作　　者： ; ; ; ; ;

机构地区： 韶关大学

出　　处： 《浙江大学学报（农业与生命科学版）》 2011年第2期203-211,共9页

摘　　要： 将144羽14日龄岭南黄肉鸡随机分成4组（每组6个重复，每个重复6羽），在各组基础日粮中分别添加0（CK）、0．2%、0．4％和0．6％的谷氨酰胺（glutamine，Gln），饲养试验分为14～28、29～42日龄2个阶段，测定其生长性能与养分利用率，并于42日龄进行屠宰，取样分析消化器官的发育情况．结果表明：与对照组相比，岭南黄肉鸡日粮中添加0．2％Gln显著提高十二指肠黏膜厚度（P〈0．05），对其他试验指标无显著影响（P〉0．05）；添加0．4％Gln极显著提高肉鸡十二指肠绒毛高度、黏膜厚度与空肠绒毛高度（P＜0．01），显著降低十二指肠、空肠隐窝深度与增加空肠黏膜厚度（P〈0．05），在14～28日龄极显著提高平均日采食量与平均日增质量（P〈0．01），显著降低料质量比（P＜0．05），显著提高干物质与粗蛋白利用率（P＜0．05），29～42日龄显著提高粗纤维利用率（P〈0．05）；添加0．6％GIn显著降低肌胃指数（P＜0．05），在14～28日龄显著提高平均日增质量（P〈0．05），29～42日龄显著增加平均日采食量、平均日增质量与干物质利用率（P％0．05），并显著下调料质量比（P＜0．05）．由此可知，在岭南黄肉鸡日粮中适量添加Gln能促进消化器官发育，并提高养分利用率与生长性能，尤以0．4％Gln的添加效果最为理想． The effects of dietary glutamine （Gin） supplementation on growth performance, nutrient utilization efficiency and digestive organ development in Lingnan yellow broilers were investigated. One hundred and forty-four Lingnan yellow broilers at 14 day age were randomly divided into four groups （six repeats in each group, six broilers in each repeat） and fed diets supplemented with 0 （control）, 0.2%, 0.4 %and 0.6 % Gln, respectively. The growth performance and nutrient utilization were measured at 14-28 day age, 29-42 day age, and the end of the test. The tissues were sampled after slaughtering at 42 day age and used to analyze digestive organ development of broilers. The results showed that： compared with the control, 0.2% Gln in diet could improve mucosa thickness of duodenum in broilers significantly （P〈0. 05）, but had no effects on villus height, crypt depth and thickness of jejunum （P〉0.05） ; 0. 4% Gln could significantly increase villus height and thickness of duodenum, villus height of jejunum （P〈 0. 01）, lower crypt depth of duodenum and jejunum, and increase mucosa thickness of jejunum （P〈 0. 05）. At 14-28 day age, 0.4% Gln could increase average daily feed intake and average daily mass gain, lower feed conversion ratio of broilers significantly （P〈0. 05）, promote digestibility of dry matter and crude protein in diets （P〈0.05）. The addition of 0. 4% Gln also improved utilization of crude fiber in diets at 29-42 day age （P〈0.05）. Adding 0.6% Gln in diet could decrease mass of stomachus muscularis significantly （P〈 0.05）, promote average daily mass gain of 14-28 day-old broilers, and increase average daily feed intake, average daily mass gain and dry matter utilization of diet （P〈0.05） and down-regulate feed conservation ratio significantly （P〈0. 05） at 29-42 day age. In conclusion, dietary Gln supplementation, especially 0.4% Gln treatment can improve digestive organ development, nutrient utilization and growth performance in Lingnan ye

关 键 词： 谷氨酰胺 岭南黄肉鸡 生长性能 养分利用率 消化器官发育

领　　域： [农业科学] [农业科学] [农业科学]