摘要
为了研究酸沉降作用下中国南方 5个森林土壤铝的释放与活化 ,进行了土壤的模拟酸沉降浸泡试验 ,结果表明 ,土壤铝的释放与活化由土壤总碳量、可浸提铝以及土壤或溶液 p H值所控制 ,而且与酸沉降中酸度和其他阳离子浓度有关 .土壤铝的释放主要发生在表土 ,而心土、底土可能吸收部分来自表土的铝 .来自酸沉降的盐基离子将导致土壤铝释放的增加以及交换态铝增加量的下降 .酸沉降引起的铝毒性可能会出现在一些溶液 Al/ (Ca +Mg)比值远大于 1.0的土壤中 ,例如江西、福建。
Aluminum release and mobilization in five forest soils in southern China affected by acid deposition have been studied through a batch experiment by using simulated acid deposition. The results show that Al release and mobilization are controlled mainly by soil total carbon contents, extractable Al, and soil or solution pH, and are related to the acidity and the concentrations of other cations of acid deposition. Release of Al comes mostly from top soils, some could be possibly absorbed by the sub or bottom soils. Base cations from deposition result in an increase in release of Al, but a decrease in exchangeable Al in soil. Al toxicity might appear in the soils, such as Jiangxi, Fujian, and Chongqing, where molar ratios of Al/(Ca+Mg) in solutions may be much higher than 1.0 due to acid deposition.
出处
《湖南农业大学学报（自然科学版）》
CAS
CSCD
2000年第5期347-351,共5页
Journal of Hunan Agricultural University(Natural Sciences)
基金
国际合作项目
关键词
释放
活化
酸沉降
森林土壤
中国南方
土壤铝
aluminum
release and mobilization
acid deposition
forest soil
southern China
