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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。例如掖单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。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9.75～13.64%。而平展型品种,如沈单7号、鲁玉6号和丹玉13号等玉米,其适宜的收获时间为完熟期。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,籽粒内含物硬
In corn production, people often think that the ear of corn can be harvested dry, but it is not. For example, YEDA 12, YEDA 13 and YEDA No. 20 are popularizing several compact corn crops. These varieties have early white, late mature “false cooked ” phenomenon, premature harvest will often result in corn cut. Test proved that more than 9.75 to 13.64% reduction in output. The flat type, such as Shen No. 7, Luyu 6 and Dan Yu 13 and other corn, the appropriate harvest time for the maturity. Corn is characterized by maturity when more than 95% of corn plants in the field turn yellow stems, ear bracts blight white and loose, hard kernel content