动物营养学报2016，Vol.28Issue(8)：2404-2413,10.DOI:10.3969/j.issn.1006-267x.2016.08.011
冷季补饲对藏羊消化道消化酶活性及表观消化率的影响
Effects of Supplementation on Digestive Enzyme Activities in Digestive Tract and Apparent Digestibility of Tibetan Sheep in Cold Season
摘要
Abstract
The aim of this study was to test the effects of urea⁃molasses lick block and concentrate supplemen⁃tation on growth performance, digestive enzyme activities in digestive tract and apparent digestibility of Tibetan sheep in cold season. Eighteen Tibetan sheep ewes were selected and randomly assigned in 3 groups. Control ( CON) group was provided with oat hay ad libitum, lick block supplementation ( BS) group was provided with oat hay ad libitum and supplemented with urea⁃molasses lick block ad libitum, and concentrate supplemen⁃tation (CS) group was provided with oat hay ad libitum and concentrate at 200 g/(ewe·d). After 60 d of feeding trial, 4 d of digestive trial was carried out, and finally all ewes were slaughtered. The results showed as follows:1) CS and BS groups ingested 29. 67% and 11. 37% more digestive energy, 40. 00% and 20. 00%more crude protein compared with CON group ( P<0. 05); 2) average daily gain ( ADG) of CS and BS groups were 3.22 and 1.98 times as much as that of CON group ( P<0.05);3) the concentrations of glucose, total cholesterol, triglycerides, total protein, globulin and albumin in serum were significantly increased in both of CS and BS groups compared with CON group ( P<0.05);4) the apparent digestibility of dry matter, neu⁃tral detergent fiber and acid detergent fiber was significantly enhanced in both of CS and BS groups compared with CON group ( P<0.05) , and CS group was significantly higher than BS group( P<0.05);5) the activities of the xylanase, proteinase and aminopeptidase in rumen fluid were significantly increased by nutritional sup⁃plementations (P<0.05), and CS group was significantly higher than BS group (P<0.05); the activities of alpha⁃amylase and trypsase were improved in CS group compared with CON group ( P<0.05) . It is concluded that the intakes of energy, protein and trace elements of Tibetan sheep can be significantly increased by urea⁃molasses lick block or concentrate supplementation in cold season, which also can significantly increase diges⁃tive enzyme activities, and finally improve the apparent digestibility and growth performance;under the condi⁃tions of the present study, the more energy and protein intakes by nutritional supplementation are, the better growth performance in Tibetan sheep appears.关键词
藏羊/营养补充方式/消化酶活性/表观消化率/生长性能Key words
Tibetan sheep/nutrition supplement way/digestive enzyme activity/apparent digestibility/growth performance分类
农业科技引用本文复制引用
景小平,赵索南,孔祥颖,周玉青,王之盛,彭全辉,邹华围,胡瑞,李倩,周婷,蒲启建,张灿..冷季补饲对藏羊消化道消化酶活性及表观消化率的影响[J].动物营养学报,2016,28(8):2404-2413,10.基金项目
青藏高原社区畜牧业行业科技项目 （）
