Estimation of water retention and availability in soils of Rio Grande do Sul

Reichert, José Miguel; Albuquerque, Jackson Adriano; Kaiser, Douglas Rodrigo; Reinert, Dalvan José; Urach, Felipe Lavarda; Carlesso, Reimar

doi:10.1590/s0100-06832009000600004

Cited by 117 publications

(97 citation statements)

References 33 publications

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“…In the fourth sampling, PAWC was higher, but it did not show a clear trend among samplings at 0.10 to 0.20 layer. Overall, PAWC values were close to those observed by Tueche and Hauser (2011) in a clay soil, in Cameroon, cultivated with maize and with those generated using pedotransfer functions by Reichert et al (2009b) for Brazilian clay soils.…”

Section: Water Retention Curve Available Water Air-entry Pressure Asupporting

confidence: 79%

Seasonal changes in soil physical properties under long-term no-tillage

Moreira

Karlen

Silva³

et al. 2016

Soil and Tillage Research

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Section: Water Retention Curve Available Water Air-entry Pressure Asupporting

confidence: 79%

Seasonal changes in soil physical properties under long-term no-tillage

Moreira

Karlen

Silva³

et al. 2016

Soil and Tillage Research

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“…The general MEs, for the potential of -33 kPa at the depths from 0 to 20 and 40 to 70 cm, were 0.08 and 0.06 dag kg -1 , and for the -1500 kPa potential, were -1.08 and -0.07 dag kg -1 , respectively, showing the trend of the general PTFs to overestimate the moisture value for the -33 kPa potential and underestimate it for the potential of -1500 kPa. That same behavior was also verified in the works of Nebel et al (2010), Reichert et al (2009), andTomasella et al (2000).…”

Section: Generation and Validation Of Specific Pedotransfer Functionssupporting

confidence: 79%

“…That is associated to the higher clay content at that depth, mainly due to the significant occurrence of soils with a textural B horizon (PV, PVA and PA) and a planic B (SX). The clay increases the specific area of the soil matrix and as a consequence, favors the water adsorption and retention processes (REICHERT, et al, 2009). Ciênc.…”

Section: Resultsmentioning

confidence: 99%

“…Possibly, that occurred because RL, as well as RR, are very poorly developed soils (by definition they do not have a B horizon), tending to present a wide variation in their mineralogy (EMBRAPA, 2003;OLIVEIRA et al, 2002;REICHERT et al, 2009). It can be observed that at the 0-20 cm depth and -1500 kPa matric potential, the RR presents a R² value of 0.69, probably reflecting the relatively higher weathering degree of this layer, decreasing the mineralogical variability.…”

Section: Generation and Validation Of Specific Pedotransfer Functionsmentioning

confidence: 99%

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Pedotransfer functions for water retention in different soil classes from the center-southern Rio Grande do Sul State

