摘要
利用气相色谱质谱联用检测技术,建立了戊唑醇和嘧菌酯在水稻（Oryza sativa）地上各部位的残留分析方法;并通过田间试验,研究了戊唑醇和嘧菌酯在水稻植株中的消解行为及在水稻不同部位的残留累积分配特征.在吉林、浙江和广西3 地的田间试验结果表明,戊唑醇和嘧菌酯在水稻植株中的残留消解动态规律符合一级动力学方程,在水稻植株中的消解半衰期分别为4. 68～5. 68 和4. 65～6. 08 d.按推荐剂量（以有效成分计）168. 8 g·hm-2和1. 5 倍推荐剂量253. 2 g·hm-2在水稻植株上分别喷施750 g·L-1戊唑醇·嘧菌酯水分散粒剂2 次和3 次,戊唑醇和嘧菌酯在水稻各部位的累积分配特征显示,吉林地区2 种农药在水稻植株不同部位的残留分配比由大到小依次均为稻壳、茎秆和稻米,浙江和广西地区2 种农药在水稻植株各部位的残留分配比由大到小依次为茎秆、稻壳和稻米.
Field experiments were conducted in Jilin, Zhejiang and Guangxi provinces for determination of residual tebu-conazole and azoxystrobin in tissues of rice （Oryza sativa） using GC-MS and dissipation dynamics, accumulation and dis-tribution of tebuconazole and azoxystrobin in different parts of rice explored. Results show that dissipation dynamics of tebuconazole and azoxystrobin residues in the plants fitted the first-order kinetic equation, and dissipation half-life of tebu-conazole and azoxystrobin in the plants was 4. 68-5. 68 and 4. 65-6. 08 d, respectively. When 168. 8 g·hm-2（recommen-ded dosage） and 253. 2 g·hm-2（1. 5 times the recommended dosage） of 750 g·L-1 tebuconazole and azoxystrobin waterdispersible granules were sprayed twice and thrice, respectively, the accumulation and distribution of tebuconazole andazoxystrobin in tissues of the plants was characterized by the order of husk 〉 straw 〉 rice in Jilin and the order of straw 〉husk 〉 rice in Zhejiang and Guangxi.
出处
《生态与农村环境学报》
CAS
CSCD
北大核心
2014年第2期246-251,共6页
Journal of Ecology and Rural Environment
基金
农业部农药登记残留试验项目(2012F419)
关键词
戊唑醇
嘧菌酯
水稻
累积
分配
tebuconazole
azoxystrobin
Oryza sativa
accumulation
distribution
