Consulta: subjectFacets:"Trickle irrigation"
Registros recuperados: 17
Data/hora: 09/06/2024 05:52:46

Backpressure effects on the flow-pressure relation of driplines
Provedor de dados: 70
Autores: Thebaldi,Michael S; Lima,Luiz A; Almeida,Willian F. de; Andrade,Rafaella R.
ABSTRACT For drip irrigation design and management, it is necessary to know the relation between flow and pressure acting on emitters. In the case of subsurface drip irrigation, the backpressure phenomenon may change the hydraulic characteristics of emitters. Thus, this study aimed at determining such relationship between flow and pressure of different driplines in surface and subsurface conditions; aiming to find possible differences in hydraulic behavior. We tested four emitter types; two pressure compensating (D5000 and Hydro PCND) and two non-pressure compensating (TalDrip and Jardiline). Emitter flow rates were attained in atmospheric conditions and submerged in water, in which submergence levels represented backpressure. Assays were performed using...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Discharge exponent; Proportionality constant; Trickle irrigation.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162016000100055

CALCIUM NITRATE CONCENTRATIONS IN FERTIGATION FOR ‘TERRA’ BANANA PRODUCTION
Provedor de dados: 70
Autores: Andrade Neto,Torquato M. De; Coelho,Eugênio F.; Silva,Ana Carina P. Da.
ABSTRACT The aim of this study was to evaluate the effect of calcium nitrate concentration of irrigation water on soil chemical attributes and productivity during the first ‘Terra’ banana crop cycle. The experiment followed a completely randomized design with six treatments and five replications, with six plants per plot. Treatments consisted in the use of three calcium nitrate concentrations (3.0, 10.0 and 13.0 g.L−1), applied via dripping and micro-micro-sprinkling irrigation. The results showed that the soil chemical properties under fertigation are influenced by the water and nutrient delivery system. There was a linear tendency of increase in electrical conductivity of the saturation extract and soil solution with the increase in calcium nitrate...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil solution; Saturation extract; Electric conductivity; Trickle irrigation.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000200385

Effect of trickle irrigation on root development of the wet bulb and 'pera' orange tree yield in the state of São Paulo, Brazil
Provedor de dados: 70
Autores: 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

ESTIMATION OF THE KINETIC HEAD COEFFICIENT (k) BASED ON THE GEOMETRIC CHARACTERISTICS OF EMITTER PIPES
Provedor de dados: 70
Autores: Flores,José H. N.; Rettore Neto,Osvaldo; Faria,Lessandro C.; Timm,Luís C.
ABSTRACT: The objective of this study was to determine the variability of the head loss as a function of the emitter geometry as well as to develop a relation between local head loss caused by the emitter insertion and geometric characteristics of the emitter pipe, using index of obstruction for dripper pipes with non-coaxial emitters. For this, an experimental bench was developed to control the system and obtain the variables pertinent to the study. From the value of the total head loss in the emitter pipe and the value obtained with calculation of the distributed head loss in the pipe, the difference of these values was local head loss caused by the insertion of the emitter. Total head loss in the emitter pipe and local head loss on the emitter presented...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Non-coaxial emitters; Obstruction index; Trickle irrigation; Head loss.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000601091

Producao de sementes de melao sob irrigacao por sulco e gotejo no Vale do Sao Francisco.
Provedor de dados: 14
Autores: 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: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Irrigacao por gotejo; Oxissolo; Seed; Trickle irrigation; Soils; Melon.; Melão; Cucumis Melo; Semente.; Melons.
Ano: 1977
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/133801

Monitoramento do manejo de agua na cultura da videira ao nivel de campo sob irrigacao por gotejamento.
Provedor de dados: 14
Autores: 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: Outras publicações técnicas (INFOTECA-E)
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

Improving Vegetable Productivity in a Variable and Changing Climate
Provedor de dados: 30
Autores: de la Peña,R.
Palavras-chave: Tolerance; Genes; Climatic change; Grafting; Rootstocks; Drought stress; Vegetable products; Trickle irrigation; Genomes; Temperature.
Ano: 2007
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3331

