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玉米應(yīng)對(duì)臺(tái)風(fēng)影響及災(zāi)后恢復(fù)生產(chǎn)技術(shù)意見

2024-07-29 08:40:51 來(lái)源:全國(guó)農(nóng)技中心 閱讀量:18888 評(píng)論

導(dǎo)讀:針對(duì)臺(tái)風(fēng)對(duì)玉米生產(chǎn)可能造成的不利影響和潛在風(fēng)險(xiǎn),農(nóng)業(yè)農(nóng)村部玉米專家指導(dǎo)組會(huì)同全國(guó)農(nóng)業(yè)技術(shù)推廣服務(wù)中心,以“防汛降漬、追肥促長(zhǎng)、分類扶正、防控病蟲”為重點(diǎn),提出玉米應(yīng)對(duì)臺(tái)風(fēng)影響及災(zāi)后恢復(fù)生產(chǎn)技術(shù)意見。

  【農(nóng)機(jī)網(wǎng) 熱點(diǎn)關(guān)注】 目前,我國(guó)黃淮海夏玉米多處于大喇叭口期前后、東北春玉米多處于抽雄吐絲期前后,是防倒伏、促授粉、保結(jié)實(shí)的關(guān)鍵時(shí)期。據(jù)中央氣象臺(tái)預(yù)報(bào),8月將有3—4個(gè)臺(tái)風(fēng)生成,并有1—2個(gè)可能登陸我國(guó)。針對(duì)臺(tái)風(fēng)對(duì)玉米生產(chǎn)可能造成的不利影響和潛在風(fēng)險(xiǎn),農(nóng)業(yè)農(nóng)村部玉米專家指導(dǎo)組會(huì)同全國(guó)農(nóng)業(yè)技術(shù)推廣服務(wù)中心,以“防汛降漬、追肥促長(zhǎng)、分類扶正、防控病蟲”為重點(diǎn),提出玉米應(yīng)對(duì)臺(tái)風(fēng)影響及災(zāi)后恢復(fù)生產(chǎn)技術(shù)意見。
 
  疏通溝渠  防汛降漬
 
  在臺(tái)風(fēng)、暴雨來(lái)臨前開好排水溝,梯次漸深配套,保持溝渠通暢。低洼地塊提前深挖溝渠、提高排水能力,備足水泵等裝備、隨時(shí)疏浚排水。雨后及時(shí)查田,積水地塊加快清淤除障、架設(shè)水泵強(qiáng)排,減少植株水淹時(shí)間。有條件的地塊可在雨后晴好天氣中耕作業(yè),破除板結(jié)、疏松土壤,增強(qiáng)土壤透氣性。
 
  適時(shí)追肥  促進(jìn)生長(zhǎng)
 
  大喇叭口至抽雄吐絲期正是玉米養(yǎng)分需求高峰期,雨后養(yǎng)分容易流失,一般畝施用尿素10—15公斤,使用緩釋肥作底肥的追施尿素10公斤左右,強(qiáng)降雨影響較重地塊適當(dāng)增加追肥量,盡快保證養(yǎng)分供應(yīng)促進(jìn)生長(zhǎng)。適時(shí)開展一噴多促作業(yè),一次或多次噴施磷酸二氫鉀、蕓苔素內(nèi)酯等植物生長(zhǎng)調(diào)節(jié)劑和葉面肥,并根據(jù)病蟲發(fā)生情況配施殺蟲殺菌劑,提高群體災(zāi)后恢復(fù)生長(zhǎng)能力。一般在上午10點(diǎn)前或下午4點(diǎn)后作業(yè),也可夜間作業(yè)。
 
  分類扶正  促進(jìn)結(jié)實(shí)
 
  對(duì)雨后倒伏的玉米田,視情況分類扶正。尚未抽雄的地塊,對(duì)根倒、莖稈傾斜植株不需扶正,依靠植株自我調(diào)節(jié);對(duì)莖折植株盡量清理離田,增加群體通風(fēng)透光。已經(jīng)抽雄授粉的地塊,對(duì)根倒、莖倒且莖稈與地面超過(guò)45度角的玉米植株一般不扶正,避免二次傷害;對(duì)倒伏平鋪的盡快扶正,可將相鄰4—6株綁在一起;對(duì)根系再次生長(zhǎng)扎地的采取墊扶措施,使玉米果穗離開地面。莖折嚴(yán)重的受災(zāi)地塊視情況改作青貯收獲,減少損失。對(duì)處在玉米散粉高峰期受暴雨影響的,可在雨后晴好天氣時(shí)開展無(wú)人機(jī)輔助授粉,飛行高度距冠層3米左右。
 
  防控病蟲  減少損失
 
  臺(tái)風(fēng)過(guò)境后,密切監(jiān)測(cè)分析病蟲害發(fā)生情況。黃淮海地區(qū)重點(diǎn)關(guān)注南方銹病、褐斑病、棉鈴蟲、桃蛀螟、玉米螟等病蟲害,東北地區(qū)重點(diǎn)關(guān)注大斑病、灰斑病、北方炭疽病、玉米螟、黏蟲等病蟲害,做好統(tǒng)防統(tǒng)治。選用適當(dāng)藥劑防治葉斑類病害和穗期病蟲害。
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