THE CRITICAL PERIOD OF WEED COMPETITION ON YIELD, YIELD COMPONENTS AND OIL YIELD OF BLACK SEED (NIGELLA SATIVA L.)

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SEYYEDI S.M.; REZVANI MOGHADDAM P.; GHORBANI R.; NASSIRI MOHALLATI M.

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Journal: Journal of Horticultural Science Year:2012 | Volume:26 | Issue:1 Page(s): 113-122

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Title

THE CRITICAL PERIOD OF WEED COMPETITION ON YIELD, YIELD COMPONENTS AND OIL YIELD OF BLACK SEED (NIGELLA SATIVA L.)

Author(s)

SEYYEDI S.M. | REZVANI MOGHADDAM P. | GHORBANI R. | NASSIRI MOHALLATI M. | Issue Writer Certificate

Keywords

WEED-INFESTED PERIODSQ2

WEED-FREE PERIODSQ2

GRAIN YIELDQ2

OIL YIELDQ1

Abstract

In order to determine the effect of weed competition periods on yield, yield components and OIL YIELD and critical period of weed control in black seed based on OIL YIELD loss, a field experiment was conducted at the Agricultural Research Station of Ferdowsi University of Mashhad, during 2009-2010 growing season. The experiment was laid out in Randomized Complete Block Design (RCBD) with 12 treatments and 3 replications. Two set of treatments consisted of weed-infested and WEED-FREE PERIODS were used. At the first set of treatments, weeds compete with black seed until 0, 14, 28, 42, 56 and 70 day after emergence (WEED-INFESTED PERIODS). At the second set, plots were kept free of weeds until the mentioned stage (weed-free periods). The result showed that weed infestation and weed free periods significantly affected grain, biological and OIL YIELDs of black seed. In addition, reduction in grain, biological and OIL YIELDs in which caused by the increased length of the weedinfested and the decreased length of WEED-FREE PERIODS, was accompanied by simultaneous reduction in number of lateral branch and follicle per plant, number of seed per follicle, seed weight per follicle, 1000-seed weight and harvest index. According to 2.5, 5 and 10% acceptable OIL YIELD loss, onset of critical period in black seed was recorded 12, 15 and 20 days after emergence (equal to 100.77, 125.02 and 168.49 growing degree days), respectively. In addition, based on above mentioned OIL YIELD loss, the end of critical period of weed control was determined 76, 74 and 70 days after emergence (equal to 1000.50, 955.02 and 877 growing degree days). Significant reducing in grain, biological and OIL YIELDs of black seed can be indicating weak competitiveness of this medicinal plant with its relative weed populations.

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APA: Copy

SEYYEDI, S.M., REZVANI MOGHADDAM, P., GHORBANI, R., & NASSIRI MOHALLATI, M.. (2012). THE CRITICAL PERIOD OF WEED COMPETITION ON YIELD, YIELD COMPONENTS AND OIL YIELD OF BLACK SEED (NIGELLA SATIVA L.). JOURNAL OF HORTICULTURE SCIENCE (AGRICULTURAL SCIENCES AND TECHNOLOGY), 26(1), 113-122. SID. https://sid.ir/paper/142273/en

Vancouver: Copy

SEYYEDI S.M., REZVANI MOGHADDAM P., GHORBANI R., NASSIRI MOHALLATI M.. THE CRITICAL PERIOD OF WEED COMPETITION ON YIELD, YIELD COMPONENTS AND OIL YIELD OF BLACK SEED (NIGELLA SATIVA L.). JOURNAL OF HORTICULTURE SCIENCE (AGRICULTURAL SCIENCES AND TECHNOLOGY)[Internet]. 2012;26(1):113-122. Available from: https://sid.ir/paper/142273/en

IEEE: Copy

S.M. SEYYEDI, P. REZVANI MOGHADDAM, R. GHORBANI, and M. NASSIRI MOHALLATI, “THE CRITICAL PERIOD OF WEED COMPETITION ON YIELD, YIELD COMPONENTS AND OIL YIELD OF BLACK SEED (NIGELLA SATIVA L.),” JOURNAL OF HORTICULTURE SCIENCE (AGRICULTURAL SCIENCES AND TECHNOLOGY), vol. 26, no. 1, pp. 113–122, 2012, [Online]. Available: https://sid.ir/paper/142273/en

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