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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 16, Issue 4 - Dec 1997
Volume 16, Issue 3 - Sep 1997
Volume 16, Issue 2 - Jun 1997
Volume 16, Issue 1 - Mar 1997
Selecting the target year
Bioremediation Bentazon using Minari(Oenanthe stolonifera DC.) Plant.
Shin, Joung-Du ; Lee, Myung-Sun ;
Korean Journal of Environmental Agriculture, volume 16, issue 3, 1997, Pages 207~211
Laboratory experiments were conducted to the potential ability of bioremediation with bentazon such as determining the absorption, translocation, and metabolism of
in minari after foliar applications. The absorption and translocation of
were compared when applied to foliar of minari. In foliar applications, 21% was observed in treated leaves, 66% remained in water extracts of leaf surfaces, and 13% was found in the epicuticular wax layer after 2d. Translocation of the herbicide from treated leaves to roots was very low(79 to 9%). Analysis of methanol-soluble extracts of
indicated that more than 60% of the foliarapplied herbicide was metabolized in all plant sections after 2d. However, 77% or more of the bentazon was degraded in roots and shoots 2d after root absorption. The major metabolite in these experiments was an unknown compound that was less polar than bentazon and 6- and 8-hydroxy bentazon.
Variation in Metalaxyl and Streptomycin Sulfate Resistance of Isolates Formed from Single Sporangium of Phytophora infestans
Lee, Yong-Hoon ; Lee, Wang-Hyu ; Lee, Doo-Ku ; Shim, Hyeong-Kwon ;
Korean Journal of Environmental Agriculture, volume 16, issue 3, 1997, Pages 212~215
Parent isolates and
progenies from single-sporangium of Phytophthora infestans were investigated for the acqusition of metalaxyl and streptomycin sulfate(SM) resistance. The parent isolates, KM10, U6, CDB6 showed resistance to metalaxyl, and F817, DNC303, DN107 to SM. Especially, the average mycelial growth of
progenies of F817, CDB6, JD1 was more than 51% than parent isolates on 25ppm metalaxyl added V-8 juice agar, whereas those of KM10, U6, JD1 were extended more than 51% similar on 200ppm SM treatment. They acquired resistance on the basis of the standard in this experiment. There were positive correlations between parent isolates and
colonies in resistance. The
colonies obtained from parent isolates showing above interinediate resistance on metalaxyl amended agar acquired much resistance.
Effects of Deficiencies in Nutritional Elements on the Radiosensitivity of Rice Plant
Kim, Jae-Sung ; Shin, In-Chul ; Lee, Young-Keun ; Lee, Kyu-Seung ;
Korean Journal of Environmental Agriculture, volume 16, issue 3, 1997, Pages 216~219
Thirty day old rice seedlings, Ilpoom and Taeback variety, grown under deficient condition of several elements in nutrition solution of sand culture were exposed to 20Gy, 40Gy, 80Gy of gamma ray
to study the effect of their radiosensitivity. The results obtained are summarized as follows : Plant height and fresh weight of nutrient deficient rice plants were far less than those of control. The effect was different with nutrient element and rice variety, as show increasing effect of radiosensitivity in the Ilpoom variety was high in the Fe deficient whereas that of Taeback was high in the P deficient. Growth inhibition of rice plant irradiated with 20Gy was highly occurred in the Fe and Zn deficient plot in Ilpoom variety and P and Zn deficient plot in Taeback variety. In 80Gy irradiated group, radiosensitivity of rice plant was high in the P and Ca deficient plot of both Ilpoom and Taeback variety.
Effects of Municipal Sewage and Industrial Wastewater Sludge Composts on Chemical Properties of Soil and Growth of Corn Plant
Lee, Hong-Jae ; Cho, Ju-Sik ; Lee, Won-Kyu ; Heo, Jong-Su ;
Korean Journal of Environmental Agriculture, volume 16, issue 3, 1997, Pages 220~226
To study the possibility of agricultural utilization of the municipal sewage and the industrial wastewater sludges, the chemical properties of soil, the growth response of corn plant and uptake of inorganic nutrients in plant tissues were investigated by application of the composts made of the sludges to the pots at the rate of 2,000kg/10a. The contents of organic matter, T-N,
and K in soil were increased by application of the composts. Each heavy metals contents in soil were increased very slightly by application of the composts. The fresh weights of corn plant were increased with
at the plot of compost and NPK+composts in comparing with the plot of NPK, respectively. Uptake of N,
, CaO and MgO in stem and leaf of corn plant were increased by applications of the composts.
