水稻测土配方施肥要掌握以土定产、以产定肥、因缺补缺、有机无机相结合、氮磷钾平衡施用的原则。一是要测土。测土是测土配方施肥的前提,通过对土壤养分分析测定,较准确地掌握土壤养分状况及供肥性能,为配方施肥提供科学依据。二是制定配方。配方是施肥的关键。在测土的基础上,根据土壤特 Rice soil testing and fertilizer to master the production of soil to produce fat, due to lack of fill, organic and inorganic combination, the principle of balanced application of nitrogen, phosphorus and potassium. First, to test the soil. Soil testing is the premise of soil testing and formula fertilization. Through the analysis of soil nutrients, soil nutrient status and fertilizer performance can be accurately grasped to provide a scientific basis for formula fertilization. The second is to formulate. Formula is the key to fertilization. On the basis of soil testing, according to soil characteristics