仔猪哺乳期的生长发育分析

为了研究哺乳期仔猪的生长发育规律,为猪的育种和仔猪培育提供科学依据,对西北农林科技大学教学实验农场种猪场1998-2002年生产的1871头长白种猪和140头大约克种猪的初生重、20日龄体重、60日龄体重(断奶重)的测定结果进行分析,利用累积生长、绝对生长、相对生长、生长系数等度量生长发育速度和强度的指标对长白猪和大约克猪两个品种的仔猪及同一品种内不同性别的仔猪在哺乳期的生长发育速度和强度进行了统计分析。用长白仔猪、大约克仔猪的测定结果对其初生重、生长系数、绝对生长采用单因子二水平组内重复数不等资料进行方差分析。结果表明,长白仔猪的平均初生重比大约克猪低1.6%,经方差分析差异不显著(P>0.05);仔猪在出生后20日龄、60日龄两个阶段长白猪的生长发育速度(绝对生长)、生长强度(相对生长)均高于大约克猪,经方差分析差异均显著(P<0.05);而同一品种内,公猪的平均初生重大于母猪,20日龄时公猪的生长发育速度高于母猪,而至60日龄(即断奶时)时母猪的生长发育速度超过公猪,在20日龄、60日龄时公猪的生长发育强度均小于母猪。

Growth Analysis of Piglet at Lactation Period

In order to study on the regular pattern of growth in piglet,the data were collected from 1871 Landrace piglets and 140 Large Yorkshire piglets in 1998-2002.The weight at birth,20-day body weight and weight at weaning(60-day body weight)were determined in pig trial farm of Northwest A F University.The growth rate and growth intensity such as cumulative growth,absolute growth,relative growth and growth coefficient at lactation period were calculated.The results shown that no significant difference(P>0.05)was in the weight at birth between Landrace and Large Yorkshire;the growth rate(absolute growth)and growth intensity(relative growth)of Landrace are all significant higher(P<0.05)than those of Large Yorkshire at 20-day and 60-day of age;the growth intensity(relative growth)of gilt are all significant higher(P<0.05)than those of little boar in same breed at 20-day and 60-day of age.