[논문]전남 신안군 한반도해송숲의 곰솔 수세약화 원인 분석

김선화; 박석곤

doi:10.13047/kjee.2021.35.4.398

전남 신안군 한반도해송숲의 곰솔 수세약화 원인 분석
Causes of Weakening Tree Vigor of Pinus thunbergii in Hanbando Coastal Forest in Shinangun, Jeollanamdo Province 원문보기

한국환경생태학회지 = Korean journal of environment and ecology, v.35 no.4, 2021년, pp.398 - 407

김선화 (국립순천대학교 정원문화산업학과) , 박석곤 (국립순천대학교 산림자원.조경학부)

초록
AI-Helper

한반도해송숲의 지형환경, 기상조건, 토양 이화학적 성질과 곰솔의 생육상태를 조사해, 이곳 곰솔의 수세약화 원인을 찾아내고자 했다. 곰솔의 수세가 불량하거나 고사한 지역(수세불량지)과 대조구로서 곰솔의 생육상황이 양호한 지역(수세양호지)으로 나눠 조사했다. 그 결과, 수세불량지의 입목밀도는 수세양호지보다 유의적으로 높았지만, 수관폭은 반대로 수세양호지에서 더 넓었다. 고사목 개체수와 입목밀도는 서로 부(-)의 상관관계를 보였고, 또 입목밀도와 흉고직경·수고·수관고(crown height)·수관폭 사이에서는 부(-)의 상관관계를 보였다. 즉, 입목밀도가 높으면 개체의 수관이 겹쳐 하부 가지가 죽어 수관고와 수관폭이 작아졌다. 이에 엽량 감소에 따른 광합성량이 줄어들어 수고와 직경의 생장량이 적어졌다고 본다. 이로 인해 수세가 약해지면서 해안사구라서 수분·양분의 부족과 강한 조풍 등의 환경압이 가중되어 해안가 근처의 곰솔이 대규모로 죽은 것으로 판단된다. 한반도해송숲의 고사목 발생과 수세약화 원인은 복합적이지만, 곰솔 생장에 따른 적정한 입목밀도 관리 부족이라는 내부요인을 제1 요인으로 꼽을 수 있다. 또 곰솔 생육에 불리한 토양조건과 조풍, 강풍 등의 환경압을 제2 요인이라고 볼 수 있다.

Abstract ▼ AI-Helper

This study intended to identify causes of poor tree vigor in the Hanbando coastal forest by investigating its geographical environment, climate condition, soil physicochemical characteristics, and growth condition of Pinus thunbergii. It divided the forest into an area with poor tree vigor or dead standing trees and a control area with good tree vigor and examined them separately. The survey showed that stand density was significantly higher in the area with poor tree vigor. In contrast, the crown width in the area with good tree vigor was wider. The number of dead standing trees and the stand density showed a negative correlation. The stand density and diameter at breast height (DBH), tree height, crown height, and crown width also showed a negative correlation. The result indicated that, as the tree's stand density increases, the crowns of individual trees overlapped and the lower branches died. Then crown height and crown width decreased, and the number of leaves and photosynthesis was reduced, leading to lower tree height and weaker growth of breast diameter. As a result, tree vigor weakened, and combined with environmental pressures from the lack of moisture and nutrients in coastal soil and salty wind, P. thunbergii in coastal areas is expected to die massively. Although the causes of dead standing trees and poor tree vigor of P. thunbergii in the Hanbando coastal forest are complicated, poor management of adequate tree density in response to the growth of P. thunbergii is the primary cause. The secondary cause is external environmental pressures, including unfavorable soil conditions and salty and strong wind that obstruct the growth of P. thunbergii.

주제어

표/그림 (14)

그림 Figure 1. The location of the surveyed area and points.
그림 Figure 2. Photograph of the Hanbando coastal forest at the surveyed site.
그림 Figure 3. Wind speed change according to distance from the seashore to inland in the area of poor tree vigor.
표 Table 1. Analysis of the geographical environment of the surveyed area
표 Table 2. Soil physicochemical property of the study site
그림 Figure 4. Annual precipitation(A) and precipitation in spring (March, April, May)(B) at the surveyed site.
그림 Figure 6. Changes in the stand density of in the area of poor and good tree vigor.
그림 Figure 5. Typhoon route approached for 10 years to the surveyed site.
그림 Figure 7. Changes in the dead standing tree (A) and the stand density (B) in the area of poor tree vigor.
표 Table 3. Analysis of differences between survey items in the area of poor and good tree vigor
그림 Figure 8. Changes in tree height (A), crown height (B), and crown width (C) of the P. thunbergii.
그림 Figure 9. Changes in the shape ratio of the P. thunbergii and a schematic diagram of the tree shape.
그림 Figure 10. Estimated age of P. thunbeigii by the Surveyed site.
표 Table 4. Correlation analysis between growth survey items at the surveyed area

참고문헌 (21)

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상세보기
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