Soil hydraulic conductivity differences between upslope and downslope of two coniferous trees on a hillslope

Moein Farahnak, Keiji Mitsuyasu, Seonghun Jeong, Kyoichi Otsuki, Masaaki Chiwa, Seyed Mohammad Moein Sadeghi, Atsushi Kume

研究成果: ジャーナルへの寄稿記事

1 引用 (Scopus)

抄録

Standing trees influence the redistribution of soil water around the trunk and alter water movement under the canopy on hillslopes. We investigated soil properties around trees to clarify the effect of trees on soil hydraulic properties of soil surface layers on a slope. The intact tree and cut tree plots of two coniferous tree species, Cryptomeria japonica and Chamaecyparis obtusa, were considered in the northern part of Kyushu, Japan. The soil properties on the upslope and downslope of individual trees or stumps were compared. The soil near-saturated hydraulic conductivity (k ns ) on the upslope of individual trees and stumps was higher than that on the downslope for both species. Although the distribution patterns of k ns were similar in all plots, the determinant factors of k ns seemed to be different. In the Cr. japonica intact tree plot, more litter tended to accumulate on the upslope of individual trees, and it seemed to indirectly enhance k ns . However, the results of the cut tree plot suggested that k ns was affected by factors other than the litter layer biomass. In the Ch. obtusa intact plot, high water repellency of soil on the downslope of individual trees reduced k ns . Organic matter tended to accumulate on the upslope of Ch. obtusa individual stumps and in combination with water repellency appeared to affect k ns . Our findings showed that soil hydraulic conductivity was affected by the distance and direction from a tree on a slope and that the effect was maintained for a few years after cutting.

元の言語英語
ページ(範囲)143-152
ページ数10
ジャーナルJournal of Forest Research
24
発行部数3
DOI
出版物ステータス出版済み - 1 1 2019

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hillslope
hydraulic conductivity
coniferous tree
soil
Chamaecyparis obtusa
stumps
Cryptomeria japonica
soil property
litter
soil properties
soil water
Japan
soil surface layers
soil hydraulic properties
hydraulic property
saturated hydraulic conductivity
water
surface layer
tree trunk
soil surface

All Science Journal Classification (ASJC) codes

  • Forestry

これを引用

Soil hydraulic conductivity differences between upslope and downslope of two coniferous trees on a hillslope. / Farahnak, Moein; Mitsuyasu, Keiji; Jeong, Seonghun; Otsuki, Kyoichi; Chiwa, Masaaki; Sadeghi, Seyed Mohammad Moein; Kume, Atsushi.

:: Journal of Forest Research, 巻 24, 番号 3, 01.01.2019, p. 143-152.

研究成果: ジャーナルへの寄稿記事

Farahnak, Moein ; Mitsuyasu, Keiji ; Jeong, Seonghun ; Otsuki, Kyoichi ; Chiwa, Masaaki ; Sadeghi, Seyed Mohammad Moein ; Kume, Atsushi. / Soil hydraulic conductivity differences between upslope and downslope of two coniferous trees on a hillslope. :: Journal of Forest Research. 2019 ; 巻 24, 番号 3. pp. 143-152.
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