配方施肥是根据水稻目标产量需肥量、土壤供肥量、肥料养分含量及利用率等因素确定的。目前常用的计算公式为:肥料施用量=(水稻目标产量需肥量-土壤供肥量)/(肥料当季利用率(%)×肥料养分含量(%))操作方法如下—— Formula fertilization is based on the target yield of rice required for fertilizer, soil for fertilizer, fertilizer nutrient content and utilization factors and other factors. The most commonly used formula is as follows: fertilizer application rate = (required amount of rice target yield - soil for fertilizer) / (fertilizer seasonal utilization (%) × fertilizer nutrient content (%)) operation as follows -