• Title/Summary/Keyword: 동백

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Decomposition and Nutrient Dynamics of Leaf Litter of Camellia japonica L. in Korea (동백나무(Camellia japonica L.) 낙엽의 분해와 영양원소의 동태)

  • Cha, Sangsub;Lee, Kyung-Eui;Lee, Sang-Hoon;Choi, Moonjong;Shim, Jae Kuk
    • Korean Journal of Environment and Ecology
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    • v.30 no.1
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    • pp.110-117
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    • 2016
  • Litter fall is a source of nutrients and carbon transfer in terrestrial ecosystems. Litter decomposition provides nutrients needed for plant growth, sustains soil fertility, and supplies $CO_2$ to the atmosphere. We collected the leaf litter of evergreen broadleaf tree, Camellia japonica L., and carried out a decomposition experiment using the litterbag method in Ju-do, Wando-gun, Korea for 731 days from Dec 25, 2011 to Dec 25, 2013. The leaf litter of C. japonica remained 42.6% of the initial litter mass after experiment. The decay constant (k) of C. japonica leaf litter was $0.427yr^{-1}$. The carbon content of C. japonica leaf litter was 44.6%, and the remaining carbon content during the decomposition tended to coincide with the changes in litter mass. The initial nitrogen and phosphorus content was 0.47% and 324.7 mg/g, respectively. The remaining N in decaying litter increased 1.66-fold in the early decomposition stage, then gradually decreased to 1.18-fold after 731 days. The content of P showed the highest value (1.64-fold of initial content) after 456 days, which then fell to a 1.15-fold after 731 days. The remaining Ca, K, Mg and Na content in C. japonica leaf litter tended to decrease during decomposition. The remaining K showed a remaining mass of 8.9% as a result of rapid reduction. The initial C/N and C/P ratio of C. japonica leaf litter was 94.87 and 1368.5, respectively. However, it tended to decrease as decomposition progressed because of the immobilization of N and P (2.78 and 2.68-fold of initial content, respectively) during the leaf litter decaying. The study results showed that N and P was immobilized and other nutrients was mineralized in C. japonica leaf litter during experimental period.

Investigation of Useful Substances for Plants Distributed in Southern Region of Korea I. Lipids and Hydrocarbons (남부지방 서식식물의 유용물질 탐색 I. 지질 및 탄화수소)

  • 현규환
    • Korean Journal of Plant Resources
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    • v.10 no.4
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    • pp.324-333
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    • 1997
  • This research was conducted to determine contents of lipids and hydrocarbons for plants distributed in the sourthern region of Korea. The lipid extracts from each plants were purified by solvent fractionation, column chromatography. TLC and analyzed by gas chromatography. As a result, contents netural lipids and phospholipids were the highest in Aleurites fordii and Camellia japonica among the all plants examined. Most of the fatty acids in lipids was palmitic acid, oleic acid and linoleic acid. Content of hydrocarbon was the highest in Fatsia japonica among the all plants examined. Hydrocarbons contained in the plant was mainly more than 16 number of carbons.

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Three Newly Recorded Species of the Genera Acaphylla Keifer and Calacarus Keifer (Prostigmata: Eriophyidae) from Camellia spp. (Theaceae) in Korea (동백나무류에서 발생하는 국내 미기록 혹응애류 3종에 대한 보고)

  • Lee, Jong-Ho;Jung, Sunghoon;Lee, Seunghwan
    • Korean journal of applied entomology
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    • v.53 no.1
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    • pp.59-64
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    • 2014
  • Three species belonging to genera Acaphylla Keifer and Calacarus Keifer (Prostigmata: Eriophyidae) that cause damage to Camellia (Theaceae) plants, have been newly recorded in Korea. The three species, Acaphylla theae (Watt), Acaphylla theavagrans Kadono, and Calacarus carinatus (Green), have been redescribed and illustrated. Keys to Korean species of the genus Acaphylla; their distribution; and biological information, such as host plants and damage symptoms, are also presented.

Anti-inflammatory Effect of Extracts from Folk Plants in Ulleung Island (울릉도 민속식물 추출물의 항염증 효과)

  • Kim, Hyun-Jun;Lee, Dong-Jun;Ku, Ja-Jung;Choi, Kyung;Park, Kwang-Woo;Kang, Shin-Ho;Moon, Cheol;Lee, Pyeong-Jae
    • Korean Journal of Plant Resources
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    • v.26 no.2
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    • pp.169-177
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    • 2013
  • We investigated the effect of extracts($50{\mu}g/mL$) from 31 folk plants in Ulleung Island on nitric oxide(NO) production in lipopolysaccharide (LPS)-stimulated RAW264.7 cells. Actinidia arguta(leaf, twig), Hovenia dulcis(leaf), Camellia japonica(leaf, twig), Sambucus sieboldiana var. pendula(leaf, twig) and Fallopia sachalinensis(root) showed significant NO inhibition activity(42%~88% NO inhibition rate). Of them, we selected 3 samples(A. arguta, H. dulcis and C. japonica) showing more than 50% NO inhibition activity and little effect on cell viability. We found that the extracts suppressed the NO and prostaglandin $E_2(PGE_2)$ produced by LPS-activated RAW264.7 cells in dose-dependent manners.

