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肥料是作物高产的物质基础。合理施用有机肥料和化学肥料,对提高土壤肥力,供给作物营养起着重要作用。据统计,近二十多年来世界粮食产量增加近一倍,化学肥料对增产效果约占30—60%。一般是哪里肥料多、用得合理,哪里就增产幅度大。但施肥贵在合理,正确的施肥可以调节营养、提高肥力,获得丰产。反之,某种营养供应过多或不足,会造成养分的比例失调,障碍作物的正常生长发育,出现“营养过量”或“饥饿”症状。要做到施肥合理,必须认真研究作物、土壤、肥料之
Fertilizer is the material basis for crop yield. Rational use of organic fertilizers and chemical fertilizers play an important role in improving soil fertility and supplying crop nutrition. According to statistics, world grain output nearly doubled in the past two decades and chemical fertilizer accounts for about 30-60% of the increase in production. Where are the general fertilizers, used properly, where the rate of increase large. However, fertilization is more reasonable and proper fertilization can regulate nutrition, improve fertility and obtain high yield. Conversely, if there is too much or too little nutrient supply, it will cause the imbalance of nutrients and the normal growth and development of crops and the symptoms of “overnutrition” or “starvation”. To achieve reasonable fertilization, crop, soil and fertilizer must be carefully studied