ツキノワグマによるヒノキの剥皮害と幹材腐朽・変色の関係 : 静岡県有林62年生ヒノキにおける事例  [in Japanese] The relationship between bark damage to Chamaecyparis obtusa by the Asiatic black bear, Ursus thibetanus, and resulting trunk rot and staining : A case study of a 62-year C. obtusa stand in Shizuoka prefectural forest  [in Japanese]

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Author(s)

    • 門脇 正史 KADOWAKI S.
    • 筑波大学農林技術センター井川演習林 Ikawa Forest, Agricultural and Forestry Research Center, University of Tsukuba
    • 遠藤 徹 ENDOH T.
    • 筑波大学農林技術センター井川演習林 Ikawa Forest, Agricultural and Forestry Research Center, University of Tsukuba
    • 滝浪 明 TAKINAMI A.
    • 筑波大学農林技術センター井川演習林 Ikawa Forest, Agricultural and Forestry Research Center, University of Tsukuba
    • 大坪 輝夫 OHTSUBO T.
    • 筑波大学農林技術センター井川演習林 Ikawa Forest, Agricultural and Forestry Research Center, University of Tsukuba
    • 井波 明宏 INAMI A
    • 筑波大学農林技術センター井川演習林 Ikawa Forest, Agricultural and Forestry Research Center, University of Tsukuba

Abstract

静岡市岩崎にある県営林62年生ヒノキ林分において1994年4月にツキノワグマによる樹皮の剥皮害(クマハギ害)と幹材の腐朽•変色の伸長を調査した。1994年2月に間伐されたヒノキのうちクマハギ害を受けた個体を任意に10本選定した。それらの平均樹高と平均根元直径は,15.4mと37.3cmであった。剥皮高(平均1.39m)に対する腐朽高(平均1.82m)•変色長(3.35m)の割合の平均はそれぞれ1.32,2.56であった。剥皮高と腐朽高の間には正の相関があったが,剥皮高と変色長の間には有意な相関はなかった。これより,クマハギ害が大きければ,幹材腐朽の伸長も増大することが示された。

Elongation of the area of trunk rot and staining of <I>Chamaecyparis obtusa</I>, from which bark had been peeled by the Asiatic black bear, <I>Ursus thibetanus</I>, were examined in a 62-year-old stand in Shizuoka prefectural forest at Iwasaki, Shizuoka, in April 1994. Ten damaged trees, which had already been cut for thinning in February 1994, were randomly sampled, and their measured mean tree heights and base diameters were 15.4 m and 37.3 cm, respectively. The mean ratios of rot height (mean =1.82 m) and stain length (mean=3.35 m) to the heights of peeled bark (mean =1.39 m) were 1.32 and 2.56, respectively. There was a significant positive correlation between the height of the peeled bark and rot height, but no significant correlation between the height of peeled bark and the stain length. This indicates that more severe damage by bears increases the length of trunk rot.

Journal

  • JOURNAL OF THE JAPANESE FORESTRY SOCIETY

    JOURNAL OF THE JAPANESE FORESTRY SOCIETY 81(4), 351-354, 1999-11-16

    Japanese Forestry Society

References:  10

Codes

  • NII Article ID (NAID)
    110002830938
  • NII NACSIS-CAT ID (NCID)
    AN00198561
  • Text Lang
    JPN
  • Article Type
    SHO
  • ISSN
    0021485X
  • NDL Article ID
    4939875
  • NDL Source Classification
    ZR21(科学技術--農林水産--林産)
  • NDL Call No.
    Z18-340
  • Data Source
    CJP  NDL  NII-ELS  J-STAGE  JASI 
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