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近年来,几乎每年在不同地区都出现玉米空杆现象,一般田块因空杆减产5%-10%,严重的可达20%以上。因而,降低空杆率是提高玉米产量的一项重要措施。一、产生原因1.种子原因因种子纯度差、整齐度不够,自交苗多、田间管理不均匀一致,生长整齐度差,小苗、自交苗竞争力弱,发育差、空秆多。2.不利的气候因素2.1高温干旱玉米大喇叭口至抽穗前是玉米需水最多的时期,即玉米需水临界期,此时缺水干旱,就会影响玉米
In recent years, almost every year in different regions have appeared corn empty bar phenomenon, the general field due to empty rod cut 5% -10%, serious up to 20% or more. Therefore, reducing the empty bar rate is an important measure to increase corn production. First, the causes 1. Seeds due to poor seed purity, not enough regularity, self-seedlings and more, field management is not uniform, poor uniformity of growth, seedling, self-spurlets competitiveness is weak, poor development, empty stalks and more. 2. unfavorable climatic factors 2.1 high temperature and drought of corn trumpet to corn before heading is the most water-demanding period, that critical period of water demand for maize, then dry and drought, it will affect the corn