饲粮营养水平对羔羊生产性能和采食行为的影响  

Effects of nutrition level on growth performance and eating behavior of early growing lamb

作　　者：周勇[1] 李冲[1] 李发弟[1] 马友记[1] 姜仲文 魏占虎[1] 

机构地区：[1]甘肃农业大学动物科学技术学院,甘肃兰州730070 [2]甘肃省永昌肉用种羊场,甘肃永昌737200

出　　处：《甘肃农业大学学报》2013年第3期28-34,共7页Journal of Gansu Agricultural University

基　　金：现代农业产业技术体系建设专项资金(CARS-39)

摘　　要：采用3×2×2因子设计,研究不同营养水平(A因子:A1为1.0倍NRC,A2为0.9倍NRC,A3为0.8倍NRC)、遗传背景(B因子:B1为甘肃肉羊新品种选育群羔羊,B2为‘杜泊’(♂)×甘肃肉羊新品种(♀)F1代羔羊)和性别(C因子:C1为公羔,C2为母羔)条件下羔羊的生产性能、采食行为和经济效益.结果表明:A1组羔羊试验末体质量和平均日增质量极显著高于A2和A3组(P<0.01),料肉比极显著低于A2和A3组(P<0.01);B1组羔羊平均日增质量极显著低于B2组(P<0.01),料肉比极显著高于B2组(P<0.01);C1组羔羊平均日增质量极显著高于C2组(P<0.01),料肉比显著低于C2组(P<0.05).随营养水平的降低,羔羊每个逆呕食团咀嚼次数显著上升(P<0.05);B1组羔羊反刍时间极显著低于B2组(P<0.01).根据经济效益分析,A1组羔羊纯收入极显著高于A2和A3组(P<0.01);B1组纯收入极显著低于B2组(P<0.01);C1组纯收入极显著高于C2组(P<0.01).说明杜甘杂种羔羊生产性能和经济效益较高;公羔的生产性能和经济效益优于母羔;采用1.0倍NRC的饲粮可以获的最佳生产性能和最大经济效益.This experiment used 3 × 2 × 2 factor design to investigate the effects of different nutrition level （A factor, A1 - 1.0 × NRC, A2-0. 9 × NRC and A3-0.8× NRC）, genetic background （B factor, B1-Gansu modern breeding sheep group and B2-‘ Doper＇（ ♂ ） ×Gansu modern breeding sheep group（♀ ）F1 lambs） and sex （C factor,Cl-male and C2-female） on growth performance, eating behavior and economic benefit. The results showed that A1 had higher final weight and average daily gain （P〈0. 01） and lower FIG （P%0. 01） than that of A2 and A3 ,B1 had lower average daily gain （P〈0. 01） and higher F/G（P〈0. 01） than that of B2 ,and Cl had higher average daily gain and lower F/G than that of C2 （P〈0. 05）. With the descending of nutrition level, chewing times for every bolus increasing （P〈0. 05） ,and gl had lower ruminant time than that of B2 （P〈0. 01）. Based on economic benefit analyzing, Al had higher net income than that of A2 and Aa, but there were no significant difference between A2 and A3 （P〈0. 05）, feed cost reducing as the nutrition level descending;B1 had lower feed cost （P〈0. 05） and net income（P〈0. 05） than that of B2. The net income of Cl was higher than that of C2 （P〈0.01）. So using ＇Doper＇ as the male parent to hy- brid the Gansu modern breeding group sheep could increase growth performance and economic benefit;male lambs had better growth performance and economic benefit than female lambs;lambs with 1.0 × NRC could obtain the best growth performance and economic benefit.

关 键 词：绵羊 营养水平 生产性能 采食行为 经济效益 

分 类 号：S826[农业科学—畜牧学]