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【實用技術(shù)】當前大豆田間管理重點

2024-07-04 09:16:34 來源：內(nèi)蒙古自治區(qū)農(nóng)牧廳 閱讀量：17620 評論

導(dǎo)讀：由于大豆主產(chǎn)區(qū)受出苗后持續(xù)低溫、陰雨寡照雙重影響，植株生長整體偏慢，部分地塊植株弱小，不同程度發(fā)生根腐病。

　　【農(nóng)機網(wǎng) 科技創(chuàng)新】由于大豆主產(chǎn)區(qū)受出苗后持續(xù)低溫、陰雨寡照雙重影響，植株生長整體偏慢，部分地塊植株弱小，不同程度發(fā)生根腐病。為促進大豆植株快速恢復(fù)生長，防止病害進一步加重和蔓延，建議廣大種植戶及時查田，盡快采取有效田管措施。
 
　　一是及時進行中耕作業(yè)。低洼易澇地塊及時進行鏟趟、中耕培土作業(yè)，加快散寒、散墑，增加土壤透氣性，促進幼苗恢復(fù)生長。
 
　　二是適時噴施生長調(diào)節(jié)劑和葉面肥。莖葉除草后緩苗地塊適時噴施生長調(diào)節(jié)劑和葉面肥，幫助快速緩苗，促弱轉(zhuǎn)壯。生長調(diào)節(jié)劑可選用蕓苔素內(nèi)酯或赤·吲乙·蕓苔(碧護)，葉面肥用磷酸二氫鉀，稀釋后葉面噴施。
 
　　三是提前噴施殺菌劑和葉面肥。長勢較弱地塊要搶抓晴好天氣，及時噴施殺菌劑和葉面肥，增強植株抗病性，降低病害發(fā)生幾率。
 
　　四是及時采用藥劑防治。根腐病發(fā)生地塊及時開展藥劑防治，可選用精甲霜靈、精甲霜靈·咯菌腈、吡唑醚菌酯等藥劑兌水稀釋后土壤穴施防治。也可用甲霜·惡霉靈稀釋后噴霧或澆灌，噴霧盡可能將藥液噴施到莖基部，每7-10天施藥一次，連續(xù)防治2-3次(由于根腐病發(fā)生在根部，無論選擇哪種配方，都要保證藥水量充足)。

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