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赣南地区土壤pH值分布的影响因素及其强度变化
刘雪松, 张智印, 魏建朋
中国地质调查局水文地质环境地质调查中心, 河北 保定 071051
摘要:
[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值主要受成土母质和地质背景等自然因素的影响,影响强度表现为:成土母质 > 地质背景 > 高程 > 用地类型 > 地貌。酸性土壤分布在古生代火成岩和地势较高的元素流失区;中生代沉积岩和地势低洼元素富集区中土壤呈现碱性化,同时人类活动对土壤酸化的贡献不容忽视。[结论] 赣南地区土壤pH值形成主要受成土母质和地质背景控制,人类活动促使土壤pH值在不同土地利用类型上出现一定程度的异化。
关键词:  赣南丘陵区  土壤pH值  影响因素  强度对比
DOI:10.13961/j.cnki.stbctb.2021.04.014
分类号:S147.2
基金项目:中国地质调查局大调查项目“海峡西岸经济区土地质量地球化学调查”(DD20179303)
Influencing Factors and Intensity Change of Soil pH Value in South Jiangxi Province
Liu Xuesong, Zhang Zhiyin, Wei Jianpeng
Hydrogeology and Environmental Geology Survey Center of CGS, Baoding, Hebei 071051, China
Abstract:
[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.
Key words:  hilly areas in Southern Jiangxi Province  soil pH value  influencing factors  intensity contrast