Rangeland Management and Ecological Adaptation Analysis Model for Astragalus curvirostris Boiss

The present study investigates the ecological requirements of Astragalus curvirostris Boiss, with emphasis on determining factors that affect distribution plant species, and species’ response to changes in using a Generalized Additive Model (GAM) Iranian Province Zanjan from 2017 2019. Randomized-systematic sampling was used collect vegetation data. Data analysis performed SPSS17 CANOC4.5 software. results showed growth development A. change according environmental linked composition soil variety other species present. This model is indicative competitive limitation along gradient. By understanding all parameters, necessary steps could be taken towards planning proper management programs, including rangeland grazing moment for seed collection, which will result conservation, improvement, restoration rangelands.