The results of grey relational analysis revealed that the content of soil nutrients, in particular C and N, had a major effect on avail-P.

灰色分析的结果表明，土壤速效磷的形成主要受到土壤养分，尤其是碳、氮养分的影响。

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After analyzing the existing situation of sewerage drainage using the Grey System, a Grey model GM (1, n) is proposed by the optimization of the context value and the coefficient of the model.

在分析污水排放数据处理的现状后，运用灰色系统理论，通过优化模型系数与背景取值，建立了多因素灰色GM (1, N)模型。

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