Interactions between the associations of parity, lactation length, and weaning-to-conception interval with subsequent litter size in swine herds using early weaning
Interactions between the associations of parity, lactation length, and weaning-to-conception interval with subsequent litter size in swine herds using early weaning
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DOI：
10.1016/s0167-5877(98)00103-2
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发表时间：
1998-12-01
影响因子：
2.6
通讯作者：
Dial, GD
中科院分区：
文献类型：
--
作者：
Koketsu, Y;Dial, GD
根据生产者愿意记录生产和泌乳期采食量的情况，选择了平均泌乳期为14.9至18.9天的16个农场。数据包含9162个随后的窝仔记录，这些记录是从计算机化的生产信息系统文件和哺乳期采食量记录中提取的。在相同的统计模型中，发现产次和哺乳期长度以及产次和断奶至受孕间隔与随后的窝仔数之间存在双向相互作用。随着泌乳时间的增加，第1胎和第2胎的后续产仔数没有增加-但第3-6胎母猪的后续产仔数增加。仅在第1胎次中，断奶至受孕间隔6-12天的母猪在随后分娩时比断奶至受孕间隔1-5天的母猪少产0.5头猪。然而，在经产母猪中，断奶至受孕间隔1-5天和6-12天之间的后续产仔数没有差异。(C)1998 Elsevier Science B. V.保留所有权利。
Sixteen farms having an average lactation length between 14.9 and 18.9 days were selected based upon producers' willingness to keep records of production and lactation feed intake. Data contained 9162 subsequent litter-size records abstracted from computerized production information-system files and lactation feed-intake records. Two-way interactions between the associations of parity and lactation length, and parity and weaning-to-conception interval with subsequent litter size were found in the same statistical model. Subsequent litter size did not increase in parities 1 and 2 as lactation length increased - but subsequent litter size in sows of parities 3-6 increased. In only parity 1, sows with weaning-to-conception interval 6-12 days produced 0.5 fewer pigs at subsequent farrowing than those with weaning-to-conception interval 1-5 days. However, in multiparous sows, no difference in subsequent litter size was found between weaning-to-conception intervals 1-5 and 6-12 days. (C) 1998 Elsevier Science B.V. All rights reserved.