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馬尾松

馬尾松
馬尾松(學(xué)名:Pinus massoniana Lamb.)是松科,松屬喬木,,高可達45米,胸徑1.5米;樹(shù)皮紅褐色,枝平展或斜展,樹(shù)冠寬塔形或傘形,枝條每年生長(cháng)一輪(廣東兩輪),冬芽卵狀圓柱形或圓柱形,針葉,細柔,微扭曲,兩面有氣孔線(xiàn),邊緣有細鋸齒;葉鞘宿存。雄球花淡紅褐色,圓柱形,聚生于新枝下部苞腋,穗狀,雌球聚生于新枝近頂端,淡紫紅色,種子長(cháng)卵圓形,4-5月開(kāi)花,球果第二年10-12月成熟。 馬尾松分布廣,北自河南及山東南部,南至兩廣、湖南(慈利縣)、臺灣,東自沿海,西至四川中部及貴州,遍布于華中華南各地。一般在長(cháng)江下游海拔600-700m以下,中游約1200m以上,上游約1500m以下均有分布。是中國南部主要材用樹(shù)種。經(jīng)濟價(jià)值高。 馬尾松不耐腐。心邊材區別不明顯,淡黃褐色,長(cháng)縱裂,長(cháng)片狀剝落;木材紋理直,結構粗;含樹(shù)脂,耐水濕。比重0.39-0.49,有彈性,富樹(shù)脂,耐腐力弱。是重要的用材樹(shù)種,也是荒山造林的先鋒樹(shù)種。其經(jīng)濟價(jià)值高,用途廣,松木是工農業(yè)生產(chǎn)上的重要用材,主要供建筑、枕木、礦柱、制板、包裝箱、家具及木纖維工業(yè)(人造絲漿及造紙)原料等用。樹(shù)干可割取松脂,為醫藥、化工原料。根部樹(shù)脂含量豐富;樹(shù)干及根部可培養茯苓、蕈類(lèi),供中藥及食用,樹(shù)皮可提取栲膠。為長(cháng)江流域以南重要的荒山造林樹(shù)種。

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