Effects of fall nitrogen rates on rainfed bread wheat yield and yield components in drought condition
Journal Title: International Research Journal of Applied and Basic Sciences - Year 2012, Vol 3, Issue 11
Abstract
In this study fall nitrogen application effects on agronomic characteristics of dryland bread wheat genotypes was investigated. This project was conducted in a split-plot arrangement based on randomized complete block with four replications and ten nitrogen rates (0, 15, 20, 30, 40, 45, 60, 80, 90 and 120 kg N.ha-1 from urea) in main plot and five rainfed bread wheat genotypes in sub-plot in Maragheh Dryland Agricultural Research Institute (DARI) station in 2007-2008. Results showed that application of nitrogen increased biological yield, grain yield, harvest index, degree of productivity, number of spike in m2 and plant height significantly at P<0.01 and increased TKW, number of fertile tiller and flag leaf dry weight significantly at P<0.05. Nitrogen application increased grain yield 47%, biological yield 85%, number of spike in m2 83%, number of fertile tiller 30%, plant height 20% and flag leaf dry weight 17%. Average nitrogen requirement of rainfed wheat for obtaining of 90% maximum grain yield for genotype Azar2, Sardari, Sardari39, Sardari101 and Rasad calculated 42, 46, 45, 38 and 35 kgN.ha-1 from urea in drought year with 137 mm annual precipitation. It can be concluded that application of nitrogen can verify rainfed wheat genotypes agronomic characteristics and grain yield.
Authors and Affiliations
J. Abdollahi Gharekand*| MS Student in University of Mohaghegh Ardabili, Soil Science Department, Ardabil, Iran.abdollahij@yahoo.com, K. Hashemi- majd| Soil Science Department, Faculty of Agriculture, University of Mohaghegh Ardabili., S. B Mosavi| Soil Science Department, Faculty of Agriculture, University of Maragheh, Maragheh, Iran., V. Feiziasl| Soil Science Department, Faculty of Agriculture, University of Maragheh, Maragheh, Iran., J. Jafarzadeh| Dryland Agriculture Research Institute (DARI), Maragheh, Iran., E. karimi| Dryland Agriculture Research Institute (DARI), Maragheh, Iran.
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