TY - JOUR T1 - Effect of Phosphorus and Water Stress on Growth, some Water Relations and Plant Nutrient Concentration of Pistachio Seedlings in Greenhouse Conditions TT - تأثیر فسفر و تنش آبی بر رشد، برخی روابط آبی و غلظت عناصر نهال‎های پسته در شرایط گلخانه JF - JSTNAR JO - JSTNAR VL - 18 IS - 67 UR - http://jstnar.iut.ac.ir/article-1-1264-en.html Y1 - 2014 SP - 339 EP - 354 KW - Water stress KW - Phosphorus KW - Growth KW - Photosynthesis KW - Pistachio. N2 - To study the effects of soil phosphorus (P) application on growth and water relations and nutrient concentration of pistachio seedlings (Badami-e-Zarand) under water stress, a greenhouse experiment was conducted. Treatments were arranged in a factorial manner as a completely randomized design with three replications. Treatments consisted of six P levels (0, 30, 60, 90, 120 and 150 mg P Kg-1 soil as H3PO4) and three irrigation intervals (2, 4 and 8 days). Results showed that as water stress increased, growth parameters significantly decreased. As irrigation interval was increased to 8 days, shoot and root dry weights, shoot/root ratio, leaf area and leaf number and stem height decreased. Photosynthesis parameters were significantly decreased by increasing water stress. Also, P and Zn concentrations decreased as irrigation interval increased. Analysis of variance indicated that P application had no significant effect on growth parameters, transpiration rate and photosynthesis. It seems that Olsen extractable P (5.35 mg kg-1 soil) was sufficient for optimum growth of pistachio seedlings and thus, no growth responses were observed from P application in this experiment. Application of phosphorus significantly increased P and decreased Zn concentrations. M3 ER -