• Journal of The Korean Society of Grassland and Forage Science
• /
• v.16 no.2
• /
• pp.133-138
• /
• 1996

To investigate the effects of inorganic phosphate ($P_2O_5$ 200kg/ha), fermented cow manures($P_2O_5$ 200kg/ha, 400kg/ha) and poultry manures($P_2O_5$ 200kg/ha, 400kg/na) levels mixed with sawdust on the soil changes and productivity of alfalfa monoculture, a field experiment arranged by randonmized complete block design was conducted at National Livestock Research Institute in Suwon, September, 1993 to December 1995. The results are as follows. S1. Soil pH was changed from 5.40(before experiment) to 6.17(fermented cow manure, $P_2O_5$ 400kg/ha), 6.76 (fermented poultry manure, $P_2O_5$400kg/ha) and 6.3l(inorganic phosphate, $P_2O_5$ 200kg/ha) at 0~5cm depth of subsoil, respectively. Organic contents after experiment were lower as a range of 2.41%~3.15% than those before experiment. 2. Total nitrogen contents of each treatment showed as 0.13%~0.16% at 0~5cm depth of subsoil comparing with before experiment(0.15%). Available phosphate content of inorganic phosphate($P_2O_5$200kgha) was highest as 405ppm. lowest as 125ppm(fermented poultry manure, $P_2O_5$ 200kg/ha) than before trial(205ppm). 3. K and Ca contents of after experiment were appeared to 0.22%~0.78% and 6.45%~9.45% comparing with before experiment(0.10% and 3.56%), respectively. 4. During two years, average DM yield of fermented cow rnanure($P_2O_5$ 400kg/ha) was highest as 11, 731kg/ha and lowest as 9, 017kg/ha at fermented poultry manure plot($P_2O_5$ 200kg/ha) with as sawdust, but no significant difference was found among treatment(P>0.05). 5. CP production, NEL and TDN yield of fermented cow manure($P_2O_5$ 400kg/ha) were highest as 2, 282kg/ha 69, 900kg/ha and 6, 392kg/ha, respectively, but no significant difference among treatment(P>0.05). 6. In inorganic contents of alfalfas, there was not show same tendency in accordance with treatments. As a results mentioned above, it was possible to use 200kg $P_2O_5/ha$ of fermented cow or poultry manure with sawdust instead of inorganic phosphae fertilizer.

• Korean Journal of Medicinal Crop Science
• /
• v.11 no.2
• /
• pp.83-88
• /
• 2003

This experiment was carried out to investigate the effect of the mulching of hairy vetch and pig manure on the growth, yield and crude protein contents of the mulching of hairy vetch and application of animal slurry were treated and investigated in $2000{\sim}2002$. At the first year of cultivation, there were no differences among the treatments in plant height, but second year the growth of plants increased and continued over long times as the hairy vetch mulched and fertilized. The length and diameter of plant root were increased in the plot of hairy vetch mulching and the application of animal slurry. At first year of cultivation, no clear difference was found for among the treatments on dry weight and dry matter ratio in roots. At second year of cultivation, they were increased at in the plot of mulching and fertilizer treatment. The appearances of weeds in the field on Astragalus membranaces were much lower on the plots of live-mulching of hairy vetch than those on the control. The yield of root was 255kg highest in the plot of mulching and animal slurry application of 2-year-old roots. The root yield of Astragalus membranaces was increased about $8{\sim}10%$ compared to that with control, due to supply of nutrients. During the cultivation times, organic matters and N contents in soil increased by the mulching of hairy vetch and the application of animal slurry. The concentration of K, Ca concentration in soil showed a tendency to increase.

