大棚西瓜管理内容摘要:
2、适当通风,不断加大通风量及更换通风口,覆盖物要早揭晚盖,尽量延长光照时间。 三、13 片真叶期此期内叶芽和花芽同时进行分化,要适当控制地上部分和生长,以促进根系生长发育。 管理要早揭盖晚盖物,延长见光时间,加大通风量和通风时间,白天控制在 2025,以利雌花分化。 若中午苗床内大部分幼苗出现轻微萎蔫症状时,可选择晴暖天气上午 10 点左右,向畦面洒浇 1 次 3035的温水,第 2天畦面撒 1 层细沙土保墒。 四、定植前炼苗一般从定植前 45 天开始,逐步减少大棚内小拱棚上的覆盖物和进一步加大白天的通风时间和通风量,使苗床温度逐步降低到大棚内温度,增强对大棚内环境的适应能力。 定植前 34 天,苗床内浇 1 次小水,防止散壤,以利定植。 专利查询。大棚西瓜管理
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