Abstract : mainly reviewed distribution of organic nitrogen , early diagenesis ( such as counteract - eutrophication , nitrification / denitrification et al . ) , the controlling factors of nitrogen cycling ; and the relationship between nitrogen and ecological system in sediments in recent years , which may contribute to research the nitrogen marine biogeochemical process 文摘:主要阐述海洋沉积物中氮的存在形式与分布、氮的早期成岩和去营养化作用、硝化和反硝化作用以及氮与生物特定种群的关系等,探讨了影响海洋沉积物中的氮循环的主要因素,分析了海洋沉积物中的氮与生态系的关系,以期对研究氮的海洋生物地球化学过程有所帮助
The third part studies in detail on landscape ecological structures and functions of small watersheds in the region , including spatial physical structure and its differentiation ; biological structure and balance among its components . as a compound ecological system , function and its evolvement of small watersheds has also been touched . several landscape processes relating to functions , including biogeophisical processes , biogeochemical cycle and biogeosocial cycle have also been analyzed 第三部分详细研究了k域小流域景观生态学特点，包括景观空间物理结构及其分异；景观生物结构及其平衡；同时探讨了作为一个复合生态系统，小流域景观功能及其发展变化特点；认真分析了与功能有关的景观过程：牛物地球物理过程，生物地球化学循环以及生物地球社会循环。
The understanding of biogeochemical cycle of hydrogen , oxygen , carbon , nitrogen , and sulfur elements in nature ecosystem have increased substantially in the past two decades owing to the improvement of gas isotope ratio mass spectrometer and the wide application of isotopic studies with these elements 摘要近20年由于气相同位素比值质谱仪的改良和氢、氧、碳、氮和硫等稳定同位素的广泛研究，稳定同位素的研究技术已实质增加我们对于这些元素在自然生态系中生地化循环的了解。
The article is based on nation nature science foundation of china , " biogeochemical cycling of pollutants in complex environments of tidal flats in the yangtze estuary " ( no . 40131020 ) . the author chose open tidal flat of dong tang chongming yangtze estuary as research object and set up typical section plane so that under the good condition , the author measured hydrology element , total nitrogen and total phosphor index 本文依托国家自然科学基金重点项目“长江口滨岸潮滩复杂环境条件下物质循环研究” (批准号： 40131020 ) ，选择了长江口崇明东滩敞开型潮滩为研究对象，设置典型断面，在平静天气条件下，实测了水文、地球化学要素，获得了水位、流向、流速、 tn及tp等指标6000多个实测数据，着重对长江口潮滩水动力过程、 tn和tp的动力输移过程进行研究。
In order to understand the effects of drainage ditches on the biogeochemical cycling in wetland , this paper takes the sanjiang plain as an example , and makes a detail introduction to the impacts of drainage ditches on the characteristics of movement , transformation , inputs and outputs of chemical elements and on the chemical mass balance 以三江平原湿地为例，从沟渠对湿地化学元素迁移转化、湿地化学元素输入输出和湿地化学质量平衡影响方面分析了沟渠对湿地生物地球化学循环的影响。
