N-氨甲酰谷氨酸对滩羊乏情期诱导同期发情效果的影响  

Effect of dietary N-carbamoyl glutamate(NCG)on induced synchronization of Tan sheep in non-breeding season

作　　者：施安 李聚才 马小明 张俊丽 金鹿 张崇志 孙海洲 SHI An;LI Jucai;MA Xiaoming;ZHANG Junli;JIN Lu;ZHANG Chongzhi;SUN Haizhou(Institute of Animal Science,Ningxia Academy of Agriculture and Forestry Sciences,Yinchuan,Ningxia 750002,China;Inner Mongolia Academy of Agricultural&Animal Husbandry Sciences Institute of Animal Nutrition and Feed,Huhehaote,Inner Mongolia 010031,China)

机构地区：[1]宁夏农林科学院动物科学研究所,宁夏银川750002 [2]内蒙古自治区农牧业科学院动物营养与饲料研究所,内蒙古呼和浩特010031

出　　处：《中国饲料》2021年第17期39-45,共7页China Feed

基　　金：宁夏对外科技合作专项(DW-X-2018017)。

摘　　要：为研究N-氨甲酰谷氨酸(NCG)对滩羊母羊在非繁殖季节诱导同期发情效果的影响,试验采用随机区组设计,选择同期经产母羊200只,分为4个试验组,每组50只,分别在母羊空怀期和妊娠期饲喂不同梯度的NCG预混料至全混合日粮(TMR)。在滩羊非繁殖季节乏情期,对空怀母羊采用PRID+PMSG+LRH-A3+PG诱导发情处理;对其羔羊实行早期隔栏补饲及早期断奶,羔羊组补饲营养水平及饲养管理条件一致,测定其繁殖性能指标。结果表明:试验2组第1情期受胎率(第二同期处理)、产羔率、产双羔率、断奶重和断奶成活率分别比4组(CK)提高45.83%、20.45%、210.13%、11.00%和5.83%(P>0.05),其妊娠早期胚胎死亡率、空怀天数和产羔间距分别比4组降低33.37%、3.54%和1.34%(P>0.05);试验1组第1情期受胎率(第一同期处理)、羔羊初生成活率和断奶成活率分别比4组提高43.58%、5.32%和7.90%(P>0.05),妊娠早期胚胎死亡率比4组降低65.98%(P>0.05);试验3组羔羊初生重比4组提高4.53%(P>0.05),妊娠早期胚胎死亡率比4组降低11.11%(P>0.05)。结果提示,在滩羊非繁殖季节乏情期,母羊添加NCG 1.027 g/d DM(空怀期)和1.195 g/d DM(妊娠期)饲粮,能提高母羊的第1情期受胎率、产羔率、产双羔率、羔羊断奶重及断奶成活率,减少妊娠早期胚胎死亡率、羔羊断奶天数、母羊空怀天数和产羔间距等繁殖力指标,可作为滩羊实现“两年三产”高频繁殖目标的优选饲粮方案。The study explicated the effect of dietary N-carbamoyl glutamate(NCG)on induced syhcnronization of Tan sheep in non-breeding season.In the single factor random grouping test,200 multiparous ewes were selected and divided into 4 groups,with 50 per group.Fed NCG gradient diets during the opening period and pregnancy.Synchronized estrus treatment what were PRID+PMSG+LRH-A3+PG for the opening period ewes in non-breeding season.Early weaning measure for supplemental feeding lambs with consistent nutritional level and feeding condition.Determined reproductive performances on ewes.The results showed as follows:Compared with the test group 4(blank group),in the first period of the test group 2,fertility rate,lambing rate,twinning rate,weaning weight and survival rate of weaning increased by 45.83%,20.45%,210.13%,11.00%and 5.83%in turn(P>0.05).Early pregnancy embryo mortality rate,the opening day and lamb spacing decreased by 33.37%,3.54%and 1.34%(P>0.05).Compared with the test group 4,in the first period of the test group 1,pregnancy rate,survival rate of lamb birth and survival rate of weaning increased by 43.58%,5.32%and 7.90%(P>0.05).Early pregnancy embryo mortality rate decreased by 65.98%(P>0.05).The birth weight of the test group 3 was 4.53%higher than that of the groups 4 and early pregnancy embryo mortality rate was 11.11%lower than the same group(P>0.05).The results suggested that the diets added with 1.027 g/d DM(the opening period)and 1.195 g/d DM(pregnancy)NCG in Tan sheep with non-breeding season,which could improve pregnancy rate,lambing rate,twinning rate,lamb weaning weight,survival rate of weaning and reduced early pregnancy embryo mortality rate,lamb weaning days,the opening day and lamb spacing in the first period of sheep respectively.This NCG level in diets was ideal for reproductive traits,which could be used as the optimize feeding scheme in order to achieving the high-frequency reproductive production goal of“three parturition within two years”.

关 键 词：N-氨甲酰谷氨酸 滩羊 诱导发情 繁殖性状 两年三产 

分 类 号：S816.7[农业科学—饲料科学]