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| Registros recuperados: 11 | |
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| Bastos,Edson A.; Silva,Cláudio R.; Rodrigues,Braz H. N.; Andrade Jr.,Aderson S.; Ibiapina,Lívia M. M.. |
| The knowledge of the evapotranspiration (ETc) and crop coefficient (Kc) is fundamental to plan and to manage the irrigation of any crop. The aim of this study was to determine the daily and hourly evapotranspiration of drip irrigated watermelon (Citrullus Lanatus, var. Crimson Sweet) and crop coefficient (Kc) in each crop development phase. The experiment was carried out in an experimental area of 1.27 ha of Embrapa Mid-North, localized in Parnaíba (02°54'S, 41°47'W and 46 m above of sea), State of Piauí, Brazil, from September to November, 2006. Electronic weighing lysimeters of 1.5 m x 1.5 m wide and long and 1.0 m deep were used to obtain the evapotranspiration. The plants were drip irrigated with a lateral row per plant row and drippers spaced 0.5 m... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Citrullus lanatus; Lysimeter; Water consume. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162012000300017 |
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| Lozano,Cláudia S.; Rezende,Roberto; Freitas,Paulo S. L. de; Hachmann,Tiago L.; Santos,Fernando A. S.; Andrean,André F. B. A.. |
| ABSTRACT The objective of this work was to determine the water consumption and the crop coefficient of melon in a protected environment. The experiment was conducted in a greenhouse at the Technical Center of Irrigation of the State University of Maringá, in Maringá, PR. The melon hybrid used was Sunrise and the irrigations were performed daily by drip irrigation. Crop water requirement was quantified based on its evapotranspiration directly measured through constant water table lysimeters. Weather information was collected in an automatic weather station, installed inside the protected environment, which allowed to calculate the reference evapotranspiration by the Penman-Monteith method. The total water consumption of the melon crop was 295 mm, reaching... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cucumis melo L.; Irrigation; Lysimeter. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017001100758 |
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| Sérvulo,Ana C. O.; Vellame,Lucas M.; Casaroli,Derblai; Alves Júnior,José; Souza,Pedro H. de. |
| ABSTRACT The thermal dissipation probe (Granier method) is useful in the water deficit monitoring and irrigation management of African Mahogany, but its model needs proper adjustment. This paper aimed to adjust and validate the Granier sap flux model to estimate African Mahogany transpiration, measure transpiration using lysimeter and relate it to atmospheric water demand. Weather conditions, transpiration and sap flux were monitored in three units of 2.5-year-old African Mahogany trees in constant water table lysimeter, in Goiânia, GO. Sapwood area (SA), leaf area (LA), transpiration measured by lysimeter (TLYS) and estimated by sap flux (TSF) were evaluated. The SA comprised 55.24% of the trunk’s transversal section. The LA varied from 11.95 to 10.66 m2.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Khaya ivorensis; Sap flux; Transpiration; Lysimeter; Sapwood. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000500322 |
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| Coelho Filho,Maurício Antonio; Angelocci,Luiz Roberto; Campeche,Luís Fernando de Souza Magno; Folegatti,Marcos Vinícius; Bernardes,Marcos Silveira. |
| The stem heat balance method (HBM) measures sap flow (SF) in plants, and can be used to estimate daily transpiration flow. It is a powerful technique for water relations and irrigation field studies, but it has to be tested in species of particular interest. This paper discusses effectiveness of the HBM to estimate transpiration of young acid lime plants (Citrus latifolia Tan. cv. Tahiti), grafted on citrumelo cv. Swingle (Poncirus trifoliata Raf. x C. paradisi Macf.), in the field using commercial gauges (model SAG10-ws, Dynamax Inc., Huston), in Piracicaba, State of Sao Paulo, Brazil. SF was correlated to transpiration determined by weighing lysimeters and by a steady-state null-balance porometer. The mean ratio between daily values of SF and lysimetric... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: SF; Maximum transpiration; Lysimeter; Porometer; Citrus. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000300007 |
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| Fronza,Diniz; Folegatti,Marcos Vinícius. |
| The knowledge of water requirement of crops in the different growing phases elicits higher crop yield and rational use of water resource. The aim of this work was to estimate the water consumption of stevia using two constant watertable microlysimeters. The research was conducted in San Piero a Grado, Pisa, Italy. The data were collected daily from June, 1st, to October, 22th, 2000. Reference evapotranspiration was determined by the Penman-Monteith-FAO method, in the same period. Microlysimeters watertables level were maintained at the 35 cm depth. Crop evapotranspiration for the total cicle (80 days) was 464 mm. For the most water consuming phase, crop average evapotranspiration was 5.44 mm day-1. The crop coefficient values were 1.45 for the first 25... |
| Tipo: Info:eu-repo/semantics/report |
Palavras-chave: Lysimeter; Water requirement; Evapotranspiration. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000300028 |
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| Dahri, Shahzad Hussain; Mangrio, Munir Ahmed; Mirjat, Muhammad Saffar; Dahri, Saeed Ahmed; Aqulani, Zaheer Ahmed; Jakhrani, Jazib Hussain; Aghani, Ghulam Mehdi. |
| This research was intended to determine the groundwater contribution in crop water-use of sesame crop under different water tables depths and to assess the accuracy of CROPWAT model to simulate the evapotranspiration. The method of combining Lysimeters was implemented to investigate seasonal groundwater contribution to crop-water use. The climatic conditions under which crop was grown were monitored, water table depths were maintained (at 1.60 m, 2.0 m and 2.40 m) and all water balance components were measured. The crop coefficient (Kc), ET and reference evapotranspiration (ETo) were determined. The obtained results were compared with the outputs of the CROPWAT model. The results reveals that, the average ET of sesame crop under lysimeter experiment was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lysimeter; CROPWAT; Sesame Crop; Evapotranspiration; Groundwater Use; And Crop Coefficient. |
| Ano: 2021 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6267 |
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| Casanova P,Manuel; Messing,Ingmar; Joel,Abraham; Cañete M,Alberto. |
| This study evaluates five methods to estimate crop evapotranspiration in greenhouse conditions. It compares their performance in relation to the evapotranspiration directly determined from water balance measurements (ETlys) in an irrigated lettuce (Lactuca sativa L.) crop during 9 weeks. Daily values of the reference evapotranspiration (ETo) from Class A pan (CAP), Piche atmometers (ATM), Andersson evaporimeters (ANE), FAO-Radiation (FRE) and FAO-Penman-Monteith (PME) equations were compared. The methods showed similar temporal variations but at different ranges as follows: ANE < CAP < FRE < PME < ATM. Furthemore, ETo had a clear correlation with solar radiation. Crop coefficients (Kc = ETlys/ETo) varied somewhat amongst the methods, but trends... |
| Tipo: Journal article |
Palavras-chave: Evapotranspiration; Greenhouse; Lettuce; Lysimeter. |
| Ano: 2009 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392009000100008 |
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| Registros recuperados: 11 | |
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