基于GIS的天全县东部土壤质量定量评价

The Quantitative Evaluation of Cultivated Soils Quality in the Eastern Part of Tianquan County Based on GIS

结合GIS技术方法,利用修正的内梅罗公式作为土壤质量的评价模型,研究了天全县东部土壤质量的空间分布特点,以及对天全县东部土壤质量进行了定量化的评价。结果表明,该区域速效氮以差级水平为主,全氮、速效磷、速效钾、有机质和pH以中等级至良好级为主,综合肥力质量属于中等水平。人类活动是影响全县东部土壤质量空间分布的最根本原因,其次是地势与土地利用方式。

This article employs the revised formula Nemero as the evaluation model of soil quality, mixing GIS technology with traditional statistical method and geostatistics method, and studies the soil quality spatial distribution of eastern part of Tianquan County, as well as the quantitative evaluation of cultivated soils quality. The results show that the available nitrogen is mainly lower level; total nitrogen, available phosphorus, potassium, organic matter and pH are mainly of medium level; the quality of integrated soil fertility are the middle class. Human activities are of the underlying causes of the soil spatial distribution in the eastern part of Tianquan County, and the following reasons are topography and way of land use.