http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : ( Choonsig Kim ) (검색결과 56 건)
- 무료
- 기관 내 무료
- 유료
-
-
Kim, Seongjun,Han, Seung Hyun,Li, Guanlin,Yoon, Tae Kyung,Lee, Sang-Tae,Kim, Choonsig,Son, Yowhan The Ecological Society of Korea 2016 Journal of Ecology and Environment Vol.40 No.1
Background: As the decomposition of lignocellulosic compounds is a rate-limiting stage in the nutrient mineralization from organic matters, elucidation of the changes in soil enzyme activity can provide insight into the nutrient dynamics and ecosystem functioning. The current study aimed to assess the effect of thinning intensities on soil conditions. Un-thinned control, 20 % thinning, and 30 % thinning treatments were applied to a Larix kaempferi forest, and total carbon and nitrogen, total carbon to total nitrogen ratio, extractable nutrients (inorganic nitrogen, phosphorus, calcium, magnesium, potassium), and enzyme activities (acid phosphatase, ${\beta}$-glucosidase, ${\beta}$-xylosidase, ${\beta}$-glucosaminidase) were investigated. Results: Total carbon and nitrogen concentrations were significantly increased in the 30 % thinning treatment, whereas both the 20 and 30 % thinning treatments did not change total carbon to total nitrogen ratio. Inorganic nitrogen and extractable calcium and magnesium concentrations were significantly increased in the 20 % thinning treatment; however, no significant changes were found for extractable phosphorus and potassium concentrations either in the 20 or the 30 % thinning treatment. However, the applied thinning intensities had no significant influences on acid phosphatase, ${\beta}$-glucosidase, ${\beta}$-xylosidase, and ${\beta}$-glucosaminidase activities. Conclusions: These results indicated that thinning can elevate soil organic matter quantity and nutrient availability, and different thinning intensities may affect extractable soil nutrients inconsistently. The results also demonstrated that such inconsistent patterns in extractable nutrient concentrations after thinning might not be fully explained by the shifts in the enzyme-mediated nutrient mineralization.
-
Soil properties of cultivation sites for mountain-cultivated ginseng at local level
Kim, Choonsig,Choo, Gap Chul,Cho, Hyun Seo,Lim, Jong Teak The Korean Society of Ginseng 2015 Journal of Ginseng Research Vol.39 No.1
Background: Identifying suitable site for growing mountain-cultivated ginseng is a concern for ginseng producers. This study was conducted to evaluate the soil properties of cultivation sites for mountain-cultivated ginseng in Hamyang-gun, which is one of the most well-known areas for mountain-cultivated ginseng in Korea. Methods: The sampling plots from 30 sites were randomly selected on or near the center of the ginseng growing sites in July and August 2009. Soil samples for the soil properties analysis were collected from the top 20 cm at five randomly selected points. Results: Mountain-cultivated ginseng was grown in soils that varied greatly in soil properties on coniferous, mixed, and deciduous broad-leaved stand sites of elevations between > 200mand < 1,000 m. The soil bulk density was higher in Pinus densiflora than in Larix leptolepis stand sites and higher in the < 700-m sites than in > 700-m sites. Soil pH was unaffected by the type of stand sites (pH 4.35-4.55), whereas the high-elevation sites of > 700mwere strongly acidified, with pH 4.19. The organic carbon and total nitrogen content were lower in the P. densiflora stand sites than in the deciduous broad-leaved stand sites. Available phosphorus was low in all of the stand sites. The exchangeable cationwas generally higher in the mixed and low-elevation sites than in the P. densiflora and high-elevation sites, respectively. Conclusion: These results indicate that mountain-cultivated ginseng in Korea is able to grow in very acidic, nutrient-depleted forest soils.
-
-
Soil properties of cultivation sites for mountain-cultivated ginseng at local level
Choonsig Kim,Gap Chul Choo,Hyun Seo Cho,Jong Teak Lim 고려인삼학회 2015 Journal of Ginseng Research Vol.39 No.1
Background: Identifying suitable site for growing mountain-cultivated ginseng is a concern for ginsengproducers. This study was conducted to evaluate the soil properties of cultivation sites for mountaincultivatedginseng in Hamyang-gun, which is one of the most well-known areas for mountain-cultivatedginseng in Korea. Methods: The sampling plots from 30 sites were randomly selected on or near the center of the ginsenggrowing sites in July and August 2009. Soil samples for the soil properties analysis were collected fromthe top 20 cm at five randomly selected points. Results: Mountain-cultivated ginseng was grown in soils that varied greatly in soil properties onconiferous, mixed, and deciduous broad-leaved stand sites of elevations between > 200mand < 1,000 m. The soil bulk density was higher in Pinus densiflora than in Larix leptolepis stand sites and higher in the< 700-m sites than in > 700-m sites. Soil pH was unaffected by the type of stand sites (pH 4.35e4.55),whereas the high-elevation sites of > 700mwere strongly acidified, with pH 4.19. The organic carbon andtotal nitrogen content were lower in the P. densiflora stand sites than in the deciduous broad-leaved standsites. Available phosphorus was low in all of the stand sites. The exchangeable cationwas generally higherin the mixed and low-elevation sites than in the P. densiflora and high-elevation sites, respectively. Conclusion: These results indicate that mountain-cultivated ginseng in Korea is able to grow in veryacidic, nutrient-depleted forest soils.
