Go to the main menu
Skip to content
Go to bottom
REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Korean Journal of Environmental Agriculture
Journal Basic Information
Journal DOI :
The Korean Society of Environmental Agriculture
Editor in Chief :
Volume & Issues
Volume 19, Issue 5 - Dec 2000
Volume 19, Issue 4 - Dec 2000
Volume 19, Issue 3 - Sep 2000
Volume 19, Issue 2 - Jun 2000
Volume 19, Issue 1 - Mar 2000
Selecting the target year
Growth characteristics of different Barley cultivars grown on NaCl stress
Cho, Jin-Woong ; Park, Ki-Sun ; Lee, Sok-Young ;
Korean Journal of Environmental Agriculture, volume 19, issue 1, 2000, Pages 1~5
This study was conducted to investigate the growth characteristics of four barley cultivars to NaCl stress of 100mM on 10 March (Tillering stage) and 10 April(Panicle formation stage). Plant grown in Wagner pot(1/5,000 a) with sand culture. Plant height, root length, leaf number and tillering number reduced by NaCl stress and tillering number was shorter than any other character. The reduction of those with NaCl treatment was more severe in 10 March treatment compared to in 10 April it. Leaf, root and straw weight were decreased with NaCl treatment and root weight was more sensitive than any others on 10 March and 10 April treatment. One hundred grain weight (g) in grain component was the most severe in 10 March treatment and panicle number per plant was the most severe in 10 April treatment. The result also varied depending on the cultivars and the time of NaCl stress. In terms of yield component, salt sensitivity was low in order of Bunong, Chalssalbori, Dongbori 1, and Neulssalbori in 10 March and Neulssalbori, Dongbori 1, Bunong and Chalssalbori in 10 April treatment by 100mM NaCl.
Adsorption Coefficients of Eight Pesticides for Citrus Orchard Soils with Different Soil Organic Matter
Oh, Sang-Sil ; Hyun, Hae-Nam ; Moon, Doo-Khil ;
Korean Journal of Environmental Agriculture, volume 19, issue 1, 2000, Pages 6~12
This study was carried out to determine the adsorption characteristics of eight pesticides on thirty citrus orchard soil so soil samples were taken from nineteen soil series containing different fractions of organic carbon(Foc). The adsorption characteristics for eight pesticides fitted to Freundlich isotherms. The adsorption isotherms showed C-type for alachlor and chlorpyrifos, L-type for linuron and diniconazole. and S, C, and L-types for metribuzin, metolachlor, and alachlor with increasing Foc, respectively. In particular, the adsorption of chlorothalonil showed S, C, L, and H-types with increasing Foc. Distribution coefficient(Kd) values of metribuzin, metolachlor, and alachlor were below
and increased linearly with Foc. Kd values of linuron, diuron and chlorothalonil increased exponentially to 60, 200, and
, respectively and those of diniconazole and chlorpyrifos increased logarithmically. Kf value. Freundlich adsorption coefficiient, increased with Kd in the same manner with Kd. Furthermore, the linearity of Kf value was larger than that of Kd value.
The Effect of Algae on Coagulation and Filteration of Water Treatment Process
Lim, Young-Sung ; Song, Won-Seb ; Cho, Ju-Sik ; Lee, Hong-Jae ; Heo, Jong-Soo ;
Korean Journal of Environmental Agriculture, volume 19, issue 1, 2000, Pages 13~19
Seasonal variations of dominant algae species and the effects of these algae on coagulation and filteration of water treatment were investigated at Chilseo water treatment plant in downstream of Nakdong river from January in 1995 to Desember of 1998. The water quality of Nakdong river was found to be a hyper eutrophic state during the investigation periods. In the measurement, Chlorophyll-a contents ranged
and total nitrogen contents(T-N) and total phosphorus contents(T-P) exceeded more than 3.4mg/l and 0.1mg/l, respectively. The changes in dominant algae species was in the order of Stepanodiscus sp., Asterionella sp., Melosira sp., Microcystis sp. and Synedra sp. from spring to winter. Microcystis sp. especially, was blooming during summer and Synedra sp. and Stepanodiscus sp. during winter. Although most diatomous algae appeared in the water treatment process caused filter clogging and reduced efficiency of coagulation and sedimentation, Synedra sp. and Stepanodiscus sp were revealed as the main trouble algae. Malfunction of water treatment process caused by Synedra sp. and Stepanodiscus sp. started at the algae concentrations of 800cells/ml and 1,820cells/ml, respectively. When chlorophyll-a content was
, the optimum amounts of coagulant were found to be 40mg/l of Alum and 16mg/l of PACS. Under condition of chlorophyll-a content of
, addition of Alum at the level of 75mg/l and PACS at the level of 35mg/l showed the lowest turibidity. The result indicates that increased amounts of the coagulants should be added for a better water treatment as chlorophyll-a contents increased. Addition of Alum at the amount of 60mg/l and 30mg/l of PACS removed Stepanodiscus sp. algae at the rate of 85% and 83%, respectively. In case of Synedra sp., 50mg/l of Alum and 25mg/l of PACS showed removal rates of 79% and 81%, respectively. Synedra sp. algae at the standing crops of 1,500cells/ml started filter clogging and a filtering process was completely inhibited after 8 hours. At this situation the filter clogging by Synedra sp. algae occurred at the depth of 5cm from the top anthracite layer. On the other, other algae did filter clogging at the depth of 10cm.
