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首页> 外文期刊>Environmental Science & Technology >Measuring Herbicide Volatilization from Bare Soil
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Measuring Herbicide Volatilization from Bare Soil

机译：测量裸露土壤中的除草剂挥发

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摘要

A field experiment was conducted to measure surface dissipation and volatilization of the herbicide triallate after application to bare soil using micrometeorological,chamber,and soil-loss methods.The volatilization rate was measured continuously for 6.5 days and the range in the daily peak values for the integrated horizontal flux method was from 32.4 (day 5)to 235.2 g ha~(-1)d~(-1)(day 1),for the theoretical profile shape method was from 31.5 to 213.0 g ha~(-1)d~(-1),and for the flux chamber was from 15.7 to 47.8 g ha~(-1)d~(-1).Soil samples were taken within 30 min after application and the measured mass of triallate was 8.75 kg ha~(-1).The measured triallate mass in the soil at the end of the experiment was approximately 6 kg ha"1.The triallate dissipation rate,obtained by soil sampling,was approximately 334 g ha~(-1)d~(-1)(98 g d~(-1))and the average rate of volatilization was 361 g ha~(-1)d~(-1).Soil sampling at the end of the experiment showed that approximately 31% (0.803 kg/2.56 kg)of the triallate mass was lost from the soil.Significant volatilization of triallate is possible when applied directly to the soil surface without incorporation.
机译：通过微气象，室和土壤流失方法，进行了田间试验，以测定除草剂三氯乙酸盐在裸露土壤上的表面耗散和挥发，连续测量6.5天的挥发速率，并测定其每日峰值范围。集成水平通量方法从32.4（第5天）到235.2 g ha〜（-1）d〜（-1）（第1天），理论轮廓形状法从31.5到213.0 g ha〜（-1）d 〜（-1），助熔剂室的容量为15.7至47.8 g ha〜（-1）d〜（-1）。施药后30分钟内取土壤样品，测得的脯氨酸质量为8.75 kg ha〜 （-1）。实验结束时在土壤中测得的脯氨酸质量约为6 kg ha“ 1。通过土壤采样获得的脯氨酸消散速率约为334 g ha〜（-1）d〜（- 1）（98 gd〜（-1）），平均挥发速率为361 g ha〜（-1）d〜（-1）。实验结束时的土壤采样显示约31％（0.803 kg / 2。从土壤中损失掉了56公斤的木犀草物质。当直接将其施用到土壤表面而不掺入时，木犀草可能会大量挥发。

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  • 来源
    《Environmental Science & Technology》 |2006年第10期|p.3223-3228|共6页
  • 作者

    S.R.YATES;

  • 作者单位

    USDA-ARS,GEBJ Salinity Laboratory, 450 W.Big Springs Road,Riverside,California 92507;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 环境化学;
  • 关键词

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