Distribution characteristics of soil organic matter and total nitrogen on the Yajiageng vertical belt,Gongga Mountain around the Dadu River banks |
| |
Authors: | Yan Yan Xiaodan Wang |
| |
Institution: | Institute of Mountain Hazards and Environment, ChineseAcademy of Sciences, Chengdu 610041, Sichuan, China |
| |
Abstract: | Distribution characteristics of soil organic matter(SOM) and total nitrogen(TN) were studied in different plant communities
of the Yajiageng vertical belt in Gongga Mountain around the Dadu River banks. The results show: ➀ the contents of SOM and
TN of the plant communities gradually decreased with the following order: subalpine coniferous forest (3 027 m), subalpine
meadow (3 873 m), coniferous broadleaved mixed forest(2 737 m), subalpine shrub(3 565 m) and treeline(3 564 m). ➁ With soil
profile depth increasing, the contents of SOM and TN gradually decreased. For different vegetation types, the contents of
SOM and TN in sub-alpine coniferous forest were higher than that of other vegetational types. ➂ The ratio of the content of
carbon to the content of total nitrogen (C
C/C
TN) was 13.5–27.6, which was relatively lower than the appropriate C
C/C
TN of 25–30, and indicated that the soil in favor of the organic matter decomposed and nutrients released. C
C/C
TN in the soil had no correlation with sea level altitude. However, its distribution in the soil varied with different vegetation
types. ➃ Nitrogen in SOM existed mainly in the form of organic nitrogen, and C
C/C
TN in the soil was not obvious correlated with SOM and TN.
Biography: YAN Yan(1978–), female, Assistant professor, Ph. D., research direction: mountain environment and ecology. |
| |
Keywords: | Gongga Mountain soil organic matter(SOM) total nitrogen(TN) vertical belt |
本文献已被 维普 SpringerLink 等数据库收录! |
|