THE EFFECT OF SOWING DATES OF SUNFLOWER CULTIVARS ON THE SEED YIELD AND RELATIVE PROPORTIONS OF YIELD COMPONENTS

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REZADUST S.; VAZAN S.; KARIMI M.; KASHANI A.; ARDAKANI M.R.

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Journal: JOURNAL OF CROP ECOPHYSIOLOGY (AGRICULTURE SCIENCE) Year:2009 | Volume:3 | Issue:10 Page(s): 81-93

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Title

THE EFFECT OF SOWING DATES OF SUNFLOWER CULTIVARS ON THE SEED YIELD AND RELATIVE PROPORTIONS OF YIELD COMPONENTS

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Keywords

PLANTING DATEQ2

STEPWISE REGRESSIONQ3

SUNFLOWERQ3

YIELD COMPONENTSQ3

Abstract

To increase yield of SUNFLOWER, it is essential to determine proper sowing dates for its cultivars. A factorial experiment was carried out with 2 factors in RCBD with 3 replications at the Agricultural and Natural Rresources Research Station of Khoy, Iran, during 2007-2008. Results showed that sowing date had significant effects on the plant height, stem diameter, percentage of empty achenes and harvest index. Latest PLANTING DATE reduced all of the parameters under study (except empty achenes percentage). Delaying PLANTING DATE reduced seed yield. The yield of Azar-gol, due to its greater head diameter, seed number per head and heavy seeds, was higher than the others. Highest seed yield was obtained from Azar-gol at second sowing date. Cultivars producing over 3000 kg seeds per hectare at latest sowing date in this regions, would be promising ones to be used in double cropping system and thus increase farmers income.

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APA: Copy

REZADUST, S., VAZAN, S., KARIMI, M., KASHANI, A., & ARDAKANI, M.R.. (2009). THE EFFECT OF SOWING DATES OF SUNFLOWER CULTIVARS ON THE SEED YIELD AND RELATIVE PROPORTIONS OF YIELD COMPONENTS. JOURNAL OF CROP ECOPHYSIOLOGY (AGRICULTURE SCIENCE), 3(10), 81-93. SID. https://sid.ir/paper/182737/en

Vancouver: Copy

REZADUST S., VAZAN S., KARIMI M., KASHANI A., ARDAKANI M.R.. THE EFFECT OF SOWING DATES OF SUNFLOWER CULTIVARS ON THE SEED YIELD AND RELATIVE PROPORTIONS OF YIELD COMPONENTS. JOURNAL OF CROP ECOPHYSIOLOGY (AGRICULTURE SCIENCE)[Internet]. 2009;3(10):81-93. Available from: https://sid.ir/paper/182737/en

IEEE: Copy

S. REZADUST, S. VAZAN, M. KARIMI, A. KASHANI, and M.R. ARDAKANI, “THE EFFECT OF SOWING DATES OF SUNFLOWER CULTIVARS ON THE SEED YIELD AND RELATIVE PROPORTIONS OF YIELD COMPONENTS,” JOURNAL OF CROP ECOPHYSIOLOGY (AGRICULTURE SCIENCE), vol. 3, no. 10, pp. 81–93, 2009, [Online]. Available: https://sid.ir/paper/182737/en

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