我院畜牧场从1971年以来,每年利用预留棉田和春玉米地,种植几十亩油菜,在4月初盛花期全部割下青贮,平均亩产7,000～8,000斤,可供4～5头母猪全年的青绿饲料。青刈油菜虽非豆科牧草,而营养物质尤其是蛋白质的含量与豆科牧草相似。油菜产量又高,单位面积上的粗蛋白质收获量比苜蓿、毛苕等均高。一亩青刈油菜以7,500斤计,粗蛋白质含2.8％,共210斤;苜蓿亩产为4,000斤左右,粗蛋白质含4.5％,共180斤;毛苕亩产3,500斤,粗蛋白质含3.5％,共180斤。所以,青刈油菜是猪的好饲料。青刈油菜利用时间短, Since 1971, our livestock farms have reserved cotton fields and spring maize fields each year and planted dozens of acres of rape. In early April, all the silages were cut at full flowering stage, with an average yield of 7,000 to 8,000 kg per mu for 4 to 5 heads Pig year-round green feed. Green rape although not leguminous pasture, and nutrients, especially protein content and legumes similar. Rape yield is high, the unit area of ​​crude protein harvest than alfalfa, furrows, etc. are high. The gross weight of alfalfa is about 4,000 kg, the crude protein is 4.5%, a total of 180 kg; the ache per mu is 3,500 kg, the crude protein is 3.5% A total of 180 pounds. Therefore, green rapeseed is a good feed for pigs. Green rape use of time is short,