Standing Biomass and Inorganic Nutrients Distribution for a Camellia japonica Stand at Mt. Cheon-gwan(Janghueng-gun, Jeonnam) (천관산(전남 장흥군) 동백나무(Camellia japonica) 천연림의 현존량과 무기영양소 분포)

  • Hwang, Jae-Hong;Lee, Sang-Tae;Kim, Byeong-Bu;Kwon, Bong-Sam;Shin, Hyun-Cheol;Lee, Kyung-Jae;Park, Nam-Chang
    • The Korean Journal of Ecology
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    • v.28 no.3
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    • pp.163-168
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    • 2005
  • This study was carried out to estimate above-ground biomass and inorganic nutrient distribution for a Camellia japonica stand located Mt. Cheon-gwan, Jeonnam province. Regression analysis of biomass for stem, current twig, branch and foliage versus diameter at breast height(DBH) was used to calculate regression equations of the form of logY = a + blogD(Y: component biomass, D: DBH). Total above-ground biomass for a Camellia japonica stand was 115.2 ton/ha(47.9 for main stem, 1.4 for current twig, 53.4 for live and dead branch, 5.6 for current foliage and 6.9 for ${\geq}1$-yr-old foliage). Component biomass was non-linearly correlated with DBH, and the difference in biomass between ${\geq}1$-yr-old and current foliage increased in proportion to DBH. Current foliage and live branch showed higher N, P and K concentrations compared to ${\geq}1$-yr-old foliage and dead branch, respectively. However, Ca concentration of current foliage and live branch was lower than that of ${\geq}1$-yr-old foliage and dead branch, respectively. Total above-ground inorganic nutrient contents(kg/ha) were distributed as follows; K: 366.4. N: 442.7, Ca: 433.3, Mg: 118.4, P: 50.5 and Na: 25.3. The proportions of inorganic nutrient content for live branch were generally the highest in all the inorganic nutrients.

Growth and Chlorophyll fluorescence Responses of Two Camellia woody Species according to Indoor Light Intensity (실내 광량에 따른 동백나무속 목본 2종의 생육 및 엽록소 형광 반응)

  • Park, Kyungtae;Lee, Cheol Hee;Kim, Hyun Woo;Hwang, Jung In;Park, Cheol;Cho, Ju sung
    • Proceedings of the Plant Resources Society of Korea Conference
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    • 2019.10a
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    • pp.59-59
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    • 2019
  • 본 연구는 몇 가지 광량 조건하에서 자생 동백나무속 상록활엽 목본 2종의 생육 및 엽록소 형광 반응을 조사함으로써 실내 도입가능 여부를 판단하고자 수행되었다. 연구재료는 2년생 차나무[Camellia sinensis (L.) Kuntze] 삽목묘와 3년생 동백나무(C. japonica L.) 실생묘를 사용하였다. 실내 광환경의 사전조사를 토대로 광량을 10, 50, 100 및 200 PPFD (${\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$)로 달리하였으며, 실험기간 동안 광 주기(12/12 h), 온도($25{\pm}1^{\circ}C$) 및 습도($55{\pm}3%$)를 통일하였다. 총 8주간 재배하였으며, 유리온실에서 동일기간 동안 재배중인 식물을 대조구로 비교하였다. 연구의 결과, 차나무는 50 PPFD 이상의 조건에서 초장, 줄기직경, 엽수 및 엽장 등의 생육이 대조구와 유사한 수준이었다. 그러나 10 PPFD에서는 모든 식물체의 잎이 말리거나 떨어지는 등의 관상가치가 저하되었으며, 엽록소 함량은 유의적으로 광량에 반비례하는 경향을 보였다. 엽록소 형광 반응은 100, 200 PPFD의 광량에서 모든 조사 항목이 대조구와 유사하였다. 동백나무는 50 PPFD에서 25%의 고사율이 나타냈다. 100 또는 200 PPFD에서 전반적인 생육이 대조구와 유사하거나 우수하였으며, 엽폭과 SPAD는 광량에 관계없이 유의적인 차이가 없었다. 또한 100, 200 PPFD의 엽록소 형광 반응은 모든 조사 항목에서 대조구와 비슷하거나 우수한 결과를 보였다.

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