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山西省當(dāng)前玉米田間管理技術(shù)要點(diǎn)

2024-08-01 08:34:13 來(lái)源:山西省農(nóng)業(yè)農(nóng)村廳 閱讀量:14037 評(píng)論

導(dǎo)讀:針對(duì)本年度氣候情況,提出以下四點(diǎn)后期管理措施。

  【農(nóng)機(jī)網(wǎng) 熱點(diǎn)關(guān)注】 目前,我省春玉米大多處于灌漿期,夏玉米處于大喇叭口期。針對(duì)本年度氣候情況,提出以下四點(diǎn)后期管理措施。
 
  一、旱情應(yīng)對(duì)措施
 
  1.對(duì)有灌溉條件的區(qū)域,要充分利用現(xiàn)有田間水利設(shè)施修復(fù),采用滴灌、壟灌、微噴灌等節(jié)水灌溉措施,組織農(nóng)戶統(tǒng)籌安排及時(shí)灌溉,灌溉時(shí)要注意避開(kāi)大風(fēng)等極端氣象,避免發(fā)生倒伏等現(xiàn)象。
 
  2.對(duì)雨養(yǎng)旱作區(qū)域,建議地方農(nóng)業(yè)、氣象部門(mén)積極溝通,采用燃放焰條和發(fā)射增雨火箭,人工增雨,緩解旱情。也還可采用噴施抗旱劑和葉面肥的方式,增強(qiáng)玉米抗旱能力。一但出現(xiàn)有效降雨,一定要抓住機(jī)會(huì)加強(qiáng)追肥、病蟲(chóng)害防治等田間管理。
 
  3.在高溫時(shí)期,要特別注意玉米的授粉情況,出現(xiàn)授粉不良時(shí)要及時(shí)采用無(wú)人機(jī)輔助授粉,提高結(jié)實(shí)率。
 
  二、澇害應(yīng)對(duì)措施
 
  1.盡快排除積水,降低田間漬害程度。連續(xù)降雨田間積水過(guò)多,會(huì)導(dǎo)致土壤缺氧、阻礙根系呼吸代謝、吸收養(yǎng)分等活動(dòng),甚至導(dǎo)致?tīng)€根、爛葉、引發(fā)根腐病、莖腐病等病害,要及時(shí)排水,通過(guò)挖排水溝、抽水泵抽水等方式及時(shí)將田間的積水排走。
 
  2.及時(shí)開(kāi)展中耕松土。通過(guò)中耕還可將表層與底層土壤之間的毛細(xì)管水通道切斷,在表層土壤中形成疏松的覆蓋層,利于深層水分的快速散失,起到避免漬害發(fā)生的效果。
 
  3.做好倒伏玉米植株的管理。玉米植株在大喇叭口期前發(fā)生漬害倒伏的和在拔節(jié)期后倒伏角度若小于45度的,不需人工扶正即可自行直立;在抽雄散粉階段后出現(xiàn)漬害、倒伏現(xiàn)象的,需進(jìn)行人工扶正,并在莖基部適量培土,用腳踏實(shí),經(jīng)過(guò)2-3天即可有新的根系長(zhǎng)出。
 
  三、中后期病蟲(chóng)害應(yīng)對(duì)措施
 
  8月份需注意病害流行擴(kuò)散,建議農(nóng)戶提前防控,盡早噴施殺螨劑、殺蟲(chóng)劑、殺菌劑,配合葉面肥等噴施實(shí)現(xiàn)一噴多防和一噴多促,并與植物生長(zhǎng)調(diào)節(jié)劑蕓苔素內(nèi)酯以及葉面肥磷酸二氫鉀等配合使用,達(dá)到防蟲(chóng)治病,增產(chǎn)提質(zhì)的目標(biāo)。
 
  1.降雨偏少地區(qū)。重點(diǎn)關(guān)注葉螨、雙斑螢葉甲等害蟲(chóng)的發(fā)生發(fā)展動(dòng)態(tài),可用噻蟲(chóng)胺、噻蟲(chóng)嗪、氯蟲(chóng)苯甲酰胺等殺蟲(chóng)劑防治。
 
  2.高溫高濕地區(qū)。重點(diǎn)關(guān)注大斑病和莖腐病的流行與發(fā)展,可選用枯草芽孢桿菌、井岡霉素A、苯醚甲環(huán)唑、吡唑醚菌酯、丙環(huán)·嘧菌酯等殺菌劑噴施。
 
  四、其它管理措施
 
  1.增加水肥投入。有滴灌條件的地塊應(yīng)加大水肥投入,利用水肥一體化設(shè)備追施水溶肥或微生物菌肥,無(wú)灌溉條件的區(qū)域可采用無(wú)人機(jī)葉面噴施液態(tài)氮、生物鉀、微量元素和羥基蕓苔素組成的葉面肥套餐,防止后期脫肥早衰,有效調(diào)節(jié)玉米生理機(jī)能,增強(qiáng)玉米后期抗病性和持綠度。
 
  2.適時(shí)晚收。加強(qiáng)培訓(xùn)宣傳,建議農(nóng)戶盡量晚收,在不存在莖腐病倒伏和葉片未枯死的前提下,春玉米可在早霜時(shí)間再進(jìn)行收獲,充分利用光熱資源,延長(zhǎng)灌漿時(shí)間和站桿脫水時(shí)間,以獲得更高產(chǎn)量。
 
  3.機(jī)收減損。積極組織農(nóng)機(jī)手,開(kāi)展機(jī)收減損技術(shù)培訓(xùn),收獲機(jī)維修保養(yǎng)調(diào)試。積極宣傳新技術(shù)新裝備,引導(dǎo)機(jī)具以舊換新,提高新裝備應(yīng)用水平,進(jìn)一步降低機(jī)收損失率。
 
  來(lái)源|廳科教處
 
  監(jiān)審|馮耀斌
 
  責(zé)編|馮曉君
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