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齊齊哈爾開展中耕深松技術指導
2024-07-04
08:46:36
來源:黑龍江省齊齊哈爾市農業技術推廣中心 閱讀量:10293
評論
【農機網 地方農機】 近期,黑龍江省齊齊哈爾市受持續降雨、低溫寡照的氣候影響,大豆平均株高照常年同期矮5公分左右,玉米平均株高照常年同期矮10公分左右。針對這一情況,市農業農村局第一時間組織市農業技術推廣人員,深入田間地頭指導田間管理工作,采取中耕深松來提高低溫抗旱防澇帶來的影響。
農業技術專家建議:中耕深松各行距要一致,偏差≤1cm。鋤齒深度要達到規定要求,其深度誤差≤1cm,溝底要平,地表土壤松碎,壟溝要有5cm的座犁土。中耕時不傷苗、不埋苗,埋苗率≤1%,傷苗率≤3%,地頭保苗率不低于90%。
1.第一遍中耕(深松放寒)a) 大豆、玉米第一遍中耕應盡早開展,在能確定苗眼位置時,進行壟溝或行間深松作業為宜,也可以在出苗前進行盲松,第一遍深松放寒作業宜早不宜遲。注:第一遍中耕深松可根據田間的實際情況,壟溝可采用單桿尺或多桿尺進行深松。工作深度要前淺后深,前桿尺入土深度18cm~20cm,后桿尺入土深度≥30cm,同排桿尺入土深淺一致,誤差±1cm。
2.第二遍中耕(淺培土)a) 一般提倡 2 遍~3 遍中耕作業。大豆第二遍中耕在分枝期進行扶壟培土,覆土深度 3cm~4cm,溝里要留有 5cm 的座犁土。b) 玉米在 2 片~3 片展葉進行第二遍中耕培土、除草。
中耕機可視條件決定是否配帶覆土鏵,覆土深度 3cm~4cm,壟溝里要留有 5cm 的座犁土。
3.第三遍中耕(追肥培土)a) 大豆第三遍中耕在花期進行,務必在封壟前結束,以防過晚傷根,造成傷苗、大豆損葉落花。b) 玉米在 5~6 展葉期結合追肥進行第三遍中耕,施肥在苗側 15cm~20cm,深度 10cm~12cm,壟臺要有碰頭土,地表不漏肥。
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