Water movement and stability of profiles in drained, clayey and swelling soils: at saturation, the structural stability determines the profile porosity
| Autor: | Y. Pons, Alain Capillon, C. Cheverry |
|---|---|
| Přispěvatelé: | Domaine expérimental de Saint-Laurent-de-la-Prée (ST LAURENT DE LA PREE), Institut National de la Recherche Agronomique (INRA), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad), Ecole Nationale Supérieure Agronomique d'Alger, Sol Agro et hydrosystème Spatialisation (SAS), AGROCAMPUS OUEST, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut National de la Recherche Agronomique (INRA) |
| Jazyk: | angličtina |
| Rok vydání: | 2000 |
| Předmět: |
P33 - Chimie et physique du sol
[SDV.SA]Life Sciences [q-bio]/Agricultural sciences [SDV]Life Sciences [q-bio] Soil Science Soil science Plant Science 010501 environmental sciences 01 natural sciences [SHS]Humanities and Social Sciences Field capacity root depth saline and sodic soils P10 - Ressources en eau et leur gestion marshland soils Water content ComputingMilieux_MISCELLANEOUS 0105 earth and related environmental sciences 2. Zero hunger macroporosity Soil morphology Soil classification soil classification 04 agricultural and veterinary sciences 15. Life on land Soil gradation winter wheat Soil structure Soil water 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Soil horizon Environmental science soil structure Agronomy and Crop Science water table |
| Zdroj: | European Journal of Agronomy European Journal of Agronomy, Elsevier, 2000, 12 (3-4), pp.269-279. ⟨10.1016/S1161-0301(00)00053-8⟩ European Journal of Agronomy, Elsevier, 2000, 12, pp.269-279 |
| ISSN: | 1161-0301 |
| DOI: | 10.1016/S1161-0301(00)00053-8⟩ |
| Popis: | In clayey, swelling and more or less sodic soils, cultivation and seasonal climatic cycles induce variations in soil moisture which in turn cause variations in the soil structure. In particular, when the soil profile is saturated, some soils become impermeable because the soil porosity value does not remain sufficiently high throughout the drainage period to be effective for water movement. In the marshland soils of the French Atlantic coast, this ability is linked with the soil stability. We showed that soil profile stability and porosity are linked. First, we produced a classification of soil profiles ordered according to their degree of stability. Then, after describing the main features of the soil profile structure at saturation period, we proposed the concept of 'porosity profile'. This classification and concept were tested on farm fields by measuring two parameters: the water table in winter and the rooting depth of winter wheat. The values assumed by these parameters are indicators of field hydraulic and agronomic behaviour and more precisely of the depth of the soil layers where macroporosity allows water circulation and root colonisation. These results enabled us to validate the concept of 'porosity profile'. © 2000 Elsevier Science B.V. All rights reserved. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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