Investigation of available forage quality for Dalagh breed in Agh Ghala winter range in two phonological stages

To study the quality of available forage for winter rangeland of Agh Ghala located in Golestan province, fifteen plant species in two phenological stage were sampled. From each plant five replication and in each replication five stands were randomly selected and cutted. The samples were dried in lab condition. Then chemical analysis was accomplished to determine indicators of forage quality. These indicators including crude protein, acid detergent fiber, digestible dry matter, metabolisable energy,%N and ADF were measured and by using %N, crud protein and by using ADF and %N, digestible and based on of digestible dry mater, metabolisable energy in each forage kilogram was calculated. Analysis of variance was applied for data. The results indicate that by proceeding in growth stages crude protein decreased while acid detergent fiber increased. The highest amount of forage quality is related to Atriplex lentiformis in vegetative growth. While the lowest one is related to Hordeum lephoides in maturity growth. Also the result showed that there are significant differences in forage quality of various plants (p< 0.05).