Pedotransfer functions for estimating the van Genuchten model parameters in the Cerrado biome

Veloso, Márcia Paranho; Filho, Elpídio Inácio Fernandes; Veloso, Carolina F.; Rezende, Bruna Nogueira

doi:10.1590/1807-1929/agriambi.v27n3p202-208

Cited by 4 publications

(1 citation statement)

References 21 publications

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“…A maioria dos solos encontrados em Mato Grosso são conhecidos como Latossolos. Esses solos possuem um elevado teor de argila e apresentam uma estrutura bem organizada, o que resulta em uma alta condutividade hidráulica (VELOSO et al, 2023), no entanto essa classe de solos geralmente apresentam uma transição abrupta entre poros muito grande e muito pequeno, denominados de distribuição bimodal de poros (CARDUCCI et al, 2011;AMORIM et al, 2022), sendo esse um dos motivos pelos quais funções de pedotransferência desenvolvidas em solos temperados não possuírem bons ajustes quando aplicadas em solos de clima tropical (OTTONI et al, 2018).…”

Section: Methodsunclassified

Limite Superior E Inferior De Retenção Da Água No Solo: Método Laboratorial E De Estimativa

Santos,

Silva,

Feletti

et al. 2023

R_I

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LIMITE SUPERIOR E INFERIOR DE RETENÇÃO DA ÁGUA NO SOLO: MÉTODO LABORATORIAL E DE ESTIMATIVA DEBORAH DE AMORIM TEIXEIRA SANTOS¹*; TONNY JOSÉ ARAÚJO DA SILVA²; RÔMULO CAIQUE GONÇALVES FELETTI³; EDNA MARIA BONFIM-SILVA4; MILTON FERREIRA DE MORAES5 E EMILIO CARLOS DE AZEVEDO6 *Dados parciais da dissertação de mestrado da primeira autora. ¹Universidade Federal de Mato Grosso/Programa de Pós-Graduação em Agricultura Tropical. Av. Fernando Correa da Costa, 2367, Boa Esperança, 78060-900, Cuiabá, MT, Brasil, deborahamorim7@hotmail.com ²Professor Titular, Universidade Federal de Rondonópolis/Programa de Pós-Graduação em Engenharia Agrícola, Rodovia MT 270, 5055, 78735-910, Rondonópolis, MT, Brasil, tonnyjasilva@gmail.com 3Universidade Federal de Mato Grosso/Programa de Pós-Graduação em Agricultura Tropical, Av. Fernando Correa da Costa, 2367, Boa Esperança, 78060-900, Cuiabá, MT, Brasil, rcfeletti@gmail.com 4Professor Associado, Universidade Federal de Rondonópolis/Programa de Pós-Graduação em Engenharia Agrícola, Rodovia MT 270, 5055, 78735-910, Rondonópolis, MT, Brasil, embonfim@hotmail.com 5Professor Adjunto, Universidade Federal de Mato Grosso, Câmpus Universitário do Araguaia/Programa de Pós-Graduação em Agricultura Tropical, Av. Valdon Varjão, 6390, 78605-091, Barra do Garças, MT, Brasil, moraesmf@yahoo.com.br 6Professor Titular, Faculdade de Agronomia e Zootecnia/ Departamento de Solos e Engenharia Rural, Universidade Federal de Mato Grosso, Av. Fernando Correa da Costa, 2367, Boa Esperança, 78060-900, Cuiabá, MT, Brasil, emilio.azevedo@ufmt.br 1 RESUMO Neste estudo, objetivou-se comparar os valores estimados por funções de pedotransferência com os dados dos limites de retenção de água no solo, observados em laboratório. Foram selecionadas 7 áreas localizadas em Mato Grosso, das quais foram coletadas amostras deformadas e indeformadas, com vistas à análise de um conjunto de atributos físicos e físico-hídricos. A partir das análises das amostras foram avaliadas quatro funções de pedotransferência e um software, obtidos em publicações. Para a validação do desempenho das funções utilizou-se o coeficiente de Pearson, raiz quadrada do erro médio, índice de concordância e o índice de desempenho. O conteúdo de água disponível correlaciona-se com a microporosidade e a granulometria do solo, funções geradas a partir dessas variáveis preditoras apresentam bons coeficientes de determinação. Parte das funções testadas apresentaram baixa acurácia na estimativa do conteúdo de água, com exceção das funções de Rosseti et al. (2022) na tensão de 0,033 MPa e Nascimento et al. (2010) na tensão de 1,5 MPa, podendo ser utilizadas para predição do conteúdo de água nos respectivos potenciais. Funções de pedotransferência podem ser empregadas para estimar o limite superior e inferior de retenção de água no solo quando não extrapoladas para além do local de origem. Palavras-chave: Relação solo-água, atributos físico-hídrico, disponibilidade hídrica, função de pedotransferência. SANTOS, D. A. T.; SILVA, T. J. A. S.; FELETTI, R.C. G.; BONFIM-SILVA, E. M.; MORAES, M. F.; AZEVEDO, E. C. UPPER AND LOWER LIMIT OF WATER RETENTION IN SOIL: LABORATORY METHOD AND ESTIMATION 2 ABSTRACT This study aimed to compare the values estimated by pedotransfer fuctions with the data from soil water retention limits, observed in the laboratory. We selected 7 areas located in Mato Grosso, from which deformed and deformed samples were collected, with a view to the analysis of a set of physical and physical-hydric attributes. From the analysis of the samples, four pedotransfer functions and one software obtained in publications were evaluated. To validate the performance of the functions, Pearson coefficient, square root of the mean error, agreement index and performance index were used. The available water content correlates with the microporosity and granulometry of the soil, functions generated from these predictor variables presente good coefficients of determination. Part of the tested functions showed low accuracy in estimating water content, with the exception of the functions of Rosseti et al. (2022) at the tension of 0.033 MPa and Nascimento et al. (2010) at the tension of 1.5 MPa, which can be used to predict the water contente in the respective potentials. Pedotransfer functions can be employed to estimate the upper and lower limit of soil water retention when not extrapolated beyond the place of origin. Keywords: Soil-water relationship, physical-water attributes, water availability, pedotransfer function.

