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銀杏樹的介紹和特點 銀杏樹的介紹是和特點

  • 生活
  • 2023-04-19 18:25
銀杏樹是銀杏科、銀杏屬植物,高可長到40米左右,銀杏為速生珍貴的用材樹種,是中生代孑遺的稀有樹種,系中國特產。銀杏樹的特點是適應能力強、栽培范圍廣、病蟲害少。其葉子為扇形,有長柄,在生長階段葉片呈淡綠色,不過每年秋季落葉之前葉色會變為黃色,有較高的觀賞價值,種子具長梗,下垂,常為橢圓形、長倒卵形、卵圓形或近圓球形。

  銀杏生于海拔500-1000米、酸性(pH值5-5.5)黃壤、排水良好地帶的天然林中,常與柳杉、榧樹、藍果樹等針闊葉樹種混生,生長旺盛。銀杏為喜光樹種,深根性,對氣候、土壤的適應性較寬,能在高溫多雨及雨量稀少、冬季寒冷的地區生長,但生長緩慢或不良。

  銀杏樹的初期生長較為漫長,并且萌蘗性更強。銀杏樹分為雌雄株,雄株不結果,而雌株一般要在生長到20年以后才開始結實。銀杏樹一般在3-4月開始萌動展葉,4-5月開花,并在9-10月份種子成熟,10月以后開始落葉。栽培區常用實生苗、移桿苗或根蘗苗進行嫁接,可提前在8-10年生時開花結實。

  銀杏可采用播種育苗、硬枝扦插、蘗芽分株等***進行有性和無性繁殖。銀杏雌雄異株,為了獲得種子,也可在雌株的枝條上用芽接的***進行嫁接,這樣可使植株提前開花結果,而大量繁殖幼苗。

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