クロマツのさし木発根性に及ぼす摘葉・摘芽の影響  [in Japanese] Effects of Defoliation and Disbudding on Rooting Ability of Japanese Black Pine Cuttings  [in Japanese]

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Abstract

クロマツのさし木による効率的な生産システムを確立するため, さし穂の調整手法の最適条件を検討した。1年生実生苗の主軸をさし穂とし,摘葉•摘芽め強度および切口の処理を変えてさし木を行った。その結果,1)針葉が54%以上あれば発根率54~62%を示したが,過度な摘葉によって発根率は低下した。また,針葉が54%の処理区で最も根系が発達した。2)冬芽を一部または全て除去したさし穂は,冬芽を残したものより発根率が高かった。3)切口は返し切りを行うことで発根率が高まる傾向にあるが,有意差はみられなかった。以上から,発根の最適条件は,針葉の半数除去•冬芽除去•返し切りを行うことであると推察される。ただし冬芽を除去したさし木苗は成長が悪いため,事業化にあたっては考慮する必要がある。

The objective of this study is establishment of vegetative propagation of Japanese black pine (Pinus thunbergii). We examined the effect of defoliation, disbudding and shape of basal cut on the rooting ability of cuttings, and we tried to find an optimal method of propagation. Cuttings were made from terminal shoots of 1-year-old seedlings. As a result, 1) When 0-46% of the needles of cuttings were removed, those rooting percentages were steady between 54 and 62%. However, when needles were removed excessively, rooting ability decreased notably. Moreover, 46% needle removal cuttings had the longest root systems. 2) In the case of cuttings with a part or all their buds removed, the rooting percentage was greater than that of control cuttings. 3) On the examination of treatments of the cut end, rooting ability was better for diagonal shape than for horizontal shapes, but difference in the effect was insignificant. So the optimal method is to remove half of the needles or buds from cuttings and to cut end in a diagonal shape. However, as growth of cuttings from which buds had been removed was bad, a careful needs to be paid to disbudding for commercial production.

Journal

  • JOURNAL OF THE JAPANESE FORESTRY SOCIETY

    JOURNAL OF THE JAPANESE FORESTRY SOCIETY 86(1), 37-40, 2004-02-16

    Japanese Forestry Society

References:  12

Cited by:  5

Codes

  • NII Article ID (NAID)
    110006279023
  • NII NACSIS-CAT ID (NCID)
    AN00198561
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    0021485X
  • NDL Article ID
    6856723
  • NDL Source Classification
    ZR21(科学技術--農林水産--林産)
  • NDL Call No.
    Z18-340
  • Data Source
    CJP  CJPref  NDL  NII-ELS  IR  J-STAGE 
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