차광 정도에 따른 마늘냉이(Alliaria petiolata)의 생육특성과 효율적인 제거 방법 연구 = Growth Characteristics and Effective Removal Methods of Garlic Mustard (Alliaria petiolata) Under Different Shading Levels

국문 초록 (Abstract)

본 연구는 마늘냉이의 제거 및 관리 방안 수립을 위해서 필요한 기초자료를 얻기 위하여 다양한 차광조건에서 마늘냉이의 생육을 조사하였다. 그리고 광범위한 광 조건에서 효과적인 방제 방법을 찾기 위해서 각 처리를 통한 제거 효과를 규명하였다. 차광 정도에 따른 생육조사 결과, 차광률이 높을수록 초장, 엽장, 엽폭, 엽수, 엽면적, 비엽면적(SLA)이증가하였다. 차광 처리 8주 후 대조구 대비 75% 차광조건에서 초장은 약 1.2배, 엽장과 엽폭은 2배, 엽수는 약 6배 더 높은 값을 나타냈다. 차광 처리 4주 후 엽면적과 비엽면적(SLA)은 대조구와 비교하였을 때 75% 차광조건에서 약 1.5배, 약2배 더 높은 값을 보였다. 마늘냉이의 생체중은 75% 차광조건에서 42.06 g으로 가장 높은 값을 보였다. 건물중은 대조구와 75% 차광조건의 마늘냉이를 비교하였을 때 대조구는 15.02 g, 75% 차광조건에선 29.00 g으로 약 2배 더 높았다. Fv/ Fm의 경우, 75% 차광조건에선 생육기간 동안 건강한 식물의 범주인 0.79~0.84 사이의 값을 가졌다. 반면, 대조구는 처리 7일 후, 35% 차광조건은 처리 3주 후 0.79 이하의 값을 가졌다. 대조구 마늘냉이의 총 엽록소 함량, 엽록소 a, 엽록소 b 를 측정한 결과 모두 차광 처리구에 비하여 낮은 함량을 보였다. 대조구에 비하여 75% 차광조건의 총 엽록소 함량이 약2.4배 더 높았다. 차광조건 별 제거 방법에 따른 제거 효과를 조사한 결과, 차광 처리를 하지 않은 시험구와 35% 차광처리 시험구에서 5월에 지상부 제거와 4월에 지하부 절단 방법이 고사율 100%로 가장 처리 효과가 좋은 것으로 나타났다.
75% 차광처리 시험구에선 4월에 지하부를 절단하는 방법이 고사율 100%로 가장 처리 효과가 높게 나타났다. 생산된종자 수량의 경우, 모든 차광조건에서 5월 지상부 제거와 4월에 지하부를 절단하였을 경우 생산된 종자 개수는 0개로처리효과가가장높은것으로확인되었다.

다국어 초록 (Multilingual Abstract)

Garlic Mustard(Alliaria petiolata), an Invasive species, is an biennial plant native to Eurasia and lives in a variety of environments, from moist and shady forest lower layers to highlands. This species produces 15,000 seeds per plant, and its high reproductive capacity hinders the growth of native plants and reduces biodiversity. When spreading and establishing, it is difficult to eradicate due to its high seed production and wide ecological habitat range, so efficient management methods are needed based on ecological understanding this species. This study was conducted to evaluate the growth characteristics of Alliaria petiolata under various shading conditions and to develop an efficient control method according to the degree of shading. As a result, after 8 weeks under 75% shading conditions, Alliaria petiolata’s plant height, leaf length, leaf width, and number of leaves grew the most with 85.67cm, 6.79cm, 6.44cm, and 55.25 leaves. After 4 weeks, the leaf area and specific leaf area of Alliaria petiolata also showed the highest values of 47.86 cm2 and 510.38 cm2/g. These results show the characteristics of Alliaria petiolata as a shade plant. In order to determine the optimal removal method, mortality rate (%) and number of seeds produced were measured at different root cutting times and depths under no-shading, 35% shading, and 75% shading conditions. As a result, under no shading and 35% shading conditions, when the aboveground part was removed in May and the underground part was cut in April, the mortality rate was 100% and there was no seed production. Under 75% shading conditions, when the underground part was cut in April, the mortality rate was 100% and the number of seeds produced was 0, which was judged to be the most effective control method. The results of this study are expected to contribute to the development of strategies for Alliaria petiolata management, and it is necessary to verify the control effect through future field application.

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