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在玉米生长过程中常有一些异常苗发生,田间出现这种情况后,应根据发生症状仔细查找原因,尽快转化以提高玉米产量和品质。1.卷叶苗。一般发生在3~4叶期,也有5~6叶期出现这种现象,玉米心叶展不开,卷成筒状,包得很紧。原因主要有:高温干旱、除草剂使用不当或遭蓟马、顶腐病的危害等造成的。在高温干旱期吸收肥水不足,会出现心叶卷成筒状的现象。不同品种间心叶卷曲的比例
In the process of corn growth often some abnormal seedlings occurred in the field, this situation should be based on the occurrence of symptoms carefully find the reasons for transformation as soon as possible to improve corn yield and quality. Volume leaflets Generally occurs in 3 to 4 leaf stage, there are 5 to 6 leaf stage of this phenomenon, the heart of corn leaves are not open, rolled into a tube, wrapped tightly. The main reasons are: high temperature and drought, improper use of herbicides or by thrips, the top rot caused by the harm. Absorption of fertilizer in high temperature and drought period, there will be a roll of heart into a tubular phenomenon. Different varieties of heart leaf curly ratio