The study preference value of rangeland species for sheep and goat. (Case study: Saleh Abad site in province Ilam)

In determining grazing capacity, determine forage production, preference value, the allowable use, nutritional value and range condition is required. shows. In order to the value of the preference 17 species and annual plants, with method percent of consumption at four years 2007 to 2010 in Ilam Salh Abad site was studied. The results showed that the effect of year, month and plant species on preference value is significant. Average preference value in 1387 due to drought that more the value of the preference of 86, 88 and 89. Such as Preference value species in April over March and difference is significant. The results showed that the Ankyropetalu gypsophiloides, Annual grass & forbs, Salvia compressa, and Sanguiosorba minor component species are palatability average (Class III). Other species non-palatable (class IV and V). In the study area since the last two months (March and April) matches the first two months of plant growth. Annual grasses and forbs species and Sanguiosorba minor equally in both mention is consumed by animals. Toward the end of the grazing season (end of April) perennial species are consumed. For example, the relative consumption of Salvia compressa and Ankyropetalum gypsophiloides 72 and 92 percent, respectively. Therefore, with presence of livestock in the months April to June, fresh forage perennial herbs by livestock are grazing. But on According to farmer the Forage production of permanent pasture is not enough and livestock outside of rangeland.