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一、养分需要量玉米植株高大,对养分需求较多,其一生所吸收的养分因种植方式、产量高低和土壤肥力水平高低而异。玉米总体施肥原则是:施足基肥,轻施苗肥,巧施拔节肥,重施穗肥,酌施粒肥。一生需肥规律是:氮肥最多,钾次之,磷较少。而玉米在不同生育阶段对氮、磷、钾的吸收是不同的,一般每生产100千克籽粒需要纯氮2.5~4.4千克、五氧化二磷1.15~1.60千克、氧化钾3~4千克;氮∶磷∶钾约为2∶1∶2。
First, the nutrient requirements Corn plant tall, more nutrients, nutrients absorbed throughout his life because of planting methods, production levels and soil fertility levels vary. The overall principle of corn fertilization is: Shizujifei, light Shi Miao, Qiao Shi section fat, heavy Shi Panfei, Zhuang fertilizer fertilizer. The law of life need to be fat: nitrogen fertilizer up, potassium followed, phosphorus less. However, the absorption of nitrogen, phosphorus and potassium in corn is different at different stages of growth. Generally, 2.5-4.4 kg of pure nitrogen, 1.15-1.6 kg of phosphorus pentoxide and 3-4 kg of potassium oxide are required for producing 100 kg of grain. Nitrogen: Phosphorus: Potassium is about 2: 1: 2.