Distribution of Chromium in Radish and Soil by Successive Leather Processing Sludge Treatment
Kwon, Soon-Ik ; Jung, Kwang-Yong ; Jung, Goo-Bok ; Park, Baeg-Gyoon ;
Korean Journal of Environmental Agriculture, volume 19, issue 1, 2000, Pages 20~25
Leather processing sludge were amended in sandy loam soil successively to investigate effects on soil properties and radish crop. Total nitrogen concentration of the sludge was
, and chromium was
. Sludges were treated twice each year for 4 year, and the soils were mixed with sludge to give mixtures equivalent to sludge application rates of 12.5, 25 and
in dry matter. Chemical fertilizers
used as a control. All treated soils were croped to altari and kimjang radish in spring and fall respectively. Organic matter and Cr content in soils were increased with input rate and years of successive application of leather processing sludge, while phosphorous and potassium contents were decreased. Yields of the first harvested altari grown in sludge treated pots were less than control. In the other hand, yields of the first kimjang radish were more than control in proportion with sludge input rates until third year fall. But in fourth year, all sludge treated pot was much less than control in radish yield. Chromium contents of radish in treated soil increased and Cr contents in leaves of radish were higher than roots. Leather processing sludge was considered a potential hazardous resource to soil and crops when it use continuously, because it has high Cr concentration.
Pollutant Loading and Changes of Water Quality at the Namdae-cheon Watershed in Keum river Districts
Choi, Chang-Hyun ; Han, Kang-Wan ; Cho, Jae-Young ; Chun, Jae-Chul ; Kim, Seong-Jo ;
Korean Journal of Environmental Agriculture, volume 19, issue 1, 2000, Pages 26~31
This study was carried out to investigate the changes of water quality, the pollutant loading by population, livestock, and land use at the Namdae-cheon in Keum river districts. Water samples were taken at the four sites of watershed, the nutrients of which were analyzed periodically from July, 1995 to April, 1998. Content of nutrients in water samples ranged from 1.8 to 5.8 mg/L for total nitrogen, from 0.01 to 0.08 mg/L for total phosphorus and from 0 to 0.007 mg/L for ortho-phosphate respectively. Nitrogen loading by pollutant unit was investigated 550.4 ton/yr as 358.1 ton/yr by livestock, 129.3 ton/yr by land use and 63.0 ton/yr by population. Phosphorus loading by pollutant unit was investigated 79.1 ton/yr as 60.6 ton/yr by livestock, 5.2 ton/yr by land use and 13.3 ton/yr by population. The loading of measured pollutant was investigated 452.5 ton/yr of nitrogen and 5.4 ton/yr of phosphorus in Namdae-cheon watershed.
Composting of Compostable Wet Household Wastes Using Waste Newspapers as Humidity Amendment
Yun, Eun-Jin ; Park, Ju-Won ; Seo, Jeoung-Yoon ;
Korean Journal of Environmental Agriculture, volume 19, issue 1, 2000, Pages 32~37
Because the household garbage had high water contents, it is difficult to compost it without an additive. Therefore, this study was performed to investigate possibility of using the waste newspapers as a humidity conditioner for the household garbage composting. The maximum temperature was
in fall and
in winter for composting periods. The seasonal pH value reached around 8.5 after 1 week and then repeated fluctuation at the narrow range in spring and fall, while it was stabilized at the range of
after increasing to 8.5 after 1 week in winter. The water content was reduced little in winter, while decreased significantly in the other seasons. The water content after 8 weeks was 22.2% in spring, 47.6% in summer, 25.5% in fall and 72.5% in winter. The mass was reduced rapidly during the first week of each season, but it did not show much decrease. The volume reduced after 8 weeks to 59%, 32%, 27%, and 34% in spring, summer, fall and winter respectively. Organic matter content decreased over the four seasons. Nitrogen contents were in the range of 0.7% to 2.2% during the four seasons. The contents of inorganic compounds based on dry matyter were in the range of
. Concentration of heavy metals(Hg, Cd, Pb, Cu, Cr, Zn, As) based on dry matter were less than the limiting value of the by-product compost.
