[논문]식재밀도에 따른 물푸레나무 조림목 식재 후 7년간의 생장 특성

한승현; 양아람; 노남진; 조민석

doi:10.14578/jkfs.2022.111.4.482

식재밀도에 따른 물푸레나무 조림목 식재 후 7년간의 생장 특성
The Growth Performances of Fraxinus rhynchophylla According to Planting Density over Seven Years after Planting 원문보기

한국산림과학회지 = Journal of korean society of forest science, v.111 no.4, 2022년, pp.482 - 489

한승현 (국립산림과학원 산림기술경영연구소) , 양아람 (국립산림과학원 국제산림연구과) , 노남진 (강원대학교 산림과학부) , 조민석 (국립산림과학원 산림기술경영연구소)

초록
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본 연구는 식재밀도가 식재 후 7년간 물푸레나무 조림목의 생장 특성에 미치는 영향을 분석하여 적정 식재밀도를 제시하고자 하였다. 2015년 3월, 강원도 평창군에 위치한 조림지(3 ha)에 물푸레나무 2년생 노지묘를 4가지의 식재밀도(3천본, 5천본, 7천본, 10천본 ha^-1)로 식재하였다. 조림목의 생존율, 근원경, 수고를 2015년-2021년까지 매년 9월에 측정하였고, H/D율(Height/Diameter ratio)과 수간 재적을 산출하였다. 식재밀도에 따른 물푸레나무 조림목의 생존율은 84-97% 범위로 유의한 차이가 없었으며, H/D율(54.5-59.2%) 또한 뚜렷한 차이를 나타내지 않았다. 그러나 근원경, 수고, 수간 재적은 7천본 ha^-1에서 다른 식재밀도 처리에 비해 높게 나타났다. 특히 식재 7년차 수간 재적(cm³ tree^-1)은 7천본 ha^-1에서 1,356.1로 가장 높았으며, 10천본 ha^-1 (958.6), 5천본 ha^-1 (773.0), 3천본 ha^-1 (579.5) 순이었다. 물푸레나무는 식재밀도가 높아질수록 수광 경쟁에 의해 빠른 초기 생장을 보였으나, 임계 식재밀도(10천본 ha^-1)에서는 생장이 상대적으로 낮아지는 것을 확인하였다. 향후 조림비용이 고려된 적정 식재밀도 적용시 물푸레나무 조림지에서의 우수한 조림 성과를 기대할 수 있을 것으로 보인다.

Abstract ▼ AI-Helper

This study aimed to determine the optimal planting density of Fraxinus rhynchophylla assessed from the early growth performance at various planting densities over the 7-year period after planting. The study site was in Pyeongchang County, South Korea, and seedlings of 2-year-old (bare-root seedlings) F. rhynchophylla were planted at four densities (3,000, 5,000, 7,000, and 10,000 trees ha-1) in March 2015. The survival rate, root-collar diameter (RCD), and height (H) were measured from 2015 to 2021, and the H/D (H/RCD) ratio and stem volume were calculated. The survival rate (84-97%) and H/D ratio (54.5-59.2%) were not affected by the planting density during the study period, but the RCD, H, and stem volume were significantly higher for 7,000 trees ha-1 than for other planting densities. Especially, the stem volume (cm3 tree-1) at 7 years after planting was highest for 7,000 trees ha-1 (1,356.1), followed by 10,000 trees ha-1 (958.6), 5,000 trees ha-1 (773.0), and 3,000 trees ha-1 (579.5). As the planting density increased, F. rhynchophylla seedlings showed initial rapid growth due to light competition, but relatively low growth at excessive planting densities. In the future, use of a suitable planting density considering planting costs should provide outstanding growth performance of F. rhynchophylla on plantations.

주제어

표/그림 (6)

그림 Figure 1. Experimental design for treatments of planting densities (a) and a panoramic photograph in F. rhynchophylla plantation.
표 Table 1. The soil properties of F. rhynchophylla plantation in 2015 and 2018.
그림 Figure 2. The survival rate of F. rhynchophylla trees according to planting density. The vertical bars represent standard errors of the mean (n=3).
표 Table 2. Results of two-way ANOVA of the planting density, year and their interaction effects on survival rate, root collar diameter(RCD), height, and stem volume for F. rhynchophylla.
그림 Figure 3. The stem volume (cm³ tree^-1) of F. rhynchophylla trees according to planting density. The vertical bars represent standard errors of the mean (n=90). Different letters within each year indicate significant differences among the planting density by Duncan's multiple range test (P < 0.05).
표 Table 3. The root collar diameter (RCD) and height (mean±standard error) of F. rhynchophylla trees according to planting density and year.

AI 본문요약
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문제 정의

, 2021). 따라서 본 연구에서는 온대 북부지역의 물푸레나무 조림지에서 다양한 식재밀도에 따라 식재 후 7년동안 조림목의 생존율, 근원경, 수고, 수간재적 등 초기 생육 특성 변화를 분석하여, 물푸레나무의 적정 식재밀도를 구명하고자 하였다.

데이터처리

Different letters within each year indicate significant differences among the planting density by Duncan’s multiple range test (P < 0.05).
조림 경과년도에 따라 식재밀도 처리가 물푸레나무 조림목의 생육 특성(생존율, 수고, 근원경, H/D율, 수간재적)에 미치는 영향은 반복측정 이원분산분석(Two-way repeated measures ANOVA)를 이용하여 분석하였고, 각 해당연도의 식재밀도 처리 효과는 일원분산분석과 Duncan의 다중검정 테스트를 이용하여 분석하였다. 통계분석은 SAS 9.

후속연구

(2016)은 상대적으로 양분 수요가 높은 고밀도 식재밀도 처리에서 식물체 내 질소, 인, 비구조성 탄수화물 함량이 감소하고 이는 결과적으로 조림목의 생리 반응 및 생장 쇠퇴로 이어진다고 보고하였다. 본 연구지에서도 식재 후 시간 경과에 따른 토양 양분 감소가 확인되었고, 향후 조림목의 생존율 및 생장을 정확히 구명하기 위해서는 토양 양분뿐만 아니라 식물체 내 질소, 인, 비구조성 탄수화물 함량 등에 대한 분석이 필요하다(Hidaka and Kitayama, 2009; Villar-Salvador et al., 2015).

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