抗蚜威残留动态及示踪动力学模型研究

采用同位素示踪方法，以3个不同抗蚜威剂量对青菜进行喷施，研究其在青菜-土壤系统中的残留动态。试验显示，在不同浓度处理下，抗蚜威在青菜中的消解规律大致为前期较快，后期较慢：浓度高时较快，浓度低时较慢。常规剂量处理的试验末期，土壤中结合残留物占初始量的比例高达60．75％左右。抗蚜威在青菜-土壤系统中的残留动态变化，能较好的用指数模型和示踪动力学二分室模型描述。

Study on Residue Dynamics and Tracer Kinetic Model of Pirimicarb

The radioisotope tracing techniques was used to study the tracer kinetic model on residues of pirimicarb with three different dosages in greengrocery and soil system. When pirimicarb was applied, disappearance of 14C-residues in green was very rapid in the early stage, and then slower, rapid in the high concentra tion, slower in the low concentration. At the end of the study, the quanitty of the bound residues in pro portion to the initiation was about 60.75%. The dynamics of pirimicarb in greengrocery/soil system could be well described by exponent equation and two -compartment model.