论玉米连作

玉米是一种高产作物,适应范围广,随着人口增多对粮食的需要,玉米栽培面积不断扩大,势必造成连作现象。经我们多年研究,玉米适当连作并不减产;由于根茬还田和秸秆还田,土壤肥力也不会因玉米连作而下降。应充分发挥玉米在农田生态中的积极作用,保持地力常新,改进裁培技术,不断提高玉米的产量。

STUDIES ON CONTINUOUS CROPPING OF MAIZE

Maize is a high—yielding and vast—adaptive crop. As population increases, the demand for grain has been stimulating more and more cultivation of maize, which cer tainly has resulted in the continuous cropping of the crop. After years of investigation, it was found that continuous cropping of maize did not cause a decrease of grain yield in maize and that the soil fertility was not deteriated from continuous cropping of maize, because the stubbles and stalks could be returned to the field. Therefore, full use should be made of the positive effect of maize in the agroecological system and efforts be made on soil conservation and improved cultural practices, to increase grain yield of maize per unit area.