氯吡脲在猕猴桃中的残留动态及影响因子研究

Study on the residual dynamics and influencing factors of forchlorfenuron in kiwifruit

中文关键词:  猕猴桃  氯吡脲  残留动态  消解率

英文关键词:kiwifruit  forchlorfenuron  residue dynamics  degradation rate

中文摘要:

      目的 研究不同品种、不同浓度和不同地理情况下氯吡脲在猕猴桃中的消解规律, 并分析氯吡脲在猕猴桃中消解的影响因子。方法 在周至县范围内, 根据不同地理情况、不同猕猴桃品种设立了6个田间试验, 通过密集采样, 考察不同施药浓度氯吡脲在猕猴桃中的残留动态、消解率、半衰期及安全使用间隔期, 并分析了施药浓度、生长时期、不同品种和不同生产区域对残留量和消解率的影响。结果 氯吡脲符合非线性一级动力学消解模式; 不同的处理浓度在猕猴桃成熟后均无残留; 平均半衰期为11.9 d, 最大安全间隔期为75 d; 施药浓度、不同生长时期对氯吡脲残留量有显著影响, 不同区域对氯吡脲残留量无显著影响; 不同生长时期对氯吡脲消解率有显著影响; 施药浓度、不同地理类型、不同品种对氯吡脲消解率无显著影响。结论 由于猕猴桃生长周期较长, 只要严格按规定剂量使用, 氯吡脲可安全地用于猕猴桃生产, 不会形成残留危害。

英文摘要:

      Objective To study the digestion of forchlorfenuron in kiwi in different varieties, different concentrations and different geographical conditions, and to analyze the influencing factors of forchlorfenuron digestion in kiwi. Methods In Zhouzhi County, 6 field trials were set up according to different geographical conditions and different kiwi varieties. Through intensive sampling, the residual dynamics, digestion rate, half-life and safe use interval of forchlorfenuron at different application concentrations were investigated in kiwifruit. The effects of pesticide concentration, growth period, different varieties and different production areas on residues and digestion rates were analyzed. Results Forchlorfenuron fitted the nonlinear first-order kinetic digestion model. There was no residue at different concentrations after kiwifruit matures. The average half-life was 11.9 d and the maximum safe interval was 75 d. The application concentration and different growth periods had a significant effect on the forchlorfenuron residue, and the different regions had no significant effect on the forchlorfenuron residue. Different growth stages have significant effects on the rate of forchlorfenuron digestion. The application concentration, different geographical types, and different varieties had no significant effect on the forchlorfenuron digestion rate. Conclusion Due to the long growth period of kiwifruit, as long as it is used strictly according to the prescribed dose, forchlorfenuron can be safely used in kiwi fruit production without forming a residual hazard.