论文部分内容阅读
硅元素是地球第二大组成元素,深刻影响着地表物质循环,是陆海相互作用研究、全球碳循环研究的关键元素之一。从自然风化、生物过程和人类活动3个方面综述了国内外有关地表过程对硅产出影响的研究进展,重点分析了生物过程和人类活动在硅生物地球化学循环过程中的作用。综合分析指出,应着重开展生物参与下原生/次生硅酸盐矿物风化速率的研究,重视高等植物在区域硅循环中的作用;富营养化与筑坝对于河流硅的滞留都十分重要,因筑坝产生的水库清水下泄在中下游河道产生的潜在效应很可能对河口硅输入产生重要的影响。应采用地球化学示踪技术,加强这方面的定量研究、模型研究、过程研究以及系统的综合性研究,特别是对流域地表过程的改变以及与筑坝、富营养化过程的联合作用,应进行深入的多学科交叉综合研究。
Silicon is the second largest component of the earth, a profound impact on the surface material circulation, is one of the key elements of the study on the interaction between land and sea and the global carbon cycle. The progress of research on the influence of surface processes on silicon production at home and abroad is reviewed from three aspects: natural weathering, biological processes and human activities. The role of biological processes and human activities in the biogeochemical cycling of silicon is emphatically analyzed. The comprehensive analysis indicates that we should pay more attention to the study on the weathering rate of primary / secondary silicate minerals under biological participation, and attach importance to the role of higher plants in the regional silicon cycle. Eutrophication and dam construction are very important for the retention of river silicon. The potential effects of reservoir clean water from reservoir dams on the middle and lower reaches of the river are likely to have a significant impact on the silicon input to estuaries. Geochemical tracer technology should be used to enhance quantitative research, model studies, process studies and systematic studies in this area, especially the changes of the surface processes in the basin and the combined effects of damming and eutrophication processes should be carried out In-depth interdisciplinary research.