望谟县石屯镇油茶基地土壤质量综合评价

为研究望谟县石屯镇油茶基地土壤质量,做出较为全面的土壤质量综合评价。选取土壤有机质、全氮、全磷、碱解氮、速效磷、速效钾作为有效养分的指标参考贵州第二次土壤普查分级标准,用土壤养分模糊综合评价法评价,另选取7种重金属(镉、铬、铅、汞、砷、铜、锌)作为污染指标结合单因子污染指数法(PI)、内梅罗综合污染指数法进行评价。最后结合养分指标和污染指标利用SQI综合指数法进行综合评价。结果表明:土壤有机质、全氮、全磷含量较为丰富,碱解氮和速效磷含量较次。油茶基地土壤养分综合指标平均值0.73,中等。重金属含量中所有样品都达到了"清洁"等级;综合污染指数为0.676,处于"清洁"水平。土壤综合质量指数为0.776,属于高等水平。当地应发展清洁农业,保证油茶产量,防治结合确保油茶质量安全。

Comprehensive Evaluation of Soil Quality in Oil Tea Base at Shitun town,Wangmo County,Guizhou Province

In order to study the soil quality of oil tea base in Shitun Town, Wangmo County, a comprehensive evaluation of soil quality was made.Soil organic matter, total nitrogen, total phosphorus, available nitrogen, available phosphorus and available potassium were used as indicators of effective nutrient reference according to the Second Provincial Survey for Soil Classification Standards.The soil quality was evaluated by fuzzy comprehensive evaluation method of soil nutrient.Seven kinds of heavy metals (cadmium, chromium, lead, mercury, arsenic, copper and zinc) were evaluated as the pollution index combined with the single factor pollution index (PI) and the Nemero comprehensive pollution index method.Finally, the SQI comprehensive index method was used to evaluate the nutrient index and pollution index.The results showed that soil organic matter, total nitrogen and total phosphorus were abundant, and the contents of available N and available P were the next.The average soil nutrient comprehensive index in the oil tea base was 0.73, indicating medium level.Heavy metals in all samples have reached the "clean" level.Comprehensive pollution index was 0.676, at the "clean" level.The soil comprehensive quality index was 0.776, which belongs to the high level.Local farmers should develop green agriculture to ensure oil tea yield, while, guarantee the quality safety of Camellia by the combination of control and treatment.