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| Silva,Vamberto G. de F.; Andrade,Albericio P. de; Fernandes,Pedro D.; Silva,Ivandro de F. da; Azevedo,Carlos A. V. de; Araújo,Jucilene S.. |
| Studies have been carried out on efficient water use in irrigation. The present study evaluates the yield of cotton plants (Gossypium hirsutum L. r. latifolium Hutch), and the use of water for different irrigation strategies. The experiment was conducted under greenhouse conditions, and the cultivar used was CNPA-7H Precocious grown in plastic pots; each pot contained 20 kg of dry soil. The irrigation strategies were selected by taking into account the available water in the soil, the irrigation frequency and the irrigation suppression during flowering and boll development. Water consumption, boll weight, yield, harvest index and water use efficiency were evaluated and the results showed that water consumption resulting from the irrigation strategies used... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Gossypium hirsutum; Phenology; Water availability; Water saving. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662010000500001 |
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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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| Angeli,Karoline P.; Delazari,Fábio T.; Nick,Carlos; Ferreria,Mariane G.; Silva,Derly J. H. da. |
| ABSTRACT Among the determining factors of yield, nitrogen (N) fertilization and the correct supply of water play an important role in the quality and yield aspects of coriander. Therefore, the aim of this study was to evaluate the yield components and the water use efficiency (WUE) in coriander subjected to different depths and N doses. A completely randomized design in split plot was used. Water depths were applied in the plots at the rates of 25, 50, 75, 100 and 125% of the Required Real Irrigation (RRI). N doses were distributed within the subplots at the following proportions: 50, 100 and 150% of the recommendation for the crop (70 kg ha-1). The N dose of 94 kg ha-1 and irrigation depth of 115% of RRI promoted the greatest yield (29.0 t ha-1) and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coriandrum sativum L.; Irrigation management; Water saving; Nitrogen fertilization.. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000500415 |
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| Harby M. S. Mostafa; Dr. of Agricultural Eng.. |
| Abstract: Drip irrigation is one of the most efficient systems in delivering water to the plant root zone but it still allows relatively high evaporation from the saturated zone that develops under emitters especially in clay soils of low infiltration rates. Initial lateral water movement may take a long time in such soils thus exposing surface water to high evaporation. The vertical columns method induces water infiltration keeping the actual water surface deeper in the soil profile. The objective of this research is to compare between the effect of vertical compost and sand columns on the distribution of water in the root zone and the potential for water saving in clay soil. A field experiment was conducted and the... |
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Palavras-chave: Drip irrigation; Vertical mulch; Water saving. |
| Ano: 2014 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2743 |
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| Mostafa, Harby M. S.. |
| Abstract: Drip irrigation is one of the most efficient systems in delivering water to the plant root zone but it still allows relatively high evaporation from the saturated zone that develops under emitters especially in clay soils of low infiltration rates. Initial lateral water movement may take a long time in such soils thus exposing surface water to high evaporation. The vertical columns method induces water infiltration keeping the actual water surface deeper in the soil profile. The objective of this research is to compare between the effect of vertical compost and sand columns on the distribution of water in the root zone and the potential for water saving in clay soil. A field experiment was conducted and the results indicated that the vertical... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Drip irrigation; Vertical mulch; Water saving. |
| Ano: 2014 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2743 |
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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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