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Effects of Soil Moisture Condition and Shading on Growth of Invasive Plant Burcucumber (Sicyos angulatus L.)

토양 수분과 차광이 외래식물 가시박의 생육에 미치는 영향

  • Oh, Dagyeom (Department of Agronomy, Gyeongsang National University) ;
  • Shim, Doobo (Department of Agronomy, Gyeongsang National University) ;
  • Song, Sonhwa (Department of Agronomy, Gyeongsang National University) ;
  • Oh, Jihyun (Department of Agronomy, Gyeongsang National University) ;
  • Hong, Sunhee (Department of Environmental Science and Ecological Engineering, Korea University) ;
  • Shim, Sangin (Department of Agronomy, Gyeongsang National University)
  • 오다겸 (국립경상대학교 농업생명과학대학 농학과) ;
  • 심두보 (국립경상대학교 농업생명과학대학 농학과) ;
  • 송선화 (국립경상대학교 농업생명과학대학 농학과) ;
  • 오지현 (국립경상대학교 농업생명과학대학 농학과) ;
  • 홍선희 (고려대학교 환경생태공학부) ;
  • 심상인 (국립경상대학교 농업생명과학대학 농학과)
  • Received : 2015.09.12
  • Accepted : 2015.12.08
  • Published : 2015.12.30

Abstract

Burcucumber (Sicyos angulatus) is an annual invasive plant species originated from North America. This species grows by twining around tree trunks, and blocks other plants from photosynthesis. Thus, it has caused the destruction of the ecosystem and biological diversity by threatening native plants. This study was performed to find out the effect of different soil water content (20%, 13%, 10%, 3%) and various shading degrees (0%, 60%, 80%) on the growth and photosynthesis-related activity of burcucumber. In the responses of burcucumber to soil water content, plant height (PH), leaf length (LL), leaf width (LW) and photosynthetic efficiency (PE) were lower at 20% water content than 10% reflecting that burcucumber plant grow well in the less dry soil and shows poor growth under wet soil condition. In shading experiment, PH, LL, LW and PE were lower at 80% than 60% shading and in general, the growth characteristics were lowered as the shading intensity increased. The improved growth of burcucumber under highly or moderately shaded condition implies that the plant can grow well without growth retardation and can be adapted to shading condition with other tall plant species including tree. Further study on the combination effects of above factors should be conducted in future for effective ecological control of burcucumber.

본 연구는 생태교란식물 가시박의 효과적인 관리를 위해 필요한 생태적 방제법 수립을 위한 기초정보를 얻기 위하여 토양수분함량, 차광 정도가 다른 조건 하에서 가시박의 생육을 조사하였다. 토양수분에 따른 생육조사 결과, 30 DAP에 토양수분 10% 조건이 20% 조건에 비하여 초장이 2.3배, 엽장이 1.2배, 엽폭이 1.1배로 증가하는 것으로 나타났다. 토양수분 20% 조건에서 지상부, 지하부 건물중은 10% 조건에 비하여 2.2배, 1.7배 낮은 값을 나타내어 가시박 생장은 토양수분 20% 이상에서 억제되는 것으로 나타났다. 정식 30일 후에 차광 정도별 가시박의 생육은 60% 차광조건이 무차광 조건에 비하여 초장은 3.0배, 엽장이 1.3배, 엽폭이 1.4배로 큰 값을 나타냈다. 80% 차광 조건에서 지상부, 지하부 건물중은 60% 차광 조건에 비하여 2.3배, 2.8배 낮은 값을 나타냈다. 80% 차광 조건은 60% 차광 조건과 비교하였을 때에 건물중이 낮게 나타났으며 식물체가 연약하게 자란 것으로 보아 80% 차광 이상의 조건이 가시박 생장 억제에 효과적인 것으로 확인되었다.

Keywords

References

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