Abstract
A study was conducted in an environmentally controlled greenhouse to evaluate two green bean cultivars, ‘Bronco’ and ‘Paulista’, under three application volumes of irrigation water based on replacing 100, 80, and 60% of evapotranspiration (ET). The experiment was in a split-plot design with three replications, recording vegetative growth, yield, pod parameters, water use efficiency (WUE), and chemical content of pods. The results showed that there were no differences between 80% ET and 100% ET for most parameters. In addition, 80% of ET increased the pod yield and improved the pod parameters and chemical composition. Therefore, this irrigation treatment can increase green bean productivity and improve pod quality. Reducing water application from 100 to 60% of ET progressively increased WUE. The ‘Bronco’ cultivar had a higher plant height, pod yield, WUE, pod weight, pod diameter, and total fiber amount than ‘Paulista’, while the ‘Paulista’ cultivar was superior in total chlorophyll, number of pods per plant, pod length, P, Ca, Mg, Fe, Cu, protein, vitamin C, titratable acid, and soluble sugar.
Highlights
Agriculture is the largest water consumer worldwide, using 70% of the total renewable fresh water resources, as reported by WWAP [1]
Climate change has forced scientists and decision makers to think about the future of water resources [4] and their sustainability in a scarcity situation, taking into account less water coming from Ethiopia to Egypt and a high rate of population growth [2]
Badr et al [7] and Saleh et al [8] recommend the use of modern irrigation systems such as drip or subsurface drip irrigation, instead of traditional surface irrigation
Summary
Agriculture is the largest water consumer worldwide, using 70% of the total renewable fresh water resources, as reported by WWAP [1]. Water resources are a scarce and limiting factor for expanding cultivation and plant production in many arid and semi-arid areas, including Egypt, as reported by Quda [2]. Climate change has forced scientists and decision makers to think about the future of water resources [4] and their sustainability in a scarcity situation, taking into account less water coming from Ethiopia to Egypt and a high rate of population growth [2]. Efficient water delivery systems can contribute towards increased crop yield and improving crop water and fertilizer use efficiency [7]. Improving water use efficiency (WUE) without any reduction in productivity to satisfy present and future requirements of a high population growth
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