نوع مقاله : پژوهشی
نویسندگان
1 عضو هیئت علمی مرکز تحقیقات کشاورزی و منابع طبیعی استان یزد
2 استاد دانشکده منابع طبیعی دانشگاه تهران
3 دانش آموخته کارشناس ارشد مرتعداری، دانشگاه تربیت مدرس
4 کارشناس مرکز تحقیقات کشاورزی و منابع طبیعی یزد
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
In arid and semi-arid rangeland ecosystems, rainfall and temperature variables play a major role in the availability of water within soil profiles and strongly influencing plant productivity and composition in plant communities. In this research, the reactions of the dominant plant species yield to meteorological variables were studied at steppic range in Garize region of Yazd province for nine years. For this purpose, seven dominant Species were selected and their production was monitored every year with double sampling method along four permanent line transect in 60 plots (2m2). Meteorological data were collected from nearby climatological station. Relationships between Main meteorological gradients and annual yield analyzed by redundancy analysis (RDA). According to this result, total annual yield and annual yield of Artemisia sieberi, Aellenia subaphylla and Salsola arbuscula influenced by rainfall in December-March period. Yield of Salsola regida, Salsola tomentosa and Noaea mucronata are influenced not only by rainfall in December-January but also by variability of May high temperature. Species yield of Lactuca orientalis influenced by rainfall and high temperature in April.
کلیدواژهها [English]