http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
미국 뉴햄프셔주 낙엽활엽수림에서 낙엽량 측정을 위한 최소 필요 표본수
배기강 한국환경생물학회 2014 환경생물 : 환경생물학회지 Vol.32 No.3
본 연구에서는 미국 뉴햄프셔주 13개 임분의 낙엽활 엽수림에서 5년간(1994~1996, 2003~2004) 낙엽량 측 정을 위한 최소 필요 표본수를 알아보았다. 임분별 최소 필요 표본수는 오차범위 10%에서는 현재의 15개 트랩 수와 비슷했으나, 1994년과 1995년은 타 년도에 비해 약 2배인 30개의 트랩수가 필요하였다. 오차범위 20%에 서는 5년간 13개 모든 임분에서 필요한 트랩수는 10개 미만으로 나타났다. 임분별로 최소 필요 표본수는 차이 가 있었는데 특히 경사가 급하고 해발고도가 높은 임분 에서 더 많은 트랩이 설치되어야 하며, 임분 연령이나 낙엽량과는 관계가 없음이 나타났다. 결론적으로 낙엽량 측정을 위한 최소 필요 표본수를 산정할 경우, 본 연구 에서와 같이 다년간의 샘플링이 필요하며, 임분의 지형 적 특성 역시 고려해야 함을 알 수 있었다. In order to accurately estimate the litter mass, we evaluated the required sample sizes across 13 chronosequence stands for five years (1994~1996, 2003~2004) in northern hardwood forests in New Hampshire, USA. It was found that the number of required litter traps in our stands (0.25~0.5 ha) within ±10% of the sample mean was appeared to be similar or higher than the 15 litter traps installed in this study. Notably, in 1994 and 1995, the number of required litter trap was twice higher than the 15 litter traps. Further, within ±20% of the sample mean, the number of required litter traps was less than 10 across all 13 stands for five years, which indicates that we can reduce the sample size. Precisely, the number of sample size had increased in stands with steep and high elevation, but no relations with stand age across 13 stands were observed. Based on these results, we suggest that it is important to sample litter mass for several years, in order to determine the number of appropriate sample size, and stands with steep and high elevation may need more litter traps.
강여진(Yeo-Jin Kang),박세진(Sae-Jin Park),배기호(Kiho Bae),유정민(Jung-Min Yoo),표형배(Hyeong-Bae Pyo),최지호(Ji Ho Cho),김택중(Tack-Joong Kim) 한국생명과학회 2011 생명과학회지 Vol.21 No.10
제 1형 과민반응은 비만세포에 의해 매개되는 알러지 반응으로서, 예기치 못한 알러젠에 의해 비만세포가 활성화 되어 탈 과립 되면서 히스타민등과 같은 여러 가지 매개체들을 분비하면서 과도하게 면역반응을 유도하게 된다. 주박(Korean rice wine lees)은 청주, 약주 등의 술을 걸러내는 과정에서 생기는 양조 부산물로서, 최근들어 청주를 걸러내는 과정에서 생기는 술 지게미의 생리기능에 대한 연구가 활발하게 진행되고 있다. 본 연구에서는 주박의 ethyl acetate (EA) 추출물을 이용하여 비만세포에서의 탈과립 억제효과를 측정하였다. 그 결과 주박 EA 추출물이 탈과립의 표지인 β-hexosaminidase의 양을 농도 의존적으로 억제하는 것을 관찰하였고, 이러한 탈과립 억제 현상이 다양한 사이토카인 중 IL-3과 IL-13의 양을 감소시킴으로써 매개된다는 사실을 RT-PCR을 통해 확인하였다. 또한 쥐에서 passive cutaneous anaphylaxis (PCA)를 유도하여 EA를 경구투여 했을 때 anaphylactic 증상을 효과적으로 억제하는 것을 관찰하였다. 이러한 결과들은 주박 EA 추출물이 항 알러지 약물의 개발에 잠재적인 후보물질이 될 수 있음을 시사한다. Mast cells, the central effector cells involved in the allergic response, release histamine, arachidonic acid, and proinflammatory cytokines. We investigated the effect of the ethyl acetate fraction (EA), derived from Korean rice wine lees, on RBL-2H3 cell degranulation and passive cutaneous anaphylaxis in an animal model. The EA fraction suppressed the release of beta-hexosaminidase, a marker of degranulation, and the mRNA expression of interleukin-3 (IL-3) and IL-13. EA also successfully suppressed the passive cutaneous anaphylaxis (PCA) reaction in mice in a dose-dependent manner. These results suggest that EA can inhibit mast cell degranulation through the inhibition of IL-3 and IL-13 mRNA expression, and that EA may potentially serve as an anti-allergic agent.