et al. 2013

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Water retention in soil is used in many agronomic and environmental applications, but its direct measurement is timeconsuming and expensive. Therefore, pedotransfer functions (PTFs) are alternatives to obtain this information faster and more economically. The objectives of this study were to generate and validate PTFs to estimate the water content at potentials of -33 kPa (field capacity) and -1500 kPa (permanent wilting point) for different soil classes from the central-south portion of Rio Grande do Sul State. The physical and chemical analyses database from soil surveys of the Celulose Riograndense Corp were used. The database is composed of particle size distribution (coarse and fine sand, silt and clay), soil organic matter, and water content data at the above mentioned potentials, besides other information concerning the behavior of the soil classes at field conditions. Firstly, the data were stratified by soil classes and depths, and then 70% of the data were separated for PTF generation and 30% for validation. PTFs were generated for each specific soil class and also general PTFs which were not stratified by soil class, by means of stepwise multiple regression. In most situations, PTFs for a specific soil class showed a better fit than the general PTFs. Proper adjustment of the data showed that the water retention values at potentials of -33 kPa and -1500 kPa can be estimated for the soils from the central-south portion of Rio Grande do Sul State that do not have such analyses through the use of PTFs.Index terms: Permanent wilting point, field capacity, water retention curve. RESUMOA retenção de água no solo é utilizada em diversas aplicações agronômicas e ambientais, porém sua medição direta consome tempo e dinheiro. Por isso, funções de pedotransferência (FPTs) são alternativas para a obtenção dessas informações de forma mais rápida e econômica. Neste trabalho, objetivou-se gerar e validar FPTs, para estimar o conteúdo de água nos potenciais de -33 kPa (capacidade de campo) e -1500 kPa (ponto de murcha permanente) para diferentes classes de solos na porção centro-sul do Rio Grande do Sul. Utilizou-se o banco de dados de análises físicas e químicas dos levantamentos de solos da empresa Celulose Riograndense, que é composto por dados de textura (areia grossa e fina, silte e argila), matéria orgânica do solo e dados de conteúdo de água nos potenciais supracitados, entre outras informações sobre o comportamento das classes de solo em condições de campo. Primeiramente, os dados foram estratificados por classes de solos e profundidades e, posteriormente, 70% dos dados foram separados para geração das FPTs e 30% para validação. Geraram-se FPTs específicas para cada classe de solo e também FPTs gerais, sem estratificação por classe de solos, por meio de regressão múltipla stepwise. Na maioria das situações, as FPTs específicas por classe de solo apresentaram melhor ajuste do que as FPTs gerais. Na maioria dos casos, o ajuste adequado dos dados demonstrou que os valores de retenção de água nos potenciai...

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“…Soils with finer particles (clay or silt) and higher organic matter content have higher water retention, because organic matter is important for water availability and retention (Reichert et al, 2009b). Furthermore, Klein and Libardi (2000) report that the soil structure and texture, type and amount of clay, and organic matter content are the factors that affect water availability to crops.…”

Section: Discussionmentioning

confidence: 99%

Soybean Tillage Systems and Physical Changes in Surface Layers of Two Albaqualf Soils

Sartori

Marchesan

David

et al. 2016

Rev. Bras. Ciênc. Solo

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ABSTRACT:A compacted subsurface soil layer can be a limiting factor for soybean growing, reducing soybean yield. The aim of this study was to evaluate the effect of different tillage systems on the physical properties of two Albaqualf soils of the Central Plains region in the state of Rio Grande do Sul in southern Brazil. Two experiments were conducted: one in Santa Maria, RS, during the 2013/14 and 2014/15 crop seasons, and another in Formigueiro, RS, during the 2013/14 crop season. A randomized block experimental design with four replications was used. The treatments were: sowing using an offset double disc (T1); sowing using a fluted coulter disc (wavy disc with 12 waves) (T2); sowing with a knife runner opener (T3); sowing with a knife runner opener + press wheel mechanism for ground levelling (T4); sowing using a furrow opener upon a raised bed (T5); and chisel plough + sowing using an offset double-disc (T6). In the 2014/15 growing season, the T4 factor was changed using a knife runner opener 0.05 m from the planting row. A smaller reduction in the compacted subsurface soil layer was observed for both T1 and T2, which exhibited high soil bulk density values for the 2013/14 and 2014/15 crop seasons. Furthermore, T3, T5 and T6 led to a reduction in bulk density, and increasing total porosity and macroporosity in the soil, which consequently increased water infiltration, water storage capacity, and crop yield in areas with the presence of a compacted subsurface soil layer.

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Estimation of water retention and availability in soils of Rio Grande do Sul

Cited by 117 publications

References 33 publications

Seasonal changes in soil physical properties under long-term no-tillage

Seasonal changes in soil physical properties under long-term no-tillage

Pedotransfer functions for water retention in different soil classes from the center-southern Rio Grande do Sul State

Soybean Tillage Systems and Physical Changes in Surface Layers of Two Albaqualf Soils

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