• Analytical Science and Technology
• /
• v.31 no.1
• /
• pp.14-22
• /
• 2018

After signing the WHO FCTC in 2003, South Korea ratified the FCTC in 2005. This study was conducted to provide data on toxic constituents that can be used as useful information for the level of exposure to Korean smokers. Emissions data from five brands of cigarettes were tested under the ISO and "Canadian Intense (HCI)" smoking regimes, respectively. We conducted an analysis of 25 compounds containing nicotine, tar, carbonyls, phenolics, volatile organic compounds (VOCs), and semi-VOC cigarette smoke. Tar and nicotine showed levels of 4.3 to 5.8 mg/cig and 0.4 to 0.5 mg/cig, respectively, which are within the range of tolerance presented in ISO 8243. In the case of carbonyls, formaldehyde was detected within a range of 8.2 to $14.3{\mu}g/cig$, and acetaldehyde was present within a range of 224.7 to $327.2{\mu}g/cig$ under the ISO smoke regime. Crotonaldehyde was not detected under the ISO regime, and all of the carbonyls showed values 2.3 to 4.5 times higher under the HCI regime than those under the ISO regime. Catechol, which showed a level of 47.0 to $80.5{\mu}g/cig$ under the ISO regime and 117.5 to $184.7{\mu}g/cig$ under the HCI regime, was the highest constituent among the phenols. The amount of isoprene was 91.7 to $158.3{\mu}g/cig$ under the ISO regime and 221.0 to 377.0 under the HCI regime. To summarize, most of the constituents showed a tendency to be detected at levels 2 to 4 times higher under the HCI regime than under the ISO regime. Above all, these results represent the first analysis in Korea from an independent institute of tobacco companies under accreditation of ISO 17025.

• KOREAN JOURNAL OF CROP SCIENCE
• /
• v.56 no.3
• /
• pp.192-198
• /
• 2011

Establishment of mechanized soybean production system without herbicide is required for organic soybean production in recent. Effects of mechanized soybean planting with partial tillage between growing rye living mulch, which was sown in April or early May, on weed suppression, soybean early growth and yield were investigated with different rye sowing dates and locations in 2007 and 2008, respectively. Effect of rye living mulch on weed suppression at 40~50 days after soybean planting was high as much as 70~90% regardless of rye sowing dates. In particular, a strong suppression effect on the occurrence and growth of Echinochloa crus-galli which occupied 60~80% of total weed biomass was observed. Rye living mulch sown on April 9, of which biomass was more than that sown on April 27, inhibited soybean early growth severely and reduced soybean grain yield in 2007. However, soybean grain yield was no t reduced despite suppression of early growth of soybean plant by living mulch sown during from late April to early May compared with conventional planting. Rye sowing before late April was not proper considering tendency of weed occurrence in spring because of unfavorable changes in weed suppression, early growth and grain yield of soybean according to amount of living mulch.

• Korean Journal of Environmental Agriculture
• /
• v.20 no.1
• /
• pp.8-14
• /
• 2001

To investigate the effects of waste sludge from antibiotic fermentation on the growth of young radish and chemical properties of soil, five levels of fertilizer, control (recommended fertilizer, $N-P_2O_5-K_2O=160-59-104$ kg/ha), AS(control + sludge 1,000 kg/ha), AC(control + conventional compost 1,000 kg/ha), SNS(control - subtracting 30% N of sludge + sludge 1,000 kg/ha) and SNC(control - subtracting 30% N of conventional compost + conventional compost 1,000 kg/ha) were applied and radish was grown twice with same treatments on May and August in 1998. Germination rate and early growth of young radish grown with AS and SNS were lower than those grown in control and with AC, SNC. This negative effects by adding the sludge in the early growth seemed to be caused by damage of ammonia gas released during degradation of the sludge in soil. However, yield of young radish showed no significant difference among all the treatments including the AS and SNS at the 1st and 2nd experiment, and these suggested that the latter half of growth of young radish was accelerated by adding the sludge. Contents of T-N in young radish and inorganic N in soil showed a tendency to increase by adding the sludge while antibiotic substance, cephalosporin-C, was not detected in plant material and soils after harvest of young radish in both experiments. Consequently, waste sludge from antibiotic fermentation, which contains high levels of organic matter and nitrogen could be used as an useful resource in agriculture.

