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湖北省出臺水稻“一噴多促”無人飛機作業技術指導意見

2024-08-21 09:16:00 來源:湖北省農業技術推廣總站 湖北省水稻大面積單產提升專家組 閱讀量:11916 評論

  【農機網 科技創新】 水稻“一噴多促”是指在水稻生長期間將葉面肥、調節劑、抗逆劑、殺蟲殺菌劑等混合噴施,一次作業可以實現促生長發育、促灌漿成熟、促災后恢復、促產量提高等多重效應,是有災防災、無災增產的關鍵措施。當前,全省水稻主產區早熟中稻已經進入抽穗灌漿期,中熟水稻處于孕穗期,晚播中稻和雙季晚稻處于分蘗期至拔節期,是產量形成關鍵期,也是“一噴多促”窗口期。為科學指導各地開展“一噴多促”工作,助力奪取全年水稻豐收,提出以下指導意見。
 
  一、技術適用范圍
 
  本意見適用于水稻“一噴多促”無人飛機施藥作業,所涉及的無人飛機作業參數、藥劑選擇和施藥參數等因素僅供參考,在實際應用中應根據氣象條件、生育期、藥劑助劑品種、無人飛機機型特點、周邊作物和施藥環境等進行調整和優化。大規模施藥前須開展小范圍試驗。
 
  二、作業環境要求
 
  水稻實施“一噴多促”噴施作業時,環境溫度不宜超過30℃。鑒于部分地區中午氣溫高,上升氣流強,因地制宜選擇上午10時前或下午16時后無露水時噴施作業,高溫天氣下可選擇在晚上施藥。留意天氣預報,噴后24小時內遇到中到大雨,要及時補噴,以保證噴施效果。
 
  三、飛行參數設置
 
  綜合考慮生育期、畝施藥液量、無人飛機機型和下壓風力大小等因素,設定飛行參數,確保噴霧均勻、無重噴漏噴、飄移損失小且植株無折損。作業時環境風速應小于三級風(≤3.3m/s),針對現有主流植保無人飛機,建議飛行速度3~5m/s,施藥液量1.5~3升/畝;飛行高度(離冠層高度)根據載荷重量適當調整,載荷重量<30L的飛行高度2~3m、載荷量≥30L的飛行高度3.5~4.5m,防治稻飛虱、紋枯病等莖基部病蟲害時應結合實際適當降低飛行高度;作業前應根據飛行高度確定有效作業噴幅,確保噴幅邊緣有足夠的藥液沉積量。
 
  四、防控藥劑選擇
 
  按照各地水稻生產實際情況,結合當地病蟲發生情況,科學混用殺蟲劑、殺菌劑、植物生長調節劑、葉面肥等,藥液配制時應確保所有組分混合均勻、混配穩定、協同增效且對作物無藥害。選用三氟苯嘧啶、四氯蟲酰胺、茚蟲威、乙基多殺菌素等殺蟲劑防治稻飛虱、稻縱卷葉螟、水稻二化螟等害蟲,選用三環唑、吡唑醚菌酯微囊懸浮劑、噻呋酰胺、嘧菌酯、肟菌·戊唑醇等殺菌劑防治稻瘟病、紋枯病、稻曲病等病害。合理混配蕓苔素內酯、噻苯隆、赤·吲乙·蕓苔、14-羥蕓·噻苯隆、調環酸鈣等植物生長調節劑進行葉面噴施,提高水稻抗逆能力,增加千粒重。
 
  五、噴霧助劑添加
 
  施藥作業前,宜在藥液中添加適量的改性植物油、礦物油等噴霧助劑并混合均勻,用于改善農藥藥液性能,提高霧滴沉降、抗飄移、耐雨水沖刷、抗蒸發等性能。
 
  六、其它注意事項
 
  (一)作業前調查作業周邊環境、確定作業區域及邊界。根據作業區域,綜合評估潛在風險,防止噴霧霧滴飄移造成非靶標生物毒害和周邊作物藥害。
 
  (二)進行霧滴密度檢測,保證飛防作業質量和施藥效果。建議調整飛行作業參數,提高施藥均勻性,確保每平方厘米霧滴數量在20個以上。
 
  (三)起降作業時遠離障礙物和人員,作業人員應穿戴必要的防護用品,避免處在噴霧的下風位,嚴禁在施藥區穿行,作業時禁止吸煙及飲食。
 
  (四)作業后及時跟蹤調查病蟲害防治效果和產量性狀并做好記錄。
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