scholarly journals Optimized Regulated Deficit Irrigation Management for Watermelon Cultivation in a Semiarid Region

2021 ◽  
Vol 9 (2) ◽  
pp. 113
Author(s):  
Kelly Nascimento Leite ◽  
Daniel Fonseca de Carvalho ◽  
Jose Maria Tarjuelo Martin- Benito ◽  
Geocleber Gomes de Sousa ◽  
Alfonso Dominguez Padilla
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Water Scarcity ◽  
Deficit Irrigation ◽  
Irrigation Management ◽  
Control Treatment ◽  
Water Volume ◽  
Semiarid Region ◽  
Regulated Deficit Irrigation ◽  
Use Efficiency

The present study aimed to validate the MOPECO crop simulation model and to determine a viable irrigation management for watermelon in the semiarid region of Northeast Brazil, using methodologies of optimized regulated deficit irrigation (ORDI) and constant deficit irrigation (CDI). The experiment was carried out during October to December 2013 and the second one from July to August 2014 in plots of land of producers in the Baixo Acaraú Irrigated Perimeter – Ceará, Brazil. Treatments were characterized by ORDI management (70, 80, 90% ETa/ETm ratio) and CDI management along the entire cycle (70, 80 and 90% ETm) and control treatment, irrigated with 100% of the water requirement of the crop (ETm). In terms of saving of water resources, the results showed that management with regulated deficit irrigation leads to favorable and economically viable results for the farmer, of water saving, especially in a situation of severe water scarcity, irrigation management with regulated water deficit (ORDI) can provide favorable and economically viable results for the farmer. The highest value of WUE (41.8 kg m-3) was obtained with the treatment of lowest water volume applied (352.1 L) in the second experiment, decreasing with the increase in the water volume used. The ORDI methodology represents a better water use efficiency for all treatments of deficit applied compared to CDI treatments. The difference of ORDI and CDI methodology provided an increase of up to 200% in the gross margin obtained with the exploration of the watermelon culture which represents a range of R$ 986.00 in profit in a situation of water scarcity, as in the case of the studied region, the strategy with water supply of 70% of ETa/ETm ratio regulated by phenological stage was recommended in order to obtain highest water use efficiency.

scholarly journals PRODUÇÃO E EFICIÊNCIA DE USO DA ÁGUA EM CULTIVARES DE BANANEIRA SOB IRRIGAÇÃO COM DÉFICIT CONTROLADO

Irriga ◽  
2021 ◽  
Vol 26 (1) ◽  
pp. 94-110
Author(s):  
Eugênio Ferreira Coelho ◽  
Marcelo Rocha dos Santos ◽  
Sérgio Luiz Rodrigues Donato ◽  
João Batista Ribeiro da Silva Reis ◽  
Ariane Castricini
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Deficit Irrigation ◽  
Irrigation Management ◽  
Fruit Size ◽  
Minas Gerais ◽  
Regulated Deficit Irrigation ◽  
Musa Spp ◽  
Use Efficiency ◽  
E Mail

PRODUÇÃO E EFICIÊNCIA DE USO DA ÁGUA EM CULTIVARES DE BANANEIRA SOB IRRIGAÇÃO COM DÉFICIT CONTROLADO     EUGÊNIO FERREIRA COELHO1; MARCELO ROCHA DOS SANTOS2; SÉRGIO LUIZ RODRIGUES DONATO2; JOÃO BATISTA RIBEIRO DA SILVA REIS3 E ARIANE CASTRICINI3   1 Pesquisador, PhD, Embrapa Mandioca e Fruticultura, R. Embrapa, s/n – CEP: 44380-000 – Cruz das Almas, BA – Brasil, E-mail: eugenio.coelho@embrapa,br 2 Professor, Doutor, Instituto Federal de Educação, Ciência e Tecnologia Baiano Campus Guanambi, Zona Rural, Distrito de Ceraíma, CEP: 46.430-000 – Guanambi, BA – Brasil, E-mail: [email protected], [email protected]  3 Pesquisador, Doutor, Empresa de Pesquisa Agropecuária de Minas Gerais, Rod. MGT 122, km 155 – CEP: 39525-000 – Nova Porteirinha, MG – Brasil, E-mail: [email protected], [email protected]     1 RESUMO   Objetivou-se com este trabalho avaliar a produtividade, a eficiência de uso da água e o tamanho dos frutos de diferentes cultivares de bananeira sob irrigação com déficit controlado no norte de Minas Gerais. O experimento foi conduzido no quarto ciclo de produção de bananeiras ‘Grande Naine’, ‘Galil-18’ (FHIA-18), ‘BRS Platina’, ‘Prata-Anã’ e ‘BRS Princesa’. A irrigação com déficit controlado (RDI) de 70 e 50% da evapotranspiração da cultura (ETc) foi realizada em um, dois ou três períodos de julho de 2016 a julho de 2017. Independentemente das cultivares, a altura da planta foi reduzida quando aplicado dois déficits de 50% da ETc, já a área foliar aumentou quando aplicados RDI em um período, RDI com 70% da ETc em dois períodos e RDI com 50% da ETc em três períodos. A RDI de até 50% da ETc em três períodos durante o ciclo da cultura não causa redução na produtividade em nenhuma cultivar avaliada, comparada à irrigação plena. A RDI com 70% da ETc em apenas um período, entre novembro e fevereiro, período chuvoso, possibilitou maior produtividade e maior eficiência de uso da água na ‘Grande Naine’, formando mesmo agrupamento com a ‘BRS Princesa’ e a ‘Prata-Anã’.   Palavras-chave: Musa spp., manejo da irrigação, semiárido.     COELHO, E. F.; SANTOS, M. R.; DONATO, S. L. R.; REIS, J. B. R. S.; CASTRICINI, A. PRODUCTION AND WATER USE EFFICIENCY IN BANANA CULTIVARS UNDER REGULATED DEFICIT IRRIGATION     2 ABSTRACT   This work aimed to evaluate the productivity, water use efficiency and fruit size of different banana cultivars under regulated deficit irrigation in the north of Minas Gerais. The experiment was conducted in the fourth cycle of banana production ‘Great Naine’, ‘Galil-18’ (FHIA-18), ‘BRS Platinum’, ‘Prata-Anã’ and ‘BRS Princesa’. Regulated deficit irrigation (RDI) of 70 and 50% of crop evapotranspiration (ETc) was conducted in one, two or three periods from July 2016 to July 2017. Regardless of cultivars, plant height was reduced when two 50% ETc deficits were applied, whereas leaf area increased when RDI was applied in one period, RDI with 70% ETc in two periods and RDI with 50% ETc in three periods. RDI of up to 50% of ETc in three periods during the crop cycle does not reduce yield in any evaluated cultivar compared to full irrigation. The RDI with 70% of ETc in only one period, between November and February, rainy season, enabled higher productivity and greater water use efficiency in ‘Grande Naine’, forming even grouping with ‘BRS Princesa’ and ‘Prata- Anã’.   Keywords: Musa spp., irrigation management, semi-arid.

