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kangmierte
4 小时
蔬菜应对寒潮生产技术指导意见
(二)强化水肥管理。寒潮来临前,可叶面喷施芸苔素内酯、海藻酸等植物生长调节剂,或喷施0.3%磷酸二氢钾溶液2—3次,适度增施镁、锌、硼等中、微量元素肥料,提高植株抗性。降温期间不宜浇水,避免地温降低加重冷害,确需浇水的做到“三浇三不浇”,即晴天浇,阴天不浇;午前浇,午后不浇;浇小水,不浇大水。雨雪易导致光照不足,要及时整植吊蔓,减少植株间遮挡,适时通风增加棚膜透光性,或在温室北墙张挂反光膜,增加光 ...
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