Effect of Fertilization of UV-B Sensitivity of Cucumber Plant
Bae, Gong-Young ; Lee, Yong-Beom ; Park, So-Hong ;
Korean Journal of Environmental Agriculture, volume 16, issue 3, 1997, Pages 227~232
Visible injury appeared 7 days after ultraviolet-B(UV-B) irradiation, but did not show any significant decline of growth in cucumber plant. However the growth of the first leaves of fertilized plants was suppressed by UV-B irradiation. Especially the most effective growth retardiation appeared when supplied with nitrogen rather than phosphate and potassium. These results suggest that UV-B may play an important role in inhibiting nitrogen metabolism. Therefore we examined the effect of activity of nitrate reductase, and found that the nitrate reductase activity of the first leaves was increased by UV-B irradiation for 7 days and fertilization. We examined the effect of plant hormone on the inhibition of growth in the first leaves. Benzyladenine promoted the growth of discs excised from the first leaves by fertilization and without UV-B, but did not promote the growth of leaf discs from UV-B irradiated plants. We conclude that the UV-B-induced decrease in the growth of the first leaves could be related to reduction in sensitivity to plant hormones.
Water Quality Modeling for Bokha Stream by WASP5 Model
Shin, Dong-Seok ; Kwun, Soon-Kuk ;
Korean Journal of Environmental Agriculture, volume 16, issue 3, 1997, Pages 233~238
WASP5 was applied to evaluate water quality of Bokha stream with 17km of its main stem located in Ichon-city, Kyunggi province in Korea. Boundaries of the stream for the WASP5 were the Jumi bridge, 10 major tributaries and one wastewater treatment system. The stream was divided into 37 segments with about 350m length. The flowrate of the 10 day's average of the stream was obtained from the hydrograph data and the discharge-stage rating curve. Simulated quality constituents included nitrogen, phosphorus, BOD and DO. Monthly records of water quality and loads in 1996 were used for the calibration of parameters of WASP5. Simulation showed high correlations between calculated and observed concentration with monthly runoff ratio in Bokha stream. At downstream boundary, Jumi bridge [Seg.36], similar correlations were appeared. However, simulated concentrations by using annual runoff ratio were somewhat differentiated from those of the observed.
Extraction Method for Paraquat from Soil
Kwon, Jin-Wook ; Kim, Yong-Se ; Choi, Jong-Woo ; Lee, Kyu-Seung ;
Korean Journal of Environmental Agriculture, volume 16, issue 3, 1997, Pages 239~244
To develope more effective extraction methods for paraquat in soil, some modification methods were accomplished in two different types of soil. For extraction of tightly bound-paraquat, conc. HCl 70ml were added with different shaking times, and then
reflux were performed for an hour. In this case, 60 minutes shaking were optimum and recovery were increased more
folds(84.0% in high clay contents soil, but 96.7% in low clay contents soil) and the long-time consuming step, filtration were easily done, with decreasing filtration time were shorter 4.6 folds(ca.
). than general paraquat analytical method(ca.
). And only
digestion with different volume and refluxing time resulted in recovery increasing. Nevertheless, considering analyst's safety, 30ml of
addition and 30 minutes reflux were regarded as optimum condition. Although, Kjeldahl digestion with
showed relatively high recovery, it is not significant statistically. For extraction of loosely bound-paraquat, 0.01, 0.1, 1.0, 10.0M of
of different shaking time. There were no loosely bound residues of paraquat.
Effects of Seed Soaking of Kinetin with Zinc Treatment on
Activity and Free Proline Content during Germination of Rice(Oryza sative L.)
Kim, Sang-Kuk ; Lee, Sang-Chul ;
Korean Journal of Environmental Agriculture, volume 16, issue 3, 1997, Pages 245~248
The study was carried out to elucidate the changes of
activity and free proline content for zinc toxicity in two rice cultivars(Ilpumbyeo and Namchunbyeo) during germination and early growth stages. Plant height in all kinetin treatments was promoted but zinc 120ppm treatment was decreased. Soaking treatment of kinetin
increased germination rate of both cultivars, Ilpumbyeo and Namchunbyeo by 95% and 96% as compared with zinc 120ppm. Chlorophyll content of Ilpumbyeo was higher than that of Namchunbyeo. Activity of
of both rice cultivars was most highest in the 3days after treatment of zinc 120ppm. Free proline content in all rice cultivars of zinc 120ppm treatment was sharply increased at the 3days after treatment of zinc 120ppm. As a result, the effects of kinetin treatment were recognized to promote the plant height and germination rate under zinc toxicity(120ppm) during rice seed germination and early growth stages.
Change of Nutrients and Behaviour of Total Coliforms in the Natural Treatment of Wastewater by Subsurface Flow Wetland System
Yoon, Chun-Gyeong ; Kwun, Soon-Kuk ; Kim, Hyung-Joong ;
Korean Journal of Environmental Agriculture, volume 16, issue 3, 1997, Pages 249~254
The constructed wetland system which is applicable to rural wastewater treatment was examined by pilot plant experiment. Removal rates of nutrients including nitrogen and phosphorus and total coliform were evaluated. The
concentration of the influent was in the range of 91.57 to 275.88mg/l and the effluent concentration was about 40% lower than the influent. The decreasing of the
concentration might be due to volatilization, plant uptake, adsorption onto soil particles, and mainly nitrification. However, generally concentrations of
were increased in the effluents compared to the influent concentrations, which implies that nitrogen components in the system were nitrified. Overall, the average removal rate of the nitrogen was about 5% which seems inadequate as a wastewater treatment system, and this system needs improvement on nitrogen removal mechamism. The removal rate of the phosphorus was quite high and effluent concentration was very low. Reason for high removal rate of the phosphorus might be mainly strong adsorption characteristic onto soil particles. The average removal rate of the total coliforms was about 83%, and main removal mechanisms are thought to be adsorption onto soil and inability to compete against the established soil microflora. From the results of the study, the constructed wetland system needs to be improved in nitrogen removal mechanism for field application.
