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| Registros recuperados: 163 | |
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| Ferreira dos Santos, José Wibison; Sampaio Reis, Lígia; Dos Santos Dias, Mirandy; Silva dos Santos, Rilbson Henrique; de Assis da Silva, Francisco; de Oliveira Santos, João Paulo. |
| Agricultural productivity in irrigated areas depends on several factors, including the design and maintenance of irrigation systems. Excessive or insufficient applications of water affect plant growth and development, hence agricultural productivity. For this reason, the evaluation of the irrigation system is essential to avoid water loss during application. This study aimed to evaluate the efficiency and uniformity of a subsurface drip irrigation system in sugarcane crops in an area of the company Usina Coruripe, Alagoas, Brazil. For data collection, the flow rates were obtained in four points along the lateral line, in the first dripper, in the drippers located at 1/3 and 2/3 of the lateral line length, and in the last dripper of each operational unit of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Saccharum officinarum L.; Irrigation management; Localized irrigation. |
| Ano: 2022 |
URL: http://periodicosonline.uems.br/index.php/agrineo/article/view/6829 |
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| Silva,Wellington G.; Carvalho,Jacinto A.; Oliveira,Eduardo C.; Lima Júnior,Joaquim A.; Silva,Buno M.. |
| This experiment was conducted in Lavras - state of Minas Gerais (MG), Brazil, in a protected environment, and aims to estimate the irrigation depths that maximize productivity and economic returns in the cultivation of asparagus bean and analyze the economic viability of irrigation management. The experimental delineation was randomized blocks with five treatments and four replications. The treatments consisted of five drip irrigation depths: 40, 70, 100, 130 and 160% of water replacement depth up to field capacity. The depths of water that maximize productivity and economic returns were obtained from the regression model adjusted to productivity data, cost of product relations and water cost. The economic viability was achieved on the benefit/cost ratio... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vigna unguiculata spp. sesquipedalis; Irrigation management; Economic viability; Benefit/cost ratio. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000400007 |
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| Lima,Elvis M. de C.; Carvalho,Jacinto de A.; Viol,Miguel A.; Almeida,Rodrigo C. de; Rezende,Fátima C.. |
| ABSTRACT The study aimed to evaluate the “Gália” melons productive characteristics grown in greenhouse under different irrigation levels, and conducted with and without soil cover by plastic mulching. Experiments I (WC) and II (WtC) were conducted simultaneously in a protected environment, using a completely randomized design (CRD), where plants of Gália melons (Hybrid Nectar cv.) received five levels of water depth defined by 50, 75, 100, 125 and 150% of evapo-transpiration (water requirement), with four replications, differing only by utilization (WC) or not (WtC) of plastic mulching. The results showed that the variables productivity, average weight, length and diameter of the fruits were affected by different levels of water replacement in the soil... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Irrigation management; Protected environment; Productivity. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000100075 |
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| Mendonça,Thaís G.; Silva,Marília B. da; Pires,Regina C. de M.; Souza,Claudinei F.. |
| ABSTRACT Agriculture is one of the segments that most uses water and developments have been made to save irrigation water. Deficit irrigation is a technique that can contribute to production and water saving in agriculture. This study aimed to evaluate the viability of deficit irrigation in tomato production irrigated by subsurface drip in a greenhouse and estimate water saving. The experiment was conducted at the CCA/UFSCar, in Araras, São Paulo, Brazil, with grape tomato cultivation. It consisted of three treatments, 100 % water depth and deficit irrigation (75 and 50 % of water depth), with a randomized block design. Irrigation management was performed using mean soil moisture data collected through TDR probes installed in each treatment. Tomato plants... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: TDR; Water resources; Irrigation management; Water content. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000400453 |
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| Melo,Talyana K. de; Medeiros,José F. de; E. Sobrinho,José; Figueiredo,Vladimir B.; Souza,Paulo S. de. |
