Comparing sprinkler and drip irrigation systems for full and deficit irrigated maize using multicriteria analysis and simulation modelling: Ranking for water saving vs. farm economic returns

Rodrigues, G. C.; Paredes, Paula; Gonçalves, José M.; Alves, Isabel; Pereira, Luís S.

doi:10.1016/j.agwat.2013.05.005

Cited by 74 publications

(41 citation statements)

References 62 publications

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“…Entretanto, investigações recentes (GEERTS & RAES, 2009;KLOCKE et al, 2010) têm alertado sobre a limitação nos recursos terra e água, razão pela qual, as estratégias de irrigação deficitária têm sido indicadas para regiões secas ou com distribuição irregular de chuvas. As irrigações deficitárias consistem na aplicação de lâminas de irrigação menores que as necessárias para satisfazer plenamente as necessidades hídricas das culturas (RODRIGUES et al, 2013).…”

Section: Introductionunclassified

Desempenho produtivo e retorno econômico da cultura do sorgo submetida à irrigação deficitária

et al. 2015

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RESUMO:A irrigação deficitária é comumente utilizada em regiões de reduzida disponibilidade de água ou de energia para a irrigação e visa incrementar a eficiência de uso da água. Essa técnica pode ser adequada à cultura do sorgo, que apresenta produtividades satisfatórias, mesmo em condições limitadas de disponibilidade de água no solo. Os objetivos do trabalho foram: avaliar os efeitos de diferentes manejos de irrigação deficitária sobre o índice de área foliar, altura de plantas e rendimento de grãos do sorgo, e identificar o nível crítico de irrigação deficitária que proporciona maior produtividade da água irrigada e retorno econômico. O experimento foi desenvolvido no ano agrícola de 2012/2013, sob uma cobertura móvel, que impedia a ocorrência de chuva na área experimental. Foram testados quatro manejos de irrigação deficitária: 100; 75; 50 e 25% de reposição da evapotranspiração da cultura (ET c ). A redução de 25% na reposição da ET c resultou na diminuição de 7% na altura das plantas, 5% no índice de área foliar e 17% no rendimento de grãos. A maior receita líquida da cultura foi alcançada utilizando o manejo de irrigação com reposição de 75% da ET c . A produtividade da água e o retorno econômico da aplicação de água apresentaram uma resposta linear positiva em relação à redução na reposição da ET c . PALAVRAS-CHAVE: evapotranspiração da cultura, produtividade da água irrigada, Sorghum bicolor. PRODUCTIVE PERFORMANCE AND ECONOMIC RETURN OF SORGHUM CROP SUBMITTED TO DEFICIT IRRIGATION ABSTRACT:The deficit irrigation is commonly used in regions of reduced water and energy availability for irrigation with a view to increase water use efficiency. This technology can be a strategy to increase sorghum production under the conditions of limited soil water availability. The objectives of this study were to: (i) evaluate the effects of different deficit irrigation management on leaf area index, plant height and grain yield of sorghum, and (ii) identify the critical level of deficit irrigation for optimum irrigated water productivity and economic return. The experiment was conducted in a Rainout Shelter during the 2012/13 cropping season. The deficit irrigation management consisted of water replacement in the crop root zone by: 100, 75, 50 and 25% of crop evapotranspiration (ET c ). A 25% reduction in the replacement of ET c resulted in about 7% decrease in plant height, 5% in leaf area index and 17% in sorghum grain yield . The highest net revenue of the culture was achieved using ET c replacement of 75%. The water productivity and economic return of water application showed a positive linear response in relation to the reduction in ET c replacement .

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Section: Introductionunclassified

Desempenho produtivo e retorno econômico da cultura do sorgo submetida à irrigação deficitária

et al. 2015

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“…The degree of this depended on the factors such as commodity price, farming size -as economies of scale could be applicable, and technology use, including an irrigation system. Rodrigues et al [3] showed that under a low commodity price scenario (154 € ton-1), EWPR for full and DI irrigation treatments (Table 1) ranged between 0.64 and 0.97, indicating that the economic return, becoming unprofitable even when using a high efficient irrigation system, decreased as shown in Figure 4. In contrast, when considering high commodity prices (264 € ton-1), EWPR greater than that shown in Figure 4, farming maize under DI, could still lead to profit, even if the yield was reduced.…”

