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Abstract
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Smirnovia iranica, a native valuable woody species from Fabaceae, is an adaptable plant of central sandy areas of Iran. On other hand, this species could be markedly considered from different view points of forage production, soil conservation and medicinal applications. The current research was carried out in Band-e-Rig of Kashan, Iran to evaluate Smirnovia iranica properties including crude protein (c.p), NDF, ADF, P, K, ME and DMD in different phonological stages in order to find its forage quality for livestock nutrition. The result of chemicals analysis indicates that there is a significant difference among different phonological stages of S.iranica in terms of its properties. As the plant age is increased, c.p, ME and DMD are decreased while NDF and ADF are increased. This leads to reduction of S.iranica forage quality, since there is not significant difference between flowering and growth stages in view point of their c.p, ME, DMD, NDF and ADF, also according to increase of P and K in flowering stage, it seems that this stage could be considered as favorable time for S.iranica utilization by livestock.
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