猪周期下规模猪场如何使用终端轮回杂交踏准节奏快速增减能繁母猪

近期猪价的大幅持续下跌，让养猪企业再次尝到了持续亏损的痛苦。文章介绍了生猪价格周期（猪周期）的特点和产生原因，并说明了顺猪周期进行养殖规模的调整对于减少商品猪养殖企业亏损的重要性。举例说明了顺猪周期进行能繁母猪数的减少和增加，可减少低猪价期的亏损。介绍了如何利用终端轮回杂交繁育体系在四年一轮回的猪周期踏准节奏进行商品猪的生产。还比较了杜长大三级繁育体系与终端轮回杂交繁育体系的区别，介绍了终端轮回杂交繁育体系的优势、对猪育种的影响和应用前景。

How to reduce the losses using terminal rotational crossing system to rapidly adjust sow-breeding scale during low hog price period

Pig production companies suffered the pain of continuous losses once again because of the sharp and continuous decline of hog prices recently. This article introduced the characteristics and causes of hog price cycle, and explained the importance of adjusting breeding scale along the hog price cycles to reduce the losses of pig farms. An example was given to illustrate adjusting sow-breeding scales along the hog price cycle can reduce the losses during the low hog price period. This article also introduced how to use the terminal rotational crossing system to produce commercial pigs in a cycle of four years. The differences between the three-grade pig breeding system (Duroc×Landrace×Large White) and the terminal rotational crossing breeding system were compared, and the advantages, impact on pig breeding and application prospect of the terminal rotational crossing breeding system were introduced.