4种植物生长延缓剂在‘库尔勒香梨果实的残留测定及风险评估

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中图分类号：S661.2 文献标识码：A

Abstract：【Objective】 Study onthe dietary risk of diferent plant growth retardants on‘Korla Fragrant Pear’fruits and assessmentoftheirsinglefactorpolutionrisk index，aiming toprovideatheoreticalbasis forthescientificapplicationofplant growth retardants in fragrant pears.【Methods】Theresiduesoffour plant growth retardants（paclobutrazol，uniconazole， chlormequat chloride，mepiquat chloride）were determined using liquid chromatography-masspectrometry.【Results】Under the maximum treatmentlevelofeach reagentconcentration gradient，theresiduesof paclobutrazol，uniconazole，chlormequat chloride and mepiquat chloride were O. 209mg⋅kg-1 ，0. 002mg⋅kg-1 ，0 .237mg⋅kg-1 and 0. 122mg⋅kg-1 ，respectively. The four plant growth retardants did not exceed the maximum residue limits （paclobutrazol 0.5mg⋅kg-1 ，uniconazole 0. 3 mg⋅kg-1 ）specified in China’s GB2763-2021 ‘Maximum residue limits for pesticides in food'.【Conclusion】 Through the analysis of singlefactorenvironmentalpolltionindexand dietaryrisassessment，thefruit pollutionindexofpaclobutrazoland uniconazole waslwerthanthethresholdandthedietaryriskwasatanacceptablelevel.Theresultsprovidedscientificbasis for the rational use of plant growth retardants in the safe production of‘Korla Fragrant Pear'.

Key words：plant growth retardant；Korla fragrant pear；residual；fruit polution；dietary risk assessment

‘香梨’（以下简称‘香梨’）主要种 产建设兵团，是极具地域性的优良品种，因独特的植在巴音郭勒蒙自治州、阿克苏地区及周边生 口感及丰富的营养，备受消费者喜爱[1]。（剩余6595字）