[논문]벌채 유형별 일본잎갈나무 천연 치수의 발생 및 생장특성 분석

정준모; 김현섭

doi:10.14578/jkfs.2020.109.4.400

벌채 유형별 일본잎갈나무 천연 치수의 발생 및 생장특성 분석
Occurrence and Growth Characteristics of Natural Seedlings by Harvest Type in a Larix kaempferi Forest 원문보기

한국산림과학회지 = Journal of korean society of forest science, v.109 no.4, 2020년, pp.400 - 412

정준모 (국립산림과학원 산림기술경영연구소) , 김현섭 (국립산림과학원 산림기술경영연구소)

초록
AI-Helper

본 연구는 일본잎갈나무 천연갱신 치수의 생장특성을 분석하여 현장 적용 가능한 갱신 방법을 제안하기 위해 수행되었다. 이를 위해 경기도 가평과 경상북도 봉화에 모수작업과 개벌작업을 실시하여 시험지를 조성하고, 종자 유입, 천연치수의 발생과 생장 특성을 분석하였다. 그 결과 갱신유형별 종자 낙하량은 보잔목작업, 모수작업, 개벌작업 순으로 많았고, 치수 발생율은 처리구(벌채, 지면긁기)가 평균 2.4%, 무처리구 0.3%로 처리구가 무처리구에 비해 8.0배 많았다. 처리구의 갱신 1년차 6월의 치수량은 약 47만본/ha이었고 갱신 3년차 10월의 치수량은 약 78천본/ha이었으며, 치수의 평균 크기는 근원경 6.5 mm, 수고 50.4 cm이었다. 이에 따라 천연갱신에 의한 일본잎갈나무 후계림 조성은 종자결실과 낙하 시기에 맞추어 벌채와 지면긁기를 실시하면 성공 가능성이 크고, 일본잎갈나무의 빠른 생장을 고려하면 효과적인 갱신기술이 될 것으로 판단된다.

Abstract ▼ AI-Helper

We analyzed the growth characteristics of naturally regenerated seedings of Larix kaempferi in order to propose a field-applicable regeneration method. Experimental sites were established at Gapyeong in Gyeonggi-do and at Bonghwa in Gyeongsangbuk-do. We analyzed seed inflow features, occurrence, and growth characteristics of natural seedlings for three years. The reserved seed-tree site producedthe greatest number of inflow seeds and followed by seed-tree site and clear-cut site. In addition, the reserved seed-tree method was found to be more efficient than other methods in evenly scattering seeds. The rate of seedling occurrence at treatment sites (e.g., harvesting and scratching) was 2.4%, which is 8.0 times higher than the seedling occurrence (0.3%) at the non-treatment sites. There were approximately 470,000 seedlings per hectare at the treatment sites in June of the first year after regeneration and approximately 78,000 seedlings per hectare in October of the third year. The average diameter of the root collar of the seedlings in the third year was 6.5 mm, and the average height of the seedlings was 50.4 cm. These results indicate that it is possible to create a secondary forest of L. kaempferi by natural regeneration if harvesting and scraping are implemented during seed fructification. Considering the rapid growth of L. kaempferi shown in this study, the proposed method would be an efficient reforestation technique.

주제어

표/그림 (20)

