Evaluation of yield and yield components of greenhouse cucumber under different levels and methods of irrigation

Restrictions on water resources in agriculture highlight the need for effective and efficient irrigation methods. On the other hand, deficit irrigation as a limiting factor to affects plant growth. In order to study the effects of regulated deficit irrigation and partial root zone drying on yield and yield components of greenhouse cucumber. an experiment was conducted in Jiroft. The experiment treatments were arranged as randomized complete block design with three replications. The irrigation regimes consisted of full irrigation. regulated deficit and partial root zone drying irrigation (RDI75. RDI55). The results showed that deficit irrigation resulted in water saving at the rates of 15.9-31.4 percent. The highest yield (257.6 ton/ha) was produced by full irrigation. There was no significant difference between yield of full irrigation treatment and 75 percent water replacement in partial root zone drying. The highest water use efficiency was 56.4 kg/m3 was obtained in 75 percent water replacement in partial root zone drying. Also. despite the same water consumption of 75 percent water replacement in partial root zone drying and regulated deficit. yield was decrease 13.4 percent. Therefore. it can be concluded that 75 percent water replacement in partial root zone drying. which resulted in a non-significant decrease of yield and while resulting in a 25 percent decrease in water use and increased 12.9 percent of water use efficiency. which can be considered as a superior treatment and a suitable strategy to cope with the water crisis and increasing irrigation efficiency in greenhouse cucumber cultivation in Jiroft area. to move towards a sustainable agricultural system.