中州瘦肉型良种猪。正阳县农民养猪历史悠久。明朝县志就有农民养猪的记载。那时多养当地“大耳黑”土猪,体型大,肉肥油多,出肉率高,在产稻区深受欢迎,畅销豫南湖北等地。建国后,1955年建立省营“正阳中型种猪场”,列为全国种仔猪基地。1973年省政府确定正阳为外贸县,建立“外贸种猪场”,促进了正阳生猪改良换代的迅速发展。70年代末,为适应人民生活要求和国际市场需要,生猪由脂肪型向瘦肉型转化,瘦肉率由35%提高到63、18%,创全省之首。1983年正阳生猪列为国家科委的科研项目。据1984年底统计:全县生猪存栏9、2万头,超过1950年一倍。出栏率由40%提高到62%。 1973~1984年出口55万头。1985年正阳县为全省研究发展瘦肉型生猪基地,省农科院帮助建立了发展瘦肉型生猪体系和年出栏2000头的封闭式养猪场。正阳生猪经由土种“正阳大耳黑”改良为“正阳黑”、“正阳花”瘦肉型生猪又与杜洛克、长白、大约克杂交,形成“三元杂交组合”稳定体型。
其特征:背平稍窄,臀略下斜,头目清秀,体驱灵活,鬃肤白色(杜洛克杂交后代呈黑、棕、黄间花);母猪7个月性成熟,年产仔2~2、5窝,每窝8~12头仔猪;生长快,180日龄可达90公斤;肉料比为1:3、01,瘦肉率达63%以上,各项经济指标接近国际先进水平。
Zhengyang Live Pigs
Zhengyang live pig is a fine lean meet breed, which has a long history from Ming Dynasty or even earlier. According to the County Record in Ming Dynasty, local people cultivated this pigs which were big, fat, high-quality, and was well welcomed and has been sold into many places in Henan and Hubei Province. In 1955, this county established a pig factory which stimulated it to become a national pig base. This breed of pigs have characteristics of having flat backs, slight-oblique buttocks, pretty appearances, flexible bodies, white bristles and being mature quickly.