Geochemical Evaluation of Soil Quality in Menyuan County of Qinghai Province北大核心CSCD

青海省门源县内林草地面积大于44万公顷，耕地仅不到4.2万公顷，林草地资源丰富。2016年在门源县地区开展了1：25万土地质量地球化学评价工作，是青海省首次在大面积林草地区开展1：25万土地质量地球化学调查工作，具有较好的示范作用。通过评价土壤养分、土壤环境等级划分了土壤质量地球化学综合等级，结果表明：门源县土壤质量一等优质土壤占比92.4%,二等良好土壤占0.8%,三等中等土壤占5.6%,四等差等土壤占0.9%,五等劣等土壤占0.3%。通过项目实施可服务门源县土地资源管理，为门源县土地规划利用、农业种植结构调整及生态环境治理等提供依据，助力门源县绿色有机农畜产品输出地建设。

Geochemical evaluation of soil quality in Menyuan County, Qinghai

The area of forest and grassland in Menyuan County is more than 440000 hectares, but the cultivated land is less than 42000 hectares, which is rich in forest and grassland resources. In 2016, a 1:250000 geochemical evaluation of land quality was carried out in Menyuan County, which is also the first time that Qinghai province carried out a 1:250000 geochemical investigation of land quality in a large area of forest and grass areas, which has a good demonstration effect. The comprehensive geochemical grade of soil quality was divided by evaluating soil nutrients and soil environment grade. The results showed that the soil quality of Menyuan County accounted for 92.4% of the first-class high-quality soil and 0.8% of the second-class good soil; Third-class medium soil accounts for 5.6%, fourth-class poor soil accounts for 0.9%, and fifth-class inferior soil accounts for 0.3%. Through the implementation of the project, it can serve the land resource management of Menyuan County, provide basis for land planning and utilization, agricultural planting structure adjustment and ecological environment treatment of Menyuan County, and help the construction of green organic agricultural and livestock products export land in Menyuan County.