Effect of Different Levels of Irrigation Water and Vermicompost on Yield and Water Productivity of Quinoa Crop in Dehgolan Plain

Abstract

To investigate the effect of different levels of vermicompost and irrigation on the yield and irrigation water efficiency of Quinoa, this experiment was conducted as a split plot based on a randomized complete block design in the research field of the University of Kurdistan located in Dehgolan in 2021. The experimental factors included four levels of irrigation water 50, 75, 100, and 125% of the water requirement of the quinoa crop and the variable included four levels of vermicompost fertilizer to 0, 5, 10, and 15 tons/ha, respectively. The irrigation method used in this experiment was a drip-strip irrigation system. The amount of irrigation water was measured by a volumetric meter installed on the main pipe. The highest yield of quinoa seed equaled 2375 kg/ha was observed in the treatment of 125% of the water requirement and 15 tons/ha of vermicompost and a biological yield of 5560 kg/ha in the treatment of 100% of the water requirement and 15 tons/ha vermicompost. The highest values of water consumption efficiency and water use efficiency were observed in the treatment of 50% water requirement. The application of 15 tons/ha vermicompost caused a significant increase in water use efficiency compared to the control treatment. The highest quinoa harvest index was observed in the treatment of 125% of the crop water requirement.

Keywords

• drip irrigation
• water use efficiency
• organic fertilizer
• harvest index