| Registro completo |
| Provedor de dados: |
Rev. Bras. Ciênc. Solo
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| País: |
Brazil
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| Título: |
Plant-available soil water capacity: estimation methods and implications
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| Autores: |
Silva,Bruno Montoani
Silva,Érika Andressa da
Oliveira,Geraldo César de
Ferreira,Mozart Martins
Serafim,Milson Evaldo
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| Data: |
2014-04-01
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| Ano: |
2014
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| Palavras-chave: |
Field capacity
Permanent wilting point
Soil water retention curve modeling
Oxisol
Land use planning
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| Resumo: |
The plant-available water capacity of the soil is defined as the water content between field capacity and wilting point, and has wide practical application in planning the land use. In a representative profile of the Cerrado Oxisol, methods for estimating the wilting point were studied and compared, using a WP4-T psychrometer and Richards chamber for undisturbed and disturbed samples. In addition, the field capacity was estimated by the water content at 6, 10, 33 kPa and by the inflection point of the water retention curve, calculated by the van Genuchten and cubic polynomial models. We found that the field capacity moisture determined at the inflection point was higher than by the other methods, and that even at the inflection point the estimates differed, according to the model used. By the WP4-T psychrometer, the water content was significantly lower found the estimate of the permanent wilting point. We concluded that the estimation of the available water holding capacity is markedly influenced by the estimation methods, which has to be taken into consideration because of the practical importance of this parameter.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000200011
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| Editor: |
Sociedade Brasileira de Ciência do Solo
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| Relação: |
10.1590/S0100-06832014000200011
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| Formato: |
text/html
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| Fonte: |
Revista Brasileira de Ciência do Solo v.38 n.2 2014
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| Direitos: |
info:eu-repo/semantics/openAccess
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