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To be informed of the forage quality indices is one of the fundamental essentials for determination of the amount of forage sufficient for the daily requirements of animal in rangelands and wildlife habitats. This amount would be different depending on the vegetative composition and consequently the forage quality (Arzani, 2009). In this regard, grasses are considered one of the most important plants in the vegetative composition of rangelands in the country’s different climate zones that are grazed by the animals and meet a considerable amount of animal requirements (Arzani et al. 2010). Therefore, the values of forage quality indices (crude protein, acid detergent fiber, digestibility of dry matter, metabolisable energy) of 135 grass species were measured at different growth stages (vegetative growth, flowering, and seeding stage) and from different areas of the country.

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Forage Quality Indices of Some Important Grass Species of Iranian Rangelands

To be informed of the forage quality indices is one of the fundamental essentials for determination of the amount of forage sufficient for the daily requirements of animal in rangelands and wildlife habitats. This amount would be different depending on the vegetative composition and consequently the forage quality (Arzani, 2009). In this regard, grasses are considered one of the most important plants in the vegetative composition of rangelands in the country’s different climate zones that are grazed by the animals and meet a considerable amount of animal requirements (Arzani et al. 2010). Therefore, the values of forage quality indices (crude protein, acid detergent fiber, digestibility of dry matter, metabolisable energy) of 135 grass species were measured at different growth stages (vegetative growth, flowering, and seeding stage) and from different areas of the country.