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采用产量分解的方法，运用灰色系统中的GM（1．1）模型，对梯田的趋势产量和水保产量进行灰色拼合，确定了我区水平梯田、坡式梯田的水保产量及其效益分摊系数。
Using the method of yield decomposition, using the GM (1.1) model in gray system, the trend yield and the yield of water and soil conservation in terraced fields are grayed together, and the yield of water and soil conservation and benefit apportionment of horizontal terraces and slope terraces in our district are determined coefficient.