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以田间试验所设的缺素区产量代替无肥区产量 ,所建立的定产式更接近实际 ,增加了土壤供肥量的计算量 ,减少施肥量。缺素区产量及其养分吸收量是计算土壤供肥量、土壤有效养分校正系数和相对产量等的基础参数。文中讨论的确定土壤供肥量的三种方法精度均较高 ,吻合度均大于 90 %。使平衡施肥建议施肥量达到定量水平
In order to replace the no-fat zone yield with the yield of the deficient zone set up in the field experiment, the established yield formula is more realistic, increasing the amount of soil available for calculation and reducing the amount of fertilizer applied. The yield and its nutrient uptake in the deficient area are the basic parameters for calculating soil available fertilizer, soil active nutrient correction coefficient and relative yield. The accuracy of the three methods discussed in the paper to determine the amount of soil available for fertilizer is high, and the agreement is greater than 90%. Balance fertilization recommended amount of fertilizer to achieve quantitative levels