Chemical weed control in paddy fields under intermittent irrigation

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Asadollahi Sharifi Farzaneh; AMINPANAH HASHEM; YAGHOUBI BIJAN

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Journal: Cereal Research Year:2018 | Volume:8 | Issue:1 Page(s): 45-56

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Title

Chemical weed control in paddy fields under intermittent irrigation

Author(s)

Asadollahi Sharifi Farzaneh | AMINPANAH HASHEM | YAGHOUBI BIJAN | Issue Writer Certificate

Keywords

Herbicide efficacyQ2

Irrigation methodQ1

Paddy fieldsQ2

Yield lossQ3

Abstract

Water resources shortage threatens the sustainability of continuous flooding rice culture. To investigate the effect of initial flooding duration on Herbicide efficacy and rice Yield loss, a field experiment was conducted at Rice Research Institute of Iran, Rasht, Iran, in 2015. The experiment was arranged in a factorial arrangement based on randomized complete block design with three replications. The experimental factors were two rice cultivars (Hashemi and Gilaneh) and five initial flooding durations (flooding for 2, 4, 6, 8 and 12 weeks after transplanting and then applying intermittent irrigation). Consistent with the Paddy fields Irrigation method in northern Iran, 12-week flooding duration was considered as continuous flooding irrigation. Results showed that there was no significant difference in Herbicide efficacy between Hashemi (87. 9%) and Gilaneh (85. 6%) cultivars. No significant reduction in Herbicide efficacy was observed when initial flooding duration reduced from 12 to 6 weeks, but with further reduction in initial flooding duration to four and two weeks, Herbicide efficacy was significantly reduced. The highest paddy yield (3989. 2 kg. ha-1) was observed in permanent flooding (flooding for 12 weeks) + herbicide application treatment and the paddy yield was decreased about 10% by reducing the initial flooding duration to six weeks but it was not statistically significant. With further decrease in initial flooding duration to four and two weeks, rice paddy yield reduced significantly by 16% and 31%, respectively. In conclusion, results of this experiment revealed that under water shortage conditions, it is necessary to apply initial flooding duration at least for 6 weeks after transplanting for obtaining favorable Herbicide efficacy (more than 90%) without paddy Yield loss compared to permanent flooding treatment.

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APA: Copy

Asadollahi Sharifi, Farzaneh, AMINPANAH, HASHEM, & YAGHOUBI, BIJAN. (2018). Chemical weed control in paddy fields under intermittent irrigation. CEREAL RESEARCH, 8(1 ), 45-56. SID. https://sid.ir/paper/364092/en

Vancouver: Copy

Asadollahi Sharifi Farzaneh, AMINPANAH HASHEM, YAGHOUBI BIJAN. Chemical weed control in paddy fields under intermittent irrigation. CEREAL RESEARCH[Internet]. 2018;8(1 ):45-56. Available from: https://sid.ir/paper/364092/en

IEEE: Copy

Farzaneh Asadollahi Sharifi, HASHEM AMINPANAH, and BIJAN YAGHOUBI, “Chemical weed control in paddy fields under intermittent irrigation,” CEREAL RESEARCH, vol. 8, no. 1 , pp. 45–56, 2018, [Online]. Available: https://sid.ir/paper/364092/en

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