Meat and fat dual-purpose breed-Xinhuai pig

Xinhuai pig is a new pig breed bred from Huai pig and Yorkshire pig in Huaiyin area of Jiangsu Province. it is a meat and fat breed, mainly distributed in Huaiyin and the lower reaches of Huaihe River in Jiangsu Province. It has the characteristics of strong adaptability, fast growth, high litter yield, resistance to rough feeding, good hybridization effect and so on.

I. appearance characteristics

The whole body of Xinhuai pig has a black coat and only a few white spots at the end of the body. The head is slightly longer, the mouth is straight and slightly concave, equal to the size in the ear, and droops forward and downward. The waist is straight, the abdomen is slightly larger but not drooping, the buttocks are slightly tilted, the limbs are strong, and the nipples are more than 7 pairs. Adult boars weigh 230 to 250 kilograms and adult sows weigh 180 to 190 kilograms.

II. Production performance

Under the condition of feeding Xinhuai pigs mainly with green feed, the daily gain of finishing pigs from 2 to 8 months was 490g, the consumption of mixture per kilogram, green feed 2.47kg and the optimum slaughtering weight of finishing pigs were 80~90kg. When the body weight is 87kg, the slaughtering rate is 71%, the fat thickness 3.5cm, the eye muscle area 25cm2, the leg-hip ratio 25%, and the carcass lean percentage about 45%. Adult weight of Xinhuai pig, boar 244.2kg, sow 185.22kg. The sexual maturity was earlier, and the boars and sows had sexual behavior at the age of 3 months. The litter number of first-born sows was 10.5 and that of post-parturient sows was 13.23.

III. Hybrid utilization

At medium nutrition level, Neijiang pig was used as male parent and Xinhuai pig as female parent. The body weight of hybrid pig reached 90 kg at the age of 6 months, and the daily weight gain was 560 g at the age of 2 ~ 6 months. Du × 2 (Duroc boar with Erhualian sow) hybrid pig was used as male parent, and Xinhuai sow was used as male parent. the daily gain of the three breeds of hybrid pigs was 590g and 700g. The slaughtering rate is more than 72%, the leg-to-hip ratio is 27%, and the carcass lean percentage is more than 50%.