Effect of salinity stress induced by NaCl on nutrient elements concentration in wheat leaves

Subject Areas : Agroecology Journal

Monireh Hajiaghaei Kamrani ¹ (Lecturer of Agriculture and Engineering Department Payame Noor University Tehran, Iran)
Azam Rahimi Chegeni ² (Young Researchers and Elite Club Islamic Azad University Khorramabad, Iran Khorramabad Branch)
Hadi Hosseinniya ³ (Young Researchers and Elite Club Islamic Azad University Ghaemshahr Branch Ghaemshahr, Iran)
Ali Babaei Ghaghelestani ⁴ (Master in Weed Sciences Mohagheghe ardabili University Ardabil, Iran)

Received: 2015-04-23 Accepted : 2015-08-21 Published : 2015-08-23

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Abstract :

To soil and water salinity are the main problems for agricultural crop production especially in arid and semi-arid regions. This study was conducted in a completely randomized design and factorial experiment with four replications to investigate the effects of different levels of salinity on nutrient element concentrations in wheat. Treatments consisted of four levels of NaCl salinity, 0, 20, 40, 60 milimolar in perlite bed and second treatment were including Urea, solid NPK and dissolved NPK. Results showed that the effect of different levels of salinity on chlorophyll content and leaf nitrogen percent were significant. Salinity to a certain extent caused the increase of chlorophyll, but then led to the decrease of chlorophyll due to the adverse effect of salinity on chlorophyll and degradation of chloroplasts. Also, the salinity led to the reduction of leaf nitrogen. Reduction of nitrogen content in shoots in salty environments can be due to the inhibitory effect of chloride on nitrate uptake. The highest and lowest concentrations of P respectively were achieved from 0 salinity level with urea and 60 mM salinity level with urea that probably was due to high levels of Na and competition of Cl with P to uptake by the plant. The main effect of salinity is increasing of sodium concentration in plant tissue. Reduced uptake of potassium and reduction of plant growth are the results of sodium increment. Maximum concentration of Ca was reported from 40 mM salinity treatments with urea and minimum amount from 60 mM salinity treatments with solid NPK fertilizer.According to result, in terms of salinity stress, using of dissolved NPK fertilizers in perlit bed had a better performance in the concentration of nutrient elements in wheat leaves.