Distribution and affecting factors of soil organic carbon and total nitrogen along the altitudinal belt in the eastern Sejila Mountain of Tibet
[Objective] In order to better understand the responses of forest ecosystems in Qinghai-Ti-bet Plateau to global climate change, variations of soil carbon and nitrogen in the sub-alpine in the eastern Sejila Mountain of Tibet were studied. [Method] The variation characteristics of soil bulk density,pH,soil organic carbon,total nitrogen,and soil microbial biomass C and N at the surface layer(0 - 20 cm)were conducted by the soil samples along the altitudinal belts in the eastern Sejila mountain of Tibet. The impact of different ecological factors on soil organic carbon,total nitrogen,and microbial biomass carbon and nitrogen content were analyzed as well. [Result] The paper showed that soil bulk density and pH decreased as the increase of elevation. SOC, TN, MBC and MBN increased as elevation increased and their contents among different vegetation were in the following order: Alpine shrub > Sabina salutary forest >Rhododendron iorest>Abies georgei var. smithii forest. And those indicators increased as the increase of elevation. Soil temperature,humidity, pH and vegetation types were variable ecological factors which may regulate soil carbon and nitrogen along elevation. [Conclusion] The results proved the distribution and its influencing factors of soil carbon and nitrogen at different altitudes and laid the foundation for the further study of the forest ecosystems in the eastern Sejila Mountain of Tibet.
SOCsoil microbial biomass C and Naltitudinal beltSejila Mountain of Tibet
NETL
NSTL
万方数据
维普
