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在玉米生产上,人们往往认为玉米果穗枯白即可收获了,其实不然。对一些紧凑型玉米,例如成单14、川单13、掖单12、掖单13和掖单20号等当前各地推广种植的几个紧凑型玉米而言,这些品种有早白皮、晚成熟的“假熟”现象,收获过早往往会造成玉米减产,试验证明,减产幅度多在8.50%~12.10%。玉米完熟的特征是:当田间95%以上的玉米植株茎节变黄,果穗的苞叶枯白且松散,籽粒内含物完全硬化,指甲不易掐破。由于紧凑型玉米是由外向里成熟,因此,其收获期应在苞叶全部变黄、已开始干枯,茎叶普遍变黄时为好。试验证明,紧凑型玉米在最佳时期收获,
In corn production, people often think that the ear of corn can be harvested dry, but it is not. For some compact maize varieties now popularized in some compact maize, such as Chengdan 14, Chuandan 13, Yedan 12, Yeda 13 and Yedan 20, these varieties have early white skin and late mature “False cooked ” phenomenon, premature harvest will often result in corn yield reduction, test proved that the reduction rate of more in 8.50% ~ 12.10%. The characteristic of corn ripening is that when more than 95% of the corn plants in the field turn yellow, the bracts of the ears are withered and loose, the contents of the kernel hardens completely, and the nails are not easily broken. As compact corn is matured from the outside to the inside, its harvest should be yellowed all of the husk, has begun to dry, yellowing when the leaves are generally good. Experiments show that compact corn harvested in the best period,