哺乳仔猪不同断奶日龄对规模化养猪生产效率的影响

The Effect of Age at Weaning of Piglets on Efficiency of Pig Production

将长大二元杂交母猪29头及其所产仔猪29窝共计335头仔猪随机分成3组,以探讨仔猪35d、42d、49d断奶对母猪年生产力和仔猪自身生长速度的影响(即对养猪生产效率的影响).试验结果表明:母猪窝平产仔猪、窝平产活仔数两季相比差异不显著(p>0.05),母猪断奶至发情间隔、断奶至配种间隔各组之间差异不显著(p>0.05),猪只70日龄个体重、170日龄个体重各组之间差异不显著(p>0.05).仔猪35d断奶,母猪年生产胎次增加约0.1胎,商品猪出栏数增加1～1.2头,母猪年出活猪增加100～120kg.

For researching the effect of age at weaning, 35d,42d or 49d, on annual productivity of sowsand growth rate if piglets which is equal to efficiency of pig production, 29 sows of binary hybridixation in L×LW and their 335 piglets were divided into three groups.The results showed that the average litter size and average live litter size had no significant difference in comparison between two seasons(p>0.05).The interval weaning to estrous and weaning to mating had no significant difference among(p >0.05). Weaning at 35 age in days, the annual pqrity number of sows increased by 0.1, off-take number of commericial pigs increased by l to 1.2 and annual live pig prouctivity of sows increased by 100 to120kg. It is feasible that piglcts were weaned at 35 days of age under curent condition of commericial pig-farm in Hubei.