| Aiming at contributing to an adequate management of water resources, this study aimed to analyze and compare evapotranspiration (ETc) and crop coefficients (Kc) of melon plants measured by a lysimeter and estimated according to the FAO 56 methodology, in the city of Mossoró, state of Rio Grande do Norte (RN), Brazil. In order to measure ETc, weighing lysimeters with an area of 2.25m² were used, with two repetitions. The Penman-Monteith equation parameterized by FAO was used to estimate the reference evapotranspiration, and crop coefficients were those recommended in FAO-56 Bulletin adjusted to local climatic conditions. The required climatic data and lysimeter measurements were collected by an automatic weather station installed at the site. The results... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cucumis melo L.; Irrigation management; Climatic data. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000500005 |
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| Cotrim,Carlos E; Coelho Filho,Maurício A; Coelho,Eugênio F; Ramos,Márcio M; Cecon,Paulo R. |
| This study aimed to test controlled levels of water deficiency in soil in mango trees, under microsprinkling irrigation, in semi-arid conditions, and to evaluate its effect in the productivity and fruits quality. The deficits were applied in the phases I, II and III of growth of the fruit, during the productive cycles of the mango tree in 2006 and 2007. The experiment in both cases was arranged in an entirely random design with 10 treatments and 3 repetitions, in the year I, and with 8 treatments and 3 repetitions in the year II. The values of soil water potential, of the treatments submitted to regulated deficit irrigation (RDI), were placed in the range of 0 to -0.011 MPa, showing that the soil humidity varied between the saturation and the field... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mango; Irrigation management; Water use optimization. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162011000600003 |
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| Santana,Márcio J. de; Lemos,Leandro B.; Souza,Stefany S. de; Campos,Talita M.; Silva,Flávia M. da; Borges,Rafael D.. |
| The current study intended to determine the optimum water depth, yield and evapotranspiration (ETc) for bean cultivars. The experiment was conducted in the Campus of Unit I of the Triângulo Mineiro Federal Education and Technology Institute in Uberaba, MG, in a completely randomized design with three replications. The treatments consisted of four water-replacing levels in the soil (70, 100, 130 and 160% of the crop evapotranspiration) and four bean cultivars (Pérola, BRSMG Madrepérola, BRSMG Majestoso and IAC Alvorada). The average values of ETc obtained for soil water balance for the cultivars Pérola, BRSMG Madrepérola, BRSMG Majestoso and IAC Alvorada were, respectively, of 5.25 mm day-1, 4.59 mm day-1, 4.54 mm day-1 and 4.77 mm day-1. The water depths... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Irrigation management; ETc; Optimum water depth; Phaseolus vulgaris L. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000600006 |
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| Oliveira,Eduardo C.; Carvalho,Jacinto de A.; Silva,Wellington G. da; Rezende,Fátima C.; Almeida,Willian F. de. |
| The experiment was performed in the experimental area of the Engineering Department Federal University of Lavras, Minas Gerais State, Brazil. It aimed at identifying the adequate irrigation management of the greenhouse-cultivated Japanese cucumber (Cucumis sativus L.). complete randomized design, with four levels of soil water potential (15; 30; 60 e 120 kPa) at two phenological phases (vegetative and reproductive), and 5 replications. Overall, the results showed decrease of yield according to increase of soil water potentials. During the reproductive stage, Japanese cucumber plants were more sensitive to water deficit, resulting in further decrease in yield compared to applied water deficit during the vegetative stage of the culture. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cucumis sativus L.; Greenhouse; Irrigation management. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162011000400006 |
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| Geisenhoff,Luciano O; Pereira,Geraldo M; Lima Junior,Joaquim A. de; Silva,Andre L. Pereira da; Aviz,William L. Carrera de. |
| ABSTRACT Proper irrigation management is important both to enable adequate water supply and to minimize problems with diseases, nutrient leaching and unnecessary water and power wastes. Thus, this study aimed at improving irrigation management in greenhouses. For that reason, we assessed the effect of various water tensions on yield performance of crisphead lettuce, Raider-Plus cv. , grown with mulching. The experiment was conducted in greenhouse at the Federal University of Lavras. Treatments constituted five different soil water tensions, namely 12, 25, 35, 45, and 70 kPa. The results showed that irrigation must be carried out at water soil tension of around 12 kPa to reach satisfying commercial values for both total and commercial yield, 66 and 50 t... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lactuta sativa; Irrigation management; Protected environment; Soil covering. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162016000100046 |
