• Title/Summary/Keyword: respiration amount

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Correlation between a Soil Respiration and Environmental Factors, Air Temperature and Precipitation in Pinus densiflora Community in Namsan and Meaning on an Urban Forest Management (남산 소나무군락의 토양호흡과 환경요인인 기온과 강수량과의 상호관계 및 도시림 관리의 의미)

  • Lee, EungPill;Lee, SooIn;Park, JaeHoon;Kim, EuiJoo;Hong, YoungSik;Lee, SeungYeon;You, YoungHan
    • Journal of Korean Society of Forest Science
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    • v.109 no.2
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    • pp.136-144
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    • 2020
  • To prepare the management plan for reduction of the organic carbon emission caused by soil respirations, the amount of organic carbon emission from the pedosphere in Pinus densiflora community within metropolis park was quantified and then the correlations between quantified values and climate factors were analyzed. To this study, we investigated the amount of emitted organic carbon through soil respirations of Pinus densiflora community within Mt. Nam in Seoul-si, Korea, and identified correlationship with environmental factors. As a result, the average amount of organic carbons, included in soil respirations of P. densiflora community in Mt. Nam, was 7.978 ton C ha-1 yr-1. Also, precipitation of spring (March to May) was one of the environmental factors explaining the increase and decrease of soil respiration. This results suggest a drainage management to keep the low water content in understorey soils is important to an ecological management of metropolitan forests.

Organic carbon distribution and cycling in the Quercus glauca forest at Gotjawal wetland, Jeju Island, Korea

  • Han, Young-Sub;Lee, Eung-Pill;Park, Jae-Hoon;Lee, Seung-Yeon;Lee, Soo-In;You, Young-Han
    • Journal of Ecology and Environment
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    • v.42 no.2
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    • pp.60-69
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    • 2018
  • Background: This study was conducted from March 2011 to February 2013 in order to evaluate the ecosystem value by examining the organic carbon distribution and cycling in the Quercus glauca forest, evergreen oak community at Seonheul-Gotjawal, Jeju Island. Results: The amount of organic carbon distribution was $124.5ton\;C\;ha^{-1}$ in 2011 and $132.63ton\;C\;ha^{-1}$ in 2012 for aboveground biomass. And it was $31.13ton\;C\;ha^{-1}$ in 2011 and $33.16ton\;C\;ha^{-1}$ in 2012 for belowground biomass. In total, the amount of organic carbon distribution in plants was 155.63 and $165.79ton\;C\;ha^{-1}$ in 2011 and 2012, respectively. In 2011 and 2012 respectively, the amount of organic carbon distribution was 3.61 and $6.39ton\;C\;ha^{-1}$ in the forest floor and it was 78.89 and $100.71ton\;C\;ha^{-1}$ in the soil. As shown, most carbon was distributed in plants. Overall, the amount of organic carbon distribution of the Q. glauca forest was $238.13ton\;C\;ha^{-1}$ in 2011 and $272.89ton\;C\;ha^{-1}$ in 2012. In 2011, the amount of organic carbon fixed in plants through photosynthesis (NPP) was $14.22ton\;C\;ha^{-1}\;year^{-1}$ and the amount of carbon emission of soil respiration was $16.77ton\;C\;ha^{-1}\;year^{-1}$. The net ecosystem production (NEP) absorbed by the Q. glauca forest from the atmosphere was $5ton\;C\;ha^{-1}\;year^{-1}$. Conclusions: The carbon storage value based on such organic carbon distribution was estimated about $23.81mil\;won\;ha^{-1}$ in 2011 and $27.29mil\;won\;ha^{-1}$ in 2012, showing an annual increment of carbon storage value by $3.48mil\;won\;ha^{-1}$. The carbon absorption value based on such NEP was estimated about $500,000won\;ha^{-1}\;year^{-1}$.

Effects of Bottom Ash Amendment on Soil Respiration and Microbial Biomass under Anaerobic Conditions (혐기조건에서 석탄바닥재가 토양호흡량 및 미생물 생체량에 미치는 영향)

  • Park, Jong-Chan;Chung, Doug-Young;Han, Gwang-Hyun
    • Korean Journal of Soil Science and Fertilizer
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    • v.45 no.2
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    • pp.260-265
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    • 2012
  • Soil respiration under flooded conditions is considered to be very small compared with aerobic soil respiration of soil organic matter. However, anaerobic decomposition of soil plays a key role in carbon cycling in flooded ecosystems. On the other hand, coal-ash wastes, such as fly ash and bottom ash, are known to function as a soil amendment for mitigating $CO_2$ emission and enhancing carbon sequestration in up land soils. In this study, we investigated bottom ash as a soil amendment for mitigating $CO_2$ emission, and thus enhancing carbon sequestration under anaerobic conditions. We observed that amendment of bottom ash without external organic source led to significant reduction in $CO_2$ emission rate and in total cumulative $CO_2$ emission flux over the incubation period, which was proportional to the amount of bottom ash applied. We also found that soil microbial biomass increased in response to application of bottom ash. These results suggest that bottom ash can be utilized to store $CO_2$ as a stable soil organic carbon in flooded ecosystems, as in aerobic situations.

