Study of phonology proceeding of two species Bromus tomentellus and Festuca ovina on Alamot station of Ghazvin province

Phenology studying in the rangelands is important for adjustment of grazing programs, optimal and proper utilization from rangelands plants and prevent from early and untimely grazing and recognition of palatability and nutritional value of plant species in different stages. So in order to determine the timing of entry and exit of livestock to and from rangeland this study was carried out in a semi-steppe rangeland in Alamut of Ghazvin province, 100 km North eastern of Ghazvin five years from 2006 to 2010. The two studied wheat species was Bromus tomentellus and Festuca ovina that has moderate palatability for livestock. From each species 10 basic selected. So information of phenology plant noted in 2 stages: growth stage in every 15days and reproductive stage in every 7 days. The time of the start and end of the species growth varied in the different years in this species affected by rainfall and temperature, and length of period in the rainy years is longer than drought periods. Generally their flowering time is the last week of Ordibehesht (April) to the first week of (May) and it lasts for 3 to 6 weeks depending upon the dryness status or wetness position of the year. In the last week of May, we do the seeding phase.