EFFECT OF SUNFLOWER CULTIVAR ON SEED PRODUCTION INDEX OF REDROOT PIGWEED (AMARANTHUS RETROFLEXUS)

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MIRSHEKARI B.

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Journal: JOURNAL OF RESEARCH IN CROP SCIENCES Year:2010 | Volume:2 | Issue:6 Page(s): 67-80

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Title

EFFECT OF SUNFLOWER CULTIVAR ON SEED PRODUCTION INDEX OF REDROOT PIGWEED (AMARANTHUS RETROFLEXUS)

Author(s)

MIRSHEKARI B. | Issue Writer Certificate

Keywords

BIOLOGICAL YIELDQ2

REDROOT PIGWEEDQ3

RELATIVE TIME OF EMERGENCEQ3

SEED PRODUCTION INDEXQ3

SUNFLOWERQ2

Abstract

To evaluate the REDROOT PIGWEED (Amaranthus retroflexus) reaction with a view to BIOLOGICAL YIELD and seed production at interference with SUNFLOWER, a factorial experiment was conducted with SUNFLOWER cultivars (Azarghol, Hysun and Allstar), REDROOT PIGWEED densities (8.3, 25 and 41.7 plants m-2) and relative times of weed emergence (emerged with SUNFLOWER; 15 and 30 days after SUNFLOWER emergence) during 2006-7 in Tabriz. Results showed that, REDROOT PIGWEED biomass reduced with decreasing of density and delaying in emergence time. Averaged SUNFLOWER cultivars, seed production in REDROOT PIGWEED in treatment of 25 weeds m-2 at 15 days after emergence with SUNFLOWER was 1.7 times greater than full season interference of 8.3 weeds m-2. Averaged weed densities, with each week delay in REDROOT PIGWEED emergence at between first-second and second-third levels of weed interference, weed seed number per unit area ranged from 23 to 15×103, 55 to 23×103 and 45 to 62×103 in SUNFLOWER cultivars, respectively. Each day delay in weed emergence between second-third levels of interference time could decrease seed number per weed plant in Allstar greater than Azarghol and Hysun cultivars. Decrease of weed density and delaying in interference time caused a significant reduction on weed SEED PRODUCTION INDEX at interference with all cultivars.

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پتانسیل تولید بذر تاج خروس در شرایط تک کشتی و رقابت با ذرت دانه ای (کنگره)

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APA: Copy

MIRSHEKARI, B.. (2010). EFFECT OF SUNFLOWER CULTIVAR ON SEED PRODUCTION INDEX OF REDROOT PIGWEED (AMARANTHUS RETROFLEXUS). JOURNAL OF RESEARCH IN CROP SCIENCES, 2(6), 67-80. SID. https://sid.ir/paper/168074/en

Vancouver: Copy

MIRSHEKARI B.. EFFECT OF SUNFLOWER CULTIVAR ON SEED PRODUCTION INDEX OF REDROOT PIGWEED (AMARANTHUS RETROFLEXUS). JOURNAL OF RESEARCH IN CROP SCIENCES[Internet]. 2010;2(6):67-80. Available from: https://sid.ir/paper/168074/en

IEEE: Copy

B. MIRSHEKARI, “EFFECT OF SUNFLOWER CULTIVAR ON SEED PRODUCTION INDEX OF REDROOT PIGWEED (AMARANTHUS RETROFLEXUS),” JOURNAL OF RESEARCH IN CROP SCIENCES, vol. 2, no. 6, pp. 67–80, 2010, [Online]. Available: https://sid.ir/paper/168074/en

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