海南乌石农场橡胶园地力评价与土壤养分空间分布特征

Fertility Evaluation and Spatial Distribution Characteristics of Soil Nutrients of Rubber Plantations in Hainan Wushi Farm

为给海南垦区乌石农场橡胶园土壤的合理施肥与养分管理提供决策依据,以该地土壤养分为研究对象,在GIS技术支持下建立海南垦区乌石农场橡胶园信息数据库,运用模糊数学、特尔菲法、层次分析法、综合指数法和累积曲线法等分析了橡胶园耕地质量和土壤养分指标的空间变异规律。结果表明:乌石农场橡胶园的地力水平可划分为5个等级,地力处于二、三等级的橡胶园占79%,地力水平总体中等偏上,但各个等级橡胶园空间分布比较分散,基本上在各个生产队都有分布;乌石农场橡胶园土壤酸性很强,土壤有机质、全氮、有效磷、速效钾和交换性钙镁的含量总体水平低。

To provide a decision basis for rational fermentation and nutrient management of soil in rubber plantations in rubber plantation in Hainan Wushi Farm,taking the soil nutrients as the research object,the fertility evaluation and spatial characteristics of soil nutrients were studied by using many methods such as fuzzy mathematics,Delphi method,analytic hierarchy process,comprehensive index method and cumulative curve methods etc.Results：the soil fertility levels of rubber plantations in Wushi Farm could be divided into five grades,the second and third grades accounted for 79％ and the soil fertility level was above the average grade.However,the spatial distribution of each grade rubber plantation was more dispersed basically,and had distribution in every production team; the soil acidity of rubber plantation was very strong and soil organic matter,total nitrogen,available phosphorus,available potassium and the concentrations of exchangeable calcium and magnesium were at a lower level in general