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作 者 ：朱树秀,尹力上

期 刊 ：生态学报 1988年 8卷 1期 页码：59~65

关键词：小麦；

摘 要 ：经拌土处理施入盆钵土壤中的¹⁴C-辛硫磷经土壤微生物和光的作用会降解。土壤中的这些辛硫磷残留物能被春小麦根系吸收,经茎转运到植株地上部分。茎只起输导作用,滞留的残留物较少;而叶子,特别是旗叶中能保持较高的残留水平。不同层次叶片累积的¹⁴C-辛硫磷残留物再通过蒸腾、代谢和光解等途径不断转移消解,或以¹⁴CO₂,或以其他含¹⁴C化合物的形式向周围环境中逸出。春小麦叶片中的¹⁴C-辛硫磷总残留提取物中约有50％的非光敏性物质。农药在土壤—植物—空气三者之间具有连续性,是农药生态毒理研究中一个必须注意的问题。

Abstract:Roots of spring wheat plants can absorb the residues of ¹⁴C-pboxim, which was applied in the potting soil just before sowing, and transmit them to parts of plants above ground through stems. The stems only play a part cf transport and a few chemical residues can be ct deained in the stems. Much more residues can be held in the leaves, especially in flag leaves.The ¹⁴C-phoxim residues which were accumulated in the leaves at different levels of plants were contionusly transmitted and dissociated by transpirat...

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