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沙田柚开花前如何管理?

Miss Chen
2017-06-23
沙田柚开花前要及时做好肥水管理和病虫害的防治工作,以促壮树势,提高树体营养水平,促壮花蕾,提高花蕾的抗逆能力,减少病虫为害,保护花蕾,提高座果率,种地网整理了沙田柚开花前的施肥及病虫害防治,以下列举出来供网友们参考。

一、沙田柚开花前的施肥:
在花蕾出现前施花前肥,以有机肥和磷钾肥为主,五年生以上的结果树,每株施磷酸二氢钾0.5~1公斤、沤制腐熟的人畜禽粪15~20公斤,围绕树冠滴水线挖深15~20厘米、宽30~40厘米的环沟,将肥料充分搅拌均匀后,施于沟内,盖土即可。
如施肥后遇干旱天气,应及时淋施清水或沤制腐熟的粪水,每株50~60公斤,以促进肥料的溶解和转化。

二、沙田柚开花前的病虫防治:
沙田柚开花前重点防治红蜘蛛、炭疽病、蚧壳虫、溃疡病、花蕾蛆等病虫,可于花蕾刚刚露白时,花蕾黄豆粗大小时和花蕾即将开放时,各喷洒一次800倍灰霜特、3000倍扫螨净、1500倍蚧死净混合液、或800倍甲基托布津、800倍三氯杀螨醇、1000倍速扑杀混合液进行防治,以保护花蕾。

三、沙田柚的叶面追肥:
结合病虫防治,加入1000倍活力素、5000倍天然芸苔素、300倍磷酸二氢钾混合液同喷,既能强化防病治虫的效果,又能促壮花蕾,提高花蕾抵抗春季低温阴雨天气的能。
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