Effect of Cow Manure Originated from the Clay Mineral Feeding on the Growth of Zea mays Gk 729
Kim, Jeong-Gyu ; Lee, Sang-Hwan ; Lee, Chang-Ho ; Yoon, Yong-Man ; Son, Yong-Suk ; Lim, Soo-Kil ;
Korean Journal of Environmental Agriculture, volume 19, issue 1, 2000, Pages 38~43
This study was conducted to examine the effects of cow manure originated from the clay mineral (porphyrite, zeolite and bentonite) feeding on the growth of Zea mays GK729. CEC of the manure after bentonite, zeolite, and porphyrite feeding were 147.5, 137.0, and 114.0 cmol/Kg, respectively. These values were higher than that of non-mineral treated manure, 107.5 cmol/Kg. After 3 month growing, there was significant difference among treatment in the biomass prodcution and the content of minerals in plant tissue of Z. mays, but the physico-chemical properties of soils were not showed significant difference. For these results suggested that the clay mineral enhanced the grwoth of Z. mays according to the unknown mechanism, the further studies on the physiological changes will be needed.
Processing Method and Feed Value of Food Wastes as Swine Feed Resources
Jung, Woo-Jin ; Lee, Jeong-Chae ; Kim, Tae-Hwan ; Lim, Kye-Taek ;
Korean Journal of Environmental Agriculture, volume 19, issue 1, 2000, Pages 44~50
This study was carried out to get the basic data on the efficient processing method of food wastes for utilizing as the resources of swine feeds composition, mineral and toxic elements of food waste were estimated in relation to the steps of processing and fermentation with MS (Miraculous soil-bacteria) microorganism complex. The chemical composition of food wastes was largely varied according to disposing sites, collection time and season. Offensive odor was reduced by anaerobic fermentation with MS microorganism complex. Food wastes fermented with MS microorganism complex have high contents in crude protein (24.1% D.M) and crude fat (12.9% D.M). Mineral composition was to be relatively well balanced compared to other plant or animal feed resources. Particularly the content of sodium was slightly higher than that of grains or agricultural byproducts. In food wastes fermented with MS microorganism complex, heavy metals such as Hg, As or F were not detected. Pb or Cd were detected in small quantities but their levels were below the dose s-permitted feeding standard of permitted dose in feeding standard. These results indicated that food wastes could be efficiently used for the resources of swine feeds through proper processing and fermentation.
Material Balance and Properties of Compost during Composting of Household Food Wastes Blended with Waste Newspapers
Han, Jong-Phil ; Park, Ju-Won ; Seo, Jeoung-Yoon ;
Korean Journal of Environmental Agriculture, volume 19, issue 1, 2000, Pages 51~57
Waste newspapers was used as an amendment to adjust the moisture of household food wastes for composting. The mixture of household food wastes and waste newspapers was composted in an especially designed small home composter, where the early fed composting materials were discharged early. The temperature inside composting materials was influenced very much by that of outside, because the composter was not insulated. Accordingly, the higher the outside temperature was, the higher the decomposition rate was. The temperature inside composting materials did not reach to optimum, because the amount of composting materials added in the composter everyday was too little, and it caused too high water content of discharged compost after 15 weeks. Therefore, it was required that the composter must be insulated to maintain the higher temperature. The inorganic compounds
and heavy metals(Zn, Cu, Cr, Cd, Hg, As) were accumulated obviously in produced compost, when dry recycled compost was reused as the amendment for adjusting the moisture.
Influence of low dose
radiation on the physiology of germinative seed of vegetable crops
Kim, Jae-Sung ; Lee, Eun-Kyung ; Back, Myung-Hwa ; Kim, Dong-Hee ; Lee, Young-Bok ;
Korean Journal of Environmental Agriculture, volume 19, issue 1, 2000, Pages 58~61
This study was conducted to determine the effect of low dose
on the germination rate and physiology of germinative seeds of welsh onion ( Allicm fistulosum L. cv. Sukchangwoidae ) and spinach ( Spinacia oleracea L. cv. Chungrok ). The germination rate of irradiation group was much higher than that of the control. Especially it was noticeably higher in 1 or 2 Gy irradiation groups in the sowing spinach seeds on paper towel. On the welsh onion, the germination rate of the 1 Gy irradiation group increased by 17% compared to that of the control. Ion leakage from seeds irradiated with low dose of
was decreased compared to that from the control especially at the early stage of incubation when examined by means of electric conductance. This tendency was confirmed in seeds of welsh onion and spinach. Starch hydrolysis was stimulated by
irradiation in welsh onion. Furthermore
irradiation was beneficial to keeping the vitality of seeds as determined through decarboxylation of glutamic acid.
