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猪的优良品种是进行杂交改良.提高原始猪种品质,开展经济杂交,利用其杂种优势不可缺少的宝贵资源。为使读者了解有关知识,下面介绍几个优良猪种的特征及生产性能。约克夏猪:原产于英国,分布于世界各地。我省于建国初期引进,与本地猪进行杂交。该猪种体躯长而平整,背部宽阔,四肢肌肉发达,坚强而直立,毛色全白。母猪每窝产仔10-15头,幼猪发育迅速,一年左右体重可达140kg,每日增重不少于0.5kg,成熟稍晚,
Breeds of pigs are improved hybrids to improve the quality of the original pig breeds, to carry out economic hybrids, the use of their heterosis is an invaluable resource. In order to make readers understand the relevant knowledge, the following describes the characteristics and production performance of several fine pig breeds. Yorkshire Pigs: Native to the United Kingdom and distributed throughout the world. The province was introduced in the early days of the founding of the Republic and was crossed with local pigs. The pigs body length and smooth, back wide, muscular limbs, strong and upright, all white coat. Sows each litter 10-15 head litter, piglets developed rapidly, about one year weighing up to 140kg, daily gain of not less than 0.5kg, mature later,