Improving agricultural water management in the semi-arid region of Brazil: experimental and modelling study

Montenegro, Suzana; Montenegro, Abelardo Antônio de Assunção; Ragab, Ragab

doi:10.1007/s00271-009-0191-y

Cited by 58 publications

(40 citation statements)

References 23 publications

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“…http://www.water4crops.org/saltmed-2013-integrated-management-tool-water-crop-soil-nfertilizers/ The model has been applied successfully on a field experiment of maize in Syria (Najib et al, 2007), a sugar cane field experiment in Iran (Golabi et al, 2009), on a cotton plantation in Greece (Kalfountzos et al, 2009) and on several field crops in north east of Brazil (Montenegro et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

SALTMED Model as an Integrated Management Tool for Water, Crop, Soil and N‐Fertilizer Water Management Strategies and Productivity: Field and Simulation Study

Ragab

Battilani²,

Matović

et al. 2015

Irrigation and Drainage

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This paper is a follow up from the first paper which described the SALTMED model. In this paper the focus is on the model application using data of tomato and potato from field experiments in Italy, Greece (Crete) and Serbia. Drip full irrigation, drip deficit irrigation, drip as partial root drying (PRD), sprinkler and furrow irrigation were used in three years experiment between 2006 and 2008.In drip irrigated experiments, the drip line was 10 to 12 cm below the surface. Dry matter, final yield, soil moisture and soil nitrogen were successfully simulated. The study showed that there is a great potential for saving water when using subsurface drip, PRD or drip deficit irrigation compared with sprinkler and furrow irrigation. Depending on the crop and irrigation system, the amount of fresh water that can be saved could vary between 14 to 44%. PRD and deficit drip irrigation have proved to be the most efficient water application strategies with the highest water productivity.

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Section: Introductionmentioning

confidence: 99%

SALTMED Model as an Integrated Management Tool for Water, Crop, Soil and N‐Fertilizer Water Management Strategies and Productivity: Field and Simulation Study

Ragab

Battilani²,

Matović

et al. 2015

Irrigation and Drainage

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“…Os autores obtiveram massa de frutos significativamente superior quando se adotou turno de rega diário com cobertura morta de 1 Mg ha -1 de palhada de milho, lâmina correspondente a 80% da evapotranspiração do pimentão, sem provocar aumento da salinidade. Montenegro et al (2010), na área de estudo do presente experimento e através do modelo SALTMED (Ragab, 2002) com água moderadamente salina, verificaram que a adoção de lâmina deficitária (80% ETc) não produziu alteração significativa na produtividade do repolho. Adicionalmente, a adoção de turnos de rega de 1, 2 e 3 dias não provocou alteração significativa na salinidade do solo, não acarretando decréscimo de produtividade.…”

Section: Introductionunclassified

Produtividade do repolho utilizando cobertura morta e diferentes intervalos de irrigação com água moderadamente salina

Carvalho

Montenegro

Soares

et al. 2011

Rev. bras. eng. agríc. ambient.

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RESUMOO manejo da irrigação em áreas sob escassez hídrica é imperativo para o incremento da eficiência do uso da água, particularmente em áreas susceptíveis a salinização e a elevadas demandas atmosféricas. Neste estudo avaliou-se o efeito da cobertura morta e de intervalos de irrigação utilizando-se água moderadamente salina sobre a produtividade do repolho e sobre suas variáveis relacionadas, em vale aluvial no semiárido. O delineamento experimental foi em blocos casualizados em esquema fatorial 3 x 2, com 4 repetições, mediante a aplicação de intervalos de irrigação de 12, 24 e 48 h, com utilização de uma fração de lixiviação de 20%, e presença ou ausência de cobertura morta sobre o solo. Verificou-se que as produtividades foram afetadas pelos intervalos de irrigação e pela presença da cobertura morta. A máxima eficiência uso da água foi obtida aplicando-se o intervalo de irrigação de 12 h com cobertura morta, correspondendo a 110,49 Mg ha -1 mm -1 , em consequência da menor variação da umidade ao longo do experimento. A relevância da cobertura morta ficou evidenciada para o tratamento com intervalo de irrigação de 48 h, tendendo a controlar as perdas de umidade e manter a produtividade do repolho.Palavras-chave: semiárido, manejo da irrigação, agricultura familiar, Brassica oleraceae Cabbage yield using mulching and different irrigation intervals with moderately saline water ABSTRACT The irrigation management in areas under water scarcity is imperative to increase the water use efficiency particularly in areas with salinization risk and high atmospheric demands. In this study, effect of mulching and irrigation intervals was evaluated using moderately saline water on cabbage yield and on its related variables in an alluvial valley in the semiarid. The experimental design was in random blocks using a 3 x 2 factorial scheme, with 4 replications, adopting irrigation application intervals of 12, 24 and 48 h, and a leaching fraction of 20%, and considering mulching presence or absence on the soil. It was verified that productivities have been affected by the irrigation interval and by mulching. The maximum water use efficiency was obtained with irrigation frequency of 12 h and mulching adoption, corresponding to 110.49 Mg ha -1 mm -1 , associated to a lower soil moisture variation along the experiment. Mulching relevance was highlighted for the irrigation interval equal to 48 h, contributing to control moisture losses, and to keep cabbage yield.

