Effect of different irrigation levels in sprinkler irrigation on yield and water use efficiency of cotton (Gossipium hirsutum L.)

Document Type : Research Paper

Authors

1 Assistant Prof., Cotton Research Institute of Iran. Agricultural Research education extension organization, Gorgan, Iran

2 Assistant Prof., Agriculture and Natural Resources Research and Education Center of Khorasan-Razavi, Agricultural Research, Education and Extension Organization, Mashhad, Iran

Abstract

A two years’ field experiments was conducted to determine the cotton water need at Hashemabad cotton research Station. The Hashemabad Cotton Research Station is located in north of Iran at 36° 51' N latitude and 54° 16' E longitude at the south-east corner of Caspian Sea and its height from sea level is 13.3 meters. That station has a Mediterranean climate with relatively mild winters and dry summers. In this project, five Irrigation treatments contains T1= 100%, T2= 75%, T3= 50%, T4= 25%, T5= 0% at three replications on Randomized complete bloke design using sprinkler Irrigation system were studied. By analysis of variance indicated that there was no significant difference between T1, T2 and T3, in terms of seed cotton yield. However, in term of numerically, the yield of T3 had 22 and 16 percent over T1 and T2, respectively. The relative water use efficiency of this treatment was over others. According to this research project, the recommended of cotton Irrigation water is 50 and 80 percent at wet and drought years respectively. The amount of cotton water needed in the humid region is 3200 and 4600 m3/ha at wet and drought years, respectively. Based on the results of this study, it seems necessary that reduce of the amount of cotton irrigation requirement in northern of Iran.

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