偃师市首阳山镇寺里碑、龙虎滩等村,连年来,大面积搞棉田套种洋葱,使这里的农民走上了致富道路。他们在生产实践中,总结出棉葱套种有四大好处:①经济效益高。一般亩产皮棉80—90公斤,较单作棉田增产25％左右。洋葱亩产1750—2000公斤。两项亩产值在1300—1600元左右。②共生期短。洋葱3月上旬栽植, Yanshi Shouyangshan Temple temple monument, Longhu Beach and other villages, over the years, a large area of ​​cotton fields intercropping onions, so that farmers here embarked on a road to prosperity. In their production practice, they concluded that there are four major advantages of cotton onions: ① high economic returns. General per capita lint 80-90 kg, an increase of about 25% more than cotton. Onion per mu 1750-2000 kg. Two mu output value of 1300-1600 yuan. ② symbiotic period is short. Onions planted in early March,