饲养密度对肉仔鸡早期生长性能、免疫和抗氧化功能的影响  

Effects of Stocking Density on Early Growth Performance,Immune and Antioxidant Function of Broilers

作　　者：邢媛媛[1] 徐元庆[1] 金晓[1] 史彬林[1] XING Yuanyuan;XU Yuanqing;JIN Xiao;SHI Binlin(College of Animal Science,Inner Mongolia Agricultural University,Hohhot 010018,China)

机构地区：[1]内蒙古农业大学动物科学学院,呼和浩特010018

出　　处：《动物营养学报》2020年第9期4116-4122,共7页CHINESE JOURNAL OF ANIMAL NUTRITION

基　　金：内蒙古自治区“草原英才”工程项目(CYYC5047)。

摘　　要：本试验旨在研究饲养密度对肉仔鸡早期生长性能、免疫和抗氧化功能的影响。试验采用完全随机设计,选取192只1日龄爱拔益加(AA)肉仔鸡,随机分为2个组,分别为低饲养密度组(LSD组)和高饲养密度组(HSD组),每组12个重复,每个重复8只鸡。低饲养密度为10只/m 2,高饲养密度为20只/m 2。试验期共21 d。在试验开始第1天记录肉仔鸡初始体重,于第21天称重、结料,计算平均日增重(ADG)、平均日采食量(ADFI)和料重比(F/G);并从每个重复随机选取1只鸡,进行翅静脉采血,制备血清用于测定免疫和抗氧化功能指标,随后称活重并屠宰,取脾脏、胸腺和法氏囊称重并计算免疫器官指数。结果表明:1)LSD组肉仔鸡ADG和ADFI极显著高于HSD组(P<0.01);2)LSD组肉仔鸡血清过氧化氢酶活性极显著高于HSD组(P<0.01),血清总抗氧化能力有高于HSD组的趋势(P=0.09),而血清活性氧含量极显著低于HSD组(P<0.05);3)LSD组肉仔鸡血清白细胞介素-10和免疫球蛋白A含量显著高于HSD组(P<0.05),血清白细胞介素-2含量有高于HSD组的趋势(P=0.08)。综合以上结果可以得出,在网上平养条件下,与20只/m 2的饲养密度相比,10只/m 2的饲养密度对肉仔鸡早期(1~21日龄)的生长更有利。The study was conducted to investigate the effects of stocking density on early growth performance,immune and antioxidant function of broilers.A total of 192 Arbor Acres(AA)broilers(1 day of age)were randomly divided into two groups,named the low stocking density group(LSD group)and the high stocking density group(HSD group),with 12 replicates in each group and 8 chickens in each replicate.The low stocking density was 10 birds/m 2 and the high stocking density was 20 birds/m 2.The experiment lasted for 21 days.The initial weight of broilers was recorded on day 1,and broilers were weighed and fed on day 21.Then the average daily gain(ADG),average daily feed intake(ADFI)and feed to gain ratio(F/G)were calculated.On day 21,one chicken in each replicate was randomly selected and blood was collected from the wing vein to prepare the serum samples for measuring the immune and antioxidant function indices,then the live weight of selected broilers was weighed and broilers were slaughtered,the spleen,thymus and bursa were taken and weighed and the immune organ index was calculated.The results showed as follows:1)the ADG and ADFI of broilers in the LSD group were extremely significantly higher than those in the HSD group(P<0.01);2)the serum catalase activity of broilers in the LSD group was extremely significantly higher than that in the HSD group(P<0.01),the serum total antioxidant capacity of broilers in the LSD group tended to be higher than that in the HSD group(P=0.09),while the serum reactive oxygen species content of broilers in the LSD group was extremely significantly lower than that in the HSD group(P<0.01);3)the serum contents of interleukin-10 and immunoglobulin A of broilers in the LSD group were significantly higher than those in the HSD group(P<0.05),and the serum interleukin-2 content of broilers in the LSD group tended to be higher than that in the HSD group(P=0.08).In conclusion,compared to 20 birds/m 2,10 birds/m 2 is a more favorable stocking density for early growth of broilers(1 to 21 days of age)unde

关 键 词：饲养密度 肉仔鸡 生长性能 免疫 抗氧化 

分 类 号：S831.4[农业科学—畜牧学]