不同品种·系统后备绵羊零死亡率模式的效益评价

Effectiveness Evaluation of Zero Mortality Model of Different Breed and System Reserve Sheep

[目的]获取不同品种、系统后备绵羊在零死亡率模式下的效益评价,为养殖种羊的出售提供数据参考。[方法]选择平均初生重接近的母羔,春羔考力代43只(A)及罗姆尼24只(B对照)各1群与冬羔考力代37只(C)母羔1群,共104只。记录断奶重、月末体重、计算死亡率。到次年4月份,剔除死亡羔羊后分析7月至次年4月经济效益。[结果]A、B、C组死亡率分别为4.65%、12.5%、16.0%。罗姆尼B组与冬羔考力代C组在0.01水平上极显著差异。冬、春羔考力代与罗姆尼对照极显著差异。A组盛草期羔羊体重变异系数比B组高1.66个百分点,同时B组低于C组1.82个百分点。9月、12月、4月体重与前3个月在0.05水平上显著相关;到12月后至4月除与3月显著相关外,其他月份在0.01水平上极显著相关。6月龄出售种羊,春羔考力代平均理论利润高于罗姆尼93.21元/只,高冬羔考力代15.3元/只。12月的理论利润春羔高罗姆尼93.92元,高冬羔23.15元。在零死亡率情况下12月出售与9月出售相比,各组每只平均损失A组219.5元、B组240元、C组258元。[结论]初生重、断奶重、死亡率之间无相关性;在该地区春羔考力代绵羊具有更好的选育优势,9月(6月龄)为种羊最佳出售时机。

[ Objective ] To get different breed and system reserve sheep in zero mortality model of effectivess evaluation, provide data for the breeding sheep to sell. [ Method] Average birth weight close to the Ewe lamb, the spring lamb system Cory＇ s sheep 43 （A Group） and Rom- ney＇ s sheep 24 （ control B） and winter lamb Cory＇ s sheep 37 （ C Group） Ewe lamb add up to 104 compose 1 Group, record weaning weight, the end of a month weight, compute mortality. To April after next year, analysis of data from July to next April in addition the death of the lamb. [ Result] The death percentage： Each group of A, B, C are 4.65%, 12.5%, 16.0%. Paired samples t-test： The Romney＇ s sheep （B Group） and Cory＇ s sheep （ C Group） absolute value t is very little in other groups, highly significant differences at a P 〈 0.01 level. The Cory＇ s sheep of winter and spring lambs system and Comparison Romney＇ s sheep extremely was pronounced difference. Vigorous grass growth period the weight variability coe^cient of the lamb ： Group A 1.66% higher than group B, Group B is lower than Group C 1.82%. Correlation test ： In Sep- tember, December and April the past 3 months each month weight significantly associated on P 〈 0.05 level ; Significantly related to the Decem- ber to April only the March and the others months highly significantly related at a P 〈0.01 level. The economic benefits： In 6 months age for sale, Every spring lambs Cory＇ s sheep theoretical profit above 1Romney＇ s sheep 93.21 yuan, higher than winter lamb Cory＇ s sheep 15.3 yuan. The December spring lambs Cory＇ s sheep theoretical profit above Romney＇ s sheep 93.92 yuan, higher than winter lamb Cory＇ s sheep 23.15 Yuan. In zero mortality eases to compare for sale the December and September, Each group each lost an average of 219.5 yuan in group A, group B 240 and group C 258 yuan. [Conclusion] No correlation between birth weight, weaning weight, mortality; The Spring lambs in this re- gion of Cory＇ s sheep have better breeding advantage ; The September （ In 6 months age） for sale was the best opportunity.