▲]

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See detailUtilisation of Rice Distiller’s By-product for swine Production in Northern Vietnam
Nguyen Cong, Oanh ULiege; Dang, Pham Kim; Luc, Do Duc et al

Scientific conference (2016, December 08)

The objective of this study was to investigate the production of rice distiller’s by-product and its use as feed for pigs in three provinces (Hai Duong, Hung Yen and Bac Giang) of Northern Vietnam to ... [more ▼]

The objective of this study was to investigate the production of rice distiller’s by-product and its use as feed for pigs in three provinces (Hai Duong, Hung Yen and Bac Giang) of Northern Vietnam to identify annual supply resource of the by-product as pig feed. A total of 120 rice alcohol producers classified by production scales (large, medium and small) were interviewed from January to August 2015. Additionally, sixty-three rice distiller’s by-product samples were collected from investigated areas to determine nutrition components and to evaluate the effect of storage time (from the first to the seventh day) on quality of rice distiller’s by-product. Annual rice distiller’s by-product production was 4.8, 3.0 and 2.1 tons per household for large, medium and small scales respectively (P<0.001). The dominance of swine quantity in large-scale alcohol producing households in comparison with smaller number of pigs raised in medium and small ones (P<0.05) proved a clear relation between number of pigs in household and alcohol production scales. The amount of by-product used in daily diet of sows in all three scales gradually reduced from pregnant to lactating sows. The utilisation of by-product for fattening pigs was significantly diversified among different scales (33.6%, 29.3% and 25.3% for large, medium and small scales respectively) (P<0.05). The rice distiller’s by-product was a rich source of crude protein (26.2%), neutral detergent fiber (33.7%), lactic acid (2.27 %) and gross energy (20.41 MJ/kg DM). Furthermore, its nutritive values were stable under ambient condition during a week (P>0.05). [less ▲]

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