We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Patterns of SOC and soil C and their relations to climatic factors and soil characteristics on the Qinghai-Tibetan Plateau.
- Authors
Wang, Shaoqiang; Fan, Jiangwen; Song, Minghua; Yu, Guirui; Zhou, Lei; Liu, Jiyuan; Zhong, Huaping; Gao, Lupeng; Hu, Zhongmin; Wu, Weixing; Song, Ting
- Abstract
Background and aims: SOC inventory and soil δC were widely used to access the size of soil C pool and to indicate the dynamics of C input and output. The effects of climatic factors and soil physical characteristics and plant litter input on SOC inventory and soil δC were analyzed to better understand the dynamics of carbon cycling across ecosystems on the Qinghai-Tibetan Plateau. Methods: Field investigation was carried out along the two transects with a total of 1,875 km in length and 200 km in width. Sixty-two soil profiles, distributed in forest, meadow, steppe, and cropland, were stratified sampled every 10 cm from 0 to 40 cm. Results: Our result showed that SOC density in forest and meadows were much higher than in steppe and highland barley. In contrast, δC in forest and meadow were lower than in steppe and highland barley. Soil δC tended to enrich with increasing soil depth but SOC decline. SOC and δC (0-40 cm) were correlated with different climatic factors in different ecosystems, such that SOC correlated negatively with MAT in meadow and positively with MAP in steppe; δC correlated positively with MAT in meadow and steppe; and δC also tended to increase with increasing MAT in forest. Of the variation of SOC, 55.15 % was explained by MAP, pH and silt content and 4.63 % was explained by the interaction between MAT and pH across all the ecosystems except for the cropland. Meanwhile, SOC density explained 27.40 % of variation of soil δC. Conclusions: It is suggested that different climatic factors controlled the size of the soil C pool in different ecosystems on the Tibetan Plateau. SOC density is a key contributor to the variation of soil δC.
- Subjects
TIBETAN Plateau; CHINA; SOIL physical chemistry; BIOTIC communities; ECOSYSTEM management; PLANT litter; SOIL profiles
- Publication
Plant & Soil, 2013, Vol 363, Issue 1/2, p243
- ISSN
0032-079X
- Publication type
Article
- DOI
10.1007/s11104-012-1304-6