1粗纤维量不可过高。生长肥育猪料的粗纤维为3%—4%,要选用粗纤维含量低的原料,不可过多使用米糖、稻谷等粗纤维量高的原料。2蛋白质水平要保证。瘦肉型猪体组织中的蛋白质比例高,其15—30kg体重日粗蛋白质水平在17.5%,30—60kg体重为16.5%,60千克重出栏阶段为15.0%。另外还往往需要添加氨基酸0.10%—0.15%,蛋氨酸0.05%—0.08%。3营养平衡很重要。规模化猪场群饲养密度高又缺乏日光照射和青饲料,许多天然微量成分不能自行获 1 The amount of crude fiber can not be too high. Growing and finishing pig raw fiber is 3% -4%, to use low crude fiber content of raw materials, not too much use of rice sugar, rice and other raw materials of high crude fiber. 2 protein level to be guaranteed. Lean meat type pig body protein in a high proportion of its 15-30kg body weight daily crude protein level of 17.5%, 30-60kg body weight of 16.5%, 60kg heavy column stage of 15.0%. Also often need to add amino acids 0.10% -0.15%, methionine 0.05% -0.08%. 3 Nutritional balance is important. Large-scale pig farms are stocked with high density and lack of sunlight and green fodder, many of the natural trace elements can not be obtained by themselves