郑州市城市园林绿地土壤肥力调查与评价

摘要

The soil bulk density,pH value,salinity,available potassium,alkaline nitrogen,total nitrogen,organic matter and available phosphorus were measured by using the correlation coefficient method to determine the soil fertility index weight of 189 samples of urban garden green space in Zhengzhou,and the membership function model was constructed.Based on the principle of multiplication in fuzzy mathematics,the soil integrated fertility index (IFI) was calculated.The spatial distribution of soil fertility index and integrated fertility index level of Zhengzhou urban green space were obtained by spatial specific analysis using ArcGIS software which combined with soil fertility physical and chemical data.The results showed that the soil fertility of urban green space in Zhengzhou was in the middle level,the content of nitrogen and organic matter was lacking,the content of phosphorus and potassium was suitable,and the spatial distribution of soil fertility index and integrated fertility index level were in addition to the corresponding soil texture.We found it was more affected by human management measures,especially in the densely populated areas,economic administrative center of the garden green space,and the soil fertility showed a high level.%通过实测郑州市城市园林绿地189个样点的土壤容重、pH、含盐量、速效钾、碱解氮、全氮、有机质、有效磷8项肥力指标,采用相关系数法确定各土壤肥力的指标权重,构建隶属函数模型,以模糊数学中的加乘法为原理,计算土壤综合肥力指数(IFI).利用ArcGIS软件联合土壤肥力理化数据进行空间特异性分析,采用反距离权重法进行空间插值完成表面分析,获得郑州市城市园林绿地土壤肥力各项指标等级及综合肥力指数等级的空间分布规律.结果表明:郑州市城市园林绿地土壤肥力总体处于中等水平,氮及有机质含量较为缺乏,磷、钾含量适宜,各项肥力指标及综合肥力指数等级的空间分布除与相应的土壤质地有关外,更多的是受到人为管理措施的影响,尤其在人口密集区、经济行政中心区的园林绿地,土壤肥力表现出较高水平.