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| Silva,Vicente de PR da; Sousa,Inajá Francisco de; Tavares,Alexandra L; Silva,Thieres George F da; Silva,Bernardo B da; Holanda,Romildo M de; Brito,José Ivaldo B de; Braga,Célia C; Souza,Enio P de; Silva,Madson T. |
| ABSTRACT The water scarcity is expected to intensify in the future and irrigation becomes an essential component of crop production, especially in arid and semiarid regions, where the available water resources are limited. Four field experiments were carried out at tropical environment in Brazil in 2013 and 2014, in order to evaluate the effect of planting date on crop evapotranspiration (ETc), crop coefficient (Kc), growth parameters and water use efficiency (WUE) of coriander (Coriandrum sativum) plants. The planting dates occurred during winter, spring, summer and autumn growing seasons. ETc was obtained through the soil water balance method and the reference evapotranspiration (ETo) through the Penman-Monteith method, using data collected from an... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coriandrum sativum; Soil water balance; Irrigation; Penman-Monteith approach. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362018000400446 |
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| Morais,José E. F. de; Silva,Thieres G. F. da; Queiroz,Maria G. de; Araújo,Gherman G. L. de; Moura,Magna S. B.; Araújo Júnior,George do N.. |
| ABSTRACT The knowledge on soil water dynamics is the basis of crop water management. The soil water balance (SWB) method is used for this purpose. However, its application in cactus may lead to misinterpretation in water efficiency analysis, since it does not consider the amount of water retained in the plant (WRP). This study aimed to evaluate SWB applicability, hydrodynamic changes and water efficiency of forage cactus clones under irrigation. The clones ‘Orelha de Elefante Mexicana’ (OEM), ‘IPA Sertânia’ (IPA) and ‘Miúda’ (MIU) were submitted to irrigation depths (2.5, 5.0 and 7.5 mm) and frequencies (7, 14 and 28 days), in Serra Talhada, PE, Brazil, between March 2012 and August 2013. The SWB was applied, by adding the WRP in the estimate of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Water retained in the plant; Soil water balance; Cactus; Modelling. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000400273 |
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| Petry,Mirta T.; Basso,Laudenir J.; Carlesso,Reimar; Armoa,Maria S.; Henkes,Jonas R.. |
| ABSTRACT Evaluating the impacts of water stress on crop yield allows comparing irrigation management alternatives, aiming to ensure an economic return for the irrigated farms. Thus, the main objectives of this study were to model the soil water balance, deriving the crop coefficients, grain yield prediction, and economic return of soybean grown at different levels of water deficit and price quotations. The experiment was carried out under a rainout shelter, using four irrigation water managements. Irrigations were applied when the soil available water in the root zone reached 75%, 64%, 60%, and 50% of the total available water (TAW). Crop and soil parameters were monitored throughout the crop season. The SIMDualKc model was used to simulate the soil water... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycine max; Soil water balance; SIMDualKc model; Economic return. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000400526 |
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| Tironi,Luana F.; Streck,Nereu A.; Gubiani,Paulo I.; Benedetti,Rômulo P.; Freitas,Charles P. de O. De. |
| ABSTRACT The objective of this study was to propose a model, named Simanihot, for simulating growth, development and yield of tuberous roots in cassava, with a choice of two soil water balance models. The model works on a day time step and is calibrated for five cassava cultivars (Fepagro –RS 14, Estrangeira, Cascuda, São José e Paraguaia), with different branching habits and different purpose of use (pasture, food and industry). The model has a graphical interface, where the user can choose one out of two soil water balance models, depending upon the number of known soil variables and details the user wants to know about soil water content. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Manihot esculenta; Modeling; Software; Soil water balance. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000300471 |
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| Carvalho,Daniel Fonseca de; Oliveira Neto,Dionizio Honório de; Felix,Luiz Fernando; Guerra,José Guilherme Marinho; Salvador,Conan Ayade. |
| ABSTRACT: The aim of the present study was to evaluate the effect of different irrigation depths on the yield, water use efficiency (WUE), and yield response factor (Ky) of carrot (cv. 'Brasília') in the edaphoclimatic conditions of Baixada Fluminense, RJ, Brazil. Field trials were conducted in a Red-Yellow Argisol in the 2010-2011period. A randomized block design was used, with 5 treatments (depths) and 4 replicates. Depths were applied by drippers with different flow rates, and the irrigation was managed by time domain reflectometry (TDR) technique. The reference (ETo) and crop (ETc) evapotranspiration depths reached 286.3 and 264.1mm in 2010, and 336.0 and 329.9mm in 2011, respectively. The root yield varied from 30.4 to 68.9t ha-1 as a response to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Daucus carota; Crop water requirement; Soil water balance; TDR; Organic production. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000701145 |
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