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麦玉米稻三熟是针对苏南地区近10年来粮食生产徘徊不前、饲料不足、畜牧业生产发展缓慢等问题而提出的一种新的种植方式．研究和生产实践表明，麦玉米稻三熟的土地生产力和经济产出均比现行的麦稻两熟制提高20－25％．但是实行麦玉米稻三熟制，从农田中带走的养分比稻麦两熟要?
Three crops of wheat and maize rice are a new planting method proposed for the problems of food production stagnation, insufficient feedstuff and slow production of livestock husbandry in southern Jiangsu in the past 10 years. Research and production practices show that both land productivity and economic output of wheat, maize and rice increase by 20-25% over the current two-cropping system. However, the implementation of three lines of wheat corn, corn, wheat and wheat from the farm to bring more nutrients than rice and wheat to?