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居民家中曇花4個月開了3次曇花的生活環(huán)境

  • 生活
  • 2023-04-17 14:05
  居民家中曇花4個月開了3次是非常罕見的事。曇花一般在6月底至9月***,大多數(shù)一年只***一次。曇花:附生肉質(zhì)灌木,高2~6米,老莖圓柱狀,木質(zhì)化。分枝多數(shù),葉狀側(cè)扁,披針形至長圓狀披針形,邊緣波狀或具深圓齒,基部急尖、短漸尖或漸狹成柄狀,深綠色,無毛,中肋粗大,老株分枝產(chǎn)生氣根。

  曇花是附生肉質(zhì)灌木植物,高2~6米,老莖圓柱狀,木質(zhì)化。分枝多數(shù),葉狀側(cè)扁,披針形至長圓狀披針形,長15~100厘米,寬5~12厘米,先端長漸尖至急尖,或圓形,邊緣波狀或具深圓齒,基部急尖、短漸尖或漸狹成柄狀,深綠色,無毛,中肋粗大,寬2~6毫米,于兩面突起,老株分枝產(chǎn)生氣根;小窠排列于齒間凹陷處,小形,無刺,初具少數(shù)綿毛,后***。

  生長環(huán)境

  生長地海拔1000~1200米。模式標本采自墨西哥。曇花原產(chǎn)美洲墨西哥至巴西的熱帶沙漠中。那里的氣候又干又熱,但到晚上就涼快多了。晚上開花,可以避開強烈的陽光曝曬;縮短開花時間,又可以大大減少水分的損失,有利于它的生存。使它生命得到延續(xù)。于是天長日久,曇花在夜間短時間開花的特性就逐漸形成,代代相傳。

  生長習性

  喜溫暖濕潤的半陰、溫暖和潮濕的環(huán)境,不耐霜凍,忌強光暴曬。特別是對溫度的要求比原產(chǎn)地高,為15~25℃,春夏季夜溫需16~18℃,白天21~24℃。越冬溫度在10~12℃,土壤不宜過干。冬季可耐5℃左右低溫。土壤要求宜用富含腐殖質(zhì)、排水性能好、疏松肥沃的微酸性沙質(zhì)土,否則易漚根。

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