Effect of Amino Acids on Oxygen Consumption of the Mang-Kong Frog (Gallula tornieri VOGT) Liver (맹꽁이 간의 산소소비량에 미치는 수종 아미노산의 영향)

  • 박상윤;최순영
    • The Korean Journal of Zoology
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    • v.4 no.2
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    • pp.20-24
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    • 1961
  • The present experiment was conducted to investigate the rate of oxygen consumption in relation to the several amino acids in the Mang-Kong frog ,Gallula tornieri VOGT. 1. When the liver tissue was suspended in the Ringer's solution (0.85% NaCl), the amount of oxygen consumption per hour was 0.043$\mu$l/mg , whereas when it was suspended in M/15, pH 5.8 phosphate buffer the oxygen consumption reached 0.93$\mu$l/mg. 2. When 0.5ml of 1% alanine and 0.5ml of 0.5% arginine were used as respiratory material the amount of oxygen consumption increased remarkably, while on the other hand glycine showed little influence on the amount of oxygen consumption. 3. When 0.5ml of 0.1% , 0.5% alanine-arginine mixture, 0.5ml of 0.1% , 0.5% alanine-glycine mixture and 0.5ml of 1 % arginine-glycine were added the oxygen consumption in the liver tissue increased somewhat in comparison to the case in which single amino acid was used. 4. Glycine appeared to have influence on the respiration of the liver tissue but the amount of oxygen consumption increased as the concentration of arginine-glycine mixture increased, whereas the rate of oxygen consumption increased remarkably as alaninie-glycine mixture decreased. It was evidenced that in the combination of alanine-arginine the rate of oxygen consumption increased as the concentration of the mixture decreased and vice versa.

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A Study on the Sensitivity Elevation about Spirometer Using Ultrasound Sensing Method (초음파 센싱 방식의 spirometer에 대한 sensitivity 향상 연구)

  • Han, Seung-Heon;Kim, Young-Kil
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.9 no.1
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    • pp.204-209
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    • 2005
  • The respiration measurement method using the ultrasound sensor hardly gets an influence of an error of inertia and pressure and it is a respiratory detection device available semi-permanently. This device measures the amount and flow of respiration through using a delivery speed difference of the ultrasound waves that are a return format by the pneumatic stream that is a flogging of ultrasound waves during transmission and receipt as having used a characteristic of ultrasound waves. In this paper, it improved sensitivity of a signal to happen during transmission and receipt of a sensor because measurement must be performed with a patient to the center and measurement was played in a weak breathing so that it was possible.

Arabidopsis SIZ1 positively regulates alternative respiratory bypass pathways

  • Park, Bong-Soo;Kim, Sung-Il;Song, Jong-Tae;Seo, Hak-Soo
    • BMB Reports
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    • v.45 no.6
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    • pp.342-347
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    • 2012
  • Plant mitochondria possess alternative respiratory pathways mediated by the type II NAD(P)H dehydrogenases and alternative oxidases. Here, E3 SUMO ligase was shown to regulate alternative respiratory pathways and to participate in the maintenance of carbon and nitrogen balance in Arabidopsis. The transcript abundance of the type II NAD(P)H dehydrogenases NDA2 and NDB2 and alternative oxidases AOX1a and AOX1d genes was low in siz1-2 mutants compared to that in wild-type. The addition of nitrate or ammonium resulted in a decrease or an increase in the expression of the same gene families, respectively, in both wild-type and siz1-2 mutants. The amount of free sugar (glucose, fructose and sucrose) was lower in siz1-2 mutants than that in wild-type. These results indicate that low nitrate reductase activity due to the AtSIZ1 mutation is correlated with an overall decrease in alternative respiration and with a low carbohydrate content to maintain the carbon to nitrogen ratio in siz1-2 mutants.

Studies on the Photosynthesis of Korean Ginseng III. Effects of the Light Transparent Rate of Shading on the Photosynthesis Ability of Korean Ginseng Plant (Panax ginseng C. A. Meyer) (고려인삼엽의 광합성능력에 관한 연구 III. 투광율이 광합성 능력에 미치는 영향)

  • 조재성;원준연;목성균
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.31 no.4
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    • pp.408-415
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    • 1986
  • This study was conducted to define the effects of light transparent rate of the shading on the photosynthesis ability of the ginseng leaves and their seasonal changes. Regardless the effects of light transparent rate of shading and age of ginseng plant, 10,000 lux was the most adequate light intensity for the maximum photosynthesis of ginseng leaves and seasonal difference was not significant. The ginseng plants which were grown under 10 to 15 percent light transparent shading showed the highest photosynthesis ability. The photosynthesis ability of ginseng leaves was significantly decreased in September than June and the decreasing rate was higher at the ginseng plants planted on back rows than front rows. In June, the ginseng plants grown under 10 to 15 percent light transparent shading showed high respiration amount but in September, those grown under 20 to 25% light transparent shading showed the highest respiration. The amount of chlorophyll of ginseng leaf was significantly decreased by increasing light transparent rate of shading.

