川藏黑猪配套系商品猪饲养水平和饲养模式研究

Feeding Trial Study on Chuanzang Black Commercial Pig

针对川藏黑猪配套系商品猪的本质特性，采用3因子交叉试验设计，以多性状综合指数大小判定各因素最佳水平，研究其配套饲养模式，包括适宜的关键养分需要量、饲喂方式和屠宰体重。结果表明，关键养分需要量：育肥前期（20-60kg）消化能和粗蛋白分别是3250kcal／kg和16．5％，育肥后期（60kg-出栏）消化能和粗蛋白分别为3100kcal／kg和13．5％；适宜饲喂方式：前期自由采食，后期限制饲养并添加适量青绿饲料；适宜屠宰体重：90kg。按此方式饲养，川藏黑猪配套系商品猪日增重588．86g，瘦肉率59．18％，料重比3．08，肌内脂肪含量4．6％，嫩度4992．6g。

In this paper, for the essential characteristics of Chuanzang black commercial pig, the scientific feeding techniques including appropriate key nutrient requirements, feeding mode and slaughter weight were studied by using 3 factor crossover design and composite index of multiple traits to determine the best level of each factor. The results showed that the digestible energy in the pre-fattening （20 -60 kg） period and crude protein were 3250 kcal/kg and 16.5 %, respectively, and in fattening （60 kg-slaughter） period 3100 kcal/kg and 13.5 %, respectively ; The suitable feeding mode were ad libitum in pre-fattening and feed restriction with appropriate amount of green feed in fattening; Suitable slaughter weight was 90 k$. ff Chuanzartg black commercial pig reared in this way, its daily gain 588.86 g, 59.18 % lean meat, feed to gain ratio 3.08, intramuscular fat content 4.6 % and tenderness 4992.6 g.