摘要
概述了横断山区主要土类的地理分布情况，土壤理化性质及地球化学特征，然后分析土壤中 Ｃｕ，Ｚｎ，Ｐｂ，Ｎｉ，Ｃｏ，Ｃｄ和
The main soil types in Hengduan Mountainous Region are dry-red soil, cinnamon soil, red earth, red-brown earth, mountain yellow earth, yellow-brown earth , brown earth, dark brown earth. graydrab soil,subalpine meadow soil and alpine desert soil etc. Generally the pH of soil is between 5. 6-7. 0,except that the gray-drab soil is 4. 8 cinnamon soil and dry-red soil, between 7. 7~ 7. 7. The pH of same soil types will have difference when the soil parend material is different. The contents of soil organce matter in various soil types are different. The contents of forest earth and subalpine meadow sold are > 10. 0%. The contents of dry-red soil, cinnamon and alpine desert soil are between 1. 0%~ 2. 5%. The oxide composition of varied soil types are mainly SiO_2, AbO_3 and Fe_2O_3,and the gray-drab soil is SiO_2, Ai_2O_3 and TiO_2. In the element contents of soil,the elements of Cd, Co, Ni, Cu,Pb all are higher than these background values of soil elements in China. Cd is 8. 3 times in China and 29. 9 times in the world. Cu-Ni, Cu-Cd, Zn-Co, Ni-Co have positive correlation, but F-Cu, F-Co have negative correlation.
出处
《山地研究》
CSCD
1997年第1期30-35,T001,共7页
关键词
元素含量
土壤地球化学
横断山区
element centents,soil geochemistry,Hengduan Mountainous Region
