丙环唑在香蕉和土壤中的消解动态及残留安全性评价  

Residue dynamics of propiconazole in banana and soils

作　　者：刘燕菁[1] 范玉[2] 张旭光[1] 李兴蓉[3] 郑永权[2] 

机构地区：[1]中国农业大学农学与生物技术学院,北京100193 [2]农业部农药化学与应用重点开放实验室中国农业科学院植物保护研究所,北京100193 [3]北京金都园林绿化有限责任公司,北京100193

出　　处：《植物保护》2010年第2期109-111,115,共4页Plant Protection

基　　金：国家重点基础研究发展计划("973")项目(2009CB19006);国家科技支撑计划课题(2006BAD08A03);粮食丰产工程(2006BAD02A16)

摘　　要：采用田间试验方法研究丙环唑在香蕉和土壤中的残留动态。超高效液相色谱-串联四极杆液质联用法进行(UPLC-MS/MS)定量定性分析。丙环唑在香蕉中的平均回收率为81.9%～100.2%;在香蕉全果中的平均回收率为72.8%～103.6%;在土壤中的平均回收率为81.9%～94.6%。动态结果表明:丙环唑在香蕉全果中比在土壤中消解快,其消解半衰期分在香蕉全果和土壤中分别为13.9d和23.3d。在香蕉上按照推荐剂量最多施药2次,采收期距最后一次施药40d,香蕉果肉中丙环唑残留量小于0.011mg/kg。低于中国规定的最高残留限量(MRL,0.1mg/kg),说明该药为低残留、易消解农药。A field experiment was conducted to reveal the dissipation rates and residue dynamics of propiconazole in banana and soils, and the propiconazole was determined by UPLC-MS/MS. The average recoveries of propiconazole were 81.9%-100.2% in banana, 72.8%-103.6% in banana whole fruits and 81.9%-94.6% in soils. Propiconazole was degraded more rapidly in banana whole fruits than in soils. The half-life times in banana whole fruits and soils were 13.9 d and 23.3 d, respectively. When the banana was treated with propiconazole 20% ME at recommended dose for twice, on the 40th day after the last application, the final residue of propiconazole in banana was below 0. 011 mg/kg, which was lower than the maximum residue limit （MRL, 0.1 mg/kg） of China. These results suggested that propiconazole is an, easily dissipated pesticide with low residues.

关 键 词：丙环唑 超高效液相色谱-串联四极杆液质联用 香蕉 土壤 残留 

分 类 号：S481.8[农业科学—农药学]