摘要
利用分室模型对长白山高山冻原系统氮素生物循环进行了研究 ;利用植物属种共有率对长白山高山冻原与北极冻原进行了对比研究 .结果表明 ,长白山高山冻原植物区系中有 89. 3%的属和 5 8. 6 %的种与北极冻原共有 ,其中地衣、苔藓和维管束植物与北极冻原相似类群属和种的共有率分别为 95 . 5 %和 5 8. 7%、82 . 1%和 76 . 3%、93. 1%和 4 0 . 5 % .这种高度的共有率决定了长白山高山冻原和北极冻原的植物区系和植被外貌具有高度相似性 .长白山高山冻原植被 土壤系统总氮净储存为6 5 2 2 0 . 6t ,其中土壤库占 99. 3% .长白山高山冻原系统中氮在各个分室的储存量分别是 :植被库 2 37 .4t;凋落物库 14. 5 3t;土壤库 6 4 837 .9t.地上植物活体、地下根系、凋落物中氮素年转移量分别为 :131. 7t·a-1,5 8t·a-1和 73 .7t·a-1.
The nitrogen bio-cycle was discussed in the alpine tundra ecosystem of Changbai Mountain through compartment model. The alpine tundra of Changbai Mountain was compared with Arctic tundra by the common ratio of genus and species in this paper. It was found that the 89.3% of genus and 58.6% of species was the common between Changbai alpine tundra and Arctic tundra while 95.5% of lichen genus and 58.7% lichen species, 82.1% of moss genus and 76.3% of moss species, 93.1% of vascular bundle genus and 40.5% of vascular bundle species were the common, respectively, which made vegetation type or community to be similar between Changbai alpine tundra and Arctic tundra. The total storage of nitrogen was 65220.6 t in the vegetation-plant system of Changbai Mountain, of which soil pool amounted to 99.3%. The nitrogen storage of each compartment was as follows: the vegetation pool, litterfall pool and soil pool were 237.4 t, 145.3 t and 64837.9 t respectively. The transferable amounts of nitrogen were 131.7 t·a -1, 58 t/a and 73.7 t·a -1 in the aboveground plant, belowground root system and litterfall of alpine tundra ecosystem of Changbai Mountain.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2005年第2期1-4,共4页
Environmental Science
基金
国家自然科学重点基金项目 (4 0 173 0 3 3 )
中国科学院知识创新工程重要方向项目 (KZCX3 SW 42 3 )
关键词
氮生物循环
高山冻原
长白山
nitrogen bio-cycle
alpine tundra
Changbai Mountain
