| .嘧菌酯在草莓与土壤中的残留动态研究[J].农业环境科学学报,2013,32(4):. |
| 嘧菌酯在草莓与土壤中的残留动态研究 |
| Residual Dynamics of Azoxystrobin in Strawberry and Soil |
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| DOI：10.11654/jaes.2013.04.006 |
| 中文关键词: 嘧菌酯 草莓 残留动态 气相色谱 |
| 英文关键词: azoxystrobin strawberry residual decline GC |
| 基金项目: |
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| 摘要点击次数: 1925 |
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| 中文摘要: |
| 通过田间试验和气相色谱法研究了嘧菌酯悬浮剂在草莓和土壤中的消解动态和最终残留特性。结果表明：草莓和土壤中嘧菌酯添加浓度在0.05~1.0 mg·kg-1范围内，回收率为97.16%~99.78%，变异系数为1.89%~3.67%，最小定量限（LOQ）均为0.02 mg·kg-1；不同施药浓度[225、450 g（a.i.）·hm-2]时，嘧菌酯在草莓和土壤中的消解半衰期分别为3.66～3.96 d和 6.31～8.79 d； 嘧菌酯悬浮剂（250 g·L-1）在草莓上的使用剂量为225 g（a.i.）·hm-2、间隔7 d施药次数不超过3次时，草莓中嘧菌酯的最终残留量为0.17~0.20 mg·kg-1，小于欧美与日本等国规定的最大残留限量（MRL）1.0 mg·kg-1。 |
| 英文摘要: |
| Field trial and gas chromatography were carried out to study residual decline and final residues of azoxystrobin in the strawberry and soil. The results showed that when the added concentration of azoxystrobin ranged from 0.05 mg·kg-1 to 1.0 mg·kg-1, the recoveries changed from 97.16% to 99.78%, and the coefficients of variation varied from 1.89% to 3.67%. Meanwhile, the limit determination of azoxystrobin was 0.02 mg·kg-1. The half-lives of azoxystrobin was 3.66 days to 3.96 days in strawberry and 6.31 days to 8.79 days in soil, respectively. The final residue of azoxystrobin（250 g·L-1） SC was 0.17 mg·kg-1 to 0.20 mg·kg-1 when used in strawberry with the frequency of administration was not more than 3 times, interval of 7 days, and it was less than 1.0 mg·kg-1 that the Maximum Residue Limits（ＭＲＬ） of the U.S., Europe, Japan and other countries. |
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