A vast area in central Iran is desert in which the soil salinity is high. Therefore, plant varieties capable of growing in this area are very limited, the most typical ones which can be used by animals, mainly camel, are Alhogi spp. (AL), Salsola soda spp. (SS) and Shooreh (SH). However, the nutritional value of these plants in terms of their chemical compositions and degradability characteristics is not available. The objective of this study was to determine the chemical composition and extent organic matter (OM) digestion of these plants compared with grass nuts (GN) as a reference feed by using an in vitro method (Rezaeian and Chaudhry 2005).