摘要
为探讨工厂化养猪的经济断奶日龄，进行了３５、４２、４９、５６ｄ等４组不同断奶日龄仔猪的大群饲养对比试验，结果表明：①断奶后仔猪都顺次经历适应生长，恢复生长，时间不等的补偿生长和正常生长的４个生长发育期。②不同断奶日龄，仔猪生长速度短期内有一定影响，但通过补偿生长，达到９０日龄时各组个体平均重差异不显著（Ｐ＞００５）。③断奶后４组发病率依次为７０７％、６７４％、５００％和４７９％；出栏率（育成率×育肥率）依次为８７１％、８７４％、９０５％、８９５％。④断奶后９５％的母猪在４～５ｄ正常时间内发情配种，同一头母猪的本、次胎的产仔数和产活仔数差异不显著。⑤哺乳时间不等，母猪年产胎数差异显著（Ｐ＜００５），４组母猪年产仔依次为２３７、２２７、２１８和２０８胎；哺乳失重率依次为１６１９％、２０５９％、２２２２％和２３６９％。⑥育肥猪出栏头均盈利依次为１４４７９、１７２０５、１５４９９和１４３８０元，母猪年盈利依次为８６０９４、１２８０４２、７１０８３和２３７９９元。综合考虑得出目前条件下最适断奶日龄为４２ｄ左右。
For studing the economical
weaning age under current condition of pig industry in our country,the large feeding
exxperiment about contrast observation of four groups piglets at varying age at
weaning,35d,42d,49d and 56d was conducted.The results showed that all piglets had passed
four growing and developing periods in order,which were adaptive growth,recovering
growth,Compensatory growth in varying time and normal growth.Varying weaning age in days
had priority effect on growth rate of piglets in short term,but each group has no significant
difference in average individual weight(P>005) after 90 age in days by compensatory growth in
varying time.The morbidity of these groups after weaning were 7069%,6744%,50% and
4792%,respectively.The rate of rearing fattening were
8706%,8744%,905%,895%,respectively.About 95% sows estrusing and mating in four or five
days after weaning.Its the normal time.Litter number,each group has significant
difference(P<005),the litter number per year of four groups were 237,227,218 and
208,respectively.And rate of weight losing for lactation were 332%,424%,462% and
502%,respectively.Average profit per fattening pig of four groups were RMB 1448,1721,1549
and 1438yuan,respectively.And per sow were RMB 86094,128042,71083 and
23799,respectively.Take account of seven factors comprehensively,the most optimum weaning
age in days is 42d in current condition.
出处
《湖北农业科学》
1999年第3期44-47,共4页
Hubei Agricultural Sciences
基金
"九五"国家重点科技攻关计划
关键词
断奶日龄
肥育性能
繁殖性能
经济效益
仔猪
weaning age in days,fattening
performance,reproductive performance,economic benefit
