细毛羊腹毛高弯发生发展的研究——细毛羊腹毛高弯问题的研究(V1)

经澳大利亚和新西兰美利奴羊导血的我国镇南种羊场斯达夫细毛羊(澳血含量为37.78％)所产的羔羊于3月龄内(70～90天)开始出现高弯腹毛(约占10.47％)。首先出现在脐前部和腹缘左右内侧部,以靠近左右腹侧线内的腹前部和腹中部出现得最多。高弯腹毛随月龄的增长而逐渐扩展。试验羊第1次剪毛前高弯腹毛出现率高达94.19％,其中:高弯腹毛面积5cm×5cm内(含5×5)的(类羊)占6.98％,5cm×5cm～10cm×10cm的(类羊)占20.93％,10cm×10cm～15cm×15cm的(类羊)占26.74％,15cm×15cm以上的(类羊)占39.54％。此外,正常弯(类羊)仅占5.81％。高弯腹毛的分布状态呈块斑状,其表现特点以3块斑为最多(39.53％),次为连片斑(16.28％),再次为两块斑(11.63％),1,4,5块斑各占8.14％,6块斑仅占2.33％。细毛育成母羊的高弯腹毛面积的大小对体侧毛的弯曲数、毛长、细度、密度和体重均无显著影响。较大面积高弯腹毛羊(类羊)腹毛着生不良,毛纤维较细,腹中和腹后部毛长随高弯毛面积增大而变短。

STUDY ON THE GENERATION AND DEVELOPMENT OF ABDOMINAL FIBRE IN FINE-WOOL SHEEP

The lambs of Staffropol Fine-wool sheep derived from Australian Merino and New Zealand Merino slieep (Australian blood accounted for 37.78%) began to appear highcrimped abdominal fibre (HCAF) (10.47%) at 3 month of age (70～90 days). First, it appeared in the areas of the front of navel and,of the left and right internal abdomen reason, and on the internal soidef abdomen reasonThe area of HCAF expanded with the month age. The rate of appearance of HCAF before first shearing was up to 94.14%. The distribution of HCAF was spot-shaped. Most of it was of three-soot shape. The crimple number of the side wool, its length, thin ness density and body weight were not remarkably affected by the area of HCAF. when the area of HCAF was comparatively large, it did not grow well. The fibre was thinner, the wool length in the area of the middle and rear abdomen when the area of with increas of the area of HCAF