http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
경기도 광릉 상수리나무 성숙림의 질소 무기화에 관한 연구
김춘식 ( Choon Sig Kim ) 한국산림과학회 1998 한국산림과학회지 Vol.87 No.1
The objective of this study was to determine the rate of nitrogen mineralization and nitrification in a mature sawtooth oak(Quercus acutissima C_(ARRUTH)) stand in the Chungbu Forest Experiment Station, Kyonggi Province. Nitrogen mineralization and nitrification in the top 15cm of mineral soil were examined from November 1995 to November 1996 using an in situ buried bag method. Net nitrogen mineralization was 95.2㎎/㎏/yr and nitrification was 65.4㎎/㎏/yr. Nitrification consisted of 69% of annual nitrogen mineralization. Neither nitrogen mineralization nor nitrification was significantly correlated with the monthly soil temperature and soil moisture content.
김춘식(Choon Sig Kim),유장환(Jung Hwan Yoo),변재경(Jae Kyoung Byun),정진현(Jin Heon Jeong),이봉수(Bong Soo Lee) 한국산림과학회 1999 한국산림과학회지 Vol.88 No.1
Distribution of heavy metal (Zn, Pb, Cu, Cd) concentrations within forest soils was investigated in Mts. Surak and Bulam around the outskirt area, and Mts. Bukak and Inwang around the downtown area of Seoul. Metal concentrations in these soils were higher in the A horizons than in the B horizons. The mean concentrations of Zn, Pb, Cu, and Cd in the A horizons were 4.39 ㎎/㎏, 9.09 ㎎/㎏, 1.67 ㎎/㎏, and 0.03 ㎎/㎏, respectively. The concentrations in the B horizons were 2.18 ㎎/㎏ in Zn, 5.74 ㎎/㎏ in Pb, 0.55 ㎎/㎏ in Cu, and 0.01 ㎎/㎏ in Cd, respectively. With positive correlation among the metal concentrations, Zn, Pb, and Cu concentrations in the A horizon were positively correlated with soil organic matter contents (r=0.39∼0.83, p$lt;0.01), while Pb and Cu concentrations were negatively correlated with soil pH (r=-0.53∼0.59, p$lt;0.01). The results suggest that the metals in forest soils have accumulated more in the downtown than in the outskirt areas.
김춘식(Choon Sig Kim) 한국산림과학회 1999 한국산림과학회지 Vol.88 No.2
Aboveground biomass and nutrient contents of a 31-year-old pitch pine(Pinus rigida) and a 31-year-old Japanese larch(Larix leptolepis) plantations were measured in the Chungbu Forest Experiment Station, Kyunggi Province. Aboveground biomass was 170.2ton/㏊ in the pitch pine and 87.2ton/㏊ in the Japanese larch plantations. Aboveground biomass difference between both plantations was due to the difference of stand density. Aboveground biomass in both plantations was allocated as follows stemwood$gt;branch$gt;stembark$gt;needle. The concentrations of all nutrients(N, P, K, Ca, Mg) were generally higher in the Japanese larch needle than in the pitch pine because of high nutrient uptake characteristics of larch compared with pine tree species. The nutrient concentration in different tree tissues in both tree species decreased in the order of needle$gt;branch$gt;stembark$gt;stemwood. Nutrient contents of aboveground biomass were : N, 335.9 ; P, 40.4 ; K, 121.4 ; Ca, 188.6 ; Mg, 93.8㎏/㏊ in the pitch pine plantation, while nutrient contents in the Japanese larch plantation were : N, 226 ; P, 11.5 ; K, 72.9 ; Ca, 75.7 ; Mg, 37.1㎏/㏊. The nitrogen use efficiency calculated as the biomass produced by one unit of nitrogen was higher in the pitch pine than in the Japanese larch plantations. This result suggests that pine with high nitrogen use efficiency could be adapted in lower site productivity area compared with larch tree species.
