The effect of Different nitrogen and irrigation period on quantitative and qualitatitive characteristics in pistachio in Kerman

This study was carried out in the Kerman pistachio research station (P.R.S.). A split-plot design was used with three irrigation interval including 1: 30 days interval irrigation 2: 40 days interval irrigation 3: 60 days interval irrigation, and three levels of nitrogen including 1: without nitrogen fertilizer 2: 750 gram nitrogen fertilizer for one tree 3: 1500 gram nitrogen fertilizer in the sub plot. The results showed that in Kerman the highest yield was obtained 3079, 2809 and 2789 from trees that irrigated in the 40 days intervals with 750 and 1500-gram nitrogen. In addition, the lowest yield was 1743 and 1749 gram per tree from trees that irrigated with 30 and 60 days intervals without nitrogen application (I60N0 and I30N0). Therefore, this treatment was the best treatment yield in this area. In each interval irrigation treatments with N0 level showed the lowest vegetative growth. In the study region, vegetative growth was improved by increasing of nitrogen levels by the most of treatments. the most vegetative growth were taken by application of treatments of I30N750, I40N750 and I60N750 including 9.4, 9.7 and 9.2 cm, respectively and the lowest vegetative growth were found by application of treatments of I30N0, I40N0 and I60N0 including 5.5, 5.6 and 5.7 cm, respectively. Result indicated that, the most nitrogen concentration in leaf showed 2.1 percent (I40N750 treatment) and the lowest nitrogen concentration in leaf was 1.4 percent (I30N0 treatment). Effect of interval irrigation treatments with N level showed the lowest splitting inI30N0 and maximum in I60N1500. I40N750 have biggest nut size.