EFFECT OF TOPOGRAPHY ON SELECTED SOIL PROPERTIES AND NITROGEN MINERALIZATION IN A DRY TROPICAL FOREST

被引：63

作者：

RAGHUBANSHI, AS

机构：

[1] Department of Botany, Banaras Hindu University, Varanasi

来源：

SOIL BIOLOGY & BIOCHEMISTRY | 1992年 / 24卷 / 02期

关键词：

D O I：

10.1016/0038-0717(92)90270-8

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

Soil nutrients and nitrogen mineralization rates were measured along three topographic sequences in a seasonally dry tropical forest. Soil organic C, total N and P decreased downslope. Accumulation of soil organic C and N was related to the P content which, in turn, was controlled by the proportion of fine particles in the soil. Net N mineralization and nitrification rates ranged from 0 to 33-mu-g g-1 month-1 and 0 to 19-mu-g g-1 month-1, respectively, within the annual cycle and among the topographic positions. Annual mineralization increased from 125-mu-g g-1 dry soil at the hillbase to 203-mu-g g-1 dry soil at the hilltop. These differences in mineralization rates were obviously related to the distribution of substrate.

引用

页码：145 / 150

页数：6

共 47 条

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