폐광산 주변의 목본 식생 현황 및 오염 토양에 대한 목본 종자의 발아 특성

서경원,손요환,김래현,구진우,노남진,경지현,김정규 한국환경농학회 2006 한국환경농학회지 Vol.25 No.1

Comparison of Nitrogen Fixation for North- and South-facing Robinia pseudoacacia Stands in Central Korea

Noh, Nam-Jin,Son, Yow-Han,Koo, Jin-Woo,Seo, Kyung-Won,Kim, Rae-Hyun,Lee, Yoon-Young,Yoo, Kyung-Seun 한국식물학회 2010 Journal of Plant Biology Vol.53 No.1

The nitrogenase activity, root nodule biomass, and rates of nitrogen (N) fixation were measured in 25-year-old pure north- and south-facing Robinia pseudoacacia stands in an urban forest of Seoul (Kkachisan Mountain) in central Korea. The nitrogenase activity was estimated using an acetylene reduction (AR) assay, which showed an increasing trend during the early growing season, with sustained high rates from June through to September with a decrease thereafter. July had the highest nitrogenase activity rate (micromoles $C_2H_4$ per gram dry nodule per hour), averaging 95.8 and 115.1 for the north- and south-facing stands, respectively. The maximum root nodule biomass (kilograms per hectare) was 45.7 and 9.1 for the north- and south-facing stands in July, respectively. The AR rate appeared to be strongly correlated to the soil temperature ($r^2$=0.68, P<0.001) and soil pH ($r^2$=0.59, P<0.001) while root nodule biomass was correlated to the soil temperature ($r^2$=0.36, P<0.01) and water content ($r^2$=0.35, P<0.05). The soil temperature showed clear differences between seasons, while there was a significant difference in soil pH, organic matter, total N concentrations, and available phosphorus between the north- and south-facing stands. The $N_2$ fixation rates during the growing season varied from 0.1 to $37.5\;kg\;N\;ha^{-1}month^{-1}$ depending on the sampling location and time. The annual $N_2$ fixation rate (kg N per hectare per year) was 112.3 and 23.2 for the north- and south-facing stands, respectively. The differences in $N_2$ fixation rate between the two stands were due mainly to the differences in total nodule biomass.

Carbon and nitrogen dynamics in a <i>Pinus densiflora</i> forest with low and high stand densities

Noh, Nam Jin,Kim, Choonsig,Bae, Sang Won,Lee, Woo Kyun,Yoon, Tae Kyung,Muraoka, Hiroyuki,Son, Yowhan Oxford University Press 2013 Journal of plant ecology Vol.6 No.5

<P><B>Aims</B></P><P>Understanding carbon (C) and nitrogen (N) dynamics and their dependence on the stand density of an even-aged, mature forest provides knowledge that is important for forest management. This study investigated the differences in ecosystem total C and N storage and flux between a low-density stand (LD) and a high-density stand (HD) and examined the effects of stand density on aboveground net primary productivity (ANPP), total belowground C allocation (TBCA) and net ecosystem production (NEP) in a naturally regenerated, 65- to 75-year-old <I>Pinus densiflora</I> S. et Z. forest.</P><P><B>Methods</B></P><P>LD (450 trees ha<SUP>−1</SUP>) and HD (842 trees ha<SUP>−1</SUP>) were established in an even-aged, mature <I>P. densiflora</I> forest in September 2006. The forest had been naturally regenerated following harvesting, and the stand density was naturally maintained without any artificial management such as thinning. The diameter at breast height (DBH ≥ 5.0cm) of all live stems within the stands was measured yearly from 2007 to 2011. To compare C and N storage and fluxes in LD and HD, C and N pools in aboveground and belowground biomass, the forest floor, coarse woody debris (CWD) and soil; soil CO<SUB>2</SUB> efflux (<I>R</I> <SUB>S</SUB>); autotrophic respiration (<I>R</I> <SUB>A</SUB>); litter production; and soil N availability were measured. Further, ANPP, TBCA and NEP were estimated from plot-based measurement data.</P><P><B>Important Findings</B></P><P>Ecosystem C (Mg C ha<SUP>−1</SUP>) and N (Mg N ha<SUP>−1</SUP>) storage was, respectively, 173.0±7.3 (mean ± SE) and 4.69±0.30 for LD and 162±11.8 and 4.08±0.18 for HD. There were no significant differences in C and N storage in the ecosystem components, except for soils, between the two stands. In contrast, there were significant differences in aboveground ANPP and TBCA between the two stands (<I>P</I> < 0.05). Litterfall, biomass increment and <I>R</I> <SUB>S</SUB> were major C flux components with values of, respectively, 3.89, 3.74 and 9.07 Mg C ha<SUP>−1</SUP> year<SUP>−1</SUP> in LD and 3.15, 2.94 and 7.06 Mg C ha<SUP>−1</SUP> year<SUP>−1</SUP> in HD. Biometric-based NEP (Mg C ha<SUP>−1</SUP> year<SUP>−1</SUP>) was 4.18 in LD and 5.50 in HD. Although the even-aged, mature <I>P. densiflora</I> forest had similar C and N allocation patterns, it showed different C and N dynamics depending on stand density. The results of the current study will be useful for elucidating the effects of stand density on C and N storage and fluxes, which are important issues in managing natural mature forest ecosystems.</P>

Carbon and nitrogen storage in an age-sequence of Pinus densiflora stands in Korea.

