Apparent change in soil depth and soil hardness in forest areas in Kampong Thom Province, Cambodia

被引：10

作者：

Ohnuki, Yasuhiro ^{[1
]}

Kimhean, Chansopheaktra ^{[1
]}

Shinomiya, Yoshiki ^{[1
]}

Sor, Sethik ^{[1
]}

Toriyama, Jumpei ^{[1
]}

Ohta, Seiichi ^{[1
]}

机构：

[1] FFPRI, Kyushu Res Ctr, Kumamoto, Japan

来源：

FOREST ENVIRONMENTS IN THE MEKONG RIVER BASIN | 2007年

关键词：

D O I：

10.1007/978-4-431-46503-4_24

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

In the evergreen forests in Kampong Thom Province, Cambodia, soil depth and soil hardness apparently change from the rainy season to the dry season. In contrast, in deciduous and mixed forests, these parameters hardly change in either season. The apparent changes in soil depth and hardness would be strongly affected in the dry season by physical properties, including clay content and transpiration rates. At the DEFlog plot, hard soils were confirmed in the dry season from just below the surface to 4 m in depth. This fact suggests that the roots siphon off soil water from very deep under the surface of the ground. Assuming that the effective porosity of the soils was 0.09 m(3) m(-3), the soil water consumption rate in the dry season from just below the surface to 4.1 m in depth, occurring mainly by transpiration, was approximately 369mm. In addition to this, a deeper soil layer above the groundwater level loses considerable soil water in the dry season.

引用

页码：263 / +

页数：4

共 27 条

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