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metadata.artigo.dc.title: Assessing pedotransfer functions to estimate the soil water retention
metadata.artigo.dc.title.alternative: Validação de funções de pedotransferência para estimativa da retenção de água no solo
metadata.artigo.dc.creator: Ribeiro, Bruno Teixeira
Costa, Adriana Monteiro da
Silva, Bruno Montoani
Franco, Fernando Oliveira
Borges, Camila Silva
metadata.artigo.dc.subject: Soil-water retention
Principal component analysis
Soil moisture
Retenção de água no solo
Análise do componente principal
Umidade do solo
metadata.artigo.dc.publisher: Universidade Federal de Uberlândia Dec-2018
metadata.artigo.dc.identifier.citation: RIBEIRO, B. T. et al. Assessing pedotransfer functions to estimate the soil water retention. Bioscience Journal, Uberlândia, v. 34, p. 177-188, Dec. 2018. Suplemento 1.
metadata.artigo.dc.description.abstract: Considering the importance of soil water retention for agricultural and environmental purposes, the objective of this study was to assess three pedotransfer functions (PTFs) used to estimate the soil moisture at field capacity (FC) based on soil attributes easily determined. A collection of 17 soils from the Cerrado and Pantanal biomes, including surface and subsurface horizons, was used. PTF-1 considers clay, organic matter, coarse sand, and microporosity; PTF-2 clay, total sand, and organic matter; and PTF-3 only microporosity. The estimated FC values were correlated to soil moisture values measured at different soil water potentials (0, 6, 10, 33, 100, 300, and 1500 kPa) to verify which potential corresponded to estimated FC. The data were subjected to regression analysis and Mann-Whitney rank-sum test to compare predicted and measured values and to principal component analysis (PCA). The analysis of the full dataset indicated that there was a strong correlation (R 0.84–0.91; R2 0.71–0.82; RMSE 0.07–0.09) between estimated FC and soil water retention measured at potentials of 10 kPa and 33 kPa. FC estimated by PTF-3 correlated better with water holding capacity at 6 kPa. When the PTFs were reapplied to homogeneous soil groups (identified by PCA analysis), the correlation between predicted and measured FC was decreased.
metadata.artigo.dc.language: en_US
Appears in Collections:DCS - Artigos publicados em periódicos

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