动物营养学报2017，Vol.29Issue(10)：3666-3675,10.DOI:10.3969/j.issn.1006-267x.2017.10.029
饲粮添加木薯渣对羔羊生长性能、血清指标及瘤胃发酵指标的影响
Effects of Dietary Cassava Residue Supplementation on Growth Performance, Serum Indexes and Rumen Fermentation Indexes of Growing Lambs
摘要
Abstract
This experiment was conducted to investigate the effects of dietary cassava residues ( CR) supple?mentation at different proportions on growth performance, nutrient apparent digestibility, serum indices and ru?men fermentation indexes of growing lambs. Ninety?six healthy Hu lambs of 3 to 4 months of age with similar body weight were randomly allocated into 4 groups with 6 replicates in each group and 4 lambs in each repli?cate. Lambs were fed with diets contained 0 ( control) , 5%, 10%, and 20% CR, respectively. The adjustment period lasted for 10 days and the experimental period lasted for 45 days. The results showed as follows:1) fi?nal body weight, average daily feed intake and apparent digestibility were not significantly different among groups ( P>0.05) . Average daily gain and ratio of feed to gain were linearly increased and decreased, respec?tively, with the increase of CR supplementation proportion ( P<0.05) . 2) With the increase of CR supplemen?tation proportion, serum total antioxidant capacity ( T?AOC) showed a quadratic change of firstly decreased and then increased ( P=0.007) , and control group was the highest; serum glutathione reductase ( GSH) con?tent showed a quadratic change of firstly increased and then decreased ( P=0.001) , and 10% group was signif?icantly higher than the other groups (P<0.05); serum superoxide dismutase (SOD) was linearly decreased ( P=0.010) . 3) With the increase of CR supplemental proportion, serum contents of total protein ( TP) and albumin ( Alb) changed linearly and quadratically ( P<0.05);serum albumin/globulin ( A/G) , aspartate ami?notransferase (AST) activity, and contents of globulin (Glb) and triglyceride (TG) changed quadratically (P<0.05); serumuric acid (UA) and creatinine (Crea) contents changed linearly(P<0.05); serum alanine aminotransferase ( ALT) activity and glucose content were not significantly different among groups ( P<0.05) . 4) Rumen fluid pH, concentrations of acetic acid, propionic acid, butyric acid, isovaleric acid and valeric acid, and acetic acid/propionic acid were not significantly different among groups( P>0.05) . Therefore, dieta?ry supplementation of CR can improve growth performance of growing lambs. But it may damage antioxidant capacity and kidney function with the high supplemental proportion of CR. It is suggested that the supplemental proportion of CR in diet of lambs should be less than 20%.关键词
木薯渣/羔羊/生长性能/表观消化率/血清指标/瘤胃发酵Key words
cassava residue/lamb/growth performance/apparent digestibility/serum index/rumen fermen⁃tation分类
农业科技引用本文复制引用
吕小康,王杰,王世琴,崔凯,刁其玉,张乃锋..饲粮添加木薯渣对羔羊生长性能、血清指标及瘤胃发酵指标的影响[J].动物营养学报,2017,29(10):3666-3675,10.基金项目
国家公益性行业(农业)科研专项(201303143) （农业）
国家肉羊产业技术体系建设专项(CARS?39) （CARS?39）
