yield evaluation and water use efficiency in peanut (arachis hypogaea l.) under different levels of irrigation and nitrogen fertilizer

abstract in order to investigate the effect of irrigation and nitrogen fertilizer, on yield peanut plant, with furrow method of irrigation and water use efficiency (wue) in management to create a proper and better production, split plot experiment was over taken as in complete randomize blocks with three replications and main plot with 6, 12 and 18 day interval irrigation and no irrigation and subplot of nitrogen fertilizer with amount 0, 30, 60 and 90 (kgn/ha) in the year 2009 in astaneh ashrafiyeh in guilan province. the results of this investigation showed that in irrigation management, the maximum yield for the seed are in 6 day interval irrigation with total water use 328 mm has the highest pod yield 4093 and seed yield 2345 (kg/ha) among the amounts of nitrogen also, the fertilizer amount of 60 (kgn/ha) with pot yield of 3376 (kg/ha) and the seed yield of 1796 (kg/ha) were the highest. the wue for peanut as for pod and seed yield under irrigation, with 6 day interval irrigation for seed, pod and biomass have 0.71, 1.24 and 2.88 (kg/m3) of other irrigation management more, the amount of nitrogen 60 (kgn/ha), for seed, pod and biomass have 0.62, 1.21 and 2.58 (kg/m3) of other management higher than. also the 6 day irrigation and without irrigation, the amount of 96 and 76 percent, have the highest and the least amount of rwc. also the management irrigation and nitrogen fertilizer was effect on total biomass, weight of 100 seeds and harvest index.