안지영,배기강,한시호,조민석,박병배 한국산림과학회 2016 Forest Science And Technology Vol.12 No.4
The objective of this study was to investigate plant growth and nutrient uptake of Chamaecyparis obtusa seedlings with heavy fertilization treatment depending on previous fertilization experience. In a previous year, one-year-old Chamaecyparis obtusa seedlings were planted at a nursery with two levels of fertilization: the first group was fertilized with a mixed nitrogen–phosphorus (N-P) fertilizer of N 41.4 g m¡2, P 18.3 g m¡2 and the second group was unfertilized as a control. After one year, seedlings of similar height and root diameter were planted into 30-l pots and underwent two treatments: no fertilization for control and heavy fertilization with Basacote 80 g pot¡1. In the control, the plants’ growth exhibited no differences according to previous fertilization experience; in the case of heavily fertilized plants, seedlings which had experienced previous fertilization showed a 29% increase in height and a 63% increase in above-ground biomass production than did seedlings with no fertilization in the previous year. The biomass allocation to below-ground was low for the heavily fertilized seedlings regardless of previous treatments. N and P concentrations of the seedlings, measured at the leaf and root, were irrelevant to previous fertilization, but were higher in the heavily fertilized plants. This study suggests that previous fertilization experience at the nursery stage may reduce the stress induced by initial heavy fertilization during out-planting.
Changes in forest disturbance patterns from 1976 to 2005 in South Korea
박필선,이규화,신한나,장웅순,이종구,정문호,배기강 한국산림과학회 2009 한국산림과학회지 Vol.98 No.5
Forest disturbances including forest fire, insect pests and diseases, landslides, and forest conversion from 1976 to 2005 were investigated to trace the changes of major forest disturbance agents and their characteristics over time in accordance with changes in natural and social environment in South Korea. While the damaged area by insect pests and diseases continuously decreased for the past 30 years, damaged areas by forest fire and landslide were fluctuating through years. The interval of large forest fires has become shorter with increased tree volume. The precipitation between January and April were significantly correlated with large fire occurrences as Pearson’s correlation coefficient -0.400 (P =0.029). The composition of major insect pests and diseases damaging Korean forests has been changed continuously, and become more diversified. While damages by pine caterpillar (Dendrolimus spectabilis) and pine needle gall midge (Thecodiplosis japonensis) decreased, damage by introduced pests has been more serious recently. The change of precipitation pattern that brought more localized heavy rain or powerful typhoon resulted in the recent increase in landslide areas. The major land uses to induce forest conversion have been changed, reflecting the changes in industrial structure in South Korea as agriculture and mining in 1970s, mining and golf ranges classified in pasture in 1980s, and road and housing construction in 1990s and 2000s. Changes in forest disturbance patterns in South Korea show that a country’s industrial development is jointly working with global warming on forest stand dynamics. Altering energy structure and land use pattern induced by industrial development accumulates forest volume and reforms microenvironments on forest floor, interacting with climate change, inducing shorter interval of large forest fire and changes in major species composition of forest insect pests and diseases.
연구논문(硏究論文) : 토양개량제 처리가 물푸레나무와 소나무 묘목의 생장과 양분농도에 미치는 영향
박병배 ( Byung Bae Park ),변재경 ( Jae Kyung Byun ),조민석 ( Min Seok Cho ),한시호 ( Si Ho Han ),정문호 ( Mun Ho Jung ),김세빈 ( Se Bin Kim ),배기강 ( Kikang Bae ) 한국환경복원기술학회(구 한국환경복원녹화기술학회) 2016 한국환경복원기술학회지 Vol.19 No.2
The production of high quality seedlings is a very important phase in silvicultural systems for successful reforestation or restoration. The purpose of this study was to measure both growth performances and nutrient responses of Fraxinus rhynchophylla and Pinus densiflora seedlings, which are commercially planted in Korea, according to soil improvement treatments. We applied 8 types of soil improvements: control with no treatment, compost B and compost Y as organic materials, vermiculite, perlite, two level of zeolite, and mix of vermiculite, perlite, and zeolite as inorganic materials in a permanent national nursery. Only compost B treatment significantly increased soil pH, organic matter, total nitrogen, available phosphorus, exchangeable potassium and calcium at the 0-10 cm soil depth. The growth of F. rhynchophylla and P. densiflora was the highest at the compost B treatment and the lowest at the vermiculate treatment. Compost B treatment allocated more carbon to aboveground than belowground by 39%, especially to foliage. On the vector diagnosis, there was ``shortage`` on compost B treatment because of all increases of N contents, N concentrations, and growth and ``over accumulation`` on vermiculite treatment because of more N uptake compared with dry weight increase. This study suggested optimal use of soil improvements is very important to improve soil quality in a permanently used nursery.