ابوالقاسم الحانی
عبدالقادر خورسند

In order to study the effects of sowing date on grain yield and yield components of two spring safflower cultivars, an experiment was conducted at Darab Agricultural Research Station dudng 2004-2005 cropping seasons. The experimental design was a split plot aranged in a randomized compelet block design (RCBD) with four replications. Four sowing dates (Oct.22, Nov.!l, Dec.] and Dec.2l) were assigned to main plots and two spring safflower cultivars (Local Esphahan, and III 11) were randomized to sub plots. The simple analysis of variance on trials showed that was higly significant difference amange the genotypes. The resalts of two years combind analysis showed that the interaction of year x lines was highly significant difference. The mean grain yield of two years showed, the highest grain yield were as second sowing date (3025.5 kglha) and fourth sowing date were lowest grain yield (2178 kg/ha). The III 11 cultivars in second sowing date was 3117.5 kglha the highest grian yield. The Novamber 11 is recommend far sowing date of spring safflower under warm codition of south of Fars. Key words: Sowing date, Spring safflower, grain yield

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