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이숙희,김창배,박노권,박선도 한국응용생명화학회 1993 한국응용생명화학회 학술발표회 Vol.1993 No.-
This study reports the influence of application of sulphur on the yield and some quality by Chinese cabbage in field experiment. 1. By the application of sulphur fertilizer, the yields of Chinese cabbage were increased about 11∼13 percent compared to control. 2. After harvest, the available sulphur amount in soil was increased, while the soil pH decreased. 3. The accumulation of nitrate in Chinese cabbage leaves was reduced by the sulphur application. 4. The amount of biochemical materials such as water-soluble pectin, phenolic compound, sugar, vitamin C in leaves were increased by sulphur application.
환경차이에 따른 밭토양중 살균제 myclobutanil 의 잔류 및 토양미생물상 변화
최찬규,정재훈,백승화,한성수 한국응용생명화학회 1994 한국응용생명화학회 학술발표회 Vol.1994 No.1
Residue level of myclobutanil[2-p-chlorophenyl-2-(1H-1,2,4-trizol-l-yl-methyl) hexane nitril] and number of soil microorganism were investigated at different environmental conditions such as the sterile and the non-sterile soils, moisture content, pH, temperature, application rate, and soil types under laboratory and field to study the effect of those factors on degradation characteristics of this fungicide and change of microflora in soil. Decomposition rate of myclobutanil was 3.9 times faster in the non-sterile soil than in the sterile soil, 1.6 times in the field than in the laboratory, 1.4 times in the concentration of 10ppm than in that of 20ppm, and 1.2 times in the clay loam soil than in the silty loam soil. Degradation rate of myclobutanil was the fastest at pH 9.0 among the tested pHs and the latest at pH 5.5. Degradation rate of myclobutanil was in order of 27℃ > 37℃ > 17℃. Otherwise, the effect of soil water content on myclobutanil degradation was found not clear. Number of microorganism in the non-sterile soil was remarkedly more than that in the sterile soil. Numbers of microbes were not significantly different between treatment plot and non-treatment plot of myclobutanil at the different conditions of soil moisture content, pH, temperature and soil type. Numbers of fungi and total microbes were more in the treatment than in the non-treatment of myclobutanil at field test but the same trends were not found at laboratory test. Within non-treatment of myclobutanil, numbers of microbes were not significantly different under the various condition of pH, application rate, and soil type in laboratory and upland field. The number of bacteria were more in 60% moisture content of water holding capacity than in 40% and the number of fungi were more in 17℃ of soil temperature than in 37℃. Within the application plot of myclobutanil, numbers of microbes were not significantly different at various pH in laboratory and upland field. The number of bacteria and total microbes were more in 80% moisture content of water holding capacity than in 40% and 60% and actinomycetes were more at 27℃ in the clay loam soil than at 17℃ in the silty loam soil.