【摘要】 <正> 本试验旨在研究能量和蛋白质水平对瘦肉型商品猪日增重及瘦肉率的影响。同时从当地主要饲料资源出发,找出一个比较经济而合理的饲粮配方。以期200日龄体重达90公斤,瘦肉率达60%以上,料肉比3.6:1。试验利用三个能量水平,二个蛋白质水平,分三个阶段于1983年7-11月在浠水县滨江农场进行。结果证明第五组水平较优,现报告如下:更多还原

【Abstract】 The effects of energy and protein levels on daily gain and lean meat per-centage were studied. 64 fattening pige from 10 Hubei white female and 6Landrace male matings were used and divided into 7 groups The trial wasconducted in three stages. Each group was given different energy and pro-tein levels during different stages. Best results were obtained during the first stage (25-45kg liveweight),feeding 3.lMeal/kg DE and 17 per cent CP; during the second stage (45-70kgliveweight), feeding 2.9Mcal/kg DE and 15 per cent CP and during the thirdstage (70-90kg liveweight), feeding 2.7Mcal/kg DE and 13 per cent CP.The daily gain was 609g, lean meat percentage 63.39 percent, consumption offeed per unit gain 3.49kg and the live-weight was up to 90kg at the age of lessthan 200 days. But differences among seven groups in daily gain, feed efficiency and per-centage of lean were not significant.更多还原