摘要
本文对土壤酸沉降敏感性的主要指标进行了分析对比，在此基础上提出了酸害容量和酸害强度的概念，对我国南方主要酸沉降区土壤类型进行了研究，并据此将我国南方主要土壤划分为4种敏感性类型。
he soil sensitive indices used usually in Europe and in America such as CEC, BS et al. arenot quite suitable for China because of the differences of the components of acid despition andsoil types. On the basis of comWison and analySis of main sensitive indices of soils to acidic deposition, two indices, i. e. soil to-acid--Poisoning capacity (STAPC) and soil to-acid-peisoning intensity (STAPI), which can better represent the soil H+ buffering processes and characteristics,are put forward in this Paper. The results show that soils in South China can be classified intofour sensitive groups: the most sensitive, sensitve, less sensitive and not sensitive with theSTAPC being 0-20 mmol/kg, 20-100 mmol/kg, 1 00-200 mmol/kg, >200 mmol/kg and theSTAPI being o- 10mmol/kg, 10-30 mmol/kg, 30-50 mmol/kg and > 50 mmol/kg respectively. Further, the main soil types in acid precipitation restons in South China are classified into different sensitive groups according to the results of acid buffering properties and the indices suggested. Ferrallisols, which are widely distributed in South China, are included in sensitive group,while purple soils and yellow soils in most sensitive group. Calcareous soils and vertisols with ahigh PH value and a large amount of CaCO3 or salts, scattered in Yunnan, Guangxi, Guizhouand Guangdong, are usually in less sensitive and not sensitive groups.
出处
《热带地理》
北大核心
1997年第4期391-396,共6页
Tropical Geography
基金
国家自然科学基金!49301018
广东省自然科学基金!960043
