平果铝土矿矿区周边坡地、耕地土壤基础理化性质空间差异  

Spatial difference of basic soil physical and chemical properties of sloping land and cultivated land around Pingguo bauxite mining area

作　　者：段绍彦 成官文[1] 解庆林[1] 张燎[1] 熊林 吴海文[3] 陈占钢[3] 张正林[3] DUAN Shao-yan;CHENG Guan-wen;XIE Qing-lin;ZHANG Liao;XIONG Lin;WU Hai-wen;CHEN Zhan-gang;ZHANG Zheng-lin(Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology,Guilin University of Technology,Guilin 541006,China;Guangxi Eco-Engineering Vocational&Technical College,Liuzhou 545004,China;Guangxi Branch of Aluminum Corporation of China,Baise 531499,China)

机构地区：[1]桂林理工大学广西环境污染控制理论与技术重点实验室,广西桂林541006 [2]广西生态工程职业技术学院,广西柳州545004 [3]中国铝业股份有限公司广西分公司,广西百色531499

出　　处：《桂林理工大学学报》2021年第1期201-209,共9页Journal of Guilin University of Technology

基　　金：中国铝业股份有限公司项目(gxzz201903);广西重点研发计划项目(桂科AB20297039)。

摘　　要：为探索广西平果铝土矿矿区采空区作为赤泥、矿泥回填复垦用地的可能性,对矿坑周边坡地、耕地土壤基础理化性质进行了研究。结果显示:矿区周边坡地、耕地土壤pH多呈中偏酸性,EC值以及可交换K^(+)、Na^(+)、Mg^(2+)浓度偏低,土壤质地、粒径与样点海拔高度关联。根据Pearson相关分析,坡地土壤含水率与海拔高度和采样深度呈正相关,土壤容重、相对密度与样点海拔高度呈负相关,但耕地土壤由于地表径流对轻腐殖质的冲刷作用,相对密度与海拔高度呈正相关。初步认为矿区周边坡地、耕地土壤的理化性质与成土母质、海拔高度、地表雨水径流等综合作用密切关联。由于矿坑周边坡地、耕地土壤的基本理化性质与赤泥、矿泥特性较为互补,矿区矿坑能够为赤泥、矿泥回填复垦提供适宜环境空间。In order to explore the possibility of bauxite mining goaf in Pingguo of Guangxi as a backfill reclamation land of red mud and mine slime,basic physical and chemical properties of sloping land and cultivated land soil around the mine pit were studied.The results showed that the pH of most sloping land and cultivated land around the mining area were neutral or acidulous,the EC value and exchangeable K^(+),Na^(+),Mg^(2+)ion contents were low,and the soil texture and particle size were highly associated to the altitude of sample points.The water content and average total porosity were positively correlated with the altitude of sloping land soil.The bulk density and specific gravity were negatively correlated with the altitude of cultivated land soil,but specific gravity of cultivated land was positively correlated with elevation because the scour action of light humus by surface runoff.But the proportion of surface runoff scour of cultivated land was positively correlated with elevation due to light humus.It is preliminarily believed that the physical and chemical properties of sloping land and cultivated land around the mining area were closely associated to the comprehensive effects of parent material,altitude and surface rainwater runoff.Because the basic physical and chemical properties of sloping land and cultivated land soil around the mining pit are complementary to the characteristics of red mud and ore mud,the mining pit can provide suitable environmental space for the backfill reclamation of red mud and mine slime.

关 键 词：铝土矿矿区采空区 坡地 耕地 土壤理化性质 海拔高度 平果 

分 类 号：S153[农业科学—土壤学]