《2025年安徽省小麥春季田管技術指導意見》印發(fā)

2025-02-17 09:16:38 來源:安徽省農業(yè)技術推廣總站 閱讀量:17458 評論

安徽省農業(yè)技術推廣總站關于印發(fā)2025年全省小麥油菜春季田管技術指導意見的通知
 
  各市、縣(市、區(qū))農技中心、種植業(yè)管理(技術服務)中心(局):
 
  為貫徹落實全國春季田管暨春耕備耕工作視頻會議精神,精準精細抓好春季小麥油菜田間管理,促弱控旺穩(wěn)壯,促進苗情進一步轉化升級,針對當前小麥油菜苗情長勢特點,我站制定了《2025年全省小麥春季田管技術指導意見》《2025年全省油菜春季田管技術指導意見》,現印發(fā)給你們。請結合本地實際抓好落實,為奪取夏季糧油豐產豐收打好基礎。
 
  安徽省農業(yè)技術推廣總站
 
  2025年2月12日
 
2025年全省小麥春季田管技術指導意見
 
  立春已過,氣溫逐漸回升,全省小麥自南向北將陸續(xù)進入返青—起身—拔節(jié)階段,正是抓好春季田間管理、促進苗情轉化升級、穩(wěn)穗增粒的關鍵時期。目前面上小麥苗情長勢較好,一類苗和二類苗占比達87.9%,較常年同期增加1.1個百分點。但也存在一些問題:一是苗情兩極分化,“兩頭苗”現象較為突出;二是前期“旱凍疊加”導致局部受凍;三是稻茬麥區(qū)部分田塊土壤墑情偏多,影響小麥根系生長;四是隨著溫度的升高,病蟲草害將逐漸發(fā)生;五是早春氣溫起伏不定,變化較大,農業(yè)氣象災害風險較大。針對春季小麥苗情長勢和氣象特點,堅持“因地制宜、因苗施策、控旺促弱、分類管理、綠色防控、防災減災”的技術路線,以生育進程為主線,以苗情墑情病蟲草情為依據,以弱旺苗為重點,抓住早春有利時機,加強春季小麥田間管理,構建合理群體,搭好豐產架子,再奪夏糧豐收。
 
  1.因苗早施返青肥。對因播種偏晚、底肥不足、整地播種質量差、秸稈還田鎮(zhèn)壓不實及干旱凍害等原因造成苗黃苗弱的田塊,要抓住近期降水的有利時機,及早追施返青肥,一般畝施尿素5公斤左右,以促進春季分蘗早生快長。對前期肥料充足且生長較好的壯苗或旺苗麥田,則可不施返青肥,以控制無效分蘗,避免群體過大,造成后期倒伏和病害發(fā)生。
 
  2.適時化控防倒伏。對于部分因搶墑早播、播量大,群體偏大或施肥過多,發(fā)生旺長的麥田,或種植抗倒伏能力差的高桿品種田塊,根據土壤墑情及天氣情況,在小麥返青起身期適時選用壯豐安、多效唑、烯效唑等化控劑進行化控,或機械鎮(zhèn)壓,以縮短基部節(jié)間,促進植株健壯生長,壯稈防倒。
 
  3.適時防控病蟲草害。針對冬前沒有化除田間雜草較多或除草效果不好的麥田,要緊抓氣溫回升的有利時機開展化除,根據田間雜草發(fā)生情況,選擇對路藥劑,抓住晴天中午溫度較高時段及時開展化除,要注意氣溫、墑情、雜草類型、用藥時期及用藥量,避免發(fā)生藥害。要突出抓好小麥赤霉病、紋枯病、麥蜘蛛、蚜蟲等重點病蟲的監(jiān)測預報,做到早預防、早防控。
 
  4.科學普施拔節(jié)肥。追施拔節(jié)肥是提高小麥產量和品質的關鍵措施,對優(yōu)質強筋小麥生產尤為重要。拔節(jié)肥追施時間掌握在群體葉色褪淡,一類苗于3月中下旬,每畝追施尿素10~15公斤。已追施過返青肥的二、三類苗,可推遲到3月下旬至4月上旬,畝追施尿素6~8公斤。鑒于目前小麥基肥施用量一般都較為充足,為避免因施肥過量導致小麥生育中后期貪青、倒伏,務必掌握好施肥總量。遇旱時追肥與澆水相結合。
 
  5.清溝理墑防漬害。沿淮江淮稻茬麥區(qū),隨著氣候轉暖及降水量的加大,田間濕度大,易出現積水,要及時清溝理墑,實現“三溝”配套,保持田間排水通暢,除濕降漬,促進根系健壯生長。
 
