河北省张北县土地质量地球化学调查评价—以台路沟乡为例

为助力河北省张家口市张北县脱贫攻坚,基于台路沟乡土地质量调查数据,分析了该乡土壤元素地球化学特征,划分了土壤地球化学等级、灌溉水等级,以及土地质量地球化学等级。养分元素主要较缺乏磷及速效钾、硼、铜、硒。土壤环境地球化学综合评价等级以一等无风险区为主,占总面积的98.88%。二等风险可控区占总面积的1.12%,主要是受Ni元素的污染影响。约97.49%的面积符合绿色食品产地环境质量标准,具有开发绿色食品的巨大潜力。灌溉水各元素均处于限量标准以下,为优质灌溉水。土地质量地球化学等级以良好级质量为主,占总面积的66.46%;优质级区占总面积的18.57%,中等级占总面积的14.97%,无差等、劣等级。相关成果可为张北县土地利用规划、水源涵养功能区和生态环境支撑区建设、资源环境承载力评价和国土空间适宜性评价提供基础资料。

Geochemical assessment for land quality in Tailugou, Zhangbei County of Hebei Province

Based on the investigation data of land quality in Tailugou, Zhangbei County of Hebei Province, the geochemistry characteristics of soil element were analyzed, and the geochemistry grades of soil, irrigation water, and the quality of the land were classi.ed. The main nutrient elements are lack of phosphorus and available potassium, Boron, copper and selenium. The comprehensive evaluation grade of the geochemistry is mainly the .rst-class risk-free zone, accounting for 98.88% of the total area. The second-class risk controllable area accounts for 1.12% of the total area, which is mainly a.ected by Ni contamination. About 97.49% of the area meets the environmental quality standards of green food producing areas, which has great potential to develop green food. All the elements of irrigation water are below the threshold value, so it is high quality irrigation water. The grade of land quality is mainly good grade, which accounts for 66.46% of the total area, and the area of high quality grade accounts for 18.57%, the area of middle grade accounts for 14.97%, no poor and inferior grade. The result can provide basic data for land use planning, construction of water conservation area and ecological environment supporting area, evaluation of resource and environment carrying capacity, and evaluating suitability of spatial development and construction in Zhangbei County.