动物营养学报Issue(2)：397-403,7.DOI:10.3969/j.issn.1006-267x.2014.02.015
饲粮谷氨酰胺添加水平对生长獭兔生长性能、氮代谢和空肠黏膜酶活性的影响
Effects of Dietary Glutamine Supplemental Level on Growth Performance, Nitrogen Metabolism and Jejunum Mucosal Enzyme Activities of Growing Rex Rabbits
摘要
Abstract
This experiment was conducted to study the effects of dietary glutamine supplemental level on growth performance, nitrogen metabolism and jejunum mucosal enzyme activities of growing Rex rabbits.Two hundred weaned Rex rabbits were randomly assigned to 5 groups with 40 replicates in each group and each rep-licate contained 1 rabbit.Rabbits in 5 groups were fed experimental diets supplemented with 0, 0.3%, 0.6%, 0.9%and 1.2%glutamine, respectively.The experiment lasted for 7 days for adaptation and 60 days for test.The results showed as follows: under the condition of no significant difference in initial body weight (P>0.05), dietary glutamine supplemental level did not significantly affect average daily intake (ADI), av-erage daily gain (ADG) and feed/gain (F/G) of growing Rex rabbits (P>0.05).With the increase of diet-ary glutamine supplemental level, the average daily gain ( ADG) tended to be increased firstly and then de-creased, while the feed/gain ( F/G) showed the opposite tend, and the highest ADG and the lowest F/G both appeared in 0.9%glutamine group.Dietary glutamine supplemental level had significant effects on fecal nitro-gen (P=0.004 8), digestible nitrogen (P=0.008 1), retention nitrogen (P=0.005 3), nitrogen apparent digestibility (P =0.000 9), nitrogen utilization rate (P =0.008 1) and nitrogen biological value (P =0 .002 3 ) , but had no significant effects on urine nitrogen and nitrogen intake of growing Rex rabbits ( P>0 .05 ) .The values of the lowest fecal nitrogen and the highest digestible nitrogen, retention nitrogen, nitrogen apparent digestibility, nitrogen utilization rate and nitrogen biological value appeared in 0 .9% glutamine group.Dietary glutamine supplemental level had a significant effect on the apparent digestibility of methionine (P=0.001 0), cystine (P=0.006 3), glutamic acid (P=0.010 6) and proline (P=0.000 1), but had no significant effect on the apparent digestibility of other amino acids of growing Rex rabbits ( P>0 .05 ) .Di-etary glutamine supplemental level had significant effects on the activities of maltase (P=0.010 8), ornithine transaminase ( P=0.002 9) and glutamate synthase ( P=0.007 6) in jejunal mucosa, but had no significant effects on the activities of sucrase and lactase in jejunal mucosa of growing Rex rabbits (P>0.05).Consider-ing all indices of this experiment, the appropriate glutamine supplemental level in the diet of growing Rex rab-bits is 0 .9%.关键词
谷氨酰胺/生长獭兔/生长性能/氮代谢/空肠黏膜酶活性Key words
glutamine/growing Rex rabbit/growth performance/nitrogen metabolism/jejunal mucosal en-zyme activities分类
农业科技引用本文复制引用
付朝晖,李福昌,李冰,张彩霞,李万佳,朱晓强..饲粮谷氨酰胺添加水平对生长獭兔生长性能、氮代谢和空肠黏膜酶活性的影响[J].动物营养学报,2014,(2):397-403,7.基金项目
现代农业产业技术体系建设专项（CARS-44-B-1）；国家公益性行业（农业）科研专项 （）
