关键词: 土壤, 韭菜, 毒死蜱, 农药降解

Abstract: The highest and lowest critical temperatures for embryo development of pond smelt are respectively reported as 21℃ and 4℃, and favorible temperature as 10—15℃. After organ's formation, embryo develops stronger resistence to high temperature, and the body length of larvae hatched under high temperature is generally shorter. The critical salinity for embryo development is 2.5%, but larvae can live normally under a salinity of 4.5%. The 24hr, 48hr and 96hr TLMs of alkalinity for embryo development are respectively 47.8, 47.2 and 45.4. The toxicity of the same alkaline strengthens with the rise of pH.

Key words: soil, Allium tuberosum, chlorpyrifos, pesticide degradation