• Journal of Conservation Science
• /
• v.26 no.4
• /
• pp.429-436
• /
• 2010

Dyestuffs extracted from fifteen kinds of natural dyeing materials were researched on their antimicrobial performance against 3 kinds of bacteria and 2 kinds of fungi in order to develop conservation/storage materials of traditional and natural dyed papers. The three types of mordants were evaluated by using the same method and then mixed with the dyestuffs to research their antimicrobial performance. With those results, dyed paper was made by mixing mordants with 9 kinds of dyestuffs with excellent antimicrobial performance. Among the dyed papers, Cotinus coggygria, Coptis chinensis, Phellodendri amurense, Rhus javanica and Acer ginnala multiple mordant papers were found to have an antibacterial quality against fungi, while, in the insect repellent experiment using termites, Coptis chinensis and Phellodendri amurense dyed papers were found to have insect repellent qualities. Also, with regard to the research result about the affect of dyeing paper on other materials like metal, Coptis chinensis have relatively stable qualities. Also, the three types of dyeed paper by Cotinus coggygria, Coptis chinensis and Phellodendri amurense, were found to have a tendency to remove harmful gases. Not only can these dyed papers be used for making storage box for cultural properties to prevent various organic artifacts from bio-damaging, but they can also be utilized as functional finishing materials in various spaces.

• Journal of the Korean Society of Food Science and Nutrition
• /
• v.31 no.2
• /
• pp.277-283
• /
• 2002

In the present study, adverse effects of megadose of dietary perilla oil were investigated in an experimental model consisted of 6 groups of Wistar rats. To compare the adverse effects of megadose perilla oil with different kind of dietary fat, rats were fed one of the following diets for one month: 10% beef tallow (B$_1$B), 10% corn oil (C$_1$B), 10% perilla oil (P$_1$B), 20% beef tallow (B$_2$B), 20% corn oil (C$_2$B), and 20% perilla oil (P$_2$B) diet. The body weight gain rate seemed to be more affected by the size of fat contents than the species of fat in the diet, so the body weight gain rate of 20% fat groups were significantly higher than those of 10% fat groups in spite of the larger amount of flood intake in 10% fat groups than in 20% fat groups. The levers of plasma triglyceride and total-cholesterol in 20% fat groups were significantly increased in dose dependent fashion when compared to 10% groups, the values of beef tallow (B$_2$B) group being the highest among all groups. Plasma glutainic pyruvic transferase activities and level of blood urea nitrogen had a tendency to increase along with increase of fat contents (%) in diets, the values of P$_2$B group, the highest among all groups, being beyond the normal levers. The plasma carbon dioxide concentration of P$_2$B group was the highest in all groups and exceeded the normal value, there being no significant difference among the plasma carbon dioxide concentration of others groups. The results showed that large dose and long term intake of dietary perilla oil had some adverse effects on hepatic and other organic functions in rats.

• Journal of the Korean Society of Food Science and Nutrition
• /
• v.18 no.1
• /
• pp.101-108
• /
• 1989

In order to determine optimal conditions for the preparation of Japanese apricot wine, the changes in major components were experimented during ripening. A weight was $18.3{\pm}2.57\;g$ at June 22 or so. Moisture was reached $92.1{\pm}0.17\;%$ at that time. Respiration amounts were decreased by degrees during the ripening of Japanese apricot but came near climacteric maximum state about June 22. pH was decreased from $2.76{\pm}0.025$ to $2.51{\pm}0.081$, titratible acidity was increased from $1.15%{\pm}0.083%$ to $1.39{\pm}0.061%$. Fe was detected most of all and Zn, Mg, Cu and Ca were checked by the next order in mineral contents. And the rate of mineral contents was decreasing phenomenon slightly with ripening. Total sugar, about June 8, was higher than any other time with $1.74{\pm}0.090%$ and reducing sugar was increased with similarly a tendency of total sugar. Malic and citric acid were much of organic acids. The content of malic acid was decreased greatly but ctric acid was increased during ripening.

