تاثير تيمارهاي مختلف آبياري و پتاسيم بر پتانسيل آب و تجمع عناصر نيتروژن ، فسفر و پتاسيم در نهال دو رقم زيتون

Effect of Different Treatments Irrigation and Potassium on Water Potential and N, P and Kccumulation in Two Olive Saplings

Drought is the mOSI imparl ant limiting factor tor plant growth and crop production. In this stud), resistance of 2 olive cuhivars including Mahali Baghrnalek and Zard to the drought wa-, investigated h) using different irrigation treatment (I,: watering when 0-3% of the plants available water was used. I,: watering \1 hen 33-66 % of the plants available water lias used. I,: watering when 66-100 % of the plants available water lias used), three potassium levels ((), 50 and 100 g potassium sulphate tillʹ each plant at planting time in pot ).1 he experiment was carried out in a completely randomized design with factorial arrangements with lour replications. Measured parameters included crop water potential, leaf relative water content and accumulation N, Iʹ and K clements in leaf and root. The rcsuh-. showed that crop water potential in cv. Mahali l3aghmalek was lower than cv. Lard, hut its relative water content was higher. In both cuhivars, water potential and rclat i\ cʹ II ater content II ere reduced with decreasing of irrigation. The best Rwe and water potential lias related to I 1 water treatment As well as N, Iʹ and K clements in leaf were 100Ier in I, treatment. Usc of potassium led to the increase of the relative water content and decrease of the plant water potential. The best RWe and the lowest water potential were related to K, potassium treatment (100 g potassium sulphate). Potassium tcrtili/ation led to increasing potassium of the root and leaves in each cultivar, but did not shm\ significant effect on Nand P in the tealʹand root.