عنوان مقاله [English]
Salinity, especially in arid and semi-arid regions, is one of the major agricultural issues around the world. Vermicompost has high levels of potassium, phosphorus and sodium, which leads to increased salinity. High salinity is a limiting factor in the consumption of this substance. Calcium ions have significant effects on plant physiological processes and improves the morphological and biochemical parameters of plants subjected to salinity stress (NaCl). To investigate the effect of calcium on the improvement of damage caused by vermicompost salinity as the experiment was conducted as a completely randomized design in autumn 2014 in a research greenhouse of Faculty of Agriculture, Ferdowsi University of Mashhad. In this experiment, calcium nitrate (99%) was used as a calcium source. The treatments consisted of calcium vermicompost control, 10mM calcium treated before seeding, 25mM calcium treatment and 75mM calcium treatment with culture medium. The results of this experiment showed that calcium presence had a significant effect on salinity effects and 10mM calcium had the most positive effects on the growth characteristics of cucumber in vermicompost culture medium. The proper application of calcium ion reduces the sensitivity of plants to salinity and improves the desired parameters, therefore, the use of crops with high calcium application efficiency can help reduce economic costs against salinity.