TY  - JOUR
T1  - Effects of Planting Date and Irrigation Management on Sunflower Yield and Yield Components
AU - , Fatemeh Taheri Asbag AU - , Abdollah Hasanzadeh Gorttapeh AU - , Amir Fayaz-Moghadam AU - , Maryam Saber-Rezaie AU - , Farideh Feghnabi AU - , Mosa Eizadkhah AU - , Sharara Jahannavard AU - , Simin Parvizi AU - , Somyeh Naghi Moghadam-Pour 
JO  - Research Journal of Biological Sciences
VL  - 4
IS  - 3
SP  - 306
EP  - 308
PY  - 2009
DA  - 2001/08/19
SN  - 1815-8846
DO  - rjbsci.2009.306.308
UR  - https://makhillpublications.co/view-article.php?doi=rjbsci.2009.306.308
KW  - Helianthus annus L.
KW  -sowing date
KW  -irrigation
KW  -water stress
KW  -yield
AB  - Sunflower is one of the most cultivated oil crops in the world. In Iranian environments, where water deficit frequently occurs, early sowing and irrigation are used to overcome environmental constraints due to water scarcity. Since, in the literature, the data on the effect of these agronomic techniques on sunflower seed yield and yield component are essential and contrasting, the aim of this study was to evaluate the effect of the sowing time and the water regime on seed yield and yield component in Iranian environment. For this aim, one standard hybrid (Euroflor) sown in spring at the 3 different dates were cultivated in Western Iranian under 5 water regimes, viz I<SUB>1,</SUB> IW/CPE (irrigation water: cumulative pan evaporation) ratio 0.6. I<SUB>2</SUB>, at 25 days after sowing + flower-bud initiation; I<SUB>3</SUB>, at 25 days after sowing + complete flowering; I<SUB>4</SUB>, at 25 days after sowing + seed filling; I<SUB>5</SUB>, at 25 days after sowing + complete flowering + seed filling in 2007. Yield and its main component were positively affected by irrigation and by the earlier sowing date. At early sowing date the yield and yield components showed notable increase. The increase in these parameters observed also in supplementary irrigation.
ER  -