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2023年馬鈴薯春季田管技術意見

2023-02-09 13:35:58 來源:湖北省農業農村廳 閱讀量:20806 評論

  【農機網 熱點關注】當前,隨著氣溫逐漸回升,冬春種馬鈴薯即將破土出苗,抓好馬鈴薯春季田管至關重要,據氣象部門預報,未來一段時期可能經歷較強降溫過程,雨水偏多,為有效應對災害風險奪取馬鈴薯豐收,特制定如下技術指導意見。
 
  一、確保出苗整齊。露地馬鈴薯出苗前如土面板結,應進行松土,以利出苗。地膜覆蓋栽培的馬鈴薯要及時破膜引苗,并用細土封住膜孔,以利于提升地溫和防止燒苗;高山區域還沒有完成播種工作的要力爭在3月1日前完成,以利出苗整齊形成高產壯苗,為馬鈴薯豐產奠定基礎。
 
  二、搶晴開溝防漬害。馬鈴薯忌澇,春季雨水較多,容易引起漬害。要搶晴清溝理墑,疏通排灌水系,尤其地下水位高的田塊應開深溝,同時注意疏通大田溝渠,確保田間不漬水。
 
  三、早施提苗結薯肥。根據出苗長勢,露地馬鈴薯,齊苗(田間出苗80%)時應追施一次速效提苗肥,畝施尿素5-6公斤加硫酸鉀5-8公斤兌水條施;在現蕾期施第一次結薯肥,畝用三元復合肥10-15公斤施于植株周圍,如果長勢較弱,苗子老殘,天旱少雨,則應適當增加追肥量。應注意追施化肥時不能沾到葉片和直接接觸到根部,防止傷苗。地膜馬鈴薯,一般于苗期畝用磷酸二氫鉀200克兌水60公斤噴施葉面1-2次。若底肥施用較多,苗勢較好,則不應追肥;若有徒長現象,現蕾前,可每畝用250克/升甲哌鎓水劑20毫升兌水20公斤均勻噴施葉面,抑制徒長,促進結薯。
 
  四、及時中耕培高壟。馬鈴薯培土可使植株埋入土下節數增多,增加匍匐莖的數量,形成更多和更大的塊莖,并防止塊莖見光致薯皮發青。在苗期株高10-15厘米左右時,結合中耕除草進行第一次培土,做到鋤通壟背、除盡雜草、不傷根苗;在苗高25厘米左右時,進行第二次中耕培土,培土5-7厘米;在開花前進行第三次中耕鋤草,高培土,以利于結薯。
 
  五、防止低溫凍害。在霜凍來臨前用草木灰撒施葉面或用稻草、雜草、搭建小拱棚進行覆蓋防霜,待冷空氣或晚霜過后及時揭除;霜凍后及時清除凍死的地上植株、老葉和死葉,噴施70%甲基托布津800-1000倍或75%百菌清600-800倍藥液防止發病,在植株發出新莖新葉后,每畝用磷酸二氫鉀200克兌水60公斤噴施葉面1-2次,促進植株生長。
 
  六、注意病蟲害防治。有晚疫病預測預報條件地區,按照預警提示及時做好晚疫病防控;無預測預報條件,于封壟期采用代森錳鋅、丙森鋅等藥劑噴施預防晚疫病,若發現中心病株及時噴施克露、增威贏綠、氰霜唑、銀法利等治療性藥劑1-2次。結合晚疫病防治噴施1-2次吡蟲啉防治蚜蟲。
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