土壤肥力综合评价初步研究

Preliminary studies on the integrated evaluation of soil nutrient fertility

利 用相关分析和模 糊数学原理，选用浙 江省低丘 红壤的 ７ 项肥力指 标进行红壤 肥力的综 合评价，根据作物效应曲线建立肥力指标的隶属度函数，并计算出隶属度值⒚根据各指标 值之间的相关系数大小确定各指标的权重系数，进一步求得土壤肥力综合指 标（ Ｉ Ｆ Ｉ），并用 ３８ 个 玉米田间试验的 产量检验评价结果的可行性⒚统计结果表明 Ｉ Ｆ Ｉ与玉米产量之间达到 显著相关水平。

Based on the correlation analysis and fuzzy mathematics, the integrated evaluation of soil nutrient fertility was studied with seven indexes, organic matter, total N, available N, total P, available P, slowly available K and available K S type membership functions was developed according to their effect on plant and the function value were also calculated The weight value for the fertility indexes were calculated with the method of correlation coefficient Finally, the IFI (Integrated Fertility Index) was calculated and further tested by corn yield from 38 field experiments Results showed that INFI was significantely correlated ( P =0 05) with corn yield, and the evaluation results of integrated soil nutrient can well reflect soil fertility in some extent