产羔期、补饲水平对考力代羊生产和繁殖性能影响的研究  

THE STUDY OF LAMBING DATE AND SUPPLEMENTARY FEEDING ON THE PERFORMANCE OF CORRIEDALE EWES AND LAMBS

作　　者：张荣[1] 蒋文兰[1] 李向林[1] 

机构地区：[1]甘肃草原生态研究所

出　　处：《草业科学》1994年第3期63-69,共7页Pratacultural Science

摘　　要：为了研究草地一绵羊系统中草畜供求间的动态平衡，寻求在人工草地放牧条件下适宜的产羔时期及在此时期给产羔母羊的合理补饲水平，１９９０～１９９３年，在贵州省威宁县灼甫联户示范牧场进行了两期产羔期及补饲水平对绵羊生产性能影响的试验。产羔期的改变，导致了母羊及羔羊体重的不同变化趋势。结果显示出母羊体重对其生产、繁殖性能的重要性。春羔母羊配种前体重较之冬羔母羊提高９．７５ｋｇ，两者产羔率分别为１３９．２％和１１６．１％。春羔母羊较高的双羔率导致了春羔母羊较之冬羔母羊更低的繁殖成活率（分别为９１．２％和１０４．７％）。断奶时，春羔较之冬羔体重高５．２５ｋｇ，但断奶以后这种优势即消失了。补饲水平的差异对母羊及羔羊体重有一定的影响，但在牧草丰富的条件下表现得并不很强烈。A trial was conduted at the Zhoupu Demonstration Farm located in the western high country ofGuizhou Province, from 1990 to 1993,to study the effect of lambing date and supplementary feeding onthe performance of corriedale sheep a nd to provide information on matching pasture growth and animaldemand over the year.The change in lam bing date led to different patterns of ewe and lamb liveweights.The results showed the importan ce of ewe liveweight to ewe reproductive performance. The average pre-mating liveweight of spring lambing ewes was 9.7 5 kg higher than the winter lambing ewes resulting in alambing rate of 139.2% lambs born to ewes inlamb(winter lambing 116.1%).The high twinning ratesmeant that lamb birth weight was lower in the spring lambing ewes leading to a high lamb mortality and afinal lamb weaning rate of 91.2%which was lower than for the winter lambing ewes weaning rate of104.7%. Spring lambs where 5.25kg heavier at weaning but lost this advantage after weaning.Supplementary feeding slightly affected the livewcights in both ewes and lambs but if sufficient pasture wasgrazed in-Situ supplements had litile effect on performance.

关 键 词：产羔期 补饲 考力代羊 繁殖性能 

分 类 号：S826.3[农业科学—畜牧学]