Investigating the monitoring and changes of plant indices in the semi-steppe rangelands of Khalil Beyg Arsanjan, Fars

rangeland monitoring is necessary in the sense of continuous investigation of these lands, considering the ecological importance, economic functions and constant changes of these resources. Based on this, monitoring of Khalil Beyg rangelands in Arsanjan city was done for 2 years (2020 and 2021). The evaluated plant indices included the percentage of canopy cover of plant species, production rate of plant species, percentage of litter, stones and pebbles, bare soil, rangeland condition and trend. The results showed that the percentage of plant canopy cover ranged from 10.98% in 2020 to 15.5% in 2021 and the amount of production varied from 350.208 to 566.306 kg of dry matter per hectare. The range condition of the poor state has been investigated in two years and its trend was negative. Based on the results of the comparisons made using the independent t test, most of the plant canopy cover indices (vegetative forms and different palatable classes) and production indices (vegetative forms and different palatable classes) between the two The year of the survey period (2020 represents a wet year and 2021 represents a dry year) had a significant difference at the level of 1 and 5%. The results of Pearson's correlation test also showed that the amount of fall and winter precipitation, annual precipitation, average minimum temperature and average annual temperature had the highest correlation in the canopy cover and total production of plants in the region.