اثر متقابل پتاسيم و بر برعملكرد تربچه تحت تنش شوري

چكيده انگليسي :

Interaction of Potassium and Boron on Radish Raphanus Sativus L Performance Under Salinity Stress Maryam Joodaki joodakimaryam@yahoo com 20 September 2011 Department of Soil Science Collage of Agriculture Isfahan University of Technology Isfahan 84156 83111 IranDegree M Sc Language FarsiSupervisors H Shariatmadari shariat@ cc iut ac ir and M Shirvani shirvani@cc iut ac irAbstractSoil salinity is a major problem inhibiting crop production in arid and semi arid agricultural lands of Iran Therefore research on sustainable increase of plant production by physiologically increasing the plantresistance to salts and decreasing the salt accumulation in plants is essential in these saline soils In this workthe effects of potassium and boron nutrition on radish under different salinity levels were investigated Radishcommonly consumed as a fresh vegetable and also as a pharmaceutical plant It contains ascorbic acid calcium potassium copper folic acid and antioxidants The main objectives of this study were to investigatethe effects of K and B interactions on dry matter yield cell membrane permeability carbohydrate content andsome micronutrient uptake of radish under salinity condition The experiments were setup in a three factor completely randomized design with three replicates The treatments were potassium as 1 4 and 8 mM boronas 0 1 0 2 and 0 3 mg L and salinity levels as 1 4 and 8 dS m The results showed that micronutrientconcentration and uptake and membrane permeability in root were higher than shoot but K and Naconcentration and uptake and carbohydrate concentration were higher in shoot The maximum fresh and drymatter yield in root and shoot Mn concentration and uptake and carbohydrate concentration in root and theminimum membrane permeability in root and shoot were observed in 8 mM potassium treatment Also themaximum B Fe Zn Cu and Mn concentration and uptake in shoot and maximum Na uptake of root wereobserved in 4 mM potassium level The maximum K B and carbohydrate concentration and also themaximum K Na B Fe and Mn uptake and minimum membrane permeability in root were observed at 0 3mg L of B The maximum K Na B Fe and Mn concentration and minimum membrane permeability andmaximum K B Fe Zn and Mn uptake of root were obtained at 0 3 mg L of B The Fe Mn Zn and Cumaximum yield Zn concentration in shoot Mn concentration in root and shoot and maximum B uptake inroot Zn uptake in shoot and Mn uptake in root and shoot were observed at 8 mM of potassium and 0 3 mg Lof B treatments In salinity level of 8 dS m the maximum K and Mn concentration in shoot carbohydrateconcentration in root and maximum K B and Mn uptake in shoot and B and Fe in root were observed at 4mM of K and 0 3 mg L of B According to the results it could be concluded that the effects of K and B onthe biomass the nutrients concentration and uptake in root and shoot depend on the salinity K and Bconcentration in nutrient solution and nutrient distribution between the root and shoot of the plants Key words Boron Potassium Radish Salinity

جودكي، مريم

اثر متقابل پتاسيم و بر برعملكرد تربچه تحت تنش شوري