Analysis of on-farm irrigation performance in Mediterranean greenhouses

Fernández, Manuel Ramírez; González, Alicia María; Carreño, Jorge Armando Fonseca; Perez, Carlos A.; Bonachela, S.

doi:10.1016/j.agwat.2007.02.001

Cited by 78 publications

(59 citation statements)

References 27 publications

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“…In the case of pear tomato, Carreño et al (2000) found values ranging between 21 and 23 kg/m 3 . However, Fernández et al (2007) found a higher CWP value for the watermelon grown in the Campo de Dalías area (35.6 kg/m 3 ). It is important to highlight the significant increase of the CWP for the watermelon in the second study period.…”

Section: Single Crop Productivity Analysismentioning

confidence: 90%

“…This research work tries to fill the gap of irrigation performance and productivity assessment studies in Mediterranean greenhouse districts as there are few previous studies regarding this issue. Perhaps, one of the most comprehensive and specific studies is that conducted by Fernández et al (2007) in a nearby greenhouse area in southern Spain, although it was performed in an area with much less severe water scarcity and salinity problems.…”

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confidence: 99%

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Water Productivity in a Mediterranean Semi-Arid Greenhouse District

Sánchez

Reca

Martínez

2015

Water Resour Manage

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An irrigation performance analysis has been carried out in a horticultural greenhouse area located in the BCampo de Níjar^(Southern Spain) in order to assess its irrigation productivity. Irrigation water productivity indicators were calculated for a wide sample of crops over the course of two different study periods. These productivity indices were similar in average to those reported in other nearby greenhouse irrigation districts although their variability was very high. The overall productivity ratio (CYR) was 73.9 %. The low values for CYR were expected as irrigation water in this area has high salinity levels and low irrigation leaching fractions were applied. The influence of type of crop, greenhouse technology and agricultural season in the CYR values was analyzed. None of these factors had a statistically significant influence. A multivariate regression analysis was performed to model the crop yield as a function of several quantitative variables. The results showed that the most significant variable was the relative irrigation supply (RIS). Other variables that had an influence of the productivity were the length of the growing cycle in the case of tomato and the number of greenhouses per farm in the case of watermelon. Results of this work are useful as they highlight the weaknesses of the system and suggest possible measures in order to improve its productivity and sustainability.

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Section: Single Crop Productivity Analysismentioning

confidence: 90%

mentioning

confidence: 99%

Water Productivity in a Mediterranean Semi-Arid Greenhouse District

Sánchez

Reca

Martínez

2015

Water Resour Manage

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“…Its Mediterranean climate is semi-arid, with mild winters and high solar radiation. Secondly, annual precipitation is very low, with sporadic torrential downpours that result in no permanent streams or barrages to collect and store runoffs [26,27]. Nevertheless, the region has significant aquifers.…”

Section: Case Study: Níjar Districtmentioning

confidence: 99%

Perceptions and Acceptance of Desalinated Seawater for Irrigation: A Case Study in the Níjar District (Southeast Spain)

Aznar-Sánchez

Ureña

Valera

2017

Water

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Abstract:In the context of increasing demand for irrigation water-but, at the same time, with the constraints in the supply from traditional resources-desalinated seawater has been recognized as one of the alternative sources of water to increase the supply for agricultural irrigation. However, its use among farmers has not yet started to expand. Policy makers need to understand what is causing the low acceptance levels of farmers, and how their attitudes could be improved. This is the first study that has conducted an analysis of farmers' perceptions and acceptance of the use of desalinated seawater for irrigation. The study is based on collected data from a survey completed by farmers in southeastern Spain who do not use desalinated seawater. The main results indicate that desalinated seawater as a water supply source has the lowest acceptance level for farmers. Barriers for its use are price, the need for additional fertilization, and the perception that it would negatively affect the yield and crop quality. The farmers' general level of knowledge about the impact of using desalinated seawater in agriculture is extremely low. Furthermore, farmers consider it a priority that their startup investment should be subsidized and that water prices should be reduced. Based on the study findings, this paper makes recommendations for the decision-making process in order to improve farmers' acceptance levels.

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“…El modelo está basado en dos sub-modelos: un sub-modelo que permite simular las demandas de agua de riego de los cultivos de la zona siguiendo las metodologías de cálculo recomendadas para estas condiciones (Fernández, González, Carreño, Pérez, & Bonachela, 2007;Orgaz, Fernández, Bonachela, Gallardo, & Fereres, 2005) y un sub-modelo de simulación de la producción de energía solar fotovoltaica basado en métodos de cálculo propuestos en la literatura (López-Luque, Reca, & Martínez, 2015;Posadillo & López-Luque, 2008a,b). En dicho modelo, se evalúan los costos de inversión de la instalación fotovoltaica y los ingresos derivados de la energía eléctrica producida.…”

Section: Descripción General De La Metodologíaunclassified