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| Cunha,Fernando F. da; Souza,Ivan P. de; Campos,Washington de O.; Andrade Júnior,Valter C. de; Magalhães,Thiago A.. |
| ABSTRACT In radish production, the choice of proper genotypes and irrigation regime is of great importance to achieve success. In light of this, the current study aimed to evaluate the agronomic performance of a few radish genotypes under different irrigation strategies. The plants were grown in the city of Unaí - MG, in Brazil, under field conditions, and during two cycles, one of 40 days (from February 28 to April 8, 2015) and other of 51 days (from May 9 to June 28, 2015). The experimental design was a randomized block design in a split-plot arrangement with four replications. The treatments consisted of four irrigation strategies (50, 75, 100, and 125% of crop evapotranspiration - ETc) applied by a dripping irrigation system, while subplots consisted... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Horticulture; Irrigation management; Raphanus sativus. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000200182 |
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| Paulus,Dalva; Zorzzi,Ivan Carlos; Rankrape,Fabiana. |
| ABSTRACT Water deficit or water excess can affect development and yield of vegetables. The objective of this study was to evaluate the effect of different soil water stress ranges for Chinese cabbage (Brassica pekinensis) in a protected cultivation. The researches were carried out at the Olericulture Sector of Universidade Federal Tecnologica do Paraná between April and July, 2015 and January and April, 2016. Two Chinese cabbage cultivars were analyzed (Eikoo and Kinjitsu) with four soil water stress range (13-17, 23-27, 33-37 and 43-47 kPa) moments of irrigation indicative parameters. The trial design was completely randomized, with four replications, in a factorial scheme. For head fresh mass, a soil stress range of 13-17 kPa resulted in higher yield... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brassica pekinensis; Tensiometry; Irrigation management; Water deficit. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362019000300309 |
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| Viana,Jonathan dos S; Palaretti,Luiz Fabiano; Sousa,Vinicius M de; Barbosa,José de A; Bertino,Antonio Michael P; Faria,Rogério T de; Dalri,Alexandre B. |
| ABSTRACT Collard is a vegetable widely consumed in Brazil. However, the quality and production of this vegetable depend on the supply and quality of water. Water stress and saline stress can make it impossible to grow. The objective of this study was to evaluate the performance of morphophysiological characteristics of collard cv. Georgia under irrigation levels and saline indices after the first defoliation.The experiment was conducted in a greenhouse, under random blocks design, and the treatments consisted of combinations of five water electrical conductivities (CEi in dS m-1: C1 =0.80; C2 =1.30; C3 = 1.80; C4 = 2.30; C5 = 2.80) and four irrigation levels based on the vase capacity (PwC: L1 = 55%; L2 = 70%; L3 = 85%; L4 = 100%), with four replications.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brassica oleracea var. acephala; Leafy vegetable; Brackish water; Irrigation management. |
| Ano: 2021 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362021000100079 |
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| Marques,Patricia Angélica A; Fonseca,Mário Alberto L; Baldotto,Pedro V. |
| The effect of lettuce as cover crop was evaluated on sprinkler irrigation uniformity and parameters of efficiency. The experiment was carried out in field at the Universidade do Oeste Paulista, in Presidente Prudente, São Paulo, Brazil, from August to October, 2006. One treatment was performed on bare soil and the other using lettuce cultivar Vera as cover crop, at the end of the cycle. The average water depth, application rate, uniformity of distribution coefficient, Christiansen uniformity coefficient, Hawaiian uniformity coefficient, as well as the statistical uniformity coefficient were evaluated. The following plant spacing were simulated: 12 x 12, 12 x 18, and 18 x 18 m. The highest water depth retained with lettuce crop cover, at the end of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lactuca sativa L; Irrigation assessment; Irrigation management. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362009000300022 |
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| PINTO, J. M.. |
