Document Type : Research Paper

Authors

• davod Akbari Nodehi
• Aliakbar Azizizohan
• Reza Rezaee

Assistant professor, Dept. of Water Science and Engineering, Qaemshahr Branch, Islamic Azad University, Qaemshahr, Iran

Abstract

In order to study the effects of deficit irrigation on tomato yield and to determine the production function and water use efficiency, an experiment was conducted based on randomized complete block design in three replications for two years, in Mazandaran province. Irrigation treatments were based on 0, 20, 40, 60, 80 and 100% of water requirements. The minimum and maximum yield belonged to I₀ and I₁₀₀ treatments. Water use efficiency and irrigation water use efficiency in I₁₀₀ treatment was significantly higher than the other treatments. The results showed that the maximum yield of tomato occurred when full water requirement was provided. Therefore, I₁₀₀ treatment with 5635 m³.ha^-1 of water consumption and tomato yield of 45,020 kg.ha^-1 was the best treatment and can be recommended to farmers where water resources are not limited. Water use efficiency (WUE) and irrigation water use efficiency (I_WUE) were in the range of 5-9.25 and 9.2-14.6 kg m^-3, respectively. The two-year average of yield response factor (K_y) for tomato was 1.18.

Keywords

• Deficit irrigation
• Water use efficiency
• Tomatoes
• Yield response factor