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试验表明，日本木采用５ｃｍ长根段繁殖种苗最适宜，埋根基质以珍珠岩＋泥炭（１ｖ∶１ｖ）为最好，根段成苗率达８５％以上。
Experiments show that Japanese alder 5cm long root segments of the most suitable breeding seedlings, rooted substrate perlite + peat (1v: v) is the best rooted seedlings rate of 85% or more.