| A limitação de recursos hídricos dificulta a produção de alimentos em regiões semiáridas, com distribuição irregular de precipitações pluviométricas. Dessa forma, a otimização desses recursos, captando água de chuva para uso doméstico, para a criação de animais e para a produção de alimentos se torna uma necessidade premente. Outra alternativa é utilizar a água armazenada em pequenas bacias de captação (lagoas, barreiros, pequenos açudes) que se formam durante o período chuvoso para cultivos de hortas e pomares. No caso de hortaliças, com espaçamentos pequenos entre plantas, deve-se molhar uma faixa contínua do solo, enquanto em fruteiras, com plantas de maior porte, recomenda-se molhar manchas de solo, aplicando-se uma quantidade menor de água por área,... |
| Tipo: Artigo de divulgação na mídia (INFOTECA-E) |
Palavras-chave: Convivência com o semiárido; Pequena irrigação; Irrigação Localizada; Irrigação Subterrânea; Irrigação Suplementar; Equipamento de Irrigação; Água de Irrigação; Irrigation; Irrigation management; Irrigation systems; Irrigation water; Runoff irrigation. |
| Ano: 2017 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1098844 |
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| COELHO, E. F.; SILVA, T. S. M. da; SILVA, A. J. P. da; PARIZOTTO, I.; SANTANA JUNIOR, E. B.. |
| A maior parte da produção na agricultura familiar da região semiárida do Nordeste brasileiro fica restrita aos períodos chuvosos bastante curtos e cada vez mais incertos. Outra parte menor é obtida em áreas irrigadas, mas, de um modo geral, a aplicação de água é feita de uma forma incorreta, seja pecando por excesso quando a água disponível é abundante ou por deficiência quando há maior rigor na disponibilização da água. Em ambas as situações há perdas envolvidas que afetam o sucesso da produção agrícola a curto, médio e longo prazo. Diante disso, e considerando as crescentes incertezas climáticas anuais e os riscos cada vez maiores da ocorrência de longos períodos de deficiência hídrica com a continuidade da tendência do aquecimento global, tornam-se... |
| Tipo: Documentos (INFOTECA-E) |
Palavras-chave: Manejo de irrigação; Irrigação; Agricultura familiar; Irrigation; Irrigation management. |
| Ano: 2013 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/971173 |
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| JUSTINO, L. F.; ALVES JÚNIOR, J.; BATTISTI, R.; STONE, L. F.; HEINEMANN, A. B.. |
| O estudo visou quantificar o retorno econômico proporcionado pela irrigação suplementar do feijoeiro na época das águas. A produtividade do feijoeiro foi simulada para 30 anos no modelo de cultura Cropgro-Dry Bean para a cultivar Pérola, considerando as datas de semeadura de 1º de novembro a 1º de janeiro e quatro manejos hídricos: sem irrigação; irrigação com 70%, 50% e 30% do total de água disponível no solo (TAD). As irrigações a 70%, 50% e 30% do TAD aumentaram a produtividade em 26,7% a 41,4%; 5,5% a 14,5%; e 0,4% a 2,4% , respectivamente . A demanda média foi de 53 mm ciclo-1 no manejo de 70% do TAD e de 19 mm ciclo-1 no de 50% e de 30%, sem necessidade de irrigação na maioria das estações de cultivo. O atraso na semeadura em relação a 1º de novembro... |
| Tipo: Folhetos |
Palavras-chave: Feijão; Phaseolus Vulgaris; Risco Climático; Modelo de Simulação; Análise Econômica; Manejo; Irrigação; Método de Irrigação; Rendimento; Irrigation management; Climate models; Economic analysis; Crop models; Yields; Beans. |
| Ano: 2022 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1140955 |
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| PINTO, J. M.; YURI, J. E.; COSTA, N. D.; CORREIA, R. C.; CALGARO, M.. |
| A necessidade de produzir alimentos saudáveis no entorno do Lago de Sobradinho, preservando-se os recursos naturais, solo e água, levou a Companhia Hidroelétrica do São Francisco (Chesf) afirmar uma parceria com a Embrapa para a execução de um projeto contemplando, tanto a agricultura irrigada quanto a agricultura de sequeiro, com a fi nalidade de orientar os produtores dos municípios da margem do Lago de Sobradinho a adotar tecnologias específi cas a cada tipo de atividade agropecuária. Um dos objetivos desse projeto foi implantar e recomendar um sistema de produção de cebola (Allium cepa L.) sustentável, com o uso da irrigação localizada por gotejamento. Na região do Lago de Sobradinho, tradicionalmente, o cultivo de cebola é realizado em sulcos de infi... |
| Tipo: Documentos (INFOTECA-E) |
Palavras-chave: Irrigação por superfície; Lago do Sobradinho; Projeto Chesf; Hortaliça de Bulbo; Cebola; Adubação; Fertirrigação; Irrigação; Irrigação por Gotejamento; Onions; Irrigation management; Fertilizer application. |
| Ano: 2018 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1103578 |
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| Registros recuperados: 163 | |
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