Section: Resultsmentioning

confidence: 99%

“…The economics of production used in this report is adopted from [3,16]. The economic water productivity ratio (EWPR), shown in Equation 3, relates to the yield value with the full farming cost of total water used (TWU):…”

Section: Geoscience Engineeringmentioning

confidence: 99%

“…Deficit irrigation (DI) is one of the proposed strategies for optimizing the water used in irrigated corn production. DI means the intentional under-irrigation of crops below full crop water requirements (crop evapotranspiration), while maintaining a positive economic return [3,4]. Normally, deliberately subjecting corn to water stress has an impact on the productivity factors such as yield, water use efficiency (WUE), irrigation WUE, and economic returns [5,6]; the impact is very sensitive to localized environments and management practices.…”

Section: Introductionmentioning

confidence: 99%

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A Review of Growth Stage Deficit Irrigation Effecting Sticky Maize Production

Ha¹

2017

GeoScience Engineering

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The shortage of water resources influences the future sustainability of sticky Maize (Zea mays L.) production. Deficit irrigation (DI) -a water management strategy -has gained much attention from scientists because of enhanced water use efficiency (WUE). Nonetheless, in reality, when applying this technique, its impact on yield and economic returns should be considered. Through an analytical literature review, this study examined the effect of growth stage DI on Maize production factors, i.e. yield, WUE, and economic returns. The results revealed that Maize's WUE could be improved with the lowest reduction in yield as water stress was imposed during the vegetative or maturation growth stages. Therefore, the profitable returns could be reached even if the yield was reduced; however, the economic return was sensitive to commodity prices. The present review addressed that the Maize flexible capacities under growth stage water stress presented an opportunity for the optimization of irrigated water and profit preservation by accurately judging the managing time of irrigation implementation.

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“…Therefore, this may affect productivity, but reduces water and energy consumption. However, the yield reduction has to be minimal in order to maintain the economic return of the irrigated crop (RODRIGUES et al, 2013). The effects of water deficit on maize plants, when applied at various stages of crop development, are widely discussed in the literature (MARTINS et al, 2013, RODRIGUES et al, 2013.…”

Section: Introductionmentioning

confidence: 99%

Simulation of soil water balance and partitioning of evapotranspiration of maize grown in two growing seasons in Southern Brazil

et al. 2017

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The objective of this study was to simulate the variation of the available soil water during maize crop growth, in two different sowing times (first and second growing season), using a drip irrigation system. The treatments consisted of different irrigation strategies (full to deficit). The SIMDualKc simulation model was used to determine the daily soil water balance and crop evapotranspiration using the dual crop coefficient approach. Soil, climate, crop and irrigation parameters were used as input data. Two experiments were carried out in a rainout shelter composed of two metallic structures (16x10m) in the city of Santa Maria, Rio Grande do Sul, Brazil, during 2010/11 (second crop, season 1) and 2011/12 (first crop, season 2) growing seasons, under no-tillage system. The simulations showed that all the irrigation management strategies used in season 2 resulted in soil water deficit, while only two strategies showed deficit in season 1. Results showed good agreement between observed and simulated soil water data, with an R2 ranging from 0.86 to 0.99 and the root mean square error ranging from 2.7 to 5.6% of the total available water for seasons 1 and 2, respectively. The observed results of water balance showed that maize grown in season 2 presented higher water consumption compared to season 1, due to the higher atmospheric demand of season 2. The SIMDualKc model allowed the partitioning of crop evapotranspiration into soil evaporation and crop transpiration, demonstrating that the vegetative growth subperiod presented the greatest differences between the two seasons compared to the others growth phases.

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Comparing sprinkler and drip irrigation systems for full and deficit irrigated maize using multicriteria analysis and simulation modelling: Ranking for water saving vs. farm economic returns

Cited by 74 publications

References 62 publications

Desempenho produtivo e retorno econômico da cultura do sorgo submetida à irrigação deficitária

Desempenho produtivo e retorno econômico da cultura do sorgo submetida à irrigação deficitária

A Review of Growth Stage Deficit Irrigation Effecting Sticky Maize Production

Simulation of soil water balance and partitioning of evapotranspiration of maize grown in two growing seasons in Southern Brazil

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