Study of soil and plant characteristics interaction in Salsola rigida in desert lands

In this study one site with good coverage of Salsola rigida species selected in desert region of Shahrood area. Four plots of 100 m2 were chosen in this site and two soil profiles were digged in each plot; one profile under Salsola rigida plants and another in the space between this species. Soil samples were collected from three depth of 10-25 cm, 10-25 cm and>25cm. For asessing elements of biomass and their effects on the soil, plant sample were analysed in laboratory. Results indicated that organic matter percentage as well as N, K and HCO3 increased significantly. An increase of Ec, Caco3 and Na are the main detrimental factors for expanding Salsola rigida species.