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  • 為什么提倡滴灌或膜下澆水

    2019-05-23 206

        JIAOSHUI,SHISHUCAIGUANLIZHONGZUIZHONGYAODEYIXIANGCUOSHI。DANSHI,SHENMESHIJIANJIAOSHUI、JIAODASHUIHUANSHIXIAOSHUI、BAITIANJIAOHUANSHIWANSHANGJIAODENGDENGJUTIXIJIE,SHIYOUSHUOFADE。ZAIWENDUHEDIQIUYINLIDEZUOYONGXIA,TURANGZHONGDESHUIFEN,SHIZHONGSHIYIGEDONGTAIBIANHUAGUOCHENG。

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    為什么提倡滴灌或膜下澆水

        ZHEJIUXUYAOZAIJIAOSHUIDESHIHOUJINLIANGBIMIANSHUIFENDEZHENGFA。JUTICUOSHIYOULIANGGE,YIGESHIKANTIANJIAOSHUI,QIEBUYAOZAIXIAWUJIAOSHUI。QINGTIANDESHANGWUJIAOSHUI,PENGSHINEIJIAOGAODEQIWENHUISHITURANGSHUIFENDEZHENGFASUDUGENGKUAI,ZAIJIEZHUFANGFENGGUANLI,KEYIJISHIBASHUIFENPAICHUPENGWAI,WANSHANGDEKONGQISHIDUYEJIUBUHUIHENGAO。RANERZHEYOUHEDANGSHIJIAODESHUILIANGDAXIAOHEWENDUSHUIPINGYOUGUAN,XUYAOZAIZHEFANGMIANCAIQUCUOSHIJINXINGBAKONG。

        第二項措施,澆小水并膜下澆水或滴灌。一次性澆大水,蒸發到空氣中的水分就更多,尤其在棚室內氣溫不高的情況下,水分蒸騰慢需要的時間長,就難免導致晚上有較多的水滴凝聚在蔬菜器官上。因此,生產中,要求冬季給大棚蔬菜澆水時,第一要澆小水或滴灌,第二膜下澆水。這樣不但限制了水分蒸發到空氣中的比例,澆到大棚膜下的水,也難以蒸發到空氣中,也就可以更好地控制棚室空氣的濕度,病害的發生幾率會大大降低。


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