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臺風“利奇馬”對水稻生產影響及災后恢復技術指導意見

2019-08-14 09:00:22 來源:農業農村部新聞辦公室 閱讀量:19817 評論

  【農機網 熱點關注】今年第9號臺風“利奇馬”已于8月10日凌晨在浙江溫嶺登陸,給華東5省(市)及東北部分地區水稻生產帶來影響,主要表現在三個方面:一是洪澇淹水易倒伏。受大風和強降水影響,浙江、上海、江蘇、安徽和遼寧部分地區水稻受淹,造成水稻倒伏和葉片機械損傷,不利于水稻灌漿。二是病蟲為害易重發。臺風過后,水稻植株易受傷,利于條斑病、白葉枯病等細菌性病害發生,以及稻曲病和稻瘟病等真菌病害的加重流行蔓延,同時稻飛虱和稻縱卷葉螟等遷飛害蟲也可能加重發生。三是低溫寡照易遲熟。今年東北地區水稻生育進程較常年偏晚,臺風帶來的連續陰雨和低溫寡照,將進一步加重貪青晚熟,“早霜”為害的風險增大。
 
  當前,長江下游地區一季中稻多處于拔節孕穗期,部分雜交稻進入破口抽穗期;東北地區一季稻陸續進入抽穗灌漿期,是水稻產量形成的關鍵時期。針對臺風對水稻生產帶來的不利影響和潛在風險,農業農村部水稻專家指導組會同全國農業技術推廣服務中心提出“兩促一降”的災后恢復技術指導意見。
 
  一是排澇降漬促恢復。受淹稻田應盡快排除田間積水,防止長時間積水導致莖葉腐化和爛根,減輕漬澇對水稻生長的影響。倒伏稻田應及時扶苗洗苗,恢復葉片正常光合機能,促進植株恢復生長。災后如遇高溫晴熱天氣,切忌一次性排盡田水,要保留田間3厘米左右水層,防止高強度葉面蒸發導致植株生理失水。部分雙季晚稻絕收田塊,應直接改種應季作物。
 
  二是科學追肥促生長。退水后3—5天追肥,長江下游地區災后生長偏弱的稻田,適量追施*氮肥,或采用磷酸二氫鉀加少量尿素均勻噴施,提高植株抗病力,加快植株恢復生長。東北地區部分貪青晚熟地塊,適時葉面噴施磷酸二氫鉀,提高水稻光合效率和灌漿速度,加快生育進程,促進安全成熟,降低“早霜”風險。
 
  三是嚴控病蟲降危害。加強水稻病蟲的監測預警和適時防治。長江下游地區的水稻細菌性病害以預防為主,重點是已發病田塊和新出現的發病中心,臺風過后及時用藥全面預防1—2次,防止病害流行危害。一季稻穗期病害防治應重點把握破口前7—10天的關鍵節點,預防稻曲病和稻瘟病,同時做好“兩遷”害蟲監測和藥劑防治。東北地區重點是預防稻瘟病,抓住抽穗末期前進行噴藥預防。
 
  (農業農村部水稻專家指導組 全國農業技術推廣服務中心)
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