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玉米穗期是指从拔节期至雄穗开花期,约经历30天左右。此期特点是营养生长和生殖生长并进,茎叶生长旺盛,雄穗、雌穗已先后开始分化。是玉米一生中生长最旺盛、干物质积累最快的时期。茎叶生长与穗分化之间,争夺养分的矛盾比较突出,是田间管理的最关键时期。其田间管理技术要求为:一、及时清理不良植株和分蘖玉米拔节后,因地力、肥水、病虫危害等的综合影响,不可避免地产生分
Ear of corn is from jointing to tassel flowering period, about 30 days or so. This period is characterized by vegetative and reproductive growth go hand in hand, vigorous growth of stems and leaves, tassels, ear has begun to differentiate. Corn is the most vigorous growth in the life, the fastest dry matter accumulation period. The contradiction between the growth of stems and leaves and the differentiation of spikes and the competition for nutrition is more prominent, which is the most crucial period for field management. Field management of its technical requirements: First, promptly clean up the poor plant and tillering corn after jointing, due to the combined effect of soil fertility, pests and diseases, etc., will inevitably produce points