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首页> 外文期刊>Journal of Chemical Ecology >Phytotoxicity of Vulpia Residues: IV. Dynamics of Allelochemicals During Decomposition of Vulpia Residues and Their Corresponding Phytotoxicity
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Phytotoxicity of Vulpia Residues: IV. Dynamics of Allelochemicals During Decomposition of Vulpia Residues and Their Corresponding Phytotoxicity

机译：Vulpia残留物的植物毒性：IV。化V残留物分解过程中的化感物质动力学及其相应的植物毒性

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摘要

The behavior and dynamics of 20 identified allelochemicals in vulpia residues were both collectively and individually monitored, and their kinetic phytotoxicity was assessed. The total content of the identified allelochemicals in decaying vulpia residues increased from 0.31 to 1.24 mg/g dry residue over a 21-day decomposition period, while the total phenolic content increased from 1.86 to 2.16 mg/g dry residue. This corresponded to a phytotoxicity increase from 42% to 82% of radical inhibition. Allelochemicals changed in composition and quantity over the duration of the residue decomposition. Addition of soil to the residues reduced the total allelochemical contents extracted and altered the dynamic pattern. In the same period, the total content of allelochemicals declined from 0.061 to 0.046 mg/g residue + soil, with the total phenolics reduced from 0.20 to 0.11 mg/g residue + soil, corresponding to a radical length increase from 53% to 109% of control. Only 14 of the identified allelochemicals were detected in the mix of soil and residues, in contrast to 20 present in the residues alone. The implications of these findings are discussed.
机译：集体和单独监测了在狐臭残留物中20种已鉴定的化感物质的行为和动力学，并对其动力学植物毒性进行了评估。在经过21天的分解过程中，腐烂的狐臭残留物中已鉴定的化感物质的总含量从0.31增加到1.24 mg / g，而总酚含量从1.86增加到2.16 mg / g。这相当于自由基抑制作用的植物毒性从42％增加到82％。在残留物分解过程中，化感物质的成分和数量发生了变化。将土壤添加到残留物中会减少提取的总化感物质含量并改变动态模式。同期，化感物质的总含量从0.061 mg / g残留物+土壤降至0.046 mg / g，酚类总含量从0.20 mg / g残留物+土壤降至0.11 mg / g残留物，对应于自由基长度从53％增加至109％控制。在土壤和残留物的混合物中仅检测到14种已鉴定的化感物质，而仅在残留物中存在20种。讨论了这些发现的含义。

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