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“…Mean total rainfall is 750 mm, ranging between 500 and 2,000 mm, depending on the locality. There is a distinct rainy season from January to July, but because of the irregular distribution, high evaporation rates, and wide interannual variability, the crop water demands are not met (MARENGO;BERNASCONI, 2015;MONTENEGRO et al, 2010;SILVA et al, 2011). However, these regions have several underground water reserves which could be exploited.…”

Section: Introductionmentioning

confidence: 99%

Production of lettuce with brackish water in NFT hydroponic system

Silva

Paz

Soares

et al. 2018

SCA

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Groundwater reserves in the semi-arid regions, which are mostly brackish, could be used to meet local water demands. Hydroponic cultivation is an alternative of rational use of water. Thus, the objective of this work was to evaluate the technical feasibility of using brackish groundwater in the semi-arid region of Bahia and Recôncavo of Bahia for hydroponic production of curly lettuce cv. 'Verônica' and purple lettuce cv. 'Quatro Estações'. The experiment was conducted in a greenhouse in the city of Cruz das Almas, Bahia State, in a randomized block experimental design, composed of seven treatments [T1-public-supply water; T2-water from the well of UFRB; T3-reject water from the well of Cruz das Almas; T4-water from the well of Sapeaçu; T5-reject water from the well of Sapeaçu; T6-reject water from the well of Conceição do Coité and T7-artificially salinated water (NaCl)] and six replicates in an experimental hydroponic structure using the nutrient film technique (NFT). The following variables were analyzed: number of leaves, shoot fresh matter, shoot length, root length, shoot dry matter, and root dry matter. Relative shoot dry matter production in curly lettuce increased by 1, 5, and 2% in the treatments T2, T3, and T4, respectively, whereas in purple lettuce, the increments were 10, 1, and 20%, respectively, for the same treatments. The use of brackish groundwater from the deep tubular wells of the Federal University of Recôncavo da Bahia and Sapeaçu and desalination reject water from the tubular well of Cruz das Almas proved to be technically feasible for hydroponic lettuce production. Key words: Hydroponics. Lactuca sativa L.. Groundwater. Water salinity. ResumoAs reservas hídricas subterrâneas existentes na região semiárida, na maioria salobras, poderiam ser utilizadas quando disponíveis para atender a demanda hídrica local. O cultivo hidropônico é uma alternativa de exploração racional de água. Com isso, o objetivo do trabalho foi avaliar a viabilidade técnica da utilização de águas subterrâneas salobras do Semiárido e do Recôncavo Baiano na produção hidropônica de alface crespa cv. Verônica e alface lisa repolhuda roxa cv. Quatro Estações. O experimento foi conduzido em casa de vegetação, no Município de Cruz das Almas, Bahia, em delineamento experimental em blocos aleatorizados, composto por sete tratamentos [T1 -água de abastecimento; T2 -água do poço da UFRB; T3 -rejeito do poço do Município de Cruz das Almas; T4 -água do

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Improving agricultural water management in the semi-arid region of Brazil: experimental and modelling study

Cited by 58 publications

References 23 publications

SALTMED Model as an Integrated Management Tool for Water, Crop, Soil and N‐Fertilizer Water Management Strategies and Productivity: Field and Simulation Study

SALTMED Model as an Integrated Management Tool for Water, Crop, Soil and N‐Fertilizer Water Management Strategies and Productivity: Field and Simulation Study

Produtividade do repolho utilizando cobertura morta e diferentes intervalos de irrigação com água moderadamente salina

Production of lettuce with brackish water in NFT hydroponic system

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