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| Bruno,Isabeli Pereira; Silva,Adriana Lúcia da; Reichardt,Klaus; Dourado-Neto,Durval; Bacchi,Osny Oliveira Santos; Volpe,Clóvis Alberto. |
| The use of climatological water balances in substitution to complete water balances directly measured in the field allows a more practical crop management, since the climatological water balances are based on data monitored as a routine. This study makes a comparison between these methods in terms of estimatives of evapotranspiration, soil water storage, soil available water, runoff losses, and drainage below root zone, during a two year period, taking as an example a coffee crop of the variety Catuaí, three to five years old. Climatological water balances based on the estimation of the evapotranspiration through the methods of Thornthwaite and Penman-Monteith, can reasonably substitute field measured balances, however underestimating the above mentioned... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Evapotranspiration; Soil water storage; Available water; Water deficit; Water excess. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000300001 |
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| Varón-Ramírez,Viviana Marcela; Camacho-Tamayo,Jesús Hernán; González-Nivia,Janeth. |
| ABSTRACT The physical characteristics of the soil are defined through the interaction between its properties, and they, in turn, can indicate its physical quality. The study area is located in the Centro Agropecuário Marengo (Marengo Agricultural Center), with an extension of 94.5 ha, subdivided into 17 plots. The objective of this research was to study characteristics such as water storage capacity, structure, consistency, and soil compaction in the two surface horizons (H1 and H2), in order to define management zones through the soil index. Properties such as soil penetration resistance were an indicator of soil degradation, with values higher than 2 MPa in 13 plots. The total porosity exhibited medium or low values in the H1 and H2 horizons, with a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil degradation; Soil compaction; Soil water storage; Soil index.. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542018000300248 |
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| Souza, Jorge Luiz Moretti; Fezer, Kharyn Freitas; Gurski, Bruno César; Jerszurki, Daniela; Pachechenik, Paulo Eugênio. |
| This study aimed to quantify and compare water balance components over the course of a year for different Pinus taeda planting densities in an oxisol in southern Brazil. This experiment was conducted on 6-year-old trees in a clay oxisol at the Monte Alegre Farm, a property of the Klabin Company. The experimental design was a randomized block with four replicates and five treatments with different amounts of soil coverage: T100 (100% coverage - standard planting coverage); (T75, 75; T50, 50; and T25, 25%), and; T0 (without cover - clearcutting). The soil water storage and actual evapotranspiration under non-standard conditions were determined in a weekly estimated soil water balance (SWB) with measured components. By the end of the year, the treatments had... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 5.02.05.01-3 exotic forest; Spacing; Hydric relations; Soil water storage; Hydric consumption Hidrologia florestal. |
| Ano: 2016 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/26607 |
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| Silva,Adriana L. da; Bruno,Isabeli P.; Reichardt,Klaus; Bacchi,Osny O. S.; Dourado-Neto,Durval; Favarin,José L.; Costa,Flávio M. P. da; Timm,Luis C.. |
| Basic information for a rational soil-water management of the coffee crop is still insufficient, particularly under irrigated conditions. Of great importance for the estimation of water requirements of coffee crops are their root distribuition and evapotranspiration crop coefficients. This study compares soil water extraction by roots of coffee plants of the variety "Catuaí Vermelho" (IAC-44), grown in Piracicaba, SP, Brazil, 3 to 5 years old, with direct measurements of root dry matter, showing a good agreement between both approaches, and confirming that most of the root system is distributed in the top soil layer (0-0.3 m) and that less than 10% of the root system reaches depths greater than 1.0 m. Calculated evapotranspiration crop coefficients are in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Perenial crop; Soil water storage; Water balance. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662009000300006 |
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| Ferreira,S. J. F.; Luizão,F. J.; Ross,S. M.; Biot,Y.; Mello-Ivo,W. M. P.. |
| Soil water storage of Central Amazonian soil profiles in upland forest plots subjected to selective logging (in average, 8 trees or 34, 3 m³ of timber per hectare were removed) was measured in four layers, down to a depth of 70 cm. The study lasted 27-months and was divided in two phases: measurements were carried out nearly every week during the first 15 months; in the following year, five intensive periods of measurements were performed. Five damage levels were compared: (a) control (undisturbed forest plot); (b) centre of the clearing/gap; (c) edge of the gap; (d) edge of the remaining forest; and (e) remaining forest. The lowest values for water storage were found in the control (296 ± 19.1 mm), while the highest were observed (333 ± 25.8 mm) in the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Selective logging; Soil water storage; Upland rain forest; Central Amazonia. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832004000100006 |
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| Silva,Adriana Lúcia da; Roveratti,Renato; Reichardt,Klaus; Bacchi,Osny Oliveira Santos; Timm,Luis Carlos; Bruno,Isabeli Pereira; Oliveira,Julio César Martins; Dourado Neto,Durval. |
| Establishing field water balances is difficult and costly, the variability of their components being the major problem to obtain reliable results. This component variability is presented herein for a coffee crop grown in the Southern Hemisphere, on a tropical soil with 10% slope. It was observed that: rainfall has to be measured with an appropriate number of replicates; irrigation can introduce great variability into calculations; evapotranspiration, calculated as a remainder of the water balance equation, has exceedingly high coefficients of variation; the soil water storage component is the major contributor in error propagation calculations to estimate evapotranspiration; and that runoff can be satisfactorily controlled on the 10% slope through crop... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Component variability; Rainfall; Evapotranspiration; Soil water storage. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162006000200001 |
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| Colombo,Alberto; Alvarenga,Lívia A.; Scalco,Myriane S.; Ribeiro,Randal C.; Abreu,Giselle F.. |
| The increasing demand for water resources accentuates the need to reduce water waste through a more appropriate irrigation management. In the particular case of irrigated coffee planting, which in recent years presented growth with the predominance of drip irrigation, the improvement of drip irrigation management techniques is a necessity. The proper management of drip irrigation depends on the knowledge of the spatial pattern of soil moisture distribution inside the wetted strip formed under the irrigation lines. In this study, grids of 24 tensiometers were used to determine the water storage within the wetted strip formed under drippers, with a 3.78 L h-1 discharge, evenly spaced by 0.4 m, subjected to two different management criteria (fixed irrigation... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Irrigated coffee planting; Tensiometers; Soil water storage. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000200004 |
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