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首页> 外文期刊>Environmental Pollution >Measurement of trifluralin volatilization in the field: Relation to soil residue and effect of soil incorporation
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Measurement of trifluralin volatilization in the field: Relation to soil residue and effect of soil incorporation

机译：田间氟乐灵挥发的测量：与土壤残留量和土壤掺入效应的关系

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Volatilization may represent a major dissipation pathway for pesticides applied to soils or crops. A field experiment (September, 2002), consisted in volatilization fluxes measurements during 6 days, covering the periods before and after soil incorporation carried out 24 h after trifluralin spraying on bare soil. Evolution of concentration in soil was measured during 101 days, together with soil physical and meteorological variables. Volatilization fluxes were very high immediately after application (1900 ng m(-2) s(-1)), decreased down to 100 ng m(-2) s(-1) in the following 24 h. Soil incorporation strongly abated trifluralin concentration in the air. 99% of the total volatilization losses recorded over the 6 days following application occurred before incorporation. Volatilization fluxes evidenced a diurnal cycle driven by environmental conditions. Soil trifluralin residues could still be quantified 101 days after application. Our,results highlight the caution required when using soil degradation half-life values in the field for volatile compounds. (c) 2006 Elsevier Ltd. All rights reserved.
机译：挥发可能是农药施用到土壤或农作物上的主要消散途径。野外试验（2002年9月）包括6天的挥发通量测量，涵盖了三氟拉林喷洒在裸露土壤上24小时后土壤掺入前后的时间。在101天内测量了土壤中浓度的变化以及土壤物理和气象变量。施用后的挥发通量很高（1900 ng m（-2）s（-1）），在接下来的24小时内降低到100 ng m（-2）s（-1）。土壤掺入能大大降低空气中三氟拉林的浓度。施用后6天内记录的总挥发损失的99％发生在合并之前。挥发通量证明是由环境条件驱动的昼夜循环。施用后101天仍可定量土壤三氟拉林残留量。我们的结果强调了在田间使用挥发性化合物的土壤降解半衰期值时需要注意的事项。 （c）2006 Elsevier Ltd.保留所有权利。

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