【摘要】 基于氮元素对生态系统的重要性及其对生物生长、人类活动的指示性,本研究选择人类活动氮排放为切入点,广东省深圳市为研究区,估算快速城市化过程中人类活动所产生的氮元素排放量。研究主要由农业、工业生产及人类生活三方面进行计量,分析人类活动过程中的氮排放对生态环境的影响。基于1991-2012年深圳市人类活动氮排放分析结果表明,氮排放总量呈现波动而后下降的趋势,随着城市发展,深圳市农业氮排放比重明显减少,工业生产氮排放明显增加,人类生活方面的氮排放则先上升,后面呈现下降的趋势,显示高强度的工业生产及高密度的人口聚集为深圳市带来一定生态影响。更多还原

【Abstract】 Because of the global population continually gather in urban areas,the agricultural production,industrial development,daily consumption and other human activities bring significant negative effects on ecosystem. At present,the related indexes of nitrogen,nitrogen oxides and the other compounds are widely used in studies of ecology,environment and biochemistry. Based on the importance of nitrogen to ecosystem and the indicative function of nitrogen to biological growth and the human activities,the starting point is the human activities,and the study estimations the nitrogen emissions which have been produced by human activities. The study area is Shenzhen Guangdong. The types of nitrogen emissions include agricultural,industrial production and living life,and the study analyzes the influence on environment which is caused by nitrogen emissions of human activities. The agricultural production includes the fertilization,agricultural irrigation and crop harvest. The industrial production includes industrial waste and sewage. The human feces,garbage and domestic sewage compose human daily activities. The result shows that the agricultural nitrogen emissions are decreased,but the industrial nitrogen emissions are significantly increased. The emissions of human activities increase at first,but finally the emissions decrease. The result shows that the development of industrial production and the increase of population bring a certain extent effects.更多还原