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| Registros recuperados: 20 | |
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| Rangavajhala Subbauah; Centre of Excellence on Soil and Water Management, Research Training and Testing Centre, Junagadh Agricultural University, Motibaugh, Junagadh-362 001, Gujarat, India; Harshad Hemrajbhai Mashru; Centre of Excellence on Soil and Water Management, Research Training and Testing Centre, Junagadh Agricultural University, Motibaugh, Junagadh-362 001, Gujarat, India. |
| Irrigation practices that are profligate in their use of water have come under closer scrutiny by water managers and the public. Trickle irrigation has the propensity to increase water use efficiency only if the system is designed to meet the soil and plant conditions. Information on moisture distribution patterns under point source trickle emitters is a pre-requisite for the design and operation of trickle irrigation systems. This will ensure precise placement of water and fertilizer in the active root zone. For many practical situations, detailed information on matric potential or water content distribution within the wetted volume is not necessary and prediction of the boundaries and shape of the wetted soil volume suffice. Simple models are more... |
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Palavras-chave: Trickle irrigation; Wetted radius; Simple heuristic model. |
| Ano: 2013 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/1829 |
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| Subbauah, Rangavajhala; Mashru, Harshad Hemrajbhai. |
| Irrigation practices that are profligate in their use of water have come under closer scrutiny by water managers and the public. Trickle irrigation has the propensity to increase water use efficiency only if the system is designed to meet the soil and plant conditions. Information on moisture distribution patterns under point source trickle emitters is a pre-requisite for the design and operation of trickle irrigation systems. This will ensure precise placement of water and fertilizer in the active root zone. For many practical situations, detailed information on matric potential or water content distribution within the wetted volume is not necessary and prediction of the boundaries and shape of the wetted soil volume suffice. Simple models are more... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Trickle irrigation; Wetted radius; Simple heuristic model. |
| Ano: 2013 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/1829 |
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| Fischer Filho,João Alberto; Dalri,Alexandre Barcellos; Santos,Miquéias Gomes dos; Zanini,José Renato; Faria,Rogério Teixeira de. |
| ABSTRACT: This study aimed to evaluate the obstruction of non-pressure compensating emitters using treated sewage effluent (TSE) for irrigation. A drip irrigation system with six models of emitters (encoded) was installed in level field conditions. TSE coming from a sewage treatment station was used as irrigation water after being filtered through a disc filter (120 mesh). Seven flow rate evaluations of drippers operating at 100kPa were performed (0, 100, 200, 300, 400, 500 and 600h of operation). The experimental design was randomized in a 6×7 factorial arrangement (6 models and 7 times), with four repetitions, and Tukey’s test was used to compare means. Relative flow rate (Qr), the flow rate coefficient of variation (CVQ) and degree of clogging (GE) were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Wastewater; Trickle irrigation; Clogging; Water saving. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000700351 |
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| Pires,Regina C. de M; Bodine Junior,Décio; Sakai,Emílio; Villar,Heloísa L; Silva,Tonny J. A. da; Arruda,Flávio B. |
| The aim of this study was to evaluate the effect of different microirrigation designs on root system distribution in wet bulb region, orange orchard yield and quality of orange fruits. The experiment was installed as random blocks with five treatments and four replicates in an orchard of 'Pêra' orange trees grafted on 'Cleopatra' mandarin rootstock. The treatments consisted of: one drip line (T1), two drip lines (T2), four drip lines (T3) per planting row, microsprinkler irrigation (T4) and without irrigation (T5). Irrigation treatments favored yield and ºBrix. The treatment with a single drip line (T1) showed the greatest quantity of roots in relation to the treatments T2 and T3. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Trickle irrigation; Microsprinkler irrigation; Citrus; Water management. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162011000600007 |
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| SOARES, J. M.; NASCIMENTO, T.; CASTRO NETO, M. T. de; SILVA, D. D. da. |
| Descricao do sistema de irrigacao, avaliacao, resultados, profundidade do solo; espacamento entre plantas, monitoramento do manejo de agua, metodologia, monitoramento dos parametros climaticos e fisiologicos a planta, distribuicao horizontal do sistema radicular, distribuicao vertical de raizes da videira entre plantas, sob irrigacao por gotejamento. |
| Tipo: Parte de livro |
Palavras-chave: Grape; Management; Trickle irrigation; Uva; Água; Irrigação por Gotejamento; Manejo; Grapes; Water. |
| Ano: 1994 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/133440 |
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| LOPES FILHO, F.; COELHO, M. B.; FERREIRA, J. C.. |
