Study the time of inter and exit of animal in key ranges of 5 bioclimatic zones of Iran Iran _ semi steppe rangelands of Bardsir in kerman province

Each of rangeland species that are grazed by livestock, are ready to graze by their life stage and must have been stopped their grazing in special time. In addition, pasture's soil will be ready to livestock ct entrance based on air temperature and soil moisture content due to precipitations especially in late winter and early spring. Without known this information about each Range land, it is not possible to determined grazing season and grazing management. In addition, depending on soil moisture from my heavenly, especially in late winter and early spring precipitation and air temperature entering the livestock to the pastures will be ready. The experiments period of 5 years between 2006 and 2011 was conducted the range species grazed by livestock; in Bardsir steppe zone was located in Kerman province. However, due to start mid-summer of 2006 the year the information was deleted from the report. The preparation of pasture for livestock grazing, data collection for stage of phonological plant and soil pasture is necessary. For this purpose, a list of important plants in the pasture site was prepared and then 10 species selected stages of phonological plant and height shrub data for each plant once every 15 days were measured in a special form. The apparent soil moisture conditions for each operation and were recorded on special forms. These data were used to determine the appropriate time for removal and Percent of the main pasture species used by livestock from the pasture. Livestock out of the project results to determine how the operation should be allowed to withdraw 50% on multi-year exploitation of the species and to note that more feed livestock in the late-season annual species are the focus remains to be determined. So the animal can enter the Persian date Ordibehesht 20 months, and Persian date Mordad 30 to Persian date Shahrivar 15 out of the pasture.