نوع مقاله : مقاله پژوهشی
نویسندگان
بخش مهندسی آب، دانشکده کشاورزی، دانشگاه شیراز، شیراز، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
In order to evaluate the economic feasibility of growing grain maize under conditions of deficit irrigation and irrigation water salinity, a research study was conducted at the research farm ofin Shiraz University. To conduct the research, a factorial experiment was conducted in a randomized complete block design with three replications. Four levels of irrigation water salinity were applied, including control (0.6), 2, 3.5, and 5 dS.m-1,.Irrigation water treatment was applied at three water levels: FI, 0.75FI, and 0.5FI. The results showed that the maximum leaf area index (5.82) and seed yield (9.53 Mg.ha-1) were obtained in the full irrigation treatment with irrigation water salinity of 0.6 dS.m-1. Based on the results of economic analysis, the highest benefit-cost ratio of maize was 2.64 in full irrigation and irrigation water salinity of 0.6 dS.m-1. Based on the results of economic analysis, in the full irrigation treatment and 75% full irrigation at irrigation water salinity levels of 0.6 and 2 dS.m-1, the benefit-cost ratio was greater than one and the economic water productivity was also a positive number. Thus, the economic efficiency of water in full irrigation at irrigation water salinity levels of 0.6 and 2 dS.m-1 was 0.064 and 0.012 USD.m-3, respectively, and in 75% full irrigation it was 0.044 and 0.012 USD.m-3, respectively. Therefore, these treatments are economically justified. While in the 50% full irrigation treatment, at all levels of irrigation water salinity, the benefit-cost ratio was less than one and the economic water productivity was a negative number.
کلیدواژهها [English]
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