Noh, Nam-Jin,Son, Yowhan,Lee, Sue-Kyoung,Seo, Kyung-Won,Heo, Su-Jin,Yi, Myong-Jong,Park, Pil-Sun,Kim, Rae-Hyun,Son, Yeong-Mo,Lee, Kyeong-Hak Jointly published by Science China Press and Sprin 2010 Science China. Life sciences Vol.53 No.7

<P>The carbon (C) and nitrogen (N) storage capabilities of Pinus densiflora in six different stand ages (10, 27, 30, 32, 44, and 71 years old) were investigated in Korea. Thirty sample trees were destructively harvested and 12 were excavated. Samples from the above and belowground tree components, coarse woody debris (CWD), forest floor, and mineral soil (0-30 cm) were collected. Tree biomass was highest in the 71-year-old stand (202.8 t ha(-1)) and lowest in the 10-year-old stand (18.4 t ha(-1)). C and N storage in the mineral soil was higher in the 71-year-old stand than in the other stands, mainly due to higher soil C and N concentrations. Consequently, the total ecosystem C and N storage (tree+forest floor+CWD+soil) was positively correlated with stand age: increasing from a minimum in the 10 year old stand (18.8 t C ha(-1) and 1.3 t N ha(-1)) to a maximum in the 71-year-old stand (201.4 t C ha(-1) and 8.5 t N ha(-1)). The total ecosystem C storage showed a similar sigmoidal pattern to that of tree C storage as a function of the age-sequence, while N storage in the CWD, forest floor and mineral soil showed no significant temporal trends. Our results provide important insights that will increase our understanding of C and N storage in P. densiflora stands and our ability to predict changes according to stand age in the region.</P>

Diurnal pattern of soil CO2 efflux for a Pinus densiflora S. et Z.

( Noh Nam Jin ),( Yo Whan Son ),( Woo Yong Jo ),( Na Yeon Lee ),( San Won Bae ) 한국임학회 2010 한국임학회 정기학술발표논문집 Vol.2010 No.-

Short Communication : Diurnal Pattern of Soil CO2 Efflux in a Pinus densiflora Forest Measured Using an Open-flow Chamber System

( Nam Jin Noh ),( Yow Han Son ),( Sue Kyoung Lee ),( Woo Yong Jo ),( Na Yeon Lee ),( Sang Won Bae ),( Hyun Seop Kim ) 한국임학회 2010 Forest Science And Technology Vol.6 No.1

Biomass Accumulations and the Distribution of Nitrogen and Phosphorus within Three Quercus acutissima Stands in Central Korea

( Nam Jin Noh ),( Yo Whan Son ),( Rae Hyun Kim ),( Kyung Won Seo ),( Jin Woo Koo ),( In Hyeop Park ),( Young Jin Lee ),( Kyeong Hak Lee ),( Yeong Mo Son ) 한국식물학회 2007 Journal of Plant Biology Vol.50 No.4

Above- and belowground biomass and nitrogen (N) and phosphorus (P) distribution within three Quercus acutissima stands were investigated in central Korea. The average age (year) and diameter at breast height (DBH, cm) were 10.8 and 7.9 for Stand 1, 38.2 and 17.1 for Stand 2, and 44.0 and 20.7 for Stand 3, respectively. Fifteen trees were destructively harvested for dimension analysis of component biomass (stem wood, stem bark, foliage, branches, and roots) plus N and P concentrations. Total biomass (t ha.1) was 88.7 for Stand 1, 154.9 for Stand 2, and 278.1 for Stand 3 while N and P contents in all tree components (kg ha.1) were 483.3 and 52.2, 697.1 and 55.0, and 1113.9 and 83.7. Nitrogen concentrations were highest in the foliage, followed by the stem bark, branches or roots, and stem wood. In contrast, P concentrations were greatest in the roots, then foliage, branches, stem bark, and stem wood. In general, N and P concentrations in these components significantly decreased with tree age and DBH, while N and P contents significantly increased with age and size. These relationships were stronger for size than for age. Our current data could be utilized to estimate N and P budgets for silvicultural practices, including fertilization, thinning, and harvesting.