• Journal of Ecology and Environment
• /
• v.42 no.1
• /
• pp.20-29
• /
• 2018

Background: For various reasons such as agricultural and economical purposes, land-use changes are rapidly increasing not only in Korea but also in the world, leading to shifts in the characteristics of local carbon cycle. Therefore, in order to understand the large-scale ecosystem carbon cycle, it is necessary first to understand vegetation on this local scale. As a result, it is essential to comprehend change of the carbon balance attributed by the land-use changes. In this study, we attempt to understand accumulated soil carbon (ASC) and soil respiration (Rs) related to carbon cycle in two ecosystems, artificially turned forest into pastureland from forest and a native deciduous temperate forest, resulted from different land-use in the same area. Results: Rs were shown typical seasonal changes in the alpine pastureland (AP) and temperate deciduous forest (TDF). The annual average Rs was $160.5mg\;CO_2\;m^{-2}h^{-1}$ in the AP, but it was $405.1mg\;CO_2\;m^{-2}h^{-1}$ in the TDF, indicating that the Rs in the AP was lower about 54% than that in the TDF. Also, ASC in the AP was $124.49Mg\;C\;ha^{-1}$ from litter layer to 30-cm soil depth. The ASC was about $88.9Mg\;C\;ha^{-1}$, and it was 71.5% of that of the AP. The temperature factors in the AP was high about $4^{\circ}C$ on average compared to the TDF. In AP, it was observed high amount of sunlight entering near the soil surface which is related to high soil temperature is due to low canopy structure. This tendency is due to the smaller emission of organic carbon that is accumulated in the soil, which means a higher ASC in the AP compared to the TDF. Conclusions: The artificial transformation of natural ecosystems into different ecosystems is proceeding widely in the world as well as Korea. The change in land-use type is caused to make the different characteristics of carbon cycle and storage in same region. For evaluating and predicting the carbon cycle in the vegetation modified by the human activity, it is necessary to understand the carbon cycle and storage characteristics of natural ecosystems and converted ecosystems. In this study, we studied the characteristics of ecosystem carbon cycle using different forms in the same region. The land-use changes from a TDF to AP leads to changes in dominant vegetation. Removal of canopy increased light and temperature conditions and slightly decreased SMC during the growing season. Also, land-use change led to an increase of ASC and decrease of Rs in AP. In terms of ecosystem carbon sequestration, AP showed a greater amount of carbon stored in the soil due to sustained supply of above-ground liters and lower degradation rate (soil respiration) than TDF in the high mountains. This shows that TDF and AP do not have much difference in terms of storage and circulation of carbon because the amount of carbon in the forest biomass is stored in the soil in the AP.

• Culinary science and hospitality research
• /
• v.18 no.5
• /
• pp.45-62
• /
• 2012

The purpose of this study is to secure the basic data for the physical environment of an eco-friendly restaurant by surveying and analyzing customer perceptions of the servicescape of an eco-friendly restaurant and to verify the organic causation of the servicescape of an eco-friendly restaurant and customer perceived value, attitude and behavior intention. The samples for empirical analysis were selected from the customers over 20 years who lives in Seoul and Kyung-gi suburbs have experienced visiting eco-friendly restaurant or green restaurant more than once a month. Total 300 copies of questionnaire were distributed for the survey from the second day to the fifteenth day of April for 14 days, and total 264 (88.0%) copies of survey questionnaire except for some questionnaires that had much strong lean tendency or the missing value was discovered. The research results are as follows; when a customer recognizes an eco-friendly restaurant favorably, he or she considers that servicescape plays an important role in deciding perceived value through tangible and intangible perceived values. Since, customer perceived value has a positive effect on attitude and behavior intention, the customer considers as affected on his/her behavior intention when satisfied with the eco-friendly restaurant, which is considered that positive customer attitude will have an effect on behavior intention. Thus, it is considered based on this in-depth analysis result that maintaining and providing servicescape of high standard in the manager's perspective will have a direct effect on ensuring tangible outcomes.