Rice response to fluridone following topsoil removal on a precision-leveled field

IF 1.3 Q3 AGRONOMY
Thomas R. Butts, Maria C. C. R. Souza, Jason K. Norsworthy, L. Tom Barber, Jarrod T. Hardke
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Abstract

Furrow-irrigated rice (Oryza sativa L.) production requires additional management options without the cultural strategy of a flood. In 2023, fluridone (Brake) was registered for use in rice production. Precision-leveling land is an important aspect of maintaining an effective irrigation flow path; however, the removal of topsoil can severely impact crop response from residual herbicides. The objective of this study was to evaluate the impact of fluridone on rice response when applied to a precision-leveled field following topsoil removal. An on-farm field study was conducted in 2023 near Osceola, AR, with a Sharkey-Steele clay complex soil texture. The study consisted of six herbicide treatments applied at the rice three-leaf stage. These treatments included clomazone, quinclorac, and fluridone at three rates (0.5×, 1×, and 2× of a label rate) and a nontreated control. Across evaluation times, maximum visual rice injury was greater than 25% and 65% for the fluridone 1× and 2× treatments, respectively. Rice canopy coverage was reduced in the fluridone 1× and 2× treatments compared to all other treatments from 6 to 10 weeks after application (WAA). Rice heading in the fluridone 2x treatment was delayed by more than 60 and 30 percentage points at 11 and 12 WAA, respectively, compared to all other treatments. Rough rice yield in the fluridone 2× treatment was reduced by 21% compared to all other treatments. Overall, fluridone 1× and 2× rates caused substantial rice injury and would not be recommended on a precision-leveled field.

Abstract Image

精确平整的田地表层土被清除后水稻对氟啶虫酰胺的反应
沟灌水稻(Oryza sativa L.)生产需要更多的管理选择,而不需要洪水这一文化策略。2023 年,氟啶酮(Brake)注册用于水稻生产。精确平整土地是保持有效灌溉流道的一个重要方面;然而,表土的移除会严重影响作物对残留除草剂的反应。本研究的目的是评估氟啶虫酰胺在去除表土后施用到精确平整的田地中对水稻反应的影响。2023 年,在阿肯色州奥西奥拉附近进行了一项农场田间研究,该地区土壤质地为 Sharkey-Steele 粘土复合土。研究包括在水稻三叶期施用六种除草剂处理。这些处理包括氯马酮、喹草酮和氟啶虫酰胺,施用量分别为标签施用量的 0.5 倍、1 倍和 2 倍,以及未施用除草剂的对照。在不同的评价时间,氟啶虫酰胺 1 倍和 2 倍处理的水稻最大目视伤害分别超过 25% 和 65%。施药后 6 到 10 周(WAA),氟啶酮 1× 和 2× 处理的水稻冠层覆盖率低于所有其他处理。与所有其他处理相比,氟啶酮 2× 处理的水稻在施药后 11 和 12 WAA 分别推迟了 60 和 30 多个百分点。与所有其他处理相比,氟啶酮 2× 处理的糙米产量降低了 21%。总体而言,氟啶酮 1× 和 2× 会对水稻造成严重伤害,因此不建议在精确整地的田块上使用。
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来源期刊
Agrosystems, Geosciences & Environment
Agrosystems, Geosciences & Environment Agricultural and Biological Sciences-Agricultural and Biological Sciences (miscellaneous)
CiteScore
2.60
自引率
0.00%
发文量
80
审稿时长
24 weeks
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