论文部分内容阅读
玉米常见的生理病害有空秆、秃尖、倒伏等,生产实践中常造成严重的损失。玉米生理病害是由多种因素造成的,但归纳起来可分为两类,第一类是内部因素,即遗传因素的影响,如品种抗逆性不强,种子生活力弱,种子发育不健全。第二类是外界环境条件,如土壤、肥料、水分、空气与光照等条件不良,阻碍玉米的正常发育,形成生理病害。现将玉米生理病害发病症状与防治方法介绍如下。一、玉米空秆1.发病症状玉米空秆是指植株不结果穗或有果穗而无籽粒。目前
The common physiological diseases of corn are stalks, bald tips, lodging, etc., and often result in serious losses in production practice. Physiological diseases of maize are caused by many factors, but they can be summed up into two categories. The first category is internal factors, that is, the influence of genetic factors. For example, the resistance of varieties is not strong, the seed vitality is weak and the seed development is not perfect . The second category is the external environmental conditions, such as soil, fertilizer, moisture, air and light and other poor conditions, hinder the normal development of corn, the formation of physiological diseases. Now physiological symptoms of corn disease and prevention methods are described below. First, the corn stalks 1. Morphological symptoms of corn stalks refers to the plant does not result in ear or ear and no grain. Currently