| Este trabalho foi conduzido em um solo classificado como oxissolo do Campo Experimental de Bebedouro/EMBRAPA, Petrolina, PE., com o objetivo de comparar a eficiencia dos metodos de irrigacao por sulco e gotejo na producao de sementes de melao (Cucumis melo L.). Para o metodo de gotejo foram estudadas duas frequencias de irrigacao (2 e 5 dias) e tres laminas com base na evaporacao do tanque Classe A (0,50;0,75 e 1,00). No metodo de sulco, somente tres frequencias de irrigacao foram usadas (5, 8 e 10 dias). O delineamento usado foi o de blocos ao acaso com nove tratamentos e quatro repeticoes. De acordo com os resultados obtidos, constatou-se que as melhores producoes de sementes foram alcancadas, quando foi usado o metodo de gotejo com as frequencias de 2 e... |
| Tipo: Folhetos |
Palavras-chave: Irrigacao por gotejo; Oxissolo; Seed; Trickle irrigation; Soils; Melão; Cucumis Melo; Semente; Melons. |
| Ano: 1977 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/133801 |
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| Pinto,Marinaldo F.; Molle,Bruno; Alves,Dinara G.; Ait-Mouheb,Nassim; Camargo,Antonio P. de; Frizzone,José A.. |
| ABSTRACT The clogging dynamics of pressure-compensating drippers is still poorly addressed, and its understanding is quite important to control clogging. The aim of this study was to evaluate the flow performance of pressure-compensating drippers under clogging effect. Eight pressure-compensating emitters, model J-SC Jain PC-PLUS with nominal flow rate of 2.2 L h-1 were evaluated. The tests were run for 8 h d-1 for 4 weeks, a total of 160 h. Every 40 h, the concentration and granulometry of suspended particles were increased, by adding 125 mg L-1 of solids, composed of sand. The flow rate of the emitters was determined using a weight measurement system. Flow rate variations of the emitters did not follow a defined pattern. Clogging seems to occur randomly... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Emitters; Trickle irrigation; Clogging. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000500304 |
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| Fischer Filho,João A.; Oliveira,Vinicius M. R. de; Dalri,Alexandre B.; Zanini,José R.. |
| ABSTRACT This study aimed to evaluate the flow variation of pressure-compensating emitters using treated sewage effluent (TSE). A drip irrigation system with four types of pressure-compensating emitters (G1 - Naan Dan Jain Model Top Drip, G2 - Naan Dan Jain Model Naan PC, G3 - Drip-Plan, G4 - Naan Dan Jain Model Naan Amnon) was installed with TSE from the sewage treatment station, filtered through a disc filter (120 mesh). Seven evaluations of flow rate of the drippers were performed (0, 100, 200, 300, 400, 500 and 600 h of operation) operating at 100 kPa. The experimental design was completely randomized in a 4 x 7 factorial arrangement (4 models and 7 times) with four replicates and Tukey test to compare the means. The relative flow rate (Qr), flow rate... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Wastewater; Trickle irrigation; Clogging; Water saving. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016001000869 |
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| Pires,Regina Célia de Matos; Folegatti,Marcos Vinícius; Passos,Francisco Antonio; Arruda,Flávio Bussmeyer; Sakai,Emílio. |
| The vegetative growth and yield of strawberry in relation to irrigation levels and soil mulches are still not well known, mainly for different environmental conditions. Two experiments were carried out in Atibaia, SP, Brazil, during 1995, one in a protected environment and the other in an open field, to evaluate the cultivar Campinas IAC-2712, under different irrigation levels and soil mulches (black and clear polyethylene). Three water potential levels in the soil were used in order to define irrigation time, corresponding to -0.010 (N1), -0.035 (N2), and -0.070 (N3) MPa, measured through tensiometers installed at the 10 cm depth. A 2 × 3 factorial arrangement was adopted, as randomized complete block, with 5 replicates. In the protected cultivation, the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fragaria × Ananassa Duch.; Trickle irrigation; Water management; Greenhouse. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162006000500001 |
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| Pires,Regina Célia de Matos; Folegatti,Marcos Vinícius; Tanaka,Maria Aparecida de Souza; Passos,Francisco Antonio; Ambrosano,Gláucia Maria Bovi; Sakai,Emilio. |
| The occurrence of diseases and its influence on strawberry yield in a greenhouse as well as its association with water management are still not well known. So, the aim of this work was to evaluate the effect of different water levels and soil mulches on strawberry plant health and yield in a greenhouse. The experiment was carried out at Atibaia, State of São Paulo, Brazil, from April to December 1995. The experimental design was a 2 × 3 factorial, in randomized blocks, with five replications, and consisted of two soil mulches and three water levels. The soil mulches consisted of clear or black plastic. Trickle irrigation was applied whenever the soil water potential reached -10, -35 and -70 kPa at a depth of ten centimeters. Cultivar Campinas IAC 2712 was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fragaria × ananassa Duch.; Water management; Trickle irrigation; Disease. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000600003 |
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| Registros recuperados: 20 | |
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