Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 449-458 |
| Seitenumfang | 10 |
| Fachzeitschrift | Journal of Plant Nutrition and Soil Science |
| Jahrgang | 177 |
| Ausgabenummer | 3 |
| Publikationsstatus | Veröffentlicht - 2014 |
Abstract
To investigate the effect of plants on soil water repellency (SWR), two column experiments with wheat (Triticum aestivum) and alfalfa (Medicago sativa) with a growing period of three months had been carried out under constant and near-natural climatic conditions. Model soils with defined wettability were created by mixing a natural sandy loam subsoil with different proportions of a wettable and a hydrophobized pure quartz sand, resulting in a wettable model soil and three model soils with increasing level of subcritical SWR (initial contact angle CA > 0° and < 90°). Results showed a significant decrease of the mean CA after the experiments compared to the initial CA while the mean CA was constant for plant free columns used as a reference. CA as a function of depth in some cases showed a depth dependent variation with decreased CA at the bottom or as well at top and bottom. The deviation from the initial CA was most pronounced for wheat under constant climatic conditions. Changes in CA could be related to changes in pH, i.e., CA was decreased and pH increased. Subcritical WR at the beginning of the growth period affected significantly the moisture content profiles during the entire growing season as well as plant dry mass production. We expect that plant root exudates of plants widely used for foot production cause directly or indirectly pH-related modifications of the WR level in the root zone dependent on plant species and the ambient climatic conditions.
ASJC Scopus Sachgebiete
- Agrar- und Biowissenschaften (insg.)
- Bodenkunde
- Agrar- und Biowissenschaften (insg.)
- Pflanzenkunde
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in: Journal of Plant Nutrition and Soil Science, Jahrgang 177, Nr. 3, 2014, S. 449-458.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - How the root zone modifies soil wettability
T2 - Model experiments with alfalfa and wheat
AU - Hassan, Magda
AU - Woche, Susanne K.
AU - Bachmann, Jörg
N1 - Copyright: Copyright 2014 Elsevier B.V., All rights reserved.
PY - 2014
Y1 - 2014
N2 - To investigate the effect of plants on soil water repellency (SWR), two column experiments with wheat (Triticum aestivum) and alfalfa (Medicago sativa) with a growing period of three months had been carried out under constant and near-natural climatic conditions. Model soils with defined wettability were created by mixing a natural sandy loam subsoil with different proportions of a wettable and a hydrophobized pure quartz sand, resulting in a wettable model soil and three model soils with increasing level of subcritical SWR (initial contact angle CA > 0° and < 90°). Results showed a significant decrease of the mean CA after the experiments compared to the initial CA while the mean CA was constant for plant free columns used as a reference. CA as a function of depth in some cases showed a depth dependent variation with decreased CA at the bottom or as well at top and bottom. The deviation from the initial CA was most pronounced for wheat under constant climatic conditions. Changes in CA could be related to changes in pH, i.e., CA was decreased and pH increased. Subcritical WR at the beginning of the growth period affected significantly the moisture content profiles during the entire growing season as well as plant dry mass production. We expect that plant root exudates of plants widely used for foot production cause directly or indirectly pH-related modifications of the WR level in the root zone dependent on plant species and the ambient climatic conditions.
AB - To investigate the effect of plants on soil water repellency (SWR), two column experiments with wheat (Triticum aestivum) and alfalfa (Medicago sativa) with a growing period of three months had been carried out under constant and near-natural climatic conditions. Model soils with defined wettability were created by mixing a natural sandy loam subsoil with different proportions of a wettable and a hydrophobized pure quartz sand, resulting in a wettable model soil and three model soils with increasing level of subcritical SWR (initial contact angle CA > 0° and < 90°). Results showed a significant decrease of the mean CA after the experiments compared to the initial CA while the mean CA was constant for plant free columns used as a reference. CA as a function of depth in some cases showed a depth dependent variation with decreased CA at the bottom or as well at top and bottom. The deviation from the initial CA was most pronounced for wheat under constant climatic conditions. Changes in CA could be related to changes in pH, i.e., CA was decreased and pH increased. Subcritical WR at the beginning of the growth period affected significantly the moisture content profiles during the entire growing season as well as plant dry mass production. We expect that plant root exudates of plants widely used for foot production cause directly or indirectly pH-related modifications of the WR level in the root zone dependent on plant species and the ambient climatic conditions.
KW - Contact angle (CA)
KW - Dimethyldichlorosilane (DMDCS)
KW - Subcritical water repellency
KW - Wettability of root zone
UR - http://www.scopus.com/inward/record.url?scp=84901684431&partnerID=8YFLogxK
U2 - 10.1002/jpln.201300117
DO - 10.1002/jpln.201300117
M3 - Article
AN - SCOPUS:84901684431
VL - 177
SP - 449
EP - 458
JO - Journal of Plant Nutrition and Soil Science
JF - Journal of Plant Nutrition and Soil Science
SN - 1436-8730
IS - 3
ER -