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一、夏玉米需肥规律1.玉米全生育期吸收氮、磷、钾的数量据测定,每生产100千克玉米籽粒,需要吸收纯氮2～4千克,五氧化二磷0.7～1.5千克,氧化钾1.5～3.0千克。2.玉米不同生育阶段对氮、磷、钾的吸收规律玉米在整个生育期中都吸收氮肥,对氮的吸收是比较平稳的,吸收高峰在抽雄吐丝期,灌浆成熟阶段吸收速度减慢。玉米对磷的吸收在抽雄开花期达到高峰,后期吸磷下降;但玉米苗期对磷特别敏感,如果苗期缺磷,即使以后补施,也挽回不了影响。二、肥料选择1.一是选用经无害化处理后的粪尿肥、堆沤肥、绿肥、饼肥、草木灰、腐殖酸类肥料、秸秆肥等工厂化生产且标明养分含量的商品肥料。二是选用堆肥、沤肥、厩肥、沼气肥、绿肥、作物秸秆肥、泥肥、饼肥等农
First, the law of summer maize need fertilizer 1. The corn growth period absorption of nitrogen, phosphorus and potassium quantity According to the determination of each production of 100 kg of corn, need to absorb 2 to 4 kg of pure nitrogen, phosphorus pentoxide 0.7 to 1.5 kg, oxidation Potassium 1.5 to 3.0 kg. Absorption laws of nitrogen, phosphorus and potassium in different growth stages of maizeIn the whole growth period, maize absorbed nitrogen, its absorption of nitrogen was relatively stable, its absorption peak was at the stage of tasseling and its absorption was slow. The absorption of phosphorus in maize peaked in the flowering and flowering stage, while the phosphorus uptake decreased in the late stage. However, maize was particularly sensitive to phosphorus at seedling stage. Second, the choice of fertilizers 1. First, the selection of the detoxification treated manure, heap fertilizer, green manure, cake fertilizer, ash, humic acid fertilizer, straw fertilizer and other industrial production and marked nutrient content of commercial fertilizers. The second is the choice of compost, fertilizer, manure, biogas fertilizer, green manure, crop straw, fertilizer, mud and other farmers