김춘식 ( Choon Sig Kim ),이광수 ( Kwang Soo Lee ),손영모 ( Young Mo Son ),조현서 ( Hyun Seo Cho ) 한국산림과학회 2013 한국산림과학회지 Vol.102 No.4
This study was conducted to evaluate age-specific and generalized allometric equations and biomass expansion factors (BEFs) for each tree component across three age-sequence stands (35-year-old, 51-year-old, 62-year-old) of black pine (Pinus thunbergii Parl.) in Jinju, located in the western part of Gyeongnam province, Korea. Biomass in each tree component, i.e. foliage, branch, and stem, was quantified by destructive tree harvesting. Allometric regression equations were significant (P<0.05) with diameter at breast height (DBH) or combination of DBH and height (DBH2H) accounting for 55-98% of the variation (as indicated by coefficients of determination, R2) in aboveground biomass except for foliage biomass of the 62-year-old stand. Generalized allometric equations can be used to estimate the biomass of black pine stands because the slopes of age-specific equations over 35-year-old stands were not significantly different by the age-sequence. The stem density and biomass expansion factor (BEFs) were not significantly different (P>0.05) from different stand ages and ranged from 0.45 to 0.51 g cm-3, and from 1.32 to 1.38, respectively. The results indicate that allometric equations, stem density and aboveground BEFs in the matured black pine over 35-year-old are little influenced by different stand ages.
금산 장기생태연구 조사지 낙엽활엽수림 낙엽낙지량의 연변동
김춘식 ( Choon Sig Kim ),임종환 ( Jong Hwan Lim ),이임균 ( Im Kyum Lee ),박병배 ( Byung Bae Park ),천정화 ( Jung Hwa Chun ) 한국산림과학회 2013 한국산림과학회지 Vol.102 No.2
Litterfall production represents a major contribution of carbon and nutrient cycling in forest ecosystems. This study was carried out to determine the litterfall production in a broadleaved deciduous forest at the Mt. Keumsan Long Term Ecological Research (LTER) site, Southern Korea. Littefall was collected monthly or bimonthly from the site for 7 years from 2004 to2010. Leaf and reproductive (catkins) litters showed a seasonal variation, but litters of needle, branch, and barks were not changed across the seasons. Annual leaf litter of Quercus serrata and Carpinus laxiflora were significantly different (p<0.05) but that of C. cordata, Chamaecyparis obtusa, and Pinus thunbergii was not significantly changed for 7 years (p>0.05). Annual average litterfall production was 5,223 kg/ha, but annual variations were very large with minimum of 4,110 kg/ha/yr in 2004 and maximum of 6,002 kg/ha/yr in 2007. Total litterfall comprised of 2,323 kg/ha/yr in Q. serrata, 442 kg/ha/yr in C. laxiflora, 157 kg/ha/yr in C. cordata, 131 kg/ha/yr in Acer pseudosieboldianum, 390 kg/ha/yr in other deciduous tree species, 74 kg/ha/yr in P. thunbergii, 37 kg/ha/yr in C. obtusa, 672 kg/ha/yr in branches, 515 kg/ha/yr in miscellaneous, 448 kg/ha/yr in reproductive parts, and 54 kg/ha/yr in barks. respectively. The results indicate that litterfall production of the Mt. Keumsan LTER site was yearly fructurated with the positive linear relationship between leaf or total litterfall and annual mean temperature if no disturbance such as a typoon, and was lower than that of other Korean LTER sites.
