• Title/Summary/Keyword: P.theunbergii

Search Result 2, Processing Time 0.019 seconds

The Monoterpenoids in Pinus tyhunbergii, Pinus rigida and Pinus densiflora (곰솔, 리기다소나무 및 소나무의 Monoterpenoids)

  • 강호남;김종희
    • The Korean Journal of Ecology
    • /
    • v.20 no.5
    • /
    • pp.323-328
    • /
    • 1997
  • The monoterpenoids are analysed in leaves and fallen leaves of Pinus species (P. thunbergii, P.. rigida. P. densiflora.). The amount of total monoterpenoids of P. thunbergii was always the highest, and then those of P. rigida and P. densiflora were orderly decreasing (P<0.05). The major monoterpenoids of P. thunbergii, P. rigida and P. densiflora are ${\beta}-pinene$, comphene and sabinene. There was no significant difference among the seasonal variation in monoterpenoids composition (P>0.05), but the concentrations of fenchone and bornyl acetate were varied (P<0.05).

  • PDF

Habitat Characteristic and Community Structures of Humulus japonicus in Korea's Middle region (한국 중부지방의 환삼덩굴 군락구조와 서식지 특성)

  • Oh, Young-Ju;Yoo, Ji-Hyock;Moon, Byoung-Chul;Sohn, Soo-In;Oh, Se-Mun;Kim, Seok-Cheol
    • Korean Journal of Environmental Agriculture
    • /
    • v.27 no.1
    • /
    • pp.72-79
    • /
    • 2008
  • Phytosociological study was carried out to investigate the structural characteristics of Humulus japonicus community in the Middle area of Korea. The vegetation data of total 67 $relev\acute{e}s$ were analyzed by the $Z\ddot{u}rich$-Montpellier school's method. Upper layer plant communities of Humulus japonicus were classified into four community groups : Humulus japonicus-Artemisia princeps community, Chenopodium album community, Setaria viridis-Echinochloa crus-galli community and Typical community. Lower layer plant communities were classified into five community groups : Galium spurium-Stellaria aquatica community, Equisetum arvense community, Persicaria theunbergii community, Echinochloa crus-galli-Digitaria ciliaris community and Typical community. According to the results of canonical correspondence analysis by vegetation and environmental factor, Setaria viridis-Echinochloa crus-galli community of upper layer was distributed throughout the soil with high relative light and soil hardness. Chenopodium album community appeared in the soil with high pH. Galium spurium-Stellaria aquatica community of lower layer was formed in the high soil pH. Persicaria theunbergii community and Echinochloa crus-galli-Digitaria ciliaris community were distributed in the soil with high moisture.