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细绿萍原产热带地区,露天不能抵御北方严寒,要在一定的保护条件下才能渡过漫长的冬天。一、挖筑半地下式塑料棚日光温室利用本地自然沟渠,挖一个60米~2的半地下式土水池,修成南低北高倾斜向阳的坡面,池内放水50～80厘米深,水池上面用木棍竹杆搭成棚架,覆盖两层塑料薄膜,用草绳压之以防吹掀,然后再盖以草帘保温即成。二、保种池内温度主要是利用日光能,每天早上9点把草帘揭
Fine Green Ping origin tropical areas, the open air can not withstand the cold in the north, to a certain degree of protection conditions to cross the long winter. First, digging semi-subterranean plastic shed solar greenhouse use of local natural ditches, dig a semi-underground 60m ~ 2 underground soil pool, built into a low slope south to north slope, the pool water 50 to 80 cm deep, above the pool Bamboo poles with a wooden scaffolding, covered with two plastic film, with the pressure of grass rope to prevent blowing lift, and then covered with straw curtain insulation Serve. Second, the temperature of the seed pool is mainly the use of solar energy, grass curtain 9:00 every morning to expose