高产母猪窝内体重变异的营养调控

随着现代育种技术的发展,母猪的产仔数不断提高,然而,初生仔猪窝内体重变异也随之增大,导致断奶前死亡率增加,断奶后体重差异大,成为现代养猪生产中影响营养精准供给、管理效率提高和生产效益增加的主要限制因素。本文综述了初生仔猪窝内体重变异的影响因素,探讨了能量来源、蛋白质与氨基酸水平以及功能性添加物对降低初生仔猪窝内体重变异的调控作用及可能机制,为通过营养途径提高窝内整齐度提供参考依据。

Nutritional Regulation of Within-Litter Weight Variation for Hyperprolific Sows

With the development of modern breeding technology, the live litter size of sows is increasing.However, it is accompanied by a larger variance of birth weight within a litter, resulting in increased before-weaning mortality and larger discrepancy of body weight at weaning.These consequences make it difficult to achieve higher nutritional and management efficiency and more economic benefits.In this paper, we summarized the primary factors affecting the within-litter variance of birth weight, discuss the effects and related mechanisms of dietary energy source, protein and amino acid levels and functional additives in order to reducing the within-litter variance of birth weight, which may provide a reference for improving the uniformity of newborn pigs through nutritional manipulation.