有機鹽素劑農藥의 作物에의 吸收 殘留에 關한 硏究 = Residue of Organochlorine Pesticides in Soils and Absorption in Crops

다국어 초록 (Multilingual Abstract)

In order to study the residual amounts of absorbed organochlorine pesticides in vegetables, heptachlor and endrin were sprayed before sowing the seeds in the station. The experimental study is primarily concerned with the absorption in lettuce and garland chrysanthemum.
The summarized results were as follows:
1) In this study, the recovery tests of the gas chromatographic analysis showed 96.8~98.6% in the soil and 96.4~97.8% in the vegetables.
The densities which given doses were 1.5 ug of heptachlor, heptachlor epoxide and 2.5 ug of endrin respectively.
2) The period indicating maximum level of absorption of pesticides differs according to the amount of pesticides sprayed in the soil.
Heptachlor and heptachlor epoxide: On the soil applied 2,4 and 6kg per lOa., the absorption level in lettuce reached the maximum around 24 days after germination and 31 days after for garland chrysantemum.
Endrin: The maximum level was achieved in lettuce around 3Idays after germination under application of 2kg of endrin per 10a. and around 24 days after for 4 and 6kg per 10a. respectively. For garland chrysanthemum, the period showing the maximum level of residual endrin varied by the amount of application per area, that is 24 days under 2kg, 38 days under 4kg and 31days under 6kg of application per 10a.,
3) The residual amount in soil and vegetables were proportional to the pesticides application.
Heptachlor plus heptachlor epoxide in the soil showed 0.4592, 0.6812, and 0.8107 ppm and 0.5371, 0.7357 and 1.2451 ppm in endrin on 2,4 and 6kg of pesticide application per 10a. for 52 days.
The average residual level in lettuce were 0.0167, 0.0237 and 0.0251 ppm in heptachlor plus heptachlor epoxide, and 0.0151, 0.0240 and 0.0259 ppm in endrin in 2,4 and 6kg application of pesticides for 10a. respectively for 52 days.
In garland chrysanthemum, 0.0157, 0.0237 and 0.0270 ppm in heptachlor plus heptachlor epoxide, and 0.0160, 0.0343 and 0.0408 ppm in endrin were detected in each pesticides application area through the experimental period of time.
4). The ratio of residual pesticides in vegetables and soil were estimated to be 3.3% in heptachlor plus heptachlor epoxide, 2.6% in endrin in lettuce, and 3.4% and 3.6% in garland chrysanthemum in heptachlor plus heptachlor epoxide and endrin respectively.
5). For a comparative study, the amount of vegetables necessary was sampled at the market in Seoul city in March, May and July, 1973, and heptachlor, heptachlor epoxide and endrin were analyzed by the same method.
The results are as follows:
i) Heptachlor plus heptachlor epoxide: In lettuce, the residues were 0.0045 ppm (sampled in March), 0.0039 ppm(May) and 0.0003 ppm(July). In garland chrysanthemum were 0.0072 ppm (March), 0.0044 ppm (May) and 0.0003 ppm (July).
ii) Endrin: In lettuce, 0.0116 ppm (sampled in March), 0.0018 ppm (May) and 0.0003 ppm (July) were detected.
In garland chrysanthemum, 0.0108 ppm (March), 0.0019ppm (May) and 0.0003ppm (July) were determined.
There level of pesticides residue in vegetables in market were extremely low in comparison with the level in the same vegetables in Japan.
However, as long as a certain level of the residues of organochlorine pesticides exists, care should be taken for foods especially vegetables etc.
In addition, it should be emphasized to prevent any hazards due to food contamination. The continous inspection and research will be desirable.

목차 (Table of Contents)

• Abstract
• I. 緖論
• II. 實驗方法
• 1. 實驗栽培
• 2. 試料採取
• 3. 有機鹽素劑의 測定
• III. 實驗結果및 考察
• IV. 結論
• 參考文獻