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Section: Methodsunclassified

Limite Superior E Inferior De Retenção Da Água No Solo: Método Laboratorial E De Estimativa

Santos,

Silva,

Feletti

et al. 2023

R_I

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Pedotransfer functions for estimating hydraulic conductivity and soil moisture in the Cerrado biome

Veloso,

Rodrigues,

Fernandes Filho

2024

Rev. bras. eng. agríc. ambient.

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The Cerrado biome is a strategic region for Brazilian agriculture, and obtaining physical hydraulic properties is fundamental to understanding the dynamics of soil water and its impact on productivity. However, the lack and difficulty of obtaining such properties opens an opportunity to use pedotransfer functions (PTFs). In the context, the objective of the present study was to develop PTFs using multiple linear regression to estimate hydraulic conductivity of the saturated soil (Ks) and soil moisture at tensions of 0, 6, 10, 33, 100, and 1,500 kPa for the Cerrado biome. For this, two different predictor datasets were used. Dataset 1 consists of sand, silt, clay, bulk density, particle density, total porosity, microporosity, and macroporosity, and dataset 2 consists of the variables in dataset 1 plus soil moisture at field capacity (FC) and soil moisture at the permanent wilting point (PMP). Dataset 2 presented the best performance compared to Dataset 1 for estimating Ks and soil moisture, highlighting the importance of moisture in FC and PWP as predictors in the development of PTFs. However, the PTFs developed for Ks presented a low predictive capacity in all predictor datasets, unlike the soil moistures that presented high precision, with R² greater than 0.8 and errors close to zero.

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Analysis and spatial prediction of water retention curves in two types of soil

Cortés-Delgadillo,

Camacho Tamayo,

Giraldo

2024

Rev. bras. eng. agríc. ambient.

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Soil is a medium that stores and transfers air, water, nutrients and heat to microorganisms and plants. Its water storage capacity is studied by analysing water retention curves (WRCs), which establish the relationship between soil water content and the force with which water is retained. The objective of this work was to evaluate the capacity of functional geostatistics in predicting the spatial distribution of water retention curves in two types of soils. Experimental areas with two types of soil, Andisol and Oxisol, were selected, and a regular grid of 75 sites was established, from which water retention curves were obtained at two depths. The curves were subjected to geostatistical functional analysis (GF), and the applicability of this method was evaluated by obtaining the usable water table (LAA) and comparing the results with experimental data obtained using traditional methods. Based on cross-validation, it was verified that GF produced a better fit for the Andisol since the coefficient of determination between the LAA values for the measured data and predictions was high, with an R2 of 99%; however, the proposed methodology was also reliable for the Oxisol, since an R2 of 94% was obtained at the two depths studied.

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Pedotransfer functions for estimating the van Genuchten model parameters in the Cerrado biome

Cited by 4 publications

References 21 publications

Limite Superior E Inferior De Retenção Da Água No Solo: Método Laboratorial E De Estimativa

Limite Superior E Inferior De Retenção Da Água No Solo: Método Laboratorial E De Estimativa

Pedotransfer functions for estimating hydraulic conductivity and soil moisture in the Cerrado biome

Analysis and spatial prediction of water retention curves in two types of soil

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