Use este identificador para citar ou linkar para este item: http://repositorio.ufla.br/jspui/handle/1/13187
Título : Critical soil moisture range for a coffee crop in an oxidic latosol as affected by soil management
Autor: Silva, Bruno Montoani
Oliveira, Geraldo César
Serafim, Milson Evaldo
Silva, Érika Andressa
Ferreira, Mozart Martins
Norton, Lloyd Darrell
Curi, Nilton
Palavras-chave: Fraction of transpirable soil water
Least limiting water range
Conservation management
Soil physical quality
Intercropping
Fração de água do solo respirável
Limite mínimo da água
Gerenciamento de conservação
Qualidade física do solo
Publicador: Elsevier
Data da publicação: Dez-2015
Referência: SILVA, B. M. et al. Critical soil moisture range for a coffee crop in an oxidic latosol as affected by soil management. Soil and Tillage Research, Amsterdam, v. 154, p. 103-111, Dec. 2015.
Abstract: Soil management systems affect water availability to plants which is essential for perennial crops such as coffee, especially in initial years of crop establishment. The objective of this study was to investigate the effects of additional gypsum and intercropping on the least limiting water range (LLWR) in an Oxidic Latosol. We also introduced in this study a lower limit of LLWR based on crop evaporation depletion factor (p) and a critical moisture (θ*) approach. Three management systems were tested: conventional (CV-0), conservation with Brachiaria decumbens and additional gypsum [7 Mg ha−1 (G-7) and 28 Mg ha−1 (G-28)]. Three trenches (1.0 m depth) were dug for each management system for 0–0.05, 0.15–0.20 and 0.65–0.70 m depth sampling. Results showed that LLWR increases with bulk density (Bd) until a first restriction to root growth occured, due to limited aeration. LLWR was always greater than zero, indicating adequate soil quality and water stress was the main plant growth limiting factor. Adoption of θ* as LLWR lower limit allowed an average reduction of 50.2% in available water. But, this reduction was significantly greater for greater Bd, so this indicates that LLWR modeling is an aid in understanding soil management effects. At 0.15–0.20 m depth, LLWR was greater in G-28 than CV-0. Also at 0.65–0.70-m depth, LLWR in G-28 was the greatest, followed by G-7 and CV-0 treatment. G-28 showed greater LLWR than CV-0 in the interrow position. These results support the hypothesis that the use of Brachiaria in interrow and additional gypsum contributes favorably to modify the soil profile conditions for better coffee root development in conservation management systems.
URI: http://www.sciencedirect.com/science/article/pii/S0167198715001300
http://repositorio.ufla.br/jspui/handle/1/13187
Idioma: en_US
Aparece nas coleções:DCS - Artigos publicados em periódicos

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