我国南方主要酸沉降区临界负荷研究  

Study on Critical Load of Acidic Deposition in Southern China

作　　者：韩沙沙[1] 

机构地区：[1]广州市环境保护科学研究院,广州510620

出　　处：《新疆环境保护》2009年第1期39-42,共4页Environmental Protection of Xinjiang

摘　　要：以马尾松为指示植物,对韶关的土壤进行了长期淋溶模拟并记录其化学状态。结果发现,土壤溶液的pH值下降到4.0,BS值下降到几乎为零,有较大量的Al离子溶出。最后选取土壤溶液pH>4.0、BS>10%和[Al3+]<0.1mmol/L为临界化学指标,参考国内外应用广泛的MAGIC模型和SMART模型,确定韶关酸沉降临界负荷(S的临界负荷)为14.1keq/hm2.a。The paper chooses Pinus massoniana as indicative plant and predicts the long - term trends of soil chemicals status of Shaoguan ecosystem. It turns out that the pH value of soil solution declines to 4.0, while the BS value nearly declines to zero and a certain amount of Al^3＋ dissolves from soil. The paper integrates the widely-used MAGIC model and SMART model and puts forward its own dynamic model. Finally uses soil solution pH value 4.0, BS 〉 10% and [Al^3＋] 〈 0.1mmol/L as critical chemical criteria, calculates the critical load for acidic deposition （the critical load for sulfur） and gets 14.1keq/hm^2. a as the result.

关 键 词：南方 红壤 马尾松 酸沉降临界负荷 

分 类 号：X517[环境科学与工程—环境工程]