1玉米的需肥量和需肥规律玉米是一种高产作物,植株高大,根系发达,吸肥力强,需要养分多。生产100kg玉米籽粒,需要吸收氮2.0~4.0kg、五氧化二磷0.7~1.5kg、氧化钾1.5~4.0kg。玉米吸收养分的数量和比例不同的原因主要是由于品种特性、土壤条件、产量水平以及栽培方式不同,在确定具体施肥量时,要综合分析考虑。玉米不同生育阶段,对养分的吸收数量和比例变化很大。玉米苗期植株小、生长慢,对养分吸收的数量少,速度慢。拔节、孕穗到抽穗开花期,是玉米营养生长和生殖生长同时并进的阶段,生长速度快,吸收养分 1 corn needs fertilizer and fertilizer law corn is a high-yielding crops, tall plants, developed roots, strong absorption of fertility, the need for more nutrients. Production of 100kg corn seeds, need to absorb nitrogen 2.0 ~ 4.0kg, phosphorus pentoxide 0.7 ~ 1.5kg, potassium 1.5 ~ 4.0kg. The reasons for the different amounts and proportions of nutrient uptake by maize are mainly due to the characteristics of cultivars, soil conditions, yield levels and cultivation methods. When determining the specific amount of fertilizer, it is necessary to comprehensively analyze and consider. Maize different growth stages, the absorption of nutrients and the proportion of large changes. Corn plantlets small, slow growth, the amount of nutrient absorption, slow. Jointing, booting to the flowering stage is the corn vegetative and reproductive growth at the same time the stage, rapid growth, nutrient uptake