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一、防肥害产生肥害的原因:一是没有根据玉米品种的特性进行施肥管理。如果高产品种施肥量较少,则不能发挥高产品种的增产潜力;低产品种如施较多的肥料,因吸收不了发生青枯倒伏产生肥害。二是没有根据土壤肥力和土壤供肥水平进行施肥管理。土壤肥力高,土壤速效养分含量大,供肥力强,施肥时应控制施肥量。反之,土壤肥力差,土壤速效养分含量低,供肥力差,施肥时应加强。三是没有根据玉米长势长相进行施肥管理。对长势强、生长旺的玉米在施肥时要控
First, prevent fertilizer fat causes: First, there is no basis for the characteristics of corn fertilization management. If the high-yielding varieties with less fertilizer, you can not play a yield potential of high-yielding varieties; low-yielding varieties such as applied more fertilizers, can not absorb the occurrence of fertility lodging due to lodging. Second, there is no fertilizer management based on soil fertility and soil fertility levels. High soil fertility, soil available nutrient content, for fertility, fertilization should control the amount of fertilizer. On the contrary, soil fertility is poor, soil available nutrient content is low, for poor fertility, fertilization should be strengthened. Third, there is no fertilizer management based on the growth of corn. On the growing strong growth of corn in the fertilizer to be controlled