Abstract
Irrigation methods and their intervals, and the rainfed and water requirements of saffron were studied based on a two-year field research for a local cultivar at Badgah Agricultural Experiment Station, Shiraz University, Islamic Republic of Iran. The experiment consisted of basin and furrow irrigation methods and three irrigation intervals (12, 24, 36 days) plus rainfed treatments. The experimental design was complete randomized block with four replications. Using basin irrigation method, the values of 2.32 and 5.4 kg ha−1 saffron yield were produced in 1998–1999 and 1999–2000, respectively. Saffron yields in furrow irrigation were 0.53 and 1.20 kg ha−1 in 1998–1999 and 1999–2000, respectively. In 2000, in basin irrigation the mean production was 10.8 t ha−1 corm among different irrigation treatments, significantly higher than in furrow irrigation (6.5 t ha−1). The highest yields for 1998–1999 and 1999–2000 were 3.14 kg ha−1 (24-day interval) and 8.35 kg ha−1 (12-day interval) in basin irrigation, respectively. Water use efficiencies of 1.86 g m−3, and 0.24 g m−3 were obtained for basin and furrow irrigation with 24-day intervals, respectively, in 2000, indicating that basin irrigation is preferred for saffron production.
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