그림 Figure 1. Location of Gapyeong (L) and Bonghwa (R) experimental site.
그림 Figure 2. Verification of fruiting cycle in Gapyeong and Bonghwa experimental site compares to nation and seed orchard.
그림 Figure 3. Wind direction and speed of seed scattering seasons in Gapyeong (L) and Bonghwa (R) experimental site.
표 Table 1. Geographical features before harvest in Gapyeong and Bonghwa experimental sites.
표 Table 2. Stand growth conditions of Larix kaempferi in Gapyeong and Bonghwa experimental site before harvest.
그림 Figure 4. Monthly seed fall amount of Gapyeong and Bonghwa experimental site (Sep. 2016 ~ Apr. 2017).
그림 Figure 5. Seed fall amount by cutting methods in Gapyeong experimental site (Sep. 2016 ~ Apr. 2017).
표 Table 3. Treatments in Gapyeong and Bonghwa experimental sites.
그림 Figure 6. Seed fall amount by cutting methods in Bonghwa experimental site (Sep. 2016 ~ Apr. 2017).
그림 Figure 7. Seed fall pattern of seed-tree method in Gapyeong (L) and Bonghwa (R) experimental site (Sep. 2016 ~ Apr. 2017). Small letters indicate significant differences among distances with in same seasons (P < 0.05).
그림 Figure 8. Seed fall pattern of reserved seed-tree method in Gapyeong (L) and Bonghwa (R) experimental site (Sep. 2016 ~ Apr. 2017). Small letters indicate significant differences among distances with in same seasons (P < 0.05).
그림 Figure 9. Seed fall pattern of strip-cutting method in Gapyeong(L) and Bonghwa(R) experimental site(Sep. 2016 ~ Apr. 2017). Small letters indicate significant differences among distances with in same seasons (P < 0.05).
그림 Figure 10. Seed fall pattern of patch-cutting method by seed rich year(L) and bad year(R) in Bonghwa experimental site. Seed rich and bad years are 2016 and 2017, respectively. Small letters indicate significant differences among distances with in same seasons (P < 0.05).
표 Table 4. Annual seedlings amount and survival rate of Gapyeong experimental site.
표 Table 5. Annual seedlings amount and survival rate of Bonghwa experimental site.
그림 Figure 11. Root collar diameter (L) and height (R) of naturally regenerated seedlings by cutting methods in Gapyeong experimental site. Small letters indicate significant differences among cutting methods (P < 0.05). Vertical bars present SD of the mean. (A) 1 year old seedlings, (B) 2 years old seedlings, (C) 3 years old seedlings.
그림 Figure 12. Root collar diameter (L) and height (R) of naturally regenerated seedlings by cutting methods in Bonghwa experimental site. Small letters indicate significant differences among cutting methods (P < 0.05). Vertical bars present SD of the mean. (A) 1 year old seedlings, (B) 2 years old seedlings, (C) 3 years old seedlings.
그림 Figure 13. Annual growth for root collar diameter and height of regenerated seedlings in experimental sites. (A) Gapyeong, (B) Bonghwa.
그림 Figure 14. Seedling amount depend on distance from seed source by cutting methods of 3 years old seedlings in Gapyeong experimental site. Vertical bars present SD of the mean. (A) Seed-tree method, (B) Strip cutting method, (C) Reserved seed-tree method.
그림 Figure 15. Root collar diameter (L) and height (R) of 3 years old seedlings by cutting methods in Gapyeong experimental site. Small letters indicate significant differences among distance from seed source (P < 0.05). Vertical bars present SD of the mean. (A) Seed-tree method, (B) Strip cutting method, (C) Reserved seed-tree method.

참고문헌 (16)

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상세보기
Tatsuo, A., Taichi, I., Katsutosi, K., Yoshihiro, N., Kitamura, M. and Ryosuke, K. 2004. Research on natural regeneration technology in artificial forests. Research Report Heisei 15. Forest and Forestry Infrastructure Improvement Division. Tokyo. pp. 77-103.
Toshimitsu, K. and Masami, S. 2007. Development of Larch Multi-layered forest by Natural Seeding Regeneration. https://www.rinya.maff.go.jp/hokkaido/kikaku/pdf/20happyou_04.pdf
Wang, Z.L., Xu, F.Q., Wang, G. and Ding, M.X. 1993. Discussion on the technology of regeneration in larch plantation. Journal of Inner Mongolia Forestry Science and Technology 1993(1): 19-22. (In Chinese)
Yim, K.B. 1991. The point of silviculture. Hyangmunsa. Seoul. pp. 347.

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