  6.防范“倒春寒”和低溫冷害。密切關注天氣變化,在寒流或低溫冷害到來之前,對干旱麥田及時進行澆灌,保證墑情充足,減輕低溫危害程度,或噴施植物生長調節(jié)劑增強小麥抗凍能力。凍害發(fā)生后,及時追施速效氮肥或葉面噴施尿素和磷酸二氫鉀、有機水溶肥混合液。發(fā)生部分莖蘗幼穗凍死的麥田及時結合澆水灌溉,畝追施尿素5~10公斤,促進恢復生長。
 
  2025年全省油菜春季田管技術指導意見
 
  當前立春剛過,油菜陸續(xù)現蕾抽薹,進入營養(yǎng)生長與生殖生長并進期。入冬以來全省降水偏少、溫度偏高,氣候條件整體有利于油菜生長,目前全省油菜苗情總體較好,但存在冬春連旱、倒春寒以及病蟲大發(fā)生風險。針對當前油菜苗情和春季氣候特點,提出2025年油菜春季田間管理暨防災減災技術。
 
  1.清理三溝保根系發(fā)育。受前期旱情影響,農戶普遍對清溝排漬重視不夠。對易發(fā)生漬害田塊,要做好田外排水溝的疏通和排澇設施維護,確保溝系暢通,實現明水能排、暗水能濾,提早防范區(qū)域性季節(jié)性陰雨漬害,促進油菜根系生長發(fā)育,防止早衰。對“根拔”現象比較嚴重的田塊,要結合清溝培土壅根,減輕根系損傷。
 
  2.防寒抗凍保安全生長。春季我省氣溫起伏較大,易出現倒春寒天氣,導致抽薹油菜薹莖受凍斷裂。各地要密切關注天氣變化,備好速效肥、抗寒劑等物資和設備。在寒潮來臨前,選擇晴天氣溫高、葉片干爽時葉面噴施蕓薹素內酯、磷酸二氫鉀或含鉀有機水溶肥等抗逆劑,提高油菜防寒抗凍能力。已出現凍害的田塊,在晴天及時清理凍死植株和葉片,割除受凍薹莖,并視苗情補噴藥肥。
 
  3.分類管理保春發(fā)快長。結合降雨或灌水,根據油菜長勢適時施用返青肥。對旺長田塊,要適度控制肥水,少施肥或不施肥。對長勢健壯的田塊,畝追施氮肥5~6公斤和鉀肥2~3公斤。對前期受凍受旱較重或苗小苗弱的田塊,可結合噴施葉面肥,及早補施氮肥8-10公斤、鉀肥3公斤和硼肥200克,促進快速春發(fā)。
 
  4.一促四防保開花結莢。受凍油菜較正常油菜抗性降低,更易引發(fā)病害,需重點關注。一旦田間病蟲情發(fā)生擴散,盡快噴施對路藥預防。油菜初花期可使用氟唑菌酰羥胺、啶酰菌胺、咪鮮胺等殺菌劑混合液替代廣譜殺菌劑,混合硼肥、磷酸二氫鉀等肥藥實行統(tǒng)防統(tǒng)治。對菌核病重發(fā)田塊,盛花期需再噴施一次,主要殺菌劑需輪換使用,防止產生抗藥性。田間有蚜株率達10%以上時需防治蚜蟲,處于花期的田塊使用氨基甲酸酯或氟啶蟲胺腈等對蜜蜂相對安全藥劑,非花期可使用噻蟲嗪防治。此外,根腫病發(fā)生較重的地區(qū)可葉片噴灑生根劑,誘導基部產生新根,實現油菜帶病存活,并于施用生根劑5天后,每畝施用5公斤氮肥和3公斤鉀肥,為油菜補充營養(yǎng)。
 
  5.機收減損保增產增收。針對目前油菜聯(lián)合機械收獲損失率高、商品菜籽品質低等問題,條件適宜情況下,推薦采用分段機械收獲。在全田80%左右油菜植株呈枇杷黃時,用割曬機或人工割倒,晾曬4-5天后(95%以上的角果已干燥),再用機械撿拾脫粒。若采用一次性機械聯(lián)合收獲,可在油菜八成黃、主花序中部角果中籽粒轉色變?yōu)楹稚珪r,用無人機噴施噴施催枯劑,5天后選擇晴氣上午收獲。如不施用催枯劑,選擇直接收獲應在全田油菜外觀顏色全部變枯黃色或褐色、完熟度基本一致時,選早晚時段收獲,收獲后應及時晾曬種子,降低籽粒水分,保證品質,安全入庫存儲。
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