中州瘦肉型良種豬。正陽縣農(nóng)民養(yǎng)豬歷史悠久。明朝縣志就有農(nóng)民養(yǎng)豬的記載。那時(shí)多養(yǎng)當(dāng)?shù)?ldquo;大耳黑”土豬，體型大，肉肥油多，出肉率高，在產(chǎn)稻區(qū)深受歡迎，暢銷豫南湖北等地。建國后，1955年建立省營“正陽中型種豬場”，列為全國種仔豬基地。1973年省政府確定正陽為外貿(mào)縣，建立“外貿(mào)種豬場”，促進(jìn)了正陽生豬改良換代的迅速發(fā)展。70年代末，為適應(yīng)人民生活要求和國際市場需要，生豬由脂肪型向瘦肉型轉(zhuǎn)化，瘦肉率由35%提高到63、18%,創(chuàng)全省之首。1983年正陽生豬列為國家科委的科研項(xiàng)目。據(jù)1984年底統(tǒng)計(jì)：全縣生豬存欄9、2萬頭，超過1950年一倍。出欄率由40%提高到62%。 1973～1984年出口55萬頭。1985年正陽縣為全省研究發(fā)展瘦肉型生豬基地，省農(nóng)科院幫助建立了發(fā)展瘦肉型生豬體系和年出欄2000頭的封閉式養(yǎng)豬場。正陽生豬經(jīng)由土種“正陽大耳黑”改良為“正陽黑”、“正陽花”瘦肉型生豬又與杜洛克、長白、大約克雜交，形成“三元雜交組合”穩(wěn)定體型。
     
    其特征：背平稍窄，臀略下斜，頭目清秀，體驅(qū)靈活，鬃膚白色（杜洛克雜交后代呈黑、棕、黃間花）；母豬7個(gè)月性成熟，年產(chǎn)仔2～2、5窩,每窩8～12頭仔豬;生長快,180日齡可達(dá)90公斤;肉料比為1:3、01,瘦肉率達(dá)63%以上,各項(xiàng)經(jīng)濟(jì)指標(biāo)接近國際先進(jìn)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.