The Assessment of Weed Competition Effect on Growth and Yield of Cotton by Means of Chemical and Biological Fertilizers

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RAHIMIZADEH MAJID

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Journal: JOURNAL OF CROPS IMPROVEMENT (JOURNAL OF AGRICULTURE) Year:2020 | Volume:22 | Issue:2 Page(s): 245-255

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Title

The Assessment of Weed Competition Effect on Growth and Yield of Cotton by Means of Chemical and Biological Fertilizers

Author(s)

RAHIMIZADEH MAJID | Issue Writer Certificate

Keywords

Agronomical controlQ3

competitionQ2

cottonQ2

soil fertilityQ3

weed managementQ2

Abstract

A field experiment has been conducted between 2014 and 2015 to evaluate and compare the effects of N and P chemical fertilizers with biological N and P fertilizers on competition between cotton and weeds. The experiment has been with split plot arrangement in a randomized complete block design with three replications. The main plots include two levels of weed management practices, including weed free and weedy check. Sub plots have had five integrated applications of biological and chemical fertilizers: 1-Control (Without fertilizer), 2-Urea + Triplesuperphosphate (TSP), 3-Nitroxin + 50% urea + 100% TSP, 4-100% urea + Barvar2 + 50% TSP, and 5-Nitroxin + Barvar2 + 50% urea + 50% TSP. In the first year, weed control has increased LAI and number of boll per plant to 34% and 22%, respectively, and cotton yield has risen by 67% in the first year and 50% in the second. Fertilizer treatments have had a significant effect on stem length, LAI, number of sympodial branches and boll per plant, and yield of cotton. Under weed interference condition, the use of chemical fertilizers alone reduces cotton growth and yield as it increases competitive ability of weeds. However, reducing the urea consumption by half and replacing it with nitroxin, increases cotton yield by 61%, compared to the chemical fertilizer treatment, due to increasing number of boll per plant. This indicates that the use of biological fertilizers lessen the negative effects of chemical fertilizers and boosts crop competitiveness against weeds.

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APA: Copy

RAHIMIZADEH, MAJID. (2020). The Assessment of Weed Competition Effect on Growth and Yield of Cotton by Means of Chemical and Biological Fertilizers. JOURNAL OF CROPS IMPROVEMENT (JOURNAL OF AGRICULTURE), 22(2 ), 245-255. SID. https://sid.ir/paper/209541/en

Vancouver: Copy

RAHIMIZADEH MAJID. The Assessment of Weed Competition Effect on Growth and Yield of Cotton by Means of Chemical and Biological Fertilizers. JOURNAL OF CROPS IMPROVEMENT (JOURNAL OF AGRICULTURE)[Internet]. 2020;22(2 ):245-255. Available from: https://sid.ir/paper/209541/en

IEEE: Copy

MAJID RAHIMIZADEH, “The Assessment of Weed Competition Effect on Growth and Yield of Cotton by Means of Chemical and Biological Fertilizers,” JOURNAL OF CROPS IMPROVEMENT (JOURNAL OF AGRICULTURE), vol. 22, no. 2 , pp. 245–255, 2020, [Online]. Available: https://sid.ir/paper/209541/en

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