摘要
选择土壤粘粒含量、容重、pH、有机质、全氮、全磷、全钾、碱解氮、有效磷、有效钾这10个指标,采用模糊数学方法确定其隶属度函数并进行处理,运用主成份分析法确定各指标的权重,计算土壤肥力综合指标值(IFI),对城乡结合部蔬菜用地土壤肥力进行模糊评价。根据评价结果,提出低肥力土壤地区应该加大有机肥的投入,根据蔬菜生长需要,适量补充磷肥,针对性的施用氮肥和钾肥的施肥建议。
soil clay content, bulk density, pH, organic matter, total nitrogen, total phosphorus, total potassium, available nitrogen, available phosphorus, available potassium these 10 indicators are selected to build model by fuzzy mathematical method to determine their membership function and process. The weight of each indicator was built by PCA. And Integrated Fertility Index （IFI） can be calculated by this model. The application suggestion including raising organic fertilizer amount for lower fertility soils, applying phosphorus fertilizer in the right amounts during the growth period of crops, and Targeted application of nitrogen and potash fertilizer is put forward according to the evaluation results of soil fertility.
出处
《中国农学通报》
CSCD
北大核心
2010年第7期137-141,共5页
Chinese Agricultural Science Bulletin
关键词
蔬菜用地
土壤肥力
模糊评价
城乡结合部
vegetable plot
soil fertility
fuzzy evaluation
urban-rural marginal area
