CLEARING A TROPICAL FOREST .1. EFFECTS ON SOIL AND MICRO-CLIMATE

被引：81

作者：

LAL, R

CUMMINGS, DJ

机构：

[1] International Institute of Tropical Agriculture, Ibadan, Oyo Road

来源：

FIELD CROPS RESEARCH | 1979年 / 2卷 / 02期

关键词：

D O I：

10.1016/0378-4290(79)90012-1

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

The effects of three methods of clearing a tropical rainforest were investigated for changes in soil physical and chemical properties and micro-climate on an Alfisol in southern Nigeria. The methods consisted of slash, slash and burn, and bulldozing. Deforestation increased the maximum air temperature by 5-8° C and the maximum soil temperature at 1 cm depth by 25° C. Compared with manual clearing, the mechanical method increased soil bulk density and penetration resistance and reduced infiltration rate and saturated hydraulic conductivity. Similarly affected were the moisture retention characteristics, moisture retention at zero suction being 22.0% for mechanical, compared with 30% for manual, clearing. Burning increased soil pH and total soluble salts such as Ca, Mg, and K. © 1979.

引用

页码：91 / 107

页数：17