ﺑﺮرﺳﻲ اﺛﺮ ﺗﻨﺶ ﺧﺸﻜﻲ و ﺗﺎرﻳﺦ ﻛﺎﺷﺖ ﺑﺮ ﻋﻤﻠﻜﺮد ﮔﻴﺎه اﺳﭙﺮس(.Onobrychis Vicifolia L)

In order to study the effect of irrigation regimes (drought stress) and sowing date on yield of Sainfoin carried out a experiment in the research farm at Campus of Agriculture and Natural Resources, Razi University, during 2011-2012. Factors were including different of irrigation regimes (no irrigation, once irrigation, twice irrigation and three times irrigation) and sowing date (15/11/2011, 11/2/2011, 27/3/2012 and 14/4/2012). Experiment was split plot based on Randomized complete block design (RCBD) in the three replications. Results showed that the effect of irrigation regimes was significant effect on all of studied traits and at all traits for 3 irrigations was the most of value. Also sowing date had significant effect on all of traits (except grain weight) and first and second sowing dates was the most of values.