| 毛萌,任 理.室内滴灌施药条件下阿特拉津在土壤中运移规律的研究Ⅰ：物理模拟与参数确定[J].水利学报,2005,36(5):0581-0587 |
| 室内滴灌施药条件下阿特拉津在土壤中运移规律的研究Ⅰ：物理模拟与参数确定 |
| Study on atrazine transport in soil from trickle chemigation in laboratoryⅠ. Physical simulation and parameter determination |
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| DOI： |
| 中文关键词: 滴灌 土壤水分 阿特拉津 运移 吸附 降解 物理模拟。 |
| 英文关键词: trickle irrigation soil moisture atrazine adsorption degradation physical simulation |
| 基金项目: |
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| 中文摘要: |
| 利用滴灌系统施用农药可以将农药直接作用到植物根区，这是节水农业和生态农业中一种先进的灌溉施药方法。本文详细地描述了在实验室内开展的滴灌施用除草剂-阿特拉津在土壤中运移的物理模拟实验，介绍了采用批量平衡技术和批培养方法获得阿特拉津在供试土壤中吸附特性参数和降解速率常数的实验步骤，给出了根据Freundlich吸附等温线和一级动力学方程对实验数据的拟合结果。此外，由土壤干容重及吸管法求得的土壤质地，利用土壤传递函数间接求取了van Genuchten型水力学参数，并由易混合置换实验得到了溶质运移的弥散度。本文的研究成果为进一步开展滴灌施用阿特拉律在土壤中运移规律的数值分析奠定了基础。 |
| 英文摘要: |
| In recent years, the use of chemigation has become a method to apply pesticides directly to the root zone of plant through trickle irrigation systems. In this paper, the distribution of atrazine (a kind of herbicide) in soil was monitored in a trickle chemigation experiment. The adsorption and degradation parameters of atrazine in the soil to be tested were obtained by batch equilibrium and batch incubation experiments. The procedures of experiments were described in detail. In addition, the soil hydraulic parameters in van Genuchten type generated by using soil texture and bulk density and the parameters of solute transport were obtained from miscible displacement experiment. This study provides experimental data for calibration of the model to carry out numerical analysis of atrazine transport in the soil at different initial water contents and emitter discharges under trickle irrigation. |
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