IMPACT OF AN ABIOTIC STRESS AS DIFFERENT RATES OF N AND S FERTILIZERS ON NO3-, SO42- AND CL- ACCUMULATION AND DISTRIBUTION IN BUSH BEAN-PLANT (PHASEOLUS VULGARIS L.)

摘要

Greenhouse pot experiment was set up to determine the effect of an abiotic stress as different N and S doses on NO3-, SO42- and Cl- accumulation and distribution in leaves and in pods of bean (Phaseolus vulgaris var. Nanus). Four N rates (0.36, 0.66, 0.96, 1.27 g pot(-1)) in combination with three levels of S rates (0.043, 0.085, 0.170 g pot(-1)) were applied as treatments in a randomized complete block design in four replications. P and K doses were identical in all pots (0.29 g pot(-1) P2O5 and 0.79 g pot(-1) K2O). Nitrogen, phosphorus, potassium and sulphur were added in solution made of NH4NO3, NH4H2PO4, KCl and K2SO4, respectively. Four plants were grown in Mitscherlich pots containing 10 kg soil.With increasing rates of applied N decreased the Cl- concentration both in leaves and in pods. On the contrary, highest N dosages resulted in the accumulation of both NO3- and SO42- ions in bean-plant. Higher S doses significantly reduced the Cl- and NO3- concentration of plant. The decrease of Cl- content in the leaves was larger extent than in podes. There was a significant increase in SO42- concentration both in leaves and pods with the application of growing S rates.According to our results different rates of N and S fertilizers have influenced the quality of the bean and the distribution and accumulation of anions inside of bean-plant.