福建浦城县耕地土壤元素地球化学评价

Geochemical evaluation of cultivated soil elements in Pucheng County of Fujian Province

福建省浦城县是水稻和薏米的重要产区,土壤环境质量和有益营养元素的含量直接影响农作物的产量和品质。基于福建省浦城县1∶5万比例尺土壤地球化学调查成果,依据相关标准和规范对研究区土壤植物生长必需营养元素、重金属环境质量和植物生长有益元素Se进行了评价,为研究区优质土地开发、特色农产品种植、高标准农田建设等提供了科学依据。评价结果表明植物生长必需大量元素有机质、N及碱解氮总体处于丰富—适中状态,P总体处于适中—缺乏状态,速效磷处于缺乏—很缺乏状态,K及速效钾含量丰富;植物生长必需中量元素S的分布情况主要以丰富—适中为主;植物生长必需微量元素Fe、B、Mn处于很缺乏状态,Mo的分布主要以很丰富—丰富为主,Zn和Cl的分布主要以很丰富—丰富为主;植物生长有益元素Se总体处于适量状态,富硒土壤面积为6.41 km^2。整体而言,浦城县土壤重金属元素达到了一等土壤环境质量标准,具备发展绿色农产品的土壤环境生态条件。

Pucheng County in Fujian Province is an important production area of rice and barley.The soil environmental quality and the content of beneficial nutrients directly affect the yield of crops and the quality of products.Based on the 1∶50,000 soil geochemical survey results in Pucheng County,the plant essential nutrient elements,heavy metal elements,and beneficial element Se in the study area were evaluated according to the relevant standards and norms,so as to provide scientific basis for the development of high-quality land in the study area,the planting of featured agricultural products and the construction of high-standard farmland.The evaluation results show that:Essential macro elements of organic matter,N and alkali-hydrolyzed nitrogen are generally in rich-moderate state;P is generally in moderate-deficient state,and rapid available phosphorus is in deficient-very deficient state.K and rapid available potassium is in abundant state.Essential moderate element S is generally in rich-moderate state.Essential trace elements Fe,B and Mn are in a state of great deficiency.Mo is generally in very rich-rich state,and Zn and Cl are also mainly in very rich-rich state.Beneficial element Se is in an appropriate state,and the soil area rich in selenium is 6.41 km2.Overall,the heavy metal elements in the soil of Pucheng County have reached the first grade soil environmental quality standard and have the ecological conditions for the development of healthy agricultural products.