赣南地区土壤pH值分布的影响因素及其强度变化

[目的]研究赣南地区土壤pH值的影响因素和强度,为该区土壤酸化防治提供科学依据.[方法]以江西省赣州市南康区8 167组表层土壤为研究对象,利用卡方检验、相关系数等统计学方法,对土壤pH值分布特征及影响因素进行分析.[结果]研究区83.1％的土壤为强酸性(pH＜5.0),中性及碱性土壤比例小于17％.土壤pH值主要受成...

Influencing Factors and Intensity Change of Soil pH Value in South Jiangxi Province

[Objective] The influencing factors and intensity of soil pH value in Southern Jiangxi Province were studied to provide a scientific basis for soil acidification prevention and control. [Methods] 8 167 surface soil samples in Nankang District, Ganzhou City were collected, and the distribution characteristics and influencing factors of soil pH value were analyzed by using Chi-square test and correlation coefficient methods. [Results] 83.1% of the soil in the study area was highly acidity (pH<5.0), and the proportion of neutral and alkaline soil was less than 17%. The soil pH value was mainly affected by natural factors such as soil parent material and geological background. The influence intensity was as follows: parent material > geological background > elevation > land type > landform. Acidic soil was distributed in Paleozoic igneous rocks and the element loss areas with higher terrain, the soil in Mesozoic sedimentary rocks and low-lying areas with rich elements was alkaline. At the same time, the contribution of human activities to soil acidification could not be ignored. [Conclusion] The soil pH value in Southern Jiangxi Province is mainly controlled by soil parent material and geological background, and human activities have caused a certain difference in soil pH value in different land use types.