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紅豆杉怕凍不怕凍 紅豆杉怕凍嗎

  • 生活
  • 2023-04-19 18:22
紅豆杉不怕凍。紅豆杉喜涼爽濕潤氣候,可耐零下30℃以下的低溫,抗寒性強。紅豆杉適宜種植在土質疏松、透氣性好、排水性好的砂質土壤中,種植前需要在土壤中加入適量的基肥,保持土壤的肥沃性,有利于植株生長發育。

  紅豆杉雌雄異株、異花授粉、植株間隔,導致授精受阻、種子數量減少。種子當年成熟,假種皮厚,自然條件下需兩冬一夏才能萌芽。雖然偶有天然更新苗,但大多數種子休眠期內己腐爛或干燥失水失去活力。

  紅豆杉幼苗長勢慢、抗逆性差、成活率低,決定了野生紅豆杉資源分散性、有限性及發展難度,這也是紅豆杉稀有瀕危的客觀原因所在。

  紅豆杉生長較慢,據測定,樹齡100年以上的紅豆,胸徑40厘米左右。人工栽培能顯著提高生長速度,廣西臨桂海拔560米的低山造林,造林成活率100%,3年平均高91.6厘米、平均地徑1.45厘米,年平均高長量約為高30.5厘米。

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