Effects of Dicyandiamide on Urea Nitrogen Transformation in Alkaline Soil in Different Temperatures

ZHANG Lu; PI Hejie; ZHOU Xihong; JIANG Zhaohui; ZENG Qingru

doi:10.13961/j.cnki.stbctb.2015.06.031

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Effects of Dicyandiamide on Urea Nitrogen Transformation in Alkaline Soil in Different Temperatures

- Effects of Dicyandiamide on Urea Nitrogen Transformation in Alkaline Soil in Different Temperatures
- Bulletin of Soiland Water Conservation Vol. 35, Issue 6, Pages: 172-177(2015)
- 作者机构：
  
  1. 湖南农业大学资源环境学院,湖南,长沙,410128
  2. 陕西省土地工程建设集团国土资源部退化及未利用土地整治工程重点实验室,陕西,西安,710075
  3. 株洲市环境保护研究院,湖南,株洲,412007
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2015.06.031
  CLC：
- Published：2015
- 稿件说明：
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ZHANG Lu, PI Hejie, ZHOU Xihong, et al. Effects of Dicyandiamide on Urea Nitrogen Transformation in Alkaline Soil in Different Temperatures[J]. Bulletin of Soiland Water Conservation, 2015, 35(6): 172-177.
DOI：

ZHANG Lu, PI Hejie, ZHOU Xihong, et al. Effects of Dicyandiamide on Urea Nitrogen Transformation in Alkaline Soil in Different Temperatures[J]. Bulletin of Soiland Water Conservation, 2015, 35(6): 172-177. DOI： 10.13961/j.cnki.stbctb.2015.06.031.

摘要

[目的

]

为了提高氮素的利用效率

减少NO

-N淋溶污染

本试验研究了硝化抑制剂双氰胺(DCD)对碱性土壤中氮素转化的影响

为氮素的合理高效利用

增加作物产量提供参考。[方法

]

采用实验室人工气候箱培养法

研究双氰胺在15

25和35℃不同温度下对山西省晋城市菜园土(碱性)的pH值、氨挥发量及NH

-N和NO

-N转化的影响。[结果

]

在碱性土壤中施加双氰胺后

其pH值高于对照

且pH值随土壤温度的升高而升高;同时碱性土壤中氨挥发量也随温度升高而增大

每升高10℃

氮素以氨气形式损失的增加率约为6.90%;而土壤NO

-N量却随温度的升高有所下降

其变化趋势与土壤NH

-N量变化相反

此外温度的升高可导致NH

-N含量峰值的出现时间提前

每增加10℃提前约为1周左右。双氰胺的施加可减少了NH

-N转化为NO

-N的量。[结论

]

双氰胺的施加可减少碱性土壤中氮素转化为NO

-N所带来的淋溶污染问题

且随温度的升高pH值、氨挥发量和NH

-N量增加。

Abstract

[Objective] In order to increase the utilization efficiency of nitrogen

reduce the leaching pollution of nitrifying nitrogen

the study explored the effect of nitrification inhibitor DCD on nitrogen transformation in alkaline soils

which may provide a reference for rational and efficient use of nitrogen and increasing crop yields.[Methods] The laboratory artificial climate chamber culture was used to study the effects of DCD on pH value

ammonia volatilization

nitrifying nitrogen and ammonia nitrogen conversion of Jincheng City of Shaanxi Province(alkalinity) garden soils in different temperatures of 15℃

25℃ and 35℃.[Results] The result indicated that the pH value with DCD was higher than the control

which increased with the temperature increasing. The ammonia volatilization increased with the temperature increasing in alkaline soil

so the temperature increase by 10℃

the increasing rate of nitrogen loss in the form of ammonia was about 6.90%. The nitrifying nitrogen content decreased with temperature increasing

whose variation was opposite with ammonia nitrogen content. Moreover

the peak time of ammonia nitrogen content with temperature increasing was about one week ahead with the increase of temperature by each 10℃. DCD reduced the conversion of ammonia nitrogen to nitrifying nitrogen.[Conclusion] DCD can reduce the leaching pollution problems by lowering the nitrogen conversion to nitrifying nitrogen

and the pH value

ammonia volatilization and ammonia nitrogen increase with the temperature increasing.

关键词

Keywords

references

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