东北民猪和哈尔滨白猪毛的数量长度、粗度和真皮厚度的测定

东北民猪和哈尔滨白猪毛的数量在初生猪和15公斤体重阶段没有显著差异。在60公斤体重以后各阶段东北民猪的毛量多于哈尔滨白猪的,毛量随着体重的增长而相对地减少。绒毛是东北民猪所特有,但初生猪没有绒毛。绒毛的数量在夏季稀少,冬季密布。粗毛的长度和粗变,随着体重的增加而加长和加粗。绒毛的粗度也随着体重的增加而加粗。东北民猪和哈尔滨白猪的真皮厚度初生时没有显著差异,随着体重增加而显著加厚。东北民猪的真皮厚得多,尤其在90公斤体重比60公斤体重的真皮加厚一倍。

MEASUREMENTS OF HAIR DENSITY, LENGTH AND DIAMETER AND ON CORIUM THICKNESS OF NORTHEAST NATIVE AND HARBIN WHITE PIGS

There was no significant difference in fair density between pigs of the Northeast Native breed and Harbin White at birth and at 15kg live weight. Hair density per unit skin surface of the Northeast Native pigs was higher than that of Harbin White pigs after 60kg body weight. Number of hair per cm~2 reduced in parallel body weight growth. Underhair was characteristic of the Northeast Native pigs, except at neonatal. Harbin White pigs had no underhair at any age. In the Native it was sparse in summer and dense in winter. Its diameter increased along with body weight. There was no singnificant difference in the thickness of the corium between Northeast Native pigs and Harbin White pigs at birth. Corium thickness increased gradually along with body weight, with the Native notably thicker afterwards, which almost doubled during the 60 to 90kg body weight incrcase stage.