SUNFLOWER SUMMER-PLANTING YIELD AS AFFECTED BY PLANT POPULATION AND NITROGEN APPLICATION RATES

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SALEHI FOROUD; BOHRANI M.J.

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Journal: Iran Agricultural Research Year:2000 | Volume:19 | Issue:1 Page(s): 63-72

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Title

SUNFLOWER SUMMER-PLANTING YIELD AS AFFECTED BY PLANT POPULATION AND NITROGEN APPLICATION RATES

Author(s)

SALEHI FOROUD | BOHRANI M.J. | Issue Writer Certificate

Keywords

SUNFLOWERQ3

PLANT POPULATIONQ3

NITROGEN RATESQ3

HEAD DIAMETERQ3

SEDD AND OIL YIELDSQ3

Abstract

Two similar experiments were conducted at two Agricultural Experiment Stations (Bajgah and Kushkak), Shiraz University, Shiraz, I.R. Iran in 1995 to evaluate the effects of PLANT POPULATION and N application rates on yield and yield components of a semi dwarf hybrid of SUNFLOWER (Helianthus annuus L. c.v. Mehr) as summer planting. Both experiments were conducted as split plot arranged in a randomized complete block design with 4 replications. The seeds were drilled in sub-plots at row distances of 60 cm apart and 15, 25 and 35 cm between plants within rows. Nitrogen fertilizer was applied at 0, 23, 46, 69 and 92 kg N ha-1 as urea in main plots. Increasing PLANT POPULATION decreased HEAD DIAMETER, seed number and weight per plant and seed protein percentages at both locations. Seed and oil yields increased with increasing PLANT POPULATION and reached a maximum at a population of 6.66 plants m-2 (25cm between plants in row) at both locations. HEAD DIAMETER, seed number and weight per plant and seed and oil yields increased with increasing N application at both locations. In general, HEAD DIAMETER, seed and oil yields were higher at Bajgah where favorable conditions for crop growth and seed filling prevailed. The optimum PLANT POPULATION and N rate were 6.66 plants m-2 and 69 kg N ha-1 for both locations.

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APA: Copy

SALEHI, FOROUD, & BOHRANI, M.J.. (2000). SUNFLOWER SUMMER-PLANTING YIELD AS AFFECTED BY PLANT POPULATION AND NITROGEN APPLICATION RATES. IRAN AGRICULTURAL RESEARCH, 19(1), 63-72. SID. https://sid.ir/paper/16118/en

Vancouver: Copy

SALEHI FOROUD, BOHRANI M.J.. SUNFLOWER SUMMER-PLANTING YIELD AS AFFECTED BY PLANT POPULATION AND NITROGEN APPLICATION RATES. IRAN AGRICULTURAL RESEARCH[Internet]. 2000;19(1):63-72. Available from: https://sid.ir/paper/16118/en

IEEE: Copy

FOROUD SALEHI, and M.J. BOHRANI, “SUNFLOWER SUMMER-PLANTING YIELD AS AFFECTED BY PLANT POPULATION AND NITROGEN APPLICATION RATES,” IRAN AGRICULTURAL RESEARCH, vol. 19, no. 1, pp. 63–72, 2000, [Online]. Available: https://sid.ir/paper/16118/en

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