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＜departmental bulletin paper＞
The Influence of Hydraulic Conductivity and Water Retentivity on the Water Supplying Power of Soil

Creator
Creator Name
田中, 明
Tanaka, Akira
Affiliation
Affiliation Name
九州大学農学部灌漑利水工学研究室
Laboratory of Irrigation and Water Utilization, Faculty of Agriculture, Kyushu University
Creator Name
長, 智男
Cho, Tosio
Affiliation
Affiliation Name
九州大学農学部灌漑利水工学研究室
Laboratory of Irrigation and Water Utilization, Faculty of Agriculture, Kyushu University
Language
Japanese
Publisher
九州大學農學部
Faculty of Agriculture, Kyushu University
Date
1987-02
Source Title
Science bulletin of the Faculty of Agriculture, Kyushu University
Vol
41
Issue
1/2
First Page
63
Last Page
70
Publication Type
Version of Record
Access Rights
open access
JaLC DOI
https://doi.org/10.15017/22233
Related DOI
九州大學農學部學藝雜誌 || 41(1/2) || p63-70
Science bulletin of the Faculty of Agriculture, Kyushu University || 41(1/2) || p63-70
http://www.agr.kyushu-u.ac.jp/
Related URI
九州大學農學部學藝雜誌 || 41(1/2) || p63-70
Science bulletin of the Faculty of Agriculture, Kyushu University || 41(1/2) || p63-70
http://www.agr.kyushu-u.ac.jp/
Relation
九州大學農學部學藝雜誌 || 41(1/2) || p63-70
Science bulletin of the Faculty of Agriculture, Kyushu University || 41(1/2) || p63-70
http://www.agr.kyushu-u.ac.jp/

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Details

Record ID
22233
Peer-Reviewed
Unrefereed
Subject Terms
保水性
透水性
水分供給力
指標
ISSN
0368-6264
NCID
AN0005519X
Notes
The water supplying power of soil to crop roots depends on its physical properties. These properties are described by the hydraulic conductivity-matric potential-moisture content relationships. Without dynamic analysis of soil water movement，it is difficult to predict intuitively the effects of these physical properties on crops. In this study, 3 indices were defined: hydraulic conductivity index (K^^-), water retentivity index (Θ) and responsivity index (K^^-/Θ) of soil. Using these indices, the effect of the water supplying power of soil on soil water movement and crown potential of crop were estimated. It is proved by numerical analysis that these indices are useful in estimating intuitively the water supplying power of soil to crops.
作物の生育に土壌水分が大きな影響を与えることは良く知られている.土壌の成層状態,地下水位などの水理学的土壌条件,根系分布,群落構造などの作物条件及び気象条件が一定であれば,土壌が作物の根に水分を供給する能力は主として土壌の保水性と透水性に依存する.この保水性と透水性は一般には不飽和透水係数-マトリックポテンシャル-土壌水分量の相互関係によって表される.しかし,これらの相互関係についてのデータのみから,土嘆の保水性と透水性の特徴を把握し,作物生育に与える影響を予想することは,土壌水分動態のシミュレーションをおこなわないかぎり困難である.本研究では,土壌の保水性と透水性が作物生育に果たす役割を直覚的に評価するために,土壌の保水性,透水性及び応答性を表す簡単な指標を定義した.これらの指標を用いることによって,土壌が作物に水分を供給する能力を推測できることを数値実験の手法を用いて明らかにした.
Created Date 2012.06.30
Modified Date 2022.11.11

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