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配方施肥的方法很多,地力差减法是其中一种,它的计算方法介绍如下: 计划施肥量(kg/667m~2)=作物目标产景所需养分总量-土壤供肥量/肥料中养分含量(％)×肥料利用率(％) 地力指土壤肥力,用产量作为指标。 1 作物目标产量的确定 以前三年的平均产量或前三年中产量最高而气候等自然条件较正常的那一年的产量,再提高10％～15％,作为当年的目标产量,它是肥料定量最原始的依据。 2 作物目标产量所需养分总量的确定 作物目标产量所需养分总量(kg/667m~2) =作物单位产量养分吸收量×作物目标产量
There are many ways to formulate fertilizers, one of which is the difference in soil fertility. The calculation method is as follows: Planned fertilization (kg / 667m ~ 2) = total nutrients needed for crop production Content (%) × Fertilizer utilization (%) Soil fertility refers to the soil fertility, using the yield as an indicator. 1 Crop Target Production Output The average output of the previous three years or the highest yield in the first three years while the natural conditions such as climate are normal then increase by 10% to 15%. As the target production of the year, it is a fertilizer Quantitative most primitive basis. 2 crop target yield of the total amount of nutrients required to determine the total target crop yield of nutrients required (kg / 667m ~ 2) = yield of crop nutrients absorption × crop target yield