Distribution characteristics and influencing factors of soil organic carbon in alpine ecosystems on Tibetan Plateau transect
The undisturbed regions along the Qinghai-Tibet road crossing the natural zones of montane desert, alpine meadow-steppe, and montane shrub-coniferous forest were chosen as study area. Soil samples were collected at 23 places and the relations between the influencing factors and distribution of soil...
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| Language: | English |
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Zhejiang University Press
2007-07-01
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| Series: | 浙江大学学报. 农业与生命科学版 |
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| Online Access