title: Digestibility of solvent-treated Jatropha curcas kernel by broiler chickens in Senegal.
abstract: Jatropha curcas is a drought-resistant shrub belonging to the Euphorbiaceae family. The kernel contains approximately 60 % lipid in dry matter, and the meal obtained after oil extraction could be an exceptional source of protein for family poultry farming, in the absence of curcin and, especially, some diterpene derivatives phorbol esters that are partially lipophilic. The nutrient digestibility of J. curcas kernel meal (JKM), obtained after partial physicochemical deoiling was thus evaluated in broiler chickens. Twenty broiler chickens, 6 weeks old, were maintained in individual metabolic cages and divided into four groups of five animals, according to a 4 × 4 Latin square design where deoiled JKM was incorporated into grinded corn at 0, 4, 8, and 12 % levels (diets 0, 4, 8, and 12 J), allowing measurement of nutrient digestibility by the differential method. The dry matter (DM) and organic matter (OM) digestibility of diets was affected to a low extent by JKM (85 and 86 % in 0 J and 81 % in 12 J, respectively) in such a way that DM and OM digestibility of JKM was estimated to be close to 50 %. The ether extract (EE) digestibility of JKM remained high, at about 90 %, while crude protein (CP) and crude fiber (CF) digestibility were largely impacted by JKM, with values closed to 40 % at the highest levels of incorporation. J. curcas kernel presents various nutrient digestibilities but has adverse effects on CP and CF digestibility of the diet. The effects of an additional heat or biological treatment on JKM remain to be assessed.
authors.affiliation: Ecole Nationale Supérieure d'Agriculture, Département des Productions Animales, Université de Thiès, Km 3 route de Khombole BP A 296, Thiès, Sénégal. tnesseim@univ-thies.sn.|Faculté de Médecine Vétérinaire, Département de Productions Animales, Université de Liège, 20 Boulevard de Colonster, 4000, Liège, Belgique. tnesseim@univ-thies.sn.
authors.forename: Thierry Daniel Tamsir
authors.initials: TD
authors.lastname: Nesseim
authors.affiliation: Ecole Nationale Supérieure d'Agriculture, Département des Productions Animales, Université de Thiès, Km 3 route de Khombole BP A 296, Thiès, Sénégal. diengab@refer.sn.
authors.forename: Abdoulaye
authors.initials: A
authors.lastname: Dieng
authors.affiliation: Gembloux Agro-Bio Tech, Département Phytotechnie Tropicale et Horticulture, Université de Liège, 2 Passage des déportés, 5030, Gembloux, Belgique. gmergeai@ulg.ac.be.
authors.forename: Guy
authors.initials: G
authors.lastname: Mergeai
authors.affiliation: Ecole Nationale Supérieure d'Agriculture, Département des Productions Végétales, Université de Thiès, Km 3 route de Khombole BP A 296, Thiès, Sénégal. saliou.ndiaye@univ-thies.sn.
authors.forename: Saliou
authors.initials: S
authors.lastname: Ndiaye
authors.affiliation: Faculté de Médecine Vétérinaire, Département de Productions Animales, Université de Liège, 20 Boulevard de Colonster, 4000, Liège, Belgique. jlhornick@ulg.ac.be.
authors.forename: Jean-Luc
authors.initials: JL
authors.lastname: Hornick
mesh_terms: D000821:Animal Feed / Q000032:analysis*; D000822:Animal Husbandry; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D002645:Chickens; D004032:Diet / Q000662:veterinary; D031286:Jatropha; D010703:Phorbol Esters / Q000737:chemistry; D012675:Senegal; D012997:Solvents / Q000737:chemistry*; D013696:Temperature
chemical_list: D010703:Phorbol Esters; D012997:Solvents
keywords: Broiler chickens; Digestibility; Jatropha curcas