一、玉米需肥特点玉米为本地常栽种作物,一生肥料需求量大。需肥比例为氮肥需求量最大,其次为钾肥、磷肥。据调查:平均每生产100千克籽粒,约需从土壤中吸收氮2.5千克,磷1.2千克,钾2千克,需肥比例为1∶0.5∶1。不同时期玉米需肥量各不相同。其中,苗期仅占10%左右。而拔节至抽雄期,对氮磷钾肥的需求量基本达到高峰期。此期,需 First, the characteristics of corn to be fertilizer Corn is often planted locally for the crop, a lifetime demand for fertilizer. Fertilizer needs the largest demand for nitrogen fertilizer, followed by potash, phosphate fertilizer. According to the survey: an average of 100 kg of grain per kilogram, about 2.5 kg of nitrogen to be absorbed from the soil, phosphorus 1.2 kg, potassium 2 kg, fertilizer ratio required 1: 0.5: 1. Maize at different times need different amounts of fertilizer. Among them, the seedling only accounts for about 10%. The jointing to tasseling, the demand for nitrogen, phosphorus and potassium basically reached its peak. This period, need