【摘要】 为使母猪由年产不足2胎提高到年产2.5胎左右,同时在不增加总饲料量和总费用的前提下,有效地增殖仔猪头数,自1980年开始,连续进行了两年母猪繁殖力的小群对比试验,试验组仔猪于3周(21日)龄断奶,对照组仔猪于6周(42日)龄断奶。1983年进行了仔猪3周龄断奶生产示范性的中间试验。 试验证明,在不用任何乳制品及油脂类饲料的条件下,母猪每胎的产仔数、仔猪成活数及生长速度等各项指标,均不受哺乳期长短的影响,两组间无显著差异(P>0.05)。仔猪于3周龄断奶时,母猪可年产2.5胎,每头母猪年产体重20千克的仔猪数,试验组约为22头,对照组约为16头,两组差异极显著(P<0.01)。此外,3周龄断奶的每头母猪比年产2胎的母猪每年还可增加经济收益90元左右。更多还原

【Abstract】 An experiment on the effect of early weaning of piglets was conducted on a small scale, which lasted for two years. The piglets of the treatment group were weaned at 3 weeks old and those of the control group at 6 weeks old. An enlarged experiment with 50 litters was also carried out in a similar way.No milk or fatty products were used in diets for piglets of the treatment group. It was proved that various traits such as litter size, survival and growth rate of piglets were not significantly affected ( p>0.05 ) by the length of the sucking period ( 6 weeks versus 3 weeks ) .The results also showed that it was possible to produce 2.5 litters with a toral of about 22 piglets per sow per year by weaning piglets at 3 week old, but for weaning at 6 weeks of age each sow produced only 2.0 litters with a total output of about 16 piglets per year. The differance was highly significant ( P<0.01) .An extra economic gain of 90 yuan was achieved per sow per year with the treatment group.更多还原