Element cycling in the dominant plant community in the Alpine tundra zone of Changbai Mountains, China

编号 zgly0000376214

文献类型 期刊论文

文献题名 Element cycling in the dominant plant community in the Alpine tundra zone of Changbai Mountains, China

学科分类 220.10;林业基础学科

作者 LIUJing-shuang  YUJun-bao 

作者单位 NortheastInstituteofGeographyandAgricultureEcology 

母体文献 Journal of Environmental Sciences;环境科学学报: 英文版 

年卷期 2005,17(3)

页码 521-525

年份 2005 

分类号 X173  X171.1 

关键词 元素循环  生态系统  优势植物群落  阿尔卑斯山  冻土地带  长白山 

文摘内容 Element cycling in the dominant plant communities including Rh. aureum, Rh. redowskianum and Vaccinium uliginosum in the Alpine tundra zone of Changbai Mountains in northeast China was studied. The results indicate that the amount of elements from litter decomposition was less than that of the plant uptake from soil, but that from plant uptake was higher than that in soil with mineralization process released. On the other hand, in the open system including precipitation input and soil leaching output, because of great number of elements from precipitation into the open system, the element cycling(except N, P) in the Alpine tundra ecosystem was in a dynamic balance. In this study, it was also found that different organ of plants had significant difference in accumulating elements. Ca, Mg, P and N were accumulated more obviously in leaves, while Fe was in roots. The degree of concentration of elements in different tissues of the same organ of the plants also was different, a higher concentration of Ca, Mg, P and N in mesophyll than in nerve but Fe was in a reversed order. The phenomenon indicates ( 1 ) a variety of biochemical functions of different elements, (2) the elements in mesophyll were with a shorter turnover period than those in nerve or fibre, but higher utilization rate for plant. Therefore, this study implies the significance of keeping element dynamic balance in the alpine tundra ecosystem of Changbai Mountains。