Effect of deficit irrigation management at growth stages on yield and yield components of Cowpea )Vigna unguiculata L. Walp) in Astaneh Ashrafiyeh region
Subject Areas : Crop Production Research
Baradaran-Hazaveh Baradaran-Hazaveh
1
*
,
Ali Abdzad Gohari
2
1 - . Department of Water Science and Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran.
2 - On-Farm Water Management Department, Soil and Water Research Institute, Agricultural Research Education and Extension Organization (AREEO)
Keywords: Growth stages, Irrigation management, Water use, Yield,
Abstract :
Given the water shortage problem in the country, optimal use of water and soil resources is necessary and essential. Access to sufficient water and its supply during the growth stages is one of the most important needs of the Cowpea plant for growth and crop production. For this purpose, a split-plot experiment was conducted in a randomized complete block design with 3 replications in Astaneh Ashrafiyeh City of Guilan Province in 2022 crop year. The plant's water requirement management as main factor in 4 levels: no-irrigation management (rainfed) and providing 50, 75, and 100 percent of the plant's water requirement, and irrigation time as subfactor in 2 levels: irrigation at pod formation and full maturity growth stages vere considered. The results of the study showed that the highest biomass, pod, and seed yields were observed at the full maturity stage with 100% water requirement of the plant, with an average of 4588, 3222, and 1005 kg/ha, respectively. In conditions of 100% water requirement at full maturity, the highest 100-seed weight and number of pods per plant were an average of 20.1 g and 24, respectively. According to the results, it can be stated that to achieve maximum seed yield in the study area, complete irrigation should be provided until the plant reaches maturity, considering the multiple harvests of this plant, so that the plant does not face a reduction in final yield.