| 摘要: |
| 本文介绍 Bowen比仪测定大面积农田土壤氨挥发的基本原理、仪器安装的细节和方法的可靠程度 ,以及利用该方法进行的 5次田间试验的测定结果。对仪器记录数据的分析表明 ,该方法的系统误差在 10 %以下 ,可以用于农田尺度下土壤氨挥发过程的测定。另外 ,在我国北方地区典型生产条件下 ,冬小麦 /夏玉米体系每次施 N后 ,土壤的氨挥发损失 (N)在 18.9～ 63.5 kg.hm-2 ,占施入肥料 N的 9.9%～ 37.0 % |
| 关键词: 氨挥发 Bowen比仪 土壤 农田 测定方法 |
| DOI： |
| 修订日期：2001-04-05 |
| 基金项目:中澳合作项目 ACIAR,L WR1/ 96/ 164 |
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| Method for Measurement of Ammonia Volatilization from Large Area Field by Bowen Ratio System |
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| Abstract: |
| In this paper, the principle of using Bowen ratio system to measure ammonia volatilization from large area field, the details of installation of Bowen ratio system, and the credibility degree of the method were discussed. The 5 measurements showed that the systematic error of this method is less than 10%. This indicated that the Bowen ratio system can be used for measuring ammonia volatilization under field scale. Using this method, we found that the ammonia volatilization (N), under the typical productive conditions in North China Plain, ranged from 18.9 to 63.5kg N per hectare, 9.9%~37.0% of applied N. |
| Key words: ammonia volatilization,Bowen ratio system |
