title: Nutritional value, performance, carcass quality, visceral organ size, and blood clinical chemistry of broiler chicks fed 30% tannin-free fava bean diets.
abstract: Two experiments were conducted to evaluate the chemical and nutritional values of 5 tannin-free fava bean (FB) cultivars (FB9, FB10, FB13, FB17, and FB24) on growth, visceral organ size, and blood clinical chemistry of broiler chicks fed a corn-soybean meal 48 (SBM48) diet containing 30% tannin-free FB. In the first experiment, 49 Hy-line roosters, 55 wk of age, were individually precision-fed 30 g of each FB cultivar and soybean meal 44 (SBM44). Protein, methionine, and lysine contents of the FB seeds (0.005% tannin) were 27.7, 0.23, and 1.98% of DM, respectively. The AMEn of all FB cultivars was 2,839 kcal/kg and higher (P < 0.05) than SBM44. The true lysine digestibility of FB10 (94.1) was higher (P < 0.05) than FB9 (89.0%) and FB24 (89.2%), but comparable with the other fava beans. The FB cultivar's true methionine digestibilities were similar among each other and to SBM44. In a battery feeding trial, 6 corn-SBM48 diets containing 0 (control) or 30% of FB9, FB10, FB13, FB17, or FB24 seeds were each fed to Ross 308 1-wk-old male broiler chicks for 14 d. The determined FB nutrient values were used in formulating FB-containing diets. Birds fed FB-containing diets had better (P < 0.05) weight gain and feed conversion than those of the control. When compared with the control birds, relative weights of abdominal fat pad and liver were reduced (P < 0.05) by 30% inclusion of all dietary FB varieties, except for FB17 and FB13, respectively. Broiler chicks fed the FB13 diet had plasma thrombocyte and white blood cell (WBC) differential counts higher (P < 0.05) than those fed the FB10 diet and WBC count higher (P < 0.05) than the birds fed the FB17 diet. In conclusion, tannin-free FB was lower in protein, methionine, and lysine, but higher in AMEn, compared with SBM44. Moreover, FB seeds, especially FB10, can be included in a broiler chick diet with no adverse effects on performance, but FB13 increased WBC count.
authors.affiliation: Animal Production Department, Lebanese University, Dekwaneh, Lebanon.
authors.forename: N N
authors.initials: NN
authors.lastname: Usayran
authors.affiliation: Faculty of Agricultural and Food Sciences, American University of Beirut, Beirut, Lebanon.
authors.forename: H
authors.initials: H
authors.lastname: Sha'ar
authors.affiliation: Poultry Science Department, Lebanese Agricultural Research Institute, Tel Amara, Lebanon.
authors.forename: G W
authors.initials: GW
authors.lastname: Barbour
authors.affiliation: Faculty of Agricultural and Food Sciences, American University of Beirut, Beirut, Lebanon.
authors.forename: S K
authors.initials: SK
authors.lastname: Yau
authors.affiliation: International Center for Agricultural Research in the Dry Areas, Ibn Tabib-Giza, Cairo, Egypt.
authors.forename: F
authors.initials: F
authors.lastname: Maalouf
authors.affiliation: Faculty of Agricultural and Food Sciences, American University of Beirut, Beirut, Lebanon mf02@aub.edu.lb.
authors.forename: M T
authors.initials: MT
authors.lastname: Farran
mesh_terms: D000821:Animal Feed / Q000592:standards; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D001774:Blood Chemical Analysis / Q000662:veterinary; D002645:Chickens / Q000097:blood / Q000254:growth & development*; D004032:Diet / Q000662:veterinary*; D004063:Digestion / Q000187:drug effects*; D006403:Hematologic Tests / Q000662:veterinary; D008297:Male; D009929:Organ Size; D013634:Tannins / Q000032:analysis; D031307:Vicia faba / Q000737:chemistry* / Q000378:metabolism*
chemical_list: D013634:Tannins
keywords: amino acid digestibility; broiler chick; metabolizable energy; performance; tannin-free fava bean