大氣公害가 養蠶에 미치는 影響에 관한 硏究 : 人工 飼料中의 카드미움 濃度와 家蠶形質과의 關係 Relation between Silkworm larval characters and the levels of cadmium density in diets = Studies on the Effects of Atmospheric Pollution on Sericulture

다국어 초록 (Multilingual Abstract)

Performed to study on effect of economic characters and quantity of Cd in silkworm body by feeding artificial diet which aded Cd per density to all age silkworms.
The results were as follows:
1. Each treated parts was a little longer than control on silkworm larval duration.
2. Growing condition of 40 ppm on the 7th day after commencement incubation was uneven and found out around 80% of 1st instar-silkworm larvae which almost didn't grow at ones of 80 ppm.
3. Maximum weight of the 5th instar, pupation ratio, weight of cocoon, weight of cocoon layer and cocoon layer ratio of parts of 1,10, and 20 ppm was a lettle higher than control, but only ones of 40 ppm was lower than those.
And found out it ws chronic toxicity.
4. Each treated parts on eclosion period was longer than control.
Expecially non-eclosion ratio of 40 ppm was 30%.
5. The safe level density of Cd in diet was 20 ppm.
6. Toxicity will be occurred when Cd contents in is more than 5 PPM in silkworm body.

목차 (Table of Contents)

• Ⅰ. 緖 言
• Ⅱ. 材料 및 方法
• Ⅲ. 實驗結果
• Ⅳ. 考 察
• Ⅴ. 摘 要
• Ⅵ. 參考文獻