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Evaluation of optimal planting combination considering growth characteristics of major landscaping groundcover plants

조경용 주요 지피식물의 생장 특성을 고려한 식재조합 및 혼식 적합성 평가

  • Han, Seung Won (Urban Agricultural Research Division, National Institute of Horticultural and Herbal Science, Rural Development Administration) ;
  • Jang, Ha Kyung (Urban Agricultural Research Division, National Institute of Horticultural and Herbal Science, Rural Development Administration)
  • 한승원 (농촌진흥청 국립원예특작과학원 도시농업과) ;
  • 장하경 (농촌진흥청 국립원예특작과학원 도시농업과)
  • Received : 2020.03.06
  • Accepted : 2020.03.19
  • Published : 2020.03.31

Abstract

With the purpose of designing companion planting of groundcover plants for ornamental uses, this study identified the yearly growth characteristics of nine species of different life forms, analyzed the coverage characteristics of individual plants, and suggested combinations of plants suitable for each life form. Polygonatum odoratum var. pluriflorum, Liriope platyphylla and Hosta capitata, as short-grained plants that can grow to more than 20 cm, tended to grow for 60 days after planting in April and maintain their shape thereafter. Their aerial parts started to wither and enter dormancy after September. Saxifraga stolonifera, Dianthus chinensis and Sedum middendorffianum tended to continuously grow until September after planting in April and their growth declined after September. Lysimachia nummularia, as a creeping plant that grows creeping on the ground, started to show a rapid growth three months after planting. Sedum sarmentosum grew slowly until August and the aerial parts started to wither from September when the temperature decreases. The coverage characteristics of these nine species that grow differently after companion planting were surveyed and the growth of Sedum sarmentosum showed the highest number of companions. It was found that Hosta capitata can be companion planted with Sedum middendorffianum, Saxifraga stolonifera, and Lysimachia nummularia. These results indicate that among different shoot growth types species propagated with their stems creeping on the ground or those that can grow vegetatively with non-rhizome parts are more suitable for companion planting with others than those of which rhizomes branch.

본 연구는 경관식재용 지피식물의 혼식 설계를 위하여 생활형이 다른 9종의 식물의 연중 생장 특성을 파악하고 식물들 간의 피복 특성을 분석하여 생활형에 따른 적정 식재조합을 도출하고자 본 연구를 실시하였다. 단립형으로 초장 20 cm 이상 생장하는 둥굴레, 맥문동, 일월비비추는 4월 식재 후 60일 이내 생육이 증가한 후 형태를 유지하였다가 9월 이후 지상부가 퇴화하며 휴면기에 들어가는 경향을 보였고, 분지형으로 20 cm 이하로 생장하는 바위취, 패랭이꽃, 애기기린초는 4월 식재 후 9월까지 지속적으로 생장하다가 9월 이후 생장이 감소하는 특성을 나타냈다. 포복형으로 지면에 붙어서 생장하는 리시마키아는 식재 후 3개월 경과부터 급속한 생장을 보였으며 돌나물은 8월까지 서서히 생장하다가 온도가 하강하는 9월부터 지상부가 퇴화하는 특성을 보였다. 꽃잔디는 초반 생장은 좋았으나 개화기가 지나고 난 후에는 전반적인 생육발달이 더뎌져 식재 후 7개월 동안 11.0%의 낮은 생장 특성을 보였다. 이와 같이 각기 다르게 생장하는 9종의 식물들을 혼식하였을 때 피복하는 특성을 조사한 결과 각 식물의 생장 특성이 피복에 영향을 미치는 것을 알 수 있었는데, 초장이 10~20 cm 자라며 로제트형으로 자라는 형태와 포복형 식물들의 조합이 높은 피복률을 나타냈다. 식물별로는 포복형인 돌나물이 맥문동, 일월비비추, 패랭이꽃, 애기기린초, 꽃잔디 등이 가장 많은 식물들과 혼식하였을 때 생장이 증가하는 종이었다. 로제트형 중에서는 일월비비추가 애기기린초, 바위취, 리시마키아, 돌나물과 동반생장이 가능한 종이었고, 지표면에서 분지가 밀생하여 자라는 패랭이꽃은 잎이 밀생하지 않는 맥문동, 바위취, 리시마키아, 돌나물과 혼식이 유리한 경향을 나타났다. 이 결과는 식물의 생장형 분류 중 근경이 분지하는 종보다 땅위로 뻗는 줄기로 번식하거나 무근경으로 영양 생장하는 종이 다른 종들과 혼식하기에 좋은 유형이라고 사료되었다.

Keywords

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