新安江上游山间盆地区农用地土壤地球化学特征及土壤质量评价
Soil geochemical characteristics and soil quality evaluation of agricultural land in the intermountain basin area in the upper reaches of Xin'an River
-
摘要: 为评价新安江上游山间盆地区农用地土壤质量，分析影响土壤质量的主要因素，服务于当地农业发展和新安江流域生态保护补偿机制改革，根据《土地质量地球化学评价规范》中规定的方法，对研究区土壤质量进行评价，并运用相关性分析和主成分分析的方法探索土壤中各组分的来源。结果表明：（1）研究区大部分区域土壤的环境等级为无风险，西北部碳酸盐岩分布区和黑色岩系分布区存在大面积土壤的环境等级为风险可控，土壤中Cd元素的含量是影响环境等级的主要因素；（2）研究区土壤的养分等级以中等为主，较丰富、较缺乏次之，丰富和缺乏均极少，土壤中有机质的含量是影响养分等级的重要因素；（3）部分地区土壤中Cd元素含量偏高的主要原因是铁锰结核和有机质的吸附。（4）研究区内的土壤质量整体上较好，比较适合开展农业生产，可以针对研究区酸性土壤面积大，土壤养分丰富区面积小，部分区域土壤中Cd含量较高的特点，对土壤进一步改良，以提高农产品的产量和质量。Abstract: In order to evaluate the soil quality of agricultural land in the intermountain basin area in the upper reaches of Xin'an River, analyze the main factors affecting soil quality, and serve the local agricultural development and the reform of ecological protection compensation mechanism in Xin'an River basin, the soil quality in the study area was evaluated according to the method stipulated in the Specification of Land Quality Geochemical Assessment, and correlation analysis and principal component analysis were used to explore the source of each component in soil. The results show that: (1) The environmental grade of soil in most areas of the study area is risk-free, and the grade in carbonate and black rock series distribution areas in the northwestern of the study area is risk-controllable. The content of Cd element in soil is the main factor affecting the environmental grade. (2) The nutrient levels of soil in the study area were mainly medium, followed by rich and deficient soil, and the content of organic matter in soil was an important factor affecting the nutrient levels. (3) The main reason for the high content of Cd in soil in partial region is that was adsorbed by iron and manganese nodules and organic matter. (4) The soil quality in the study area is pretty good, which is suitable for agricultural production on the whole. According to the characteristics of large acid area, lack of highly-rich nutrient area and high Cd content in some areas in the soil of the study area, the soil can be further improved to increase the yield and quality of agricultural products.
-
计量
- 文章访问数: 943
- HTML全文浏览量: 2
- PDF下载量: 70
下载:
