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作 者 ：郭江峰，孙锦荷，李兴明

期 刊 ：核农学报 1995年 9卷 01期 页码：0-0

关键词：抗蚜威；土壤；吸附；解吸附；

Keywords:pirimicarb, soil, adsorption, desorption,

摘 要 ：研究了１４Ｃ－抗蚜威在８种土壤中的吸附解吸附行为。结果表明，不同土壤对该杀虫剂的吸附能力差异很大，吸附率低的仅为１３．１６％，高的达８７．７５％。同种土壤对抗蚜威的吸附量随农药的浓度增高而增大，但在一定浓度范围内，吸附量几乎不受抗蚜威浓度的影响。根据研究结果建立了土壤基本理化性质对吸附率综合影响的多元回归方程（达显著水平），并找出了影响吸附率关键因子：ｐＨ和粘粒含量。这两者分别与吸附率呈极显著负相关和极显著正相关。１４Ｃ－抗蚜咸在土壤中的吸附平衡不仅可用Ｆｒｅｕｎｄｌｉｃｈ等温方程描述，也可用Ｌａｎｇｍｕｉｒ等温方程描述。土壤吸附的抗蚜威会发生解吸附作用，解吸率也受土壤性质影响，同样也可用多元回归方程描述

Abstract:C-pirimicarb was used to study its adsorptio-desorption bebavior in 8 kinds of soils。The results indicated that there were significant differences in its adsorptiou with differentkinds of soil.The lowest adsorption percentage was only 13.16%and the highest one was87.75%,The amount of allsorption in the same kind of soil increased with the concentratiouof pesticide, but concentration had little influence on the adsorption within the certain rangeof concentration,Multiple linear regression equation was develolped for predlctiou of adsorp-tion and determineation of the relative importance of the soil parameters,It was significantthat the key factors,soil pH and clay content were negatively and positively correlated withthe adsorption respectively.The adsorption equilibrium of pirimicarb in soils could be welldescribed by both the Freundlich isotherm and the Langmuir isotherm,The adsorbed 14C-pir-imicarb,could desorb from soil and its desorption was aiso influenced by soil properties de-scribed by multiple linear regression equation.

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