| 功夫在大豆及土壤中的残留动态研究 |
| 摘要点击 696 全文点击 756 投稿时间：1996-04-04 |
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| 中文关键词 功夫 大豆 残留 气相色谱法 |
| 英文关键词 eyhalothrin soybeen residue GLC soil |
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| 中文摘要 |
| 为了制订功夫在大豆上安全使用标准,采用田间试验方法研究了功夫在大豆茎叶和土壤中的残留动态,应用GLC法测定了功夫在青豆、成熟大豆和土壤中的残留量。2年的试验结果表明,功夫在大豆茎叶和土壤中消失较快,其半衰期分别为6.6-7.1 d和6.7-11.6 d.施药量(有效成分)为15g/hm2,施药2次,收获时土壤中的残留量为0.008 mg/kg;在青豆和成熟大豆中残留量均低于最低检测浓度(0.004 mg/kg)。功夫属易降解农药(T1/2<30 d),按推荐剂量(7.5 g/hm2)使用2次是安全的。 |
| 英文摘要 |
| In order to make up the standards for safe use of cyhalothrin on soybeen, a field experiment was conducted to study the residual dynamics of cyhalothrin in soil and leaves of soybeen. The residues of cyhalothrin in green soybeen, mature soybeen and soil were determined by GLC. Results of two years'study showed that cyhalothrin dissipated rapidly from leaves and soil. Its half lives in leaves and soil were 6.6-7.1 and 6.7-11.6 days, respectively. The soybeen field was sprayed twice with cyhalothrin at a rate of 15 g a.i./hm2. At harvest, the final residues of cyhalothrin in soil was 0.008 mg/kg, the residues of cyhalothrin in green and mature soybeen were all below their detectable limits(0.004 mg/kg). Cyhalothrin is a pesticide of easy dissipation (T1/2<30 d). It is safe if applied twice at a recommended rate (7.5 g a.i./hm2). |
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