Evaluation barley germination in NaCl+CaCl₂ solution, natural saline water and saline soil.

摘要

Salinity stress negatively impacts agricultural yield throughout the world affecting production whether it is for subsistence or economic gain. Our objection in this study was to investigate the effect of salinity on barley germination. In this study barley (Hordeum vulgare) was carried out in three different experiments in complete randomize design through 13 treatments and 3 replicates. The salinity levels in all experiments were consisted of control (0.005 dS m-1), 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25 and 27 dS m-1. Germination in NaCl+CaCl₂ solution, natural saline water and saline soil were studied. The results indicated that the increased salinity, decreased number of both percentage and rate of germination. These were further reduction in natural saline water than the NaCl+CaCl₂ solution. In higher salinities, the germination rate was decreased, while the required time for germination was increased. The seeds could germinate in all salinity treatments in the NaCl+CaCl₂ solution, but germination was successful until 13 dS m-1 in soil and consequently germinated seed decrease rapidly to the degree that in treatment 23 dS m-1 no seed was germinate. Soil inhabits water absorption by the seeds more than solutions and this is due to the matrix potential of soil beside the osmotic potential.