湖北白猪Ⅳ系母猪哺乳期体重与仔猪窝重变化规律的研究

STUDIES ON THE LAW IN WEIGHT CHANGES OF THE SOW AND HER LITTER DURING LACTATION IN HUBEI WHITE SWINE STRAIN Ⅳ

对24头湖北白猪Ⅳ系五世代初产母猪产后各周体重及仔猪窝重进行测定研究表明:母猪哺乳期体重呈下降趋势,全期降重21.17kg,下降幅度为12.98%,平均每天降重353g,降重规律为前期快后期慢,降重高峰在产后28天;仔猪窝重呈直线增长,全期增重150.75kg,头平均日增重353g,增重规律为前期慢后期快;哺乳母猪体重与仔猪窝重呈显著负相关。

Twenty four primiparous sows and their litters from the fifth generation of strain Ⅳ were weighed each week after parturition. The liveweights of sows declined as lactation proceeded. Arerage weight losses were 21.17 kg and the proportion of weight loss was 12.98% for the whole period of lactation. The rate of loss was 353g per day and most losses were in earlier period of lactation. The peak loss took place at the fourth week after parturition. Litter weihts showed a linear gain and the in crease weight of litter were 150.75kg for the whole sucking period. The mean grouth rate was 353g/day/piglet and was higher in earlier than in later sucking perild. Significant negative relatianships were found between the Uveweight of the sow and the litter weight of piglets.