Performance of pressure-compensating emitters using treated sewage effluent for irrigation
Provedor de dados: 91
Autores: 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

Potassium estimation in the soil solution based on electrical conductivity and soil water content
Provedor de dados: 91
Autores: Andrade Neto,Torquato M. de; Coelho,Eugênio F.; Santana,José A. do V.; Santana Júnior,Edvaldo B.; Alves,Márcio da S.
The objective of this work was to evaluate and to validate models for estimating potassium in the soil solution as a function of bulk electrical conductivity (ECw), soil water content (q) and a soil solution electrical conductivity (ECss). Treatments consisted of using three concentrations of injecting solution of potassium chloride (1.0, 2.5 and 4.0 g L-1) which were applied by two trickle irrigation systems (microsprinkler and drip) during the first cycle of the banana crop cv. Terra Maranhão. Results showed that it is feasible to estimate potassium concentration in the soil solution from data of ECss and q obtained by time domain reflectometry (TDR) using an equation that combined a linear and a potential model. The estimated values of potassium...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: TDR; Trickle irrigation; Fertirrigation.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662012000600005

Flow rate dynamics of pressure-compensating drippers under clogging effect
Provedor de dados: 91
Autores: 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

Vegetative growth and yield of strawberry under irrigation and soil mulches for different cultivation environments
Provedor de dados: 63
Autores: 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 &amp;times; Ananassa Duch.; Trickle irrigation; Water management; Greenhouse.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162006000500001

Water levels and soil mulches in relation to strawberry diseases an yield in a greenhouse
Provedor de dados: 63
Autores: 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

Chemical treatment to unclogg dripper irrigation systems due to biological problems
Provedor de dados: 63
Autores: Ribeiro,Túlio Assunção Pires; Paterniani,José Euclides Stipp; Coletti,Christiane.
Many producers use drippers for trickle irrigation systems for flower production in the field and in protected environments. A frequent problem in this type of irrigation system is the clogging of drippers, which is directly related to water quality and filtering system efficiency. The objective of this study was to conduct an experimental investigation to evaluate the efficiency of using nitric acid and sodium hypochlorite to unclogg drippers due to the use of water with high algae content. The evaluation was conducted in six, 4216 m² greenhouses, each with two sectors comprised of ten spaces or lines, totaling 12 sectors of a dripper irrigation system in a rose producing property of Holambra, State of SP, Brazil. Chemical and physical analyses and the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Trickle irrigation; Uniformity evaluation; Chlorinate; Water quality.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000100001

Irrigation frequency and substrate volume effects in the growth and yield of tomato plants under greenhouse conditions
Provedor de dados: 63
Autores: Pires,Regina Célia de Matos; Furlani,Pedro Roberto; Ribeiro,Rafael Vasconcelos; Bodine Junior,Décio; Sakai,Emílio; Lourenção,André Luiz; Torre Neto,André.
Tomato cropping (Solanum lycopersicum L.) under protected cultivation using substrates and drip fertigation has improved sustainable production systems especially fruit quality and plant health. However, little is known for tomato plants when considering the interaction between substrate volume and irrigation frequency. The aim of this study was to evaluate the effects of coconut (Cocos nucifera L.) fiber substrate volumes and drip irrigation frequencies on the vegetative growth and fruit yield of tomato plants under greenhouse conditions. The experimental design consisted of randomized blocks arranged in a 3 × 2 factorial with four replicates. Treatments consisted of three substrate volumes (5.0; 7.5 and 10.0 L per plant) and two irrigation frequencies...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Solanum lycopersicum L.; Fertigation; Gas exchange; Trickle irrigation; Water management.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000400002

Modeling for predicting soil wetting radius under point source surface trickle irrigation
Provedor de dados: 111
Autores: 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

Modeling for predicting soil wetting radius under point source surface trickle irrigation
Provedor de dados: 111
Autores: 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...
Palavras-chave: Trickle irrigation; Wetted radius; Simple heuristic model.
Ano: 2013
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/1829

Non-pressure compensating emitters using treated sewage effluent for irrigation
Provedor de dados: 65
Autores: 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