ارزﻳﺎﺑﻲ راﺑﻄﻪ ﻛﻤﻲ ﻋﻤﻜﻠﺮد ﺑﺎ ﺗﺎرﻳﺦ ﻛﺎﺷﺖ و اﻧﺪازه ﺑﻨﻪ زﻋﻔﺮان(Crocus sativus L.) در دﺷﺖ وارﻣﻴﻦ

In order to selection of the best planting date and corm size in improvement of flowering and stigma yield of saffron in Varamin plain, an field experiment was conducted as factorial in a randomized complete block design with three replications at the research farm of college of Abouraihan- University of Tehran, Pakdasht area is located in Varamin plain in 2013. Treatments included planting dates, 10 June (D1), 7 September (D2), 27 September (D3) and 12 October (D4) as a major factor in furrow condition, and two corm size included 10-14 g (S1) and 5-9 g (S2) as a secondary factor, was assessed on quantitative yield of saffron. The results showed that although the flowering in the first planting date in D1 began later than other dates, the yield was better other planting dates. After D1, yield of the major corms in D3 was more than other dates, but this difference was not significant in comparison with D2. With delayed planting date and temperature, flowers blooming started early in D4, D3 and D2 respectively. Flowers blooming started earlier in D4, but comparing the othe planting dates, had a lowest stigma of flowers and the best performance. Yield of flowers and stigma in large cormes were higher than the small cormes on per Plant of date