금산장기생태조사지 낙엽활엽수림내 토양이산화탄소 방출량의 연변동
김춘식 ( Choon Sig Kim ),이임균 ( Im Kyun Lee ),임종환 ( Jong Hwan Lim ),박병배 ( Byung Bae Park ),천정화 ( Jung Hwa Chun ) 한국농림기상학회 2013 한국농림기상학회지 Vol.15 No.3
산림생태계 토양 호흡량은 지구탄소순환에 중요한 역할을 한다. 본 연구는 금산 장기생태 연구 조사지 낙엽활엽수림을 대상으로 4년 동안 토양 이산화탄소 방출량의 연 변동을 조사하였다. 금산 장기생태 연구 조사지 월별 토양 이산화탄소 방출량은 토양온도 변화와 밀접한 관계가 있었으며 토양수분함량과는 뚜렷한 경향을 보이지 않았다(P > 0.05). 동절기(1월과 2월, 2007년의 경우 1월부터 3월)를 제외한 평균 토양 이산화탄소 방출량은 2008년 0.32 g CO2 m?2 h?1, 2009년0.40g CO2 m?2 h?1, 2007년 0.41g CO2 m?2 h?1, 2010년 0.54 g CO2 m?2 h?1 순이었으며, 2008년의 연 평균 토양온도는 12.0°C로 다른 연도의 토양 온도 13.0-13.5°C에 비해 유의적으로(P<0.05) 낮았다. 토양 이산화탄소 방출량과 토양 20cm 깊이의 토양온도는 지수함수 관계가 있었으며 (R2 = 0.31-0.75, P < 0.05), 토양수분함량은 토양 이산화탄소 방출량과 유의적인 관계가 없었다(P > 0.05). 본 연구 결과에 따르면 금산장기생태연구 조사지 토양 이산화탄소 방출량의 연 변동은 토양수분보다는 토양온도 변화와 관계가 있었다. Soil respiration in forest ecosystems play an important role in global carbon cycle. This study was carried out to determine the annual variation of soil CO2 efflux for 4 years in a broadleaved deciduous forest of the Geumsan (Mt.) Long-Term Ecological Research (GLTER) site in Southern Korea. The soil CO2 efflux in the GLTER site showed annual variations with the fluctuations of annual mean soil temperature, but not with those of soil water content. The annual mean soil CO2 efflux except for winter season was 0.32 g CO2 m?2 h?1 for 2008, 0.40 g CO2 m?2 h?1 for 2009, 0.41 g CO2 m?2 h?1 for 2007, and 0.54 g CO2 m?2 h?1 for 2010. The lowest soil CO2 effluxin 2008 was associated with the lowest soil temperature (12.0 ℃) in comparison with those of other years (13.0-13.5 ℃). The exponential relationships between monthly soil CO2 efflux and the corresponding soil temperature at the soil depth of 20 cm were significant (R2 = 0.31 -0.75, P < 0.05). The results indicate that the annual variation of soil CO2 efflux was attributed to the variations of soil temperature rather than soil water content in the GLTER site.
루브라참나무림과 레시노사소나무림의 토양 질소 무기화에 있어서 개벌의 영향
김춘식 ( Choon Sig Kim ) 한국산림과학회 1995 한국산림과학회지 Vol.84 No.2
The objective of this study was to determine the rate of nitrogen mineralization at clearcut and uncut in oak(Quercus rubra L.) and pine(Pinus resinosa Ait.) stands. The study sites were located in northern Lower Michigan, U.S.A. Nitrogen mineralization rates in the top 15㎝ of mineral soil were examined during the 1991 and 1992 growing seasons(May - October) using an in situ buried tag technique. diet nitrogen mineralization in oak stands over the course of both growing seasons was 67㎏/㏊ in the clearcut and 30㎏/㏊ in the uncut stands. In contrast, net nitrogen mineralization in pine stands was 27㎏/㏊ and 13㎏/㏊ for the same treatments. Total net nitrogen mineralization rates were always higher in oak stands than in pine stands. Extractable NO₃^- before and after one month soil incubation in both oak and pine stands was generally not detectable in the uncut stands, but in the pine clearcut treatment(nitrification over the course of both growing seasons : 3.3㎏/㏊). The results indicated that : 1) substantial increases in the amount of available soil nitrogen occurred following clearcuts in both stands : and 2) the loin rates of nitrification may be an important mechanism for retention of nitrogen in both oak and pine stands.