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雨后大棚怎么管

发布时间:2024-04-11 浏览量: 字号:

近期,由于雨水天气增多,对棚内蔬菜的生长造成了较大影响,尤其是天气骤晴后,很多菜农因管理不当,造成蔬菜萎蔫、闪苗等问题。在此,提醒广大菜农朋友注意做好连阴天、雨天的管理。

缓慢见光,避免闪苗 连阴后骤晴时,可采用每隔1~3个草苫揭开1个的方法,使蔬菜逐步见光,避免秧苗打蔫闪苗。如此反复数次或数天,揭苫数量由少到多,至蔬菜生长正常为止。

使用卷帘机的棚户不要一下将草苫全部拉开,先少量卷起,随后逐渐加量。进入正常管理后,在温度允许情况下尽量早揭和晚盖草苫,揭草苫时间应以揭开草苫后棚内温度不明显下降为宜,盖草苫时间应根据季节和室内温度而定,应在棚内温度降至17℃时盖草苫为宜。

遭受冻害要及时补救 剪除枯枝,人工喷水,以低温度、少光照为主进行管理,逐步增加光照和提高棚内温度。对长势较弱或结果较多的植株,及时采收,并适量疏花疏果,以减少营养消耗。同时叶面喷肥,补充营养,一般叶面可喷施0.3%磷酸二氢钾加0.3%硝酸钙、1%的葡萄糖液。

强化控湿防病 持续低温降雨天气,棚内空气湿度大,易诱发病害,应在中午短时间通风排湿,控制病害发生,特别注意室内温度在15℃~25℃时,保证空气相对湿度在90%以下,以避免病原菌快速侵染发病,发病时可选用烟剂、粉尘剂防治。

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