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夏玉米的中后期管理是指玉米从拔节至成熟期的田间管理,包括穗期和花粒期两个发育阶段。该阶段是营养生长和生殖生长并进期,是吸收养分、水分最多的时期,也是决定穗大、粒多,实现高产的关键时期,玉米中后期管理主要抓以下几点:一、中耕除草根据土壤板结情况及杂草多少,确定中耕次数,一般应中耕2～3次。中耕时间应在苗后至大喇叭口期以前进行。注意中耕时不要伤苗断根。二、补足养分1.重视追施攻穗肥。大喇叭口期追施氮肥,可有效促进果穗小花分化,实现穗大粒多。穗肥以速效氮肥为好。可根据地力、苗情等情
Mid-late summer maize management refers to the maize field management from jointing to maturity, including the two stages of development of the panicle and the pollen stage. This phase is vegetative and reproductive growth and progress, is the time to absorb nutrients, water is the most, but also determine the spike, grain and more to achieve high yield of the critical period, the latter part of the management of corn mainly focus on the following: First, weeding according to the soil Plate knot conditions and how much weeds, determine the number of cultivation, the general should cultivate 2 to 3 times. Sowing time should be in the seedling to big bell mouth period before. Pay attention to cultivated seedlings do not cut off roots. Second, make up nutrients 1. Pay attention to topdressing panicle fertilizer. Large trumpet chaser nitrogen, can effectively promote the ear floret differentiation, to achieve large grain size. Spike fertilizer to quick-acting nitrogen is better. According to fertility, Miao Qing situation