[Objective] The paper was to explore the residual dynamics and degradation rule of high concentration carbendazim in natural condition.[Method] The carbendazim solutions with mass fractions of 0.2% (recommended concentration), 0.4% (2 times of the recommended concentration) and 1.0% (5 times of the recommended concentration) were sprayed on plant leaves, and the residual amount of carbendazim in natural condition was determined. The dynamic models of carbendazim residues under 3 concentrations were also studied.[Result] The degradation of carbendazim under recommended concentration was accorded with Kinetic model for degradation, but the degradation Kinetic model for samples under 2 times and 5 times concentration appeared dissimilation. The residue of carbendazim on plant was affected by absorption capacity of plants and weather conditions. The absorption capacity was affected by application concentration and growth condition of plant, higher concentration application and slow growth stage of plant were not conducive to the absorption of carbendazim; weather condition was mainly referred to temperature and humidity, higher temperature and dry weather were not conducive to the degradation of carbendazim.[Conclusion] The paper provided theoretical basis for guiding the application of carbendazim under different growth stages of crops and different weather conditions in agricultural production.
[Objective]The research aimed to discuss the influence of each factor in the combination of Ca(ClO)2 and O3 on removing carbendazim residue from kumquat.[Method]By using Box-Behnken response surface methodology(RSM),the influences of initial concentration of carbendazim,soaking time of Ca(ClO)2 solution,soaking time of O3 water and Ca(ClO)2 concentration on the removing of carbendazim residue from kumquat were studied.[Result]The effect of each factor on the removing of carbendazim residue from kumquat was soaking time of O3 wastersoaking time of Ca(ClO)2 solutioninitial residues of carbendazimCa(ClO)2 concentration.By fitting the experimental result,the quadratic polynomial model of relationship between carbendazim residue and the above each factor was obtained.The verified experimental result showed that the model had the high precision.[Conclusion]The model could be used to guide using the appropriate soaking time of Ca(ClO)2 solution,soaking time of O3 water and Ca(ClO)2 concentration under the certain initial concentration and residue limit value of carbendazim,which guaranteed obtaining the expected residue limit value of carbendazim.
'/%3e%3cuse xlink:href='%23a' transform='rotate(23.036 .093 25.536)'/%3e%3cuse xlink:href='%23a' transform='rotate(45.87 1.273 16.18)'/%3e%3cuse xlink:href='%23a' transform='rotate(69.945 .996 12.078)'/%3e%3cuse xlink:href='%23a' transform='rotate(20.66 -19.689 31.932)'/%3e%3c/svg%3e)