Root Nodule Biomass of Robinia pseudoacacia and Amorpha fruticosa Seedlings with Fertilization Treatments

Noh, Nam-Jin,Son, Yo-Whan,Seo, Kyung-Won,Kim, Rae-Hyun,Koo, Jin-Woo,Ban, Ji-Yeon,Kim, Jeong-Gyu The Ecological Society of Korea 2006 Journal of Ecology and Environment Vol.29 No.2

Root nodule biomass, and seedling biomass and growth were examined for 2-year-old Robinia pseudoacacia and Amorpha fruticosa seedlings following fertilization treatments. Organic fertilizer, solid combination fertilizer, and organic fertilizer plus solid combination fertilizer were used for the study. Root nodule biomass (g/plant) ranged from 3.00 to 7.06 for R. pseudoacacia and varied from 1.52 to 2.32 for A. fruticosa, respectively. In all treatments, root nodule biomass of R. pseudoacacia was significantly higher than those of A. fruticosa. Fertilization significantly increased root nodule biomass for only R. pseudoacacia, however, there were no significant differences in root nodule biomass among fertilization treatments. Root nodule biomass was not influenced by soil nitrogen (N) and phosphorous (P) concentrations following fertilization treatments. Seedling biomass (components and total) and growth (diameter at root collar and height) were strongly correlated with root nodule biomass for the two N fixing tree species.

이뇨제 남용 중 발생한 급성 신손상과 동반된 극심한 중증 저칼륨혈증 (0.6 mEq/L) 1예

현진남 ( Jin Nam Hyun ),권순효 ( Soon Hyo Kwon ),정재면 ( Jae Myun Jung ),전진석 ( Jin Seok Jeon ),노현진 ( Hyun Jin Noh ),한동철 ( Dong Cheol Han ) 대한신장학회 2008 춘계학술대회 초록집 Vol.28 No.1

묘령 및 식재밀도에 따른 느티나무 조림목의 초기 생육 특성

노남진 ( Nam Jin Noh ),조민석 ( Min Seok Cho ) 한국산림과학회(구 한국임학회) 2020 한국산림과학회지 Vol.109 No.4

본 연구는 조림목 묘령과 식재밀도가 느티나무 조림목의 초기 생육 특성에 미치는 영향을 알아보고자 수행되었다. 2017년 3월말에 온대 남부지역인 영덕지역 2 ha 면적에 묘령[용기묘(1-0), 용기묘(2-0)] × 식재밀도(3,000본 ha^-1, 5,000본ha^-1) 4가지 조합으로 느티나무 묘목을 식재하였다. 각 처리별 3개의 조사구를 설치하였고, 조림목의 근원경과 수고 생장을 매년 9월마다 3년 동안(2017-2019년) 측정하여 수간 재적을 계산하였다. 느티나무의 초기생존율은 처리간에 차이를 나타내지 않았다. 수고는 묘령(1-0)과 묘령(2-0)에서 밀식처리의 효과가 나타나지 않았으나, 근원경과 H/D율은 묘령(2-0)에서 식재후 3년차에 밀식처리 효과가 나타났다. 개체목당 수간재적은 묘령(2-0) 5,000본 ha^-1 처리구에서 가장 높았으며, 묘령(1-0) 3,000본 ha^-1 처리구에서 가장 낮았다. 수간재적은 묘령과 식재밀도 간에 상호작용 효과는 없었고, 묘령과 식재밀도가 높을수록 높은 수간재적을 보였다. 단위면적당 수간 재적은 용기묘(1-0) 3,000본 ha^-1대비 용기묘(1-0) 5,000본 ha^-1는 85%, 용기묘(2-0) 3,000본 ha-1와 5,000본 ha^-1는 각각 약 68%, 300% 향상되었다. 본 연구는 식재밀도가 묘령에 따라 생장에 다르게 영향을 미친다는 것을 보여주며, 용기묘(2-0)의 초기 생장을 향상시키는데 5,000본 ha^-1 처리가 적합하다는 것을 제안한다. We investigated the effect of seedling age and planting density on early growth performance of Zelkova serrata trees. Containerized Z. serrata seedlings, 1-year-old and 2-year-old, were planted according to two different planting densities (3,000 and 5,000 trees ha-1) at the end of March, 2017. Three plots were established for each treatment (2 seedling ages × 2 planting densities). We calculated the survival rate (%) of out-planted seedlings as well as the stem volume based on the root collar diameter (RCD) and height (H) in September of each year, from 2017 to 2019. Seedling age and planting density did not affect survival rate of the out-planted trees. Planting density did not affect height of the trees, whereas the treatment significantly affected RCD and the H/D ratio for 2-year-old seedlings in 2019. The stem volume per tree was highest in the plot of 2-year-old seedlings at 5,000 trees ha^-1 and lowest in the 1-year-old seedlings at 3,000 trees ha^-1. In addition, the tree height in both 1-year-old and 2-year-old Z. serrata trees was greater in the 5,000 trees ha-1 plot than in the 3,000 trees ha-1 plot. There was no interactive effect between seedling age and planting density on stem volume; however, as seedling age and planting density increased, stem volume of Z. serrata trees increased. The values for stem volume per hectare are 85%, 68%, and 300% higher in 1-year-old 5,000 trees ha-1, 2-year-old 3,000 trees ha-1, and 2-year-old 5,000 trees ha^-1 plots, respectively, compared to the values in 1-year-old 3,000 trees ha-1. This result shows that high planting density (close planting) affects tree growth differently based on seedling age, and suggests that the planting density of 5,000 trees ha-1 is suitable for 2-year-old seedlings to improve early growth field performance.