scholarly journals Strategic irrigation management in Australian vineyards

OENO One ◽  
2001 ◽  
Vol 35 (3) ◽  
pp. 129 ◽  
Author(s):  
Peter R. Dry ◽  
B. R. Loveys ◽  
M. G. Mccarthy ◽  
Manfred Stoll
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Fruit Quality ◽  
Irrigation Water ◽  
Vegetative Growth ◽  
Deficit Irrigation ◽  
Irrigation Management ◽  
Regulated Deficit Irrigation ◽  
Use Efficiency ◽  
Partial Rootzone Drying

<p style="text-align: justify;">Regulated Deficit Irrigation (RDI) and Partial Rootzone Drying (PRD) are examples of strategie irrigation management. They have been successfully adopted for winegrape production in Australia with the aim of controlling vegetative growth to produce 'balanced' vines, and to improve both water-use efficiency (measured as tonnes of fruit per ML of irrigation water applied) and fruit quality for winemaking. This paper will outline some of the physiological principles that underpin these strategies and provide details of experimental and commercial experience in Australian vineyards.</p>

Increasing profitability and water use efficiency of triple rice crop production in the Mekong Delta, Vietnam

2015 ◽  
Vol 154 (6) ◽  
pp. 1015-1025 ◽  
Author(s):  
P. P. NHẪN ◽  
L. V. HÒA ◽  
C. N. QUÍ ◽  
N. X. HUY ◽  
T. P. HỮU ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Water Level ◽  
Water Use ◽  
Water Scarcity ◽  
Irrigation Management ◽  
Ground Surface ◽  
Mekong Delta ◽  
Rice Production ◽  
Use Efficiency ◽  
Cropping Seasons

SUMMARYRice production in the Mekong Delta, Vietnam is threatened by future water scarcity caused by changing rainfall patterns and increasing irrigation costs. To improve resilience of the triple rice farming system to future climate-related stresses, profitability needs to be increased through water use efficiency, fertilizer management and planting methods.During four cropping seasons in 2011–13, alternate wetting and drying (AWD) irrigation was applied in the triple rice production area within An Giang Province, Vietnam. An issue with the application of AWD is the prevalence of acid sulphate soils in the Mekong Delta. Three types of irrigation management were tested; continuously flooded (CF) where the water in the paddy was maintained at 5 cm; AWD where the water level was allowed to fall to 15 cm below the ground surface, at which point the field was irrigated until the water level was at 1 cm above the ground surface (designated −15 cm); AWD where the water level was allowed to fall to 30 cm below the ground surface before irrigation until the water level was at 1 cm above the ground surface (designated −30 cm). Two further experiments were also undertaken which examined the planting method (transplant v. direct sowing) and phosphorus rate on rice yield. There was no effect on yield caused by P fertilizer rate and irrigation management in any year, and there was no significant effect on soil pH or salinity caused by irrigation management. Overall net profitability was greatest for the AWD treatments because of the reduction in pumping and labour costs in the dry season. Transplanted rice improved yields, but the labour cost reduced overall profitability. The study shows that AWD (−15 cm) can be safely applied in acid sulphate soil areas within the triple rice areas of An Giang Mekong Delta and saved at least 0·27 of total irrigated water quantity used during three of the six cropping seasons. The increased profitability of the AWD rice production system will help to improve the resilience of triple rice cropping systems to future water scarcity.

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