• 关键词：¹⁴C-辛硫磷  农药残留  小麦  蒸腾  光解  植物代谢

• 基金项目：

• 朱树秀
• 新疆农业科学院原子能应用研究所,乌鲁木齐

• 姚鹰
• 新疆农业科学院原子能应用研究所,乌鲁木齐

• 吴晓英
• 新疆农业科学院原子能应用研究所,乌鲁木齐

• 摘要：小麦根系吸收土壤中的¹⁴C-辛硫磷,经茎转运到植株地上各部分,累积在小麦叶片中的¹⁴C-辛硫磷残留物再通过蒸腾、代谢和光解等途径不断转移和消解,或以¹⁴CO₂,或以其它含¹⁴C-化合物形式向体外逸出,经过整个生育期(90天)的转移和消解,麦收后土壤中仍有少量¹⁴C-辛硫磷残留物,这些残留物或以含¹⁴C土壤蒸发液形式、或由土壤微生物作用分解成¹⁴CO₂逸出土壤。

• Abstract：The degradation and the transmission of ¹⁴C-phoxim in potting soil after mixing the chemical with the soil were studied. The phoxim in the soil was uptaken by roots of wheat plants and transmitted to the organs above the ground. The leave residue of the phoxim was disappeared through transpiration,metabolization and photo-dissociation. The residual phoxim in soil is either decomposed into CO₂ or evaporated together with soil water.

• Key words：phoxim  soil  ¹⁴C  wheat  photo-dissociation

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