江西省寻乌县长宁-吉潭地区土壤养分地球化学评价及影响因素分析

Study for Geochemical Evaluation and Influencing Factors of Soil Nutrients in Changning-Jitan Area,Xunwu County,Jiangxi Province

为了研究有机质对养分元素全量与有效量的影响,通过分析寻乌县长宁吉潭地区土地质量地球化学调查数据,对土壤中氮、磷、钾、硒的含量进行等级评价。结果表明:研究区氮、磷、钾、硒含量均大于全国土壤背景值;土壤养分地球化学综合等级以中等为主,富硒土壤面积占总面积的58.61%;有机质对土壤养分元素的含量影响显著,其与氮、磷、钾、硒全量存在不同程度的正相关关系,与碱解氮、有效磷、速效钾、有效硒呈极显著正相关关系。该研究结果可为农业精准施肥和富硒土壤资源的合理开发利用提供科学依据。

The effects of organic matter on the total and effective contents of nutrient elements were studied by analyzing the data of land quality geochemistry in Changning-Jitan area,Xunwu county,China.The results show that the contents of nitrogen,phosphorus,potassium,and selenium in the study area are higher than the national soil background value in China.The comprehensive grade of soil nutrient geochemistry is mainly medium,and the area of selenium-rich soil accounts for 58.61% of the total area.Organic matter has a significant impact on the content of soil nutrient elements.Organic matter has a positive correlation with the total amount of nitrogen,phosphorus,potassium and selenium in varying degrees,and has a very significant positive correlation with alkali hydrolyzable nitrogen,available phosphorus,available potassium and available selenium.This research provides a scientific basis for agricultural precision fertilization and the rational development and utilization of selenium rich soil resources.