养殖规模对不同胎次母猪生产力的影响

doi:10.16431/j.cnki.1671-7236.2020.05.011

Abstract

Abstract: The aim of this study was to compare reproductive performance of sows under different parity in different-scale pig farms.The detailed production data for sows from 106 pig farms with different scale were collected.According to the actual number of sow stocks,the farms were divided into four scales:<1 000,1 000-5 000,5 000-10 000 and ≥10 000 heads.The differences of reproductive indexes related to 1-9 births in different scale sow farms were investigated,such as live birth rate,healthy piglet rate,deformed piglet rate,stillbirth rate,mummification rate,weaned piglet rate,the average litter number of total,live,healthy,dead and weaned of piglets,average birth weight and average litter weight.The results showed that the rates of live,healthy and weaned piglets under the same parity increased gradually with the increase of the feeding scale,while the rates of deformed piglet,stillbirth piglet and mummy showed opposite trends.From the 1st litter to the 7th litter except for the 4th,the rates of live,healthy and weaned piglets in the farms with ≥10 000 heads scale were significantly higher than those in the farms with <1 000 heads scale (P<0.05),but were not significantly different from other two scales (P>0.05).The stillbirth rate of the 1st,2nd,3rd,5th and 7th litters in the sow farms with <10 000 heads scale was significantly higher than that of other three scale farms (P<0.05).The number of total,livehealthy,deformed,stillbirth and mummy piglets and average litter weight at birth decreased gradually with the expansion of the breeding scale of the farms.The average number of total,live,healthy,stillbirth and weaned,and average litter weight of the 2nd and 3rd litters in the sow farms with <1 000 heads scale were significantly higher than those in the other three scale farms (P<0.05).In conclusion,the breeding scale had a greater impact on the productivity of sows under different parity.The sow fertility in the medium- and large-scale sow farms (≥1 000 heads) was lower than that in small-scale sow farms(<1 000 heads),but the body condition and survival rate of piglets in these farms were better than those in small-scale sow farms.

Key words: parity; breeding scale; sows; reproductive performance

CLC Number:

S828

LI Xiaoru, LI Feng, YANG Yuqing, LIANG Tong, SHAN Anshan, WU De. Effect of Breeding Scale on the Productivity of Sows with Different Parity[J]. China Animal Husbandry and Veterinary Medicine, 2020, 47(5): 1384-1394.

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Effect of Breeding Scale on the Productivity of Sows with Different Parity

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