广西红壤特征及其环境影响分析

概述了广西红壤的类型、分布及其环境化学特征。分析认为 ,从红壤向赤红壤、砖红壤演化的受控环境条件是pH值降低、雨量增加及气温增高。由于酸雨和温室效应影响 ,可以预测广西区内红壤类型的分界线会逐渐北移。红壤区应防止被淋溶有害重金属对附近水体的污染 ;铁和铝在红壤中的大量富集是否对人群有影响值得进一步研究。红壤区有用微量元素和养分的大量流失 ,必然导致其地力下降 ,适当施用微肥和加强保肥是红壤区土壤保护的主攻方向。

The Features of Red Soil and Their Influences on Natural Environment in Guangxi Zhuang Autonomous Region

There are several types of red soil distributed in large areas in Guangxi Zhuang autonomous region. Different types of red soil is clearly stretched in zones . The controlling conditions of the evolving series from red soil to crimson soil and to drab-red soil are as following : pH value decreasing , rain precipitation and air temperature increasing . It can be foreseen that the demarcation lines between different types of red soil move gradually toward the north in Guangxi region due to the influences of acid rain and greenhouse effect. The water body should be protected from the poisonous heavy metal pollution which is leached out from the nearby red soil . It is necessary to do some further studies about whether a great deal of iron and aluminum elements in the red soil is harmful to humankind. The fertility will naturally decreases as the useful trace elements and soil nutrition are leached out in the red soil . It is important to use suitable fertilizer to protect the red soil resources.