贵州省石阡县耕地土壤硒元素地球化学特征及开发利用建议

Geochemical Characteristics and Suggestions for Its Development and Utilization of Surface Soil Selenium in Shiqian County,Guizhou Province

通过对石阡县耕地质量地球化学评价研究显示,土壤中硒元素总体平均含量为0.38 mg/kg,硒含量变化范围为0.078.35 mg/kg;石阡县898300亩耕地中共圈定富硒区243410亩,清洁富硒区240401.29亩,主要集中分布在本庄、龙塘、龙井、青阳、石固、聚凤、河坝等七个乡镇,清洁富硒区主要成土母岩为二叠系吴家坪组灰岩、煤炭质页岩和寒武系牛蹄塘组碳质页岩土壤中;共划分了龙塘-龙井富硒茶叶及茶山观光园区、山口坳-永和富硒茶叶、富硒水果优先开发区、马屯-聚凤富硒水稻、蔬菜、茶叶优先开发区、朝阳-新丰富硒水果种植区四个富硒优先开发区。

According to the geochemical evaluation of cultivated land quality in shiqian county,the overall average content of selenium in the soil is 0.38 mg/kg,and the variation range of selenium content is 0.078.35 mg/kg.According to the evaluation standard of soil selenium-rich soil,shiqian county has defined a total of 243410 mu of selenium-rich areas and 240401.29 mu of clean selenium-rich areas.Mainly concentrated in this zhuang,longtang,longjing,qingyang,shigu,jufeng,heba and other seven towns,The main parent rocks in the clean selenium-rich area are the limestone of the wujiaping formation of Permian,the coal shale and the carbon shale soil of the niuitang formation of Cambrian.According to the traffic location,soil environment,fertility,selenium-rich intensity and other parameters four se-rich priority development zones are divided into longtang-longjing se-rich tea and tea mountain sightseeing park,shankou ao-yonghe se-rich tea,se-rich fruit priority development zone,matun-jufeng se-rich rice,vegetables,tea priority development zone,and chaoyang new-rich se-rich fruit planting zone.