摘要
以大宝山废石场为对象,研究废石场土壤的酸化程度和特征,并对其电导率和缓冲作用进行分析。结果表明,不同废石场之间土壤酸化程度、电导率和对碱的缓冲能力差异显著,改良措施的制定需要区别对待;除D点外,其它废石场土壤酸化非常严重,属极强酸性土壤,且交换性铝含量和电导率比较高,铝、盐胁迫可能是限制植物生长的因素之一;pH值在土壤上下层之间无显著差异,但酸化严重的土壤交换性酸、电导率和对碱的缓冲能力均为下层显著高于上层,表明降雨对废石场土壤有明显的淋溶作用,表层土壤酸化程度有减弱趋势。
Taking waste rock dumps in Dabaoshan mine as the object, the degree and characteristic of soil a- cidification in waste rock dumps were studied. Electric conductivity and buffer capacity of soil were analyzed. The results showed that soil acidification degree, electric conductivity and alkali buffer capacity were signifi- cantly different among different waste rock dumps, so soil amending measures also should be different. Ex- cept sampling point D, soil acidifications were very serious and classified into strong acid soil with higher ex changeable aluminium concentration and electric conductivity in other waste rock dumps. This indicated that aluminum and salt stress might be the factors that constrained plant growth. In serious acidified soil, the ex- changeable acid, electric conductivity and alkali buffer capacity were significantly lower in 0--20 cm depth than in 20--40 cm depth in soil profile, but non-difference for pH value. It showed that soil leached obvious- ly by rainfall in waste rock dumps and the acidification degree of topsoils gradually reduced.
出处
《水土保持学报》
CSCD
北大核心
2013年第6期46-50,共5页
Journal of Soil and Water Conservation
基金
国家自然科学基金(40801099)
高等学校博士学科点专项科研基金(20124404110022)
关键词
金属矿山
废石场
交换性酸
电导率
大宝山
metal mine
waste rock dumps
exchangeable acid
electric conductivity
Dabaoshan