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Budget and distribution of organic carbon in Taxus cuspidata forest in subalpine zone of Mt. Halla

  • Jang, Rae-Ha;Jeong, Heon-Mo;Lee, Eung-Pill;Cho, Kyu-Tae;You, Young-Han
    • Journal of Ecology and Environment
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    • v.41 no.1
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    • pp.19-28
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    • 2017
  • Background: In order to investigate organic carbon distribution, carbon budget, and cycling of the subalpine forest, we studied biomass, organic carbon distribution, litter production, forest floor litter, accumulated soil organic carbon, and soil respiration in Taxus cuspidata forest in Halla National Park from February 2012 to November 2013. Biomass was calculated by using allometric equation and the value was converted to $CO_2$ stocks. Results: The amount of plant organic carbon was $13.60ton\;C\;ha^{-1}year^{-1}$ in 2012 and $14.29ton\;C\;ha^{-1}year^{-1}$ in 2013. And average organic carbon introduced to forest floor through litter production was $0.71ton\;C\;ha^{-1}year^{-1}$. Organic carbon distributed in forest floor litter layer was $0.73ton\;C\;ha^{-1}year^{-1}$ on average and accumulated organic carbon in soil was $51.13ton\;C\;ha^{-1}year^{-1}$ on average. In 2012, Amount of released $CO_2$ from soil to atmosphere was 10.93 ton $CO_2ha^{-1}year^{-1}$. Conclusions: The net ecosystem production based on the difference between net primary production of organic carbon and soil respiration was $-1.74ton\;C\;ha^{-1}year^{-1}$ releasing more carbon than it absorbed.

Effect of 1-Methylcyclopropene Treatment on the Fruit Quality of Pear c.v. "Hwasan" during the Storage at Ambient Temperature (1-MCP 처리가 '화산' 배의 상온 저장 중 품질에 미치는 영향)

  • Park, Yong-Seo;Lee, Pil-Ho;Heo, Buk-Gu
    • Food Science and Preservation
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    • v.17 no.5
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    • pp.595-601
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    • 2010
  • We investigated the effects of 1-methylcyclopropene (1-MCP) treatment (0, 0.5, and 1.5 ppm) for 16 hours, followed by storage at ambient temperature, on the qualities of pears (Pyrus pyrifolia c.v. "Hwasan"). Color differences, as measured using the Hunter L, a, and b values, showed the greatest decreases before storage, and 8 weeks after storage, when fruit was exposed to 1.5 ppm 1-MCP. The sensory qualities of c.v. "Hwasan" pears were good until 4 weeks of storage after treatment with 0 ppm 1-MCP, until 6 weeks when 0.5 ppm 1-MCP was employed, and until 7 weeks when 1.5 ppm 1-MCP treatment was performed. Fruit and storage quality in terms of all of hardness, sugar content, PPO activity, respiration amount, and ethylene production increased in the 8 weeks after application of 1.5 ppm 1-MCP. Consequently, it seems that 1-MCP treatment, especially at 1.5 ppm, before storage of pears at ambient temperature, effectively improves the quality of pears of c.v. "Hwasan".

Effects of Pesticides on Soil Microflora -I. Effects of pesticides on Microflora, Soil Respiration and Enzyme Activity in Soil (농약(農藥)이 토양(土壤) 미생물상(微生物相)에 미치는 영향(影響)에 관(關)한 연구(硏究) -I. 살균(殺菌)·살충제(殺蟲劑)가 토양중(土壤中)의 미생물(微生物), 토양호흡(土壤呼吸) 및 효소활성(酵素活性)에 미치는 영향(影響))

  • Kim, Kwang Sick;Kim, Yong Woong;Lee, Myung Chul;Kim, Hyun Woo
    • Korean Journal of Soil Science and Fertilizer
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    • v.20 no.4
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    • pp.375-385
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    • 1987
  • This study was carried out to investigate the effects of pesticides on soil respiration, microflora and enzymes in loam soil, and on pathogenic microorganisms in continuous pepper cropping soil. The results are summarized as follows. No significant effect of pesticides on soil respiration was shown, with the exception of propoxur which slightly increased at $10{\mu}g\;g^{-1}$ treatment. When pesticides were treated, the amount of soil microorganisms generally decreased at the early stage of incubation and the number of microflora was much more decreased at 60-day incubation. When pesticides were treated, the amount of soil enzyme activity was inhibited at the early stage of incubation and gradually recovered at the last stage of incubation. The amount of polygalacturonase activity was increased at the 20-and 30-day incubation in propoxur treatment plot. The amount of ${\beta}$-glucosidase and dehydrogenase activity was increased at 20-and 60-day incubation in carbofuran and acephate treatment plot. The amount of phosphatase activity was increased at 60-day incubation in propoxur and isoprocarb treatment plot. The amount of Fusarium generally decreased in continuous pepper cropping soil, with the exception of isoprocarb and acephate treatment plot which significantly increased. The amount of Pythium increased at 60-day incubation with the exception of captan treatment plot which significantly decreased.

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