-
Vegetation Type Effects on Nutrient Status and Stoichiometry of the Forest Floor in Southern Korea
Choonsig Kim,Nam Jin Noh Institute of Forest Science 2024 Journal of Forest Science Vol.40 No.1
Quantitative evaluation of nutrient status and stoichiometry on the forest floor is a good indicator of litter quality in various vegetation types. This study was conducted to determine the effects of vegetation type on the nutrient concentration and stoichiometry of forest floors at a regional scale. Forest floor samples were collected from four vegetation types of evergreen coniferous forests including Cryptomeria japonica, Chamaecyparis obtusa, evergreen broadleaf, and bamboo spp. forests in southern Korea. The dry weight of the forest floor was higher in the C. japonica and C. obtusa forests than in the evergreen broadleaf and bamboo forests. The mean carbon (C) concentrations of the forest floor were highest in the broadleaf forest, followed by the bamboo forest, C. japonica and C. obtusa forests. Mean nitrogen (N) and phosphorous (P) concentrations in the the coniferous forests were lower than those in the broadleaf and bamboo forests. The mean C:N ratio was the highest in C. obtusa forest (118±25), followed by C. japonica (66±6), evergreen broadleaf (41±1), and bamboo (30±1) forests. However, C:P and N:P ratios were lower in the coniferous forests than in the broadleaf forest indicating that the stoichiometry of the forest floor varies across vegetation types. The C, N, and P stocks on the forest floor were higher in the C. obtusa forest than in the broadleaf or bamboo forests. These results highlight that vegetation type-dependent stoichiometric ratio is an useful indicator for understanding interspecific difference in quality and quantity of the forest floor.
-
Soil properties of cultivation sites for mountain-cultivated ginseng at local level
Choonsig Kim,Gap Chul Choo,Hyun Seo Cho,Jong Teak Lim 고려인삼학회 2015 Journal of Ginseng Research Vol.39 No.3
Background: Identifying suitable site for growing mountain-cultivated ginseng is a concern for ginseng producers. This study was conducted to evaluate the soil properties of cultivation sites for mountain-cultivated ginseng in Hamyang-gun, which is one of the most well-known areas for mountain-cultivated ginseng in Korea. Methods: The sampling plots from 30 sites were randomly selected on or near the center of the ginseng growing sites in July and August 2009. Soil samples for the soil properties analysis were collected from the top 20 cm at five randomly selected points. Results: Mountain-cultivated ginseng was grown in soils that varied greatly in soil properties on coniferous, mixed, and deciduous broad-leaved stand sites of elevations between > 200mand < 1,000 m. The soil bulk density was higher in Pinus densiflora than in Larix leptolepis stand sites and higher in the 〈 700-m sites than in 〉 700-m sites. Soil pH was unaffected by the type of stand sites (pH 4.35-4.55), whereas the high-elevation sites of > 700mwere strongly acidified, with pH 4.19. The organic carbon and total nitrogen content were lower in the P. densiflora stand sites than in the deciduous broad-leaved stand sites. Available phosphorus was low in all of the stand sites. The exchangeable cationwas generally higher in the mixed and low-elevation sites than in the P. densiflora and high-elevation sites, respectively. Conclusion: These results indicate that mountain-cultivated ginseng in Korea is able to grow in very acidic, nutrient-depleted forest soils.
-
Kim, So-Ra,Kwak, Doo-Ahn,Olee, Woo-Kyun,Son, Yowhan,Bae, Sang-Won,Kim, Choonsig,Yoo, Seongjin Jointly published by Science China Press and Sprin 2010 Science China. Life sciences Vol.53 No.7
<P>The objective of this study was to estimate the carbon storage capacity of Pinus densiflora stands using remotely sensed data by combining digital aerial photography with light detection and ranging (LiDAR) data. A digital canopy model (DCM), generated from the LiDAR data, was combined with aerial photography for segmenting crowns of individual trees. To eliminate errors in over and under-segmentation, the combined image was smoothed using a Gaussian filtering method. The processed image was then segmented into individual trees using a marker-controlled watershed segmentation method. After measuring the crown area from the segmented individual trees, the individual tree diameter at breast height (DBH) was estimated using a regression function developed from the relationship observed between the field-measured DBH and crown area. The above ground biomass of individual trees could be calculated by an image-derived DBH using a regression function developed by the Korea Forest Research Institute. The carbon storage, based on individual trees, was estimated by simple multiplication using the carbon conversion index (0.5), as suggested in guidelines from the Intergovernmental Panel on Climate Change. The mean carbon storage per individual tree was estimated and then compared with the field-measured value. This study suggested that the biomass and carbon storage in a large forest area can be effectively estimated using aerial photographs and LiDAR data.</P>
-
Effects of Fertilizer on Growth, Carbon and Nitrogen Responses of Foliage in a Red Pine Stand
Choonsig Kim,Nam-Gyu Ju,Hye-Yeon Lee,Kwang-Soo Lee 한국토양비료학회 2013 한국토양비료학회지 Vol.46 No.1
This study was to examine growth, carbon and nitrogen responses in foliage following forest fertilization in a red pine stand. Two types of fertilizer (N:P:K=113:150:37 kg ha<sup>-1</sup> ; P:K=150:37 kg ha<sup>-1</sup>) were applied on late April 2011. Growth, carbon and nitrogen responses of foliage were monitored 3 times (July, September, November) after fertilization. Morphological growth responses (dry mass, leaf area, specific leaf area) with foliage age were not significantly (P > 0.05) affected by fertilizer application, while needle dry mass and leaf area of July were significantly lower in current-year-old than in one-year-old or two-year-old needles of September or November. Carbon concentration and content in foliage was little affected by fertilizer application compared with sampling month or needle age, while the NPK fertilizer produced high nitrogen concentration and content of foliage. The results indicate that nitrogen concentration and content in foliage may serve as an indicator of the nitrogen status by fertilization in a red pine stand.
-
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
