| DMPP对菜地土壤氮素径流损失的影响 |
| 摘要点击 1886 全文点击 1566 投稿时间：2008-04-01 修订日期：2008-06-11 |
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| 中文关键词 DMPP 氮素损失 水环境 尿素 |
| 英文关键词 3,4-dimethyl pyrazole phosphate（DMPP) nitrogen runoff loss water environment urea |
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| 中文摘要 |
| 利用模拟降雨试验，研究了尿素添加1%新型硝化抑制剂3， 4-二甲基吡唑磷酸盐（3， 4-dimethyl pyrazole phosphate，DMPP）对菜地土壤氮素径流损失的影响.结果表明，添加DMPP抑制剂于尿素， 3次模拟降雨地表径流液中铵态氮含量分别是常规尿素处理的1.42、 2.82和1.95倍，铵态氮径流损失有所增加；使用硝化抑制剂DMPP，与常规尿素相比，3次模拟降雨地表径流液中硝态氮含量分别减少70.2%、 59.7%和52.1%，亚硝态氮含量分别减少98.7%、 90.6%和85.6%，可显著降低硝态氮和亚硝态氮的径流损失，尤其是亚硝态氮的径流损失接近于不施氮处理；常规尿素添加1%的DMPP抑制剂后，可减少39.0%～44.8%的无机氮进入地表水体，明显降低氮素径流迁移损失.使用DMPP抑制剂可减轻氮素向地表水体迁移的风险，具有显著的生态效益. |
| 英文摘要 |
| The effect of urea with 1% 3，4-dimethyl pyrazole phosphate（DMPP) on inorganic nitrogen runoff loss from agriculture field was determined in an undisturbed vegetable soil by using the simulated artificial rainfall method. The results show that，during the three simulated artificial rainfall period，the ammonium nitrogen content in the runoff water is increased 1.42， 2.82 and 1.95 times with the DMPP application treatment compared to regular urea treatment，respectively.In the urea with DMPP addition treatment，the nitrate nitrogen content is decreased 70.2%， 59.7% and 52.1% in the three simulated artificial rainfall runoff water，respectively.The nitrite nitrogen content is also decreased 98.7%， 90.6% and 85.6% in the three simulated artificial rainfall runoff water，respectively.The nitrate nitrogen and nitrite nitrogen runoff loss are greatly declined with the DMPP addition in the urea.Especially the nitrite nitrogen is in a significant low level and is near to the treatment with no fertilizer application.The inorganic nitrogen runoff loss is declined by 39.0% to 44.8% in the urea with DMPP addition treatment.So DMPP could be used as an effective nitrification inhibitor to control the soil ammonium oxidation，decline the nitrogen runoff loss，lower the nitrogen transformation risk to the waterbody and be beneficial for the ecological environment. |
