Yujian Pig

Yujian Pig

　　Y-

　　Breed Description

　　Origin and Distribution: Y-, also known as Yushan Black Pig, Guangfeng Black Pig, or Jiangshan Black Pig, is mainly produced in the ancient city, Yanrui, Xiazhen, Sigouqiao, Liudu, and Qunli of Yushan County in Jiangxi Province, and in Daqiao, Tanshi, and Guancun of Jiangshan County in Zhejiang Province. Y- is distributed in Guangfeng, Shangrao, Hengfeng, and Yanshan counties in Jiangxi Province, as well as Changshan, Qu Shan, and Suichang counties in Zhejiang Province.

　　Growth Environment: The production area features semi-mountainous and semi-hilly terrain, with a mild climate, abundant rainfall, and a long frost-free period. Crops are typically grown three times a year, predominantly rice, followed by corn, beans, wheat, barley, sweet potatoes, and carrots. There is an abundance of agricultural by-products and green juicy fodder, providing favorable conditions for pig farming. The region has a large population but limited arable land. To secure fertilizer sources for agriculture and increase income, pig farming has traditionally been a major sideline for local households.

　　Appearance Characteristics: Y- pigs are slightly smaller in size with a looser body structure. They have medium-sized, drooping ears, a short and wide snout that is slightly upturned, a short and full neck, a relatively broad back and waist that is slightly concave, moderately sized bellies, slightly full and slightly sloping hips, shorter and sturdy limbs, loose skin, and short hair. Their coat is entirely black, with around 6 pairs of teats.

　　Breed Performance: Adult Y- boars weigh 84.22±4.39 kg, measure 118.48±2.21 cm in body length, 100.64±2.05 cm in chest girth, and 62.36±1.22 cm in body height. Adult Y- sows weigh 75.63±0.78 kg, measure 111.54±0.42 cm in body length, 98.53±0.41 cm in chest girth, and 54.53±0.18 cm in body height. First parity sows produce 8.56±0.31 piglets, with 7.50±0.36 surviving; second parity sows produce 9.51±0.36 piglets, with 8.16±0.27 surviving; third and higher parity sows produce 11.61±0.19 piglets, with 10.38±0.16 surviving. During the fattening period, daily weight gain is 290–362 grams, the slaughter rate is 70%–75%, backfat thickness is 4.5–5.5 cm, and lean meat percentage is 37.2%.

　　Comprehensive Evaluation: Y- is a relatively numerous local pig breed distributed in eastern Jiangxi and western Zhejiang. It is characterized by early fat deposition and good fat quality.