Removal Efficiency of Pesticide Residues on Apples by Ultrasonic Cleaner
Yoon, Chae-Hyuk ; Park, Woo-Churl ; Kim, Jang-Eok ; Kim, Chung-Hyo ;
Korean Journal of Environmental Agriculture, volume 16, issue 3, 1997, Pages 255~258
In order to determine the removal efficiency of pesticide residues on apples by ultrasonic cleaner, apples(Fuji var.) were artificially treated by dipping in water solution of fenitrothion EC, chlorpyrifos EC and phenthoate EC. The treated apples were washed by the ultrasonic cleaner with water, 30% ethanol solution or 0.2% detergent solution, respectively. The removal efficiency of fenitrothion, chlorpyrifos and phent-hoate by ultrasonicated washing in water for 0.5min. was 39.2%, 32.0% and 50.4%, respectively, but there was a tendency to decrease the removal efficiency of the pesticide residues as the duration of ultrasonicated washing period is increased. The maximum removal efficiency of the pesticide residues washed in the detergent solution was observed by ultrasonicated washing the samples for 5min. and it was recorded as 33.5% ; fenitrothion, 30.1% ; chlorpyrifos and 48.3% ; phenthoate, respectively. However it's appeared that the longer the ultrasonicated washing period in 30% ethanol solution the more pesticides from the apples were removed and the maximum removal efficiency of the pesticides was recorded as 66.2%(fenitrothion ; washed for 15min.), 41.7%(chlorpyrifos ; washed for 10min.), 74.2%(phenthoate ; washed for 10min.).
Changes in Agricultural Irrigation Water Quality in Nam River
Lee, Young-Han ; Kim, Jong-Gyun ; Lee, Han-Saeng ; Cho, Dong-Jin ; Cho, Ju-Sik ; Shin, Yon-Kyo ;
Korean Journal of Environmental Agriculture, volume 16, issue 3, 1997, Pages 259~263
To investigate chemical changes of agricultural water in Nam river used for the basic information. Samples were collected from seven sites along the Nam river and were analyzed for inorganic content from April to September in
. Average value of analyzed inorganic concentrations at seven sampling sites were pH 7.9, COD 7.3mg/l,
14.8mg/l, EC 0.13dS/m,
0.02mg/l. The monthly average value of COD,
showed highest peak in July
. The highest region of average COD,
were Weola pumping station,
: ratio between total equivalant of anions and canon) of Nam river was higher at Weola pumping station than other topography. The EC was positively correlated with
Uptake of Soilmicrobial Metabolites and Allelochemicals in Plant Root System
Kim, M.J. ; Lee, Y.S. ;
Korean Journal of Environmental Agriculture, volume 16, issue 3, 1997, Pages 264~268
Microbial metabolites from rhizosphere soil samples mainly inhabitated by Streptomyces are selectively uptaken into plants. The culture broth of a Streptomyces strain K9301 showed a major metabolite which disappeared in the medium 24hrs after planting of seedlings. This metabolite was selectively uptaken in the rice plants as well as the wheat plants. We identified the targeted metabolite showing a strong UV-absorbing spot at Rf 0.6 on TLC to be 2-aminobenzamide.
Synthesis of Abscisic Acid Analogs and Their Biological Activity on Growth of Rice Seedling
Lee, Sang-Kap ;
Korean Journal of Environmental Agriculture, volume 16, issue 3, 1997, Pages 269~273
This research aims at developing a new plant growth inhibitors related to abscisic acid by means of esterification of (S)-(+)-ABA with p-hydroxy methyl cinnamate and umbelliferone, and testing its biological activity on growth of rice seedlings. The over-all yield of ABA-methyl cinnamate(AC) and ABA-umbelliferone(AC) ester compounds were 83% and 78%, respectively. The growth inhibition activity of these synthetic compounds were shown about 3 to 10 times(AC) and 10 to 30 times(AU) higher than (S)-(+)-ABA.
Pesticide Runoff from Soil Surface by Rainfall
Kim, Kyun ; Kim, Jeong-Han ; Park, Chang-Kyu ;
Korean Journal of Environmental Agriculture, volume 16, issue 3, 1997, Pages 274~284
Pesticide runoff from crop fields is the important concern in environment because it may affect aquatic ecosystem and human. And it is essential to find out the amount of runoff and evaluate the possible effect on aquatic organisms for the human and environmental risk assessment. However, no definite guidelines have been established and related researches are not active in Korea since too many factors were involved in pesticide runoff and it was hard to predict it by using simple data. Therefore, various runoff studies with natural field, simulated rain/field, and computer models were reviewed for the general aspect of experiments and results.