【摘要】 本文通过试验证明了栽培玉米增施化学肥料既可以提高粮食单产,又可随着粮食产量的增加而增多玉米根茬的数量。玉米根茬留在土壤里既有利于保持耕地土壤的生态平衡,又可改善土壤的肥沃状况,历来认为玉米只是“耗地”作物的传统观念值得商榷。试验还证明玉米根茬数量远比大豆根茬为多,这也说明玉米在农田生态中的重要地位。更多还原

【Abstract】 Experiment showed that fertilizer application could increase not only the yield of maize but also the quantity of Its roots.This benifits the ecological balance of soil.It was also found that the quantity of maize roots was much more than that of soybean, which indicates that maize plays an important role in the ecosystem of farmland.更多还原