| 大气氮沉降对森林土壤酸化的影响 |
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| 引用本文： | 肖辉林.大气氮沉降对森林土壤酸化的影响[J].林业科学,2001,37(4):111-116. |
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| 作者姓名： | 肖辉林 |
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| 作者单位： | 广东省生态环境与土壤研究所 |
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| 基金项目： | 广东省农业环境综合治理重点试验室资助项目 |
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| 摘 要： | 因大气污染而不断增加的大气氮沉降量，在许多地区超过了森林生态系统的氮需求。氮在土壤中的化学和生物化学反应对H^ 离子的产生与消耗有重要影响。NH4^ 和NO3^-输入与输出的平衡状态影响着土壤－土壤溶液系统的酸化速率。过剩的氮沉降将加增NH4^ 的硝化和NO^-的淋失，加速土壤的酸化。土壤酸化对森林有危害作用。
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| 关 键 词： | 大气污染 氮沉降 森林土壤酸化 迁移 转化 |
| 修稿时间： | 1999年11月30 |
EFFECTS OF ATMOSPHERIC NITROGEN DEPOSITION ON FOREST SOIL ACIDIFICATION |
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| Xiao Huilin.EFFECTS OF ATMOSPHERIC NITROGEN DEPOSITION ON FOREST SOIL ACIDIFICATION[J].Scientia Silvae Sinicae,2001,37(4):111-116. |
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| Authors: | Xiao Huilin |
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| Institution: | 1.Guangdong Institute of Eco-environmental and Soil Sciences Guangzhou 510650 |
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| Abstract: | The increased deposition of atmospheric nitrogen due to the air pollution has exceeded the demands of forest ecosystems in many areas.The chemical and biochemical reactions of nitrogen in soils have significant effects on the production and consumption of H+.The balance between the inputs and outputs of NH+ 4 and NO- 3 determines the rate of acidification of the soil-soil solution system. Excessive nitrogen deposition will enhance the nitrification of NH+ 4 and the leaching of NO- 3,which are the processes of strong acidification.An increase in the NO- 3 concentration will increase the acidity and aluminium concentration in the soil solution.Basic cations will be leached out for accompanying the NO- 3 leaching,resulting in the acceleration of soil acidification.Soil acidification is harmful to forest. |
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| Keywords: | Atmospheric pollution Nitrogen deposition Forest soil Acidification |
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