Determining the physical and economic efficiency of water and nitrogen in sesame production

Document Type : Original Article

Authors

1 Assistant Professor of Seed and Plant Improvement Institute(SPII), Agricultural Research, Education and Extension Organization(AREEO),Karaj, Iran

2 Assistant Professor in Agricultural Economic Researches, Seed and Plant Improvement Institute, Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran.

3 Assistant Professor of Soil and Water Research Institute, Agricultural Research, Education and Extension Organization (AREEO ), Karaj, Iran

Abstract

The current study was conducted to investigate the yield, yield gross income and water and nitrogen efficiency of sesame cultivars grown under full and deficit irrigation conditions. The experiment was carried out at Seed and Plant Iprovement Research Institute, Karaj, Iran in 2017 and 2018. A randomized complete block design arranged in split-factorial plots with three replications was used to run the experiment. Irrigation treatments at two levels including deficit irrigation and full irrigation were assigned to the main plots and a combination of nitrogen fertilizer (0, 60 and 120 kg N ha-1) and sesame cultivars were allocated to sub-plots. To measure the efficiency of the inputs, the yield gross income and physical and economic efficiency indicators were used. According to the results, the average gross income of sesame production in the experimental years was 63.3 million Rials per hectare and under full and deficit irrigation regimes the average gross income values were 94.1 and 33 million Rials per hectare, respectively. The average water physical efficiency under full and deficit irrigation treatment was 0.27 and 0.18 kg of product per cubic meter of water, respectively, and the average nitrogen fertilizer physical efficiency under full and deficit irrigation treatment was 18.8 and 6.56 kg per kg of fertilizer. In addition, the average water economic efficiency under full and deficit irrigation treatment was 21336 and 14224 Rials per cubic meter of water, respectively. The results showed that with a 50% reduction in water consumption, the gross income of sesame production decreases to one-third. In contrast, choosing the right cultivar due to the availability of water increased sesame production by 66%. According to the results, it is suggested to select cultivars that have high yield and economic efficiency.

Keywords

References

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Iranian Journal of Irrigation & Drainage
Volume 16, Issue 4 - Serial Number 94
September and October 2022
Pages 841-851

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