Effect of different intervals of tape drip irrigation on wheat yield and water use efficiency

Irrigation is known as one of the most important factors in the production of grains in dry climate. The present irrigation method used for wheat and alfalfa production is mainly surface irrigation (Basin, Border, and furrow) and this method consumes more water and has less water efficiency than innovative irrigation methods. Using pressurized irrigation systems can both save water and increase water use efficiency. The purpose of this study is to investigate the feasibility of using strip drip irrigation in winter wheat. In order to determine the most suitable distance between irrigation tapes and find out the effect of Alternate Partial Root Drying (APRD) on water use efficiency, yield and components of wheat yield , a factorial experiment with 6 treatments and three replications was conducted in Pelband plain-Khorasan Razavi province- in 2016-2017. Then, water consumed, yield and its component yield were compared in traditional flooding method - conventional flooding. The treatments applied in this research consisted of drip-tape irrigation with distance of 50 cm (I1) and 60 cm (I2) and 70 cm (I3) and three intermittent drip-tape irrigation with spacing of 50 cm (I4) and 60 cm (I5) And 70 cm (I6) and all of them with three repetitions. The results of mean square variance analysis showed significant difference in tape irrigation distance and wheat component on, yield and water use efficiency was significant at 1% level, and irrigation interval on number of pancakes, number of seeds in the cluster, stem height, Yield and water use efficiency were significant at 1% level and significant differences were observed on 1000 grain weight at 5% level. And the interaction effects on 1000 grain weight and grain number per cluster was not significant, but there was a significant difference between the number of pancakes and the level of 1%. Also, stem height and yield and water use efficiency at 5% level were statistically significant Had The highest yield and water use efficiency related to the irrigation bar spacing 50 and fixed irrigation type were 4958 kg / ha and 1. 57 kg / m3, respectively, and the least irrigation bar spacing were 50 with alternating irrigation it is equal to 3005 kg / ha and 95 / kg / m3 respectively. The performance and efficiency of water use in irrigation were measured at 5030 kg / ha and 1.05 kg / m3 respectively. The results of this study showed that irrigation intervals of 50, 60 and 70 cm with irrigation method were recommended for wheat cultivation in the study area. the irrigation bar spacing 50 with fixed type is more better than furrow irrigation in drought years, because of saving water around 1620 cubic meters and less than 500 kilograms decrease performance .