玉米产量高,用途广,易栽培.是世界重要的粮食作物和饲料作物.目前世界玉米的播种面积仅次于小麦和水稻居第三位,而总产量仅次于小麦居第二位,单产居第一位,大大超过其他粮食作物和饲料作物.预测玉米在粮食作物和饲料作物中的比重将继续增大.近些年来,随着农作物育种和栽培技术的提高,在玉米栽培中出现了许多新的特点和发展趋 It is the most important grain crops and forage crops in the world.At present, the sown area of ​​corn in the world ranks third only to wheat and rice, while the output of corn is second only to that of wheat, yield per unit area Ranking the first place, far exceeding other food crops and fodder crops.It is predicted that the proportion of maize in food crops and forage crops will continue to increase.In recent years, with the improvement of crop breeding and cultivation techniques, there appeared in maize cultivation Many new features and trends