The effect of reduced doses of bentazon+ haloxyfop-R-methyl ester and nitrogen fertilizer on broad bean (Vicia faba L. ) yield

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Sepahvand Maryam; Elahifard Elham; Derakhshan Abolfazl

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Seminar Paper

Paper Information

Seminar: IRANIAN WEED SCIENCE CONGRESS
Year:2023 | Issue:10

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Title

The effect of reduced doses of bentazon+ haloxyfop-R-methyl ester and nitrogen fertilizer on broad bean (Vicia faba L. ) yield

Author(s)

Sepahvand Maryam | Elahifard Elham | Derakhshan Abolfazl

Keywords

Combinational Model

Crop-weed competition

Dose-response

Herbicide mixture

Abstract

Understanding the relationship between fertilizer and herbicide in competition between crops and weeds is a tool for predicting the extent of weed control and acceptable yield. A field experiment was conducted to investigate the effects of sub-lethal doses of herbicide and nitrogen fertilizer on the broad bean-weeds competition. Assessment of the broad bean yield was conducted at harvest time. The changes in broad bean yield with the application dose of Herbicide mixture at each nitrogen application level could be well described using the modified four-parameter sigmoid function. Broad bean seed yield increased under the conditions of using the highest herbicide dose against nitrogen, while the amount of CD50 (a dose of herbicide required to maintain 50% of the maximum bean yield) decreased. According to the results, there was no significant difference between the different levels of nitrogen in terms of the estimation of broad bean seed yield parameters in weed-infested conditions, but the amount of nitrogen significantly affected the estimated value for two parameters of broad bean seed yield in weed-free conditions and CD50, respectively. Then, the modified four-parameter sigmoid model by combining the models described above was able to describe 98% of the changes in broad bean yield with the amount of nitrogen and dose of Herbicide mixture. Based on this model, the broad bean yield under the conditions of application of the highest dose of Herbicide mixture in the treatment without nitrogen use (Ywf(N0)) was estimated to be equal to 105. 72 g m-2. Also, the required dose of Herbicide mixture to maintain half of the broad bean seed yield in the condition of least competition with weeds in the treatment without using fertilizer (CD50(N0)) was estimated to be 0. 60 of the recommended dose. The results of this research showed that reducing the competitive ability of weeds with the consumption of higher levels of nitrogen in the conditions of the use of herbicides can be justified.

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APA: Copy

Sepahvand, Maryam, Elahifard, Elham, & Derakhshan, Abolfazl. (2023). The effect of reduced doses of bentazon+ haloxyfop-R-methyl ester and nitrogen fertilizer on broad bean (Vicia faba L. ) yield. IRANIAN WEED SCIENCE CONGRESS. SID. https://sid.ir/paper/1128232/en

Vancouver: Copy

Sepahvand Maryam, Elahifard Elham, Derakhshan Abolfazl. The effect of reduced doses of bentazon+ haloxyfop-R-methyl ester and nitrogen fertilizer on broad bean (Vicia faba L. ) yield. 2023. Available from: https://sid.ir/paper/1128232/en

IEEE: Copy

Maryam Sepahvand, Elham Elahifard, and Abolfazl Derakhshan, “The effect of reduced doses of bentazon+ haloxyfop-R-methyl ester and nitrogen fertilizer on broad bean (Vicia faba L. ) yield,” presented at the IRANIAN WEED SCIENCE CONGRESS. 2023, [Online]. Available: https://sid.ir/paper/1128232/en

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