Korean Journal of Environment and Ecology (한국환경생태학회지)

Korean Society of Environment and Ecology (한국환경생태학회)
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A study on the Distribution, External Morphological Characteristics and Soil Condition of Exochorda serratifolia S.Moore

희귀식물 가침박달(Exochorda serratifolia S.Moore)의 분포, 외부형태학적 형질 및 토양특성에 관한 연구

  • Received : 2016.04.28
  • Accepted : 2016.12.24
  • Published : 2016.12.30
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Abstract

This study reviewed the external morphological characteristics of a rare species, Exochorda serratifolia S.Moore, in South Korea through a comparison of its previous records. Also, a distribution map of this species was made using previous data on flora and voucher specimens. Furthermore, the soil characteristics of Exochorda serratifolia S.Moore was analysed in order to determine the correlation between external morphological features and soil characteristics. At the study sites, soil organic matter, total nitrogen, available phosphates, exchangeable potassium, exchangeable calcium, exchangeable magnesium, cation exchange capacity and soil pH were found to be in the ranges of 3.25-29.83%, 0.15-1.14%, 3.0-156 mg/kg, $0.39-1.49cmol^+/kg$, $2.48-38.07cmol^+/kg$, $0.77-18.29cmol^+/kg$, $7.3-23.0cmol^+/kg$ and 4.6-7.1 respectively. The soil condition surrounding the population of Exochorda serratifolia S.Moore in Mt. Ap-san (Daegu) was found to have higher percentages of organic matter, total nitrogen, and cation exchange capacity than the soil condition of other populations. Moreover, the length of inflorescence and the number of flowers in this population were significantly higher than the populations studied in other areas (P < 0.001). We also identified a significant correlation between genetic, geographic distance and several morphological characteristics. A comprehensive review of various data on Exochorda serratifolia S.Moore such as external morphological characteristics, genetic structure, growth conditions, vegetation properties, and environmental characteristics is required to understand its growth characteristics and conserve this rare species.

본 연구에서는 희귀수종인 가침박달의 외부형태학적 형질을 재검토하여 기존 문헌 및 선행 연구와의 차이를 파악하였으며, 식물상 문헌 및 표본정보를 통해 국내 분포도를 작성하였다. 또한 토양의 이화학적 특성을 분석하여 외부형태형질과 토양 조건과의 상관성을 고찰하였다. 가침박달 자생지 토양분석 결과, 유기물함량 3.25-29.83%, 전질소함량 0.15-1.14%, 유효인산 3.0-156mg/kg, 치환성 $K^+$ $0.39-1.49cmol^+/kg$, 치환성 $Ca^{2+}$ $2.48-38.07cmol^+/kg$, 치환성 $Mg^{2+}$ $0.77-18.29cmol^+/kg$, 양이온치환용량 $7.3-23.0cmol^+/kg$으로 확인되었으며, 토양 pH는 4.6-7.1인 것으로 조사되었다. 대구 앞산 집단의 경우, 유기물함량, 전질소, 양이온치환용량이 가장 높았고, 화서의 길이가 길고, 꽃의 수가 많아 다른 지역에 비해 유의성 있게 차이를 나타냈다(P < 0.001). 또한, 집단의 유전적거리와 지리적 거리, 일부 외부형태형질의 차이를 통해 이들의 상관성을 확인할 수 있었다. 희귀 수종인 가침박달의 생육특성을 파악하고, 서식지 내 보존을 위해 외부형태형질, 유전적 구조, 생육상태, 식생구조, 환경특성 등 다양한 데이터의 종합적 고찰이 필요하다.

Keywords

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