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2010年冬天,我见燕子掌比较多,而暖房有限,便突发奇想,何不试试露台越冬?我有几盆燕子掌一直放在房檐下,盆土很干,几次小寒潮都安然无恙。2010年1月9日寒潮再袭之前(图1),我取一件旧夹衣轻轻盖上(图2),次日早上日出之后揭去,让其充分接受光照,试试它的抗寒性。有一天早上,根据当日预报,气温达-9℃,而燕子掌仍安然无恙(图3)。这是什么道理呢?我分析,原因有三:第一、盆土很干燥,降低了燕子掌树体的含水量,提高了细胞质浓度,降低了冰点。
In the winter of 2010, I saw a lot of swallows palms, while the limited number of greenhouses, they suddenly whim, why not try the patio overwintering? I have a few basins swallow palm has been placed under the eave, basin soil is very dry, several times the cold tide are safe and sound. Before the cold surge on January 9, 2010 (Figure 1), I took an old jacket lightly covered (Figure 2), the next morning after the sunrise to expose, let it fully accept the light, try it Cold resistance. One morning, according to the forecast of the day, the temperature reached -9 ℃, and the swallow palm was still safe and sound (Figure 3). This is what reason? My analysis, for three reasons: First, basin soil is very dry, reducing the water content of swallow palm tree, increasing the concentration of cytoplasm, reducing the freezing point.