富硒区土壤养分质量评价:以陕西省紫阳县闹热村为例

为在典型富硒土壤分布地区科学种植和大力发展绿色富硒农产品,选取陕西省紫阳县闹热村为研究区,进行土壤养分质量评价。共采集138件表层土壤样品,测试分析了氮、磷、钾等植物营养元素以及土壤有机质、pH等16项指标。结果表明:(1)研究区硒资源丰富,表层土壤硒元素含量范围在0.50~25.30 mg/kg之间,平均含量为3.85 mg/kg;(2)研究区表层土壤为中性—弱碱性土壤,其中的大量元素和中量元素整体达到丰富及以上水平,锌、铜等微量元素和土壤有机质较缺乏;(3)研究区表层土壤养分综合等级均达到了三级及以上水平,土壤养分情况整体良好。该研究成果对于推动当地富硒产业经济发展具有重要的意义。

Evaluation of Soil Nutrient Quality in Selenium-rich Area: A Case Study of Naore Village,Ziyang County,Shaanxi Province

In order to plant and further develop selenium-rich agricultural products in a scientific way, we investigated the soil nutrient quality evaluation of Naore village in Ziyang County, Shaanxi Province. In our research, a total of 138 surface soil samples were collected, and 16 indexes of plant nutrients such as nitrogen, phosphorus and potassium, soil organic matter and pH were determined. The research results show that: (1)the study area is rich in selenium resources and the content of selenium in the surface soil ranges from 0.50 to 25.30 mg/kg, and the average content is 3.85 mg/kg; (2) the surface soil is neutral to weakly alkaline soil, in which macro and moderate elements are abundant or above on the whole, while trace elements such as zinc and copper and soil organic matter are deficient; (3) the comprehensive nutrient level of the surface soil reached level 3 or above, and the overall nutrient status of the soil was qualified. This study is of great significance for promoting the economic development of local selenium-rich industries.