不同补饲方案对妊娠绒山羊冬春体况及胎儿发育的影响

结合放牧,给妊娠70天的绒山羊补饲精料和粗料,可使其在冬末早春处于增重状态。随着补饲水平的提高,母羊增重、羔羊初生重及初生羔羊皮肤的总体毛囊密度、次级毛囊密度和次级毛囊数与初级毛囊数的比值(S/P)均有不同程度的提高,但初级毛囊密度并不受影响。母体较胎儿对改善营养更敏感,胎儿快速增重与次级毛囊生长同期进行。羔羊出生时绝大多数初级毛囊已进入活动状态,而次级毛囊尚未开始活动。初生羔羊较成年山羊具有较低的S/P值和较高的总体毛囊密度。

EFFECTS OF DIFFERENT SUPPLEMENTATIONS ON BODY CONDITION IN WINTER AND SPRING AND ON EMERYO EDVELOPMENT OF PREGNANT CASHMERE DOES

Supplementing concentrates and roughage to cashmere does (70 days in pregnancy) grazing on winter and spring desert range could keep the bodyweight in gaining status. With the increasing in supplement level, does weight gain, kids birth weight, densities of total and secondary follicles and S/P (Ratio of quantities of secondary to primary follicles) value of kids skin had all be improved to different extents respectively, but not for primary follicle density. The does were more sensitive to nutrition improvement than were embryos, and the rapid gain in embryo weight synchronized with the development of secondary follicles. Primary follicles in kids skin had gone into activation before birth, but not for the most of secondary follicles. Higher S/P value and lower total follicle density were found i kids at birth than in mature goats.