Nitrogen deposition and carbon sequestration in alpine meadows


Autoria(s): Xu Xingliang; Ouyang Hua; Cao Guangmin; Pei Zhiyong; Zhou Caiping
Data(s)

2004

Resumo

Nitrogen deposition experiments were carried out in alpine meadow ecosystems in Qinghai-Xizang Plateau in China, in order to explore the contribution of nitrogen deposition to carbon sequestration in alpine meadows. Two methods were used in this respect. First, we used the allocation of N-15 tracer to soil and plant pools. Second, we used increased root biomass observed in the nitrogen-amended plots. Calculating enhanced carbon storage, we considered the net soil CO2 emissions exposed to nitrogen deposition in alpine meadows. Our results show that nitrogen deposition can enhance the net soil CO2 emissions, and thus offset part of carbon uptake by vegetation and soils. It means that we have to be cautious to draw a conclusion when we estimate the contribution of nitrogen deposition to carbon sequestration based on the partitioning of N-15 tracer in terrestrial ecosystems, in particular in N-limited ecosystems. Even if we assess the contribution of nitrogen deposition to carbon sequestration based on increased biomass exposed to nitrogen deposition in terrestrial ecosystems, likewise, we have to consider the effects of nitrogen deposition on the soil CO2 emissions.

Identificador

http://ir.nwipb.ac.cn/handle/363003/1382

http://www.irgrid.ac.cn/handle/1471x/169712

Idioma(s)

英语

Fonte

Xu Xingliang, Ouyang Hua, Cao Guangmin, Pei Zhiyong, Zhou Caiping.Nitrogen deposition and carbon sequestration in alpine meadows.BIOGEOCHEMISTRY,2004,71(3):353-369

Palavras-Chave #生物科学 #alpine meadows #C sequestration #N deposition #soil CO2 emission
Tipo

期刊论文