2024年7月18日 星期一 19:43:55

地瓜后期管理的科学管理技术

    地瓜从8月下旬到收获的这段时间为生长后期,其主要管理措施是:
  叶面喷肥 适合地瓜喷施的叶面肥种类很多,常用的有1%~2%尿素溶液、2%~3%过磷酸钙浸出液、5%~10%草木灰浸出液、0.3%磷酸二氢钾溶液等;喷施时间,一天之中以下午5时左右为好,一般每亩喷洒75~100千克,隔5~7天再喷一次,连喷2~3次。
  防止涝害 地瓜不耐涝,土壤含水量超过田间最大持水量的90%时,即不能正常生长;一旦遭受涝害,对产量影响很大,甚至引起瓜块腐烂。因此,大雨过后,要立即排除田间积水,必要时进行叶面喷肥,以补充植株营养,并冲去残留在植株表面上的淤泥,促进光合作用。
  及时防治 食叶害虫 地瓜生长后期易发生地瓜麦蛾、旋花天蛾、斜纹夜蛾等食叶害虫,可在幼虫低龄期及时用菊酯类农药2000倍液或2000单位Bt250毫升/亩进行喷雾防治。
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