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玉米和一般农作物不同,它是雌雄同株异花作物,但其不同生育阶段养分的分配规律和一般农作物一样。据田治心等试验,玉米在拔节前营养物质的分配比例、根、茎、叶占83%,雄花占17%,拔节至雌穗开始分化,进入平衡状态,根、茎、叶占5%,雌雄穗占50%,当雌穗进入小穗,小花分化期,根、茎、叶及雄穗占50%,雌穗独占50%,到抽雄时就打破了平衡,输入到雌穗的养分占70%,下余30%绝大部分为雄穗所消耗。因此,去掉雄穗就减少了养分的消耗,可促使穗大粒饱,这是去雄能够增产的理论基础。
Corn is different from other crops in general. It is a monoecious allotrophic crop. However, the distribution of nutrients at different stages of growth is the same as that of the general crop. According to Tian Zhixin and other experiments, corn before jointing the distribution of nutrients, roots, stems and leaves accounted for 83%, male flowers accounted for 17%, jointing to the ear began to differentiate into balance, roots, stems and leaves accounted for 5% , Male and female accounted for 50%, when the spike into the spikelets, floret differentiation, roots, stems, leaves and tassels accounted for 50%, 50% exclusive ear, tassel to break the balance, the input to the ears of the nutrients accounted for 70 %, The remaining 30% most of the tassel consumption. Therefore, the removal of the tassel reduces the consumption of nutrients, can promote large grains, which is the theoretical basis for the male to increase production.