二元杂交肉兔育肥效果的研究

为了验证1989年杂交组合试验结果,1990年进行了重复试验。结果表明;(1)以比利时、加利福尼亚和新西兰白兔为父本,青紫蓝兔为母本的杂种肉兔,其增重速度、饲料转化率等均显示出杂种优势。(2)比×青组育肥效果最好,90日龄体重达2kg,育肥期为52天,日增重27.28±3.42g(P<0.01),杂种优势率26.53％;饲料转化率4.32,杂种优势率21.26％,每千克增重较其它各组节省饲料28.4％～40.0％,经济效益较青紫蓝兔提高39.62％。同1989年试验结果非常接近,证明是个优良的杂交组合。(3)屠宰测定表明,青紫蓝兔和比利时兔骨重率显著高于加利福尼亚免和比×青杂种兔(P<0.01)。

The Fattening Effects of Dual Crossbred Meat Rabbits

In order to verification the results of the crossbreeding com bination in 1989, repeated experiments were conducted in 1990. The results obtained were as follows:(1)The crossbred meat rabbits, sires as Belgian, California and New Zealand White, maternities as Chinchilla, showed heterosis in their weight gaining speed and feed conversion etc. (2)The Bel-Chinehilla group had the best effect: the body weight came up to 2 kilogram at 90 days, the fattening period--52 days, daily weight gaining--27.28±3.42 gram (P<0.01), (heterosis rate 26.53 per eent); feed conversion rate 4.32 (heterosis rate 21.26 per cent). Compared with other groups, the feed saving rate for weight increasing of each kilogram was 28.4--40.0 per cent. The commercial benefit raised 39.62 per cent, compared with Chinchilla. The data was close to that obtained in 1989, indicating that it was an excellent crossbreeding combination. (3)The slaughter test showed that the Chinchilla and Belgian rabbits had a striking higher boneweight rate than the California purebred rabbits and the Bel-Chinchilla crossbred rabbits (P