Rhizome Rot incidence of Platycodon grangiflorus as Influenced by the Soil Chemical Properties and Microbial Flora
Lee, Young-Han ; Kim, Jong-Gyun ; Park, Sang-Ryeol ; Choi, Yong-Jo ; Cho, Soo-Jeong ; Yun, Han-Dae ;
Korean Journal of Environmental Agriculture, volume 19, issue 1, 2000, Pages 62~66
This study was conducted to determine the soil chemical properties and microbial flora of platycodon and their effect on rhizome rot incidence. Sampling sites were Keochang 4, Kimhae 7, Haman 6, Chinju 6 and Koseong 3 fields in Kyongnam province and Hongcheong 6 fields in Kangwon province. The root disease incidence rate was in the order of Haman 56.8%, Hongcheon 52.5%, Kimhae 36.7%, Koechang 35.3%, Chinju 32.3%, Koseong 30.0%. The yield at the Chinju 36.17 Mg/ha was higher than that of Koseong 25.00 Mg/ha, Kimhae 13.57 Mg/ha, Koechang 11.75 Mg/ha, Haman 9.50 Mg/ha, Hongcheon 5.24 Mg/ha. The soil K,
content and EC value of injury root were higher than those of normal root. The root CaO content was positively correlated with yield
. The Fe and Zn content of normal root were higher than those of injury root, while the T-N,
content of normal root were lower than those of injury root. The population of bacteria, actinomycetes and bacteria/fungi ratio increased in soil of normal root, but that of fungi decreased.
Characteristics of Continuous Culture and Soil Texture and their Effect on Growth and Yield of Platycodon grangiflorus
Lee, Young-Han ; Cho, Ju-Sik ; Choi, Yong-Jo ; Song, Geun-Woo ; Kim, Min-Keun ; Yun, Han-Dae ;
Korean Journal of Environmental Agriculture, volume 19, issue 1, 2000, Pages 67~71
This study was conducted to determine the characteristics of continuous culture and soil texture and their effect on growth and yield of platycodon. The continuous cropping year was treated from 2-years old to 8-years old. The continuous cropping year was correlated with root weight
and root disease incidence rate
. The T-N,
and MgO content of root were yearly decresed and those of injury roots were higher than those of normal roots. The 2-years old platycodon was treated different soil texture(Loamy sand, Sandy loam, Silt loam, Clay loam). The shoot weight 10.38g, root diameter 1.34cm, root height 16.8cm and root weight 5.46g at silt loam were higher than other soil texture.
Neutralization Assessment of
on Acidity of Rainwater in Korea
Lee, Jong-Sik ; Lee, Kyu-Seung ;
Korean Journal of Environmental Agriculture, volume 19, issue 1, 2000, Pages 72~74
This study was carried out to assess the neutralization ability of
on acidity of rainwater in Korea. The rainwater was collected at Suwon, Ansung and Taean area for six months from May to October in 1998. Rainwater samples were analyzed chemical composition and calculated its theoretical pH. As the results, theoretical acidity which calculated by
in Suwon, Ansung and Taean area were higher 7.9, 8.7, and 6.5 times than measured acidity, respectively.
more contributed on neutralization of rainwater acidity than
. In case of
its effect on neutralization of rainwater acidity was higher in Suwon than Ansung and Taean area.
Seasonal Variations in Soil Solution Chemistry under Larix leptolepis, Pinus Koraiensis, and Quercus mongolica stands
Ryu, Soung-Ryoul ; Son, Yo-Whan ; Joo, Yeong-Teuk ; Jin, Hyun-O ; Oh, Jong-Min ; Jung, Duk-Young ;
Korean Journal of Environmental Agriculture, volume 19, issue 1, 2000, Pages 75~79
To investigate seasonal variations of soil solution chemistry, samples were collected from zero tension lysimeters in O, A, and B horizons of 26-year-old Larix leptolepis. Pinus koraiensis and Quercus mongolica stands in Kwangju, Kyunggi Province from September, 1996 through June. 1999. Potassium,
concentrations increased in October and November concurrent with inputs of fresh litterfall and twigs. Sodium,
concentrations increased in March and April concurrent with the yellow sand effect. Potassium concentration showed the highest variation among ions, and
concentration showed positive correlations with
concentrations. Soil solution pH decreased while
concentrations increased during the study period. If our data reflects long term trends. then
concentration in the O horizon will reach the toxic level (0.180 meq/l) within 10-20 years depending on species.