c3518cb17d976b8
نوع مقاله : مقاله پژوهشی
نویسندگان
1 بخش گیاهپزشکی، موسسه تحقیقات برنج کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، رشت، ایران
2 گروه ساماندهی و بهبود نظامهای بهرهبرداری از ماشین، مرکز توسعه صنایع و مکانیزاسیون، وزارت جهاد کشاورزی، تهران، ایران
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Considering the increasing use of spraying drones in agriculture, this study aimed to evaluate the effects of irrigation method and spray carrier volume on the efficacy of drones in weed control in transplanted rice cultivation, using a premixed herbicide containing cyhalofop-butyl + penoxsulam (150 g a.i. ha⁻¹, OD 6%). The experiment was conducted as a split-plot arrangement of treatments, with the main factor being two irrigation methods (continuous flooding and intermittent irrigation) and the sub-factor consisting of five carrier volumes (10, 20, 40, 80, and 160 L ha⁻¹). Control treatments included a conventional backpack sprayer (350 L ha⁻¹), an untreated control, and manual weeding. Logestic regression models indicated that the spray carrier volume required for a 90% reduction in weed biomass under continuous flooding was 14.13 and 15.6 L ha⁻¹ for Echinochloa crus-galli and Bolboschoenus planiculmis, respectively, while under intermittent irrigation, the values were 24.06 and 58.02 L ha⁻¹, respectively. The highest economic yield was obtained under continuous flooding (4331 kg ha⁻¹) at a carrier volume of 20 L ha⁻¹ and under intermittent irrigation (3874 kg ha⁻¹) at 80 L ha⁻¹, with no statistically significant difference compared to higher carrier volumes, backpack spraying, or manual weeding. Given the more than 90% weed damage observed in the untreated control and the satisfactory efficacy of drone spraying, aerial application is recommended due to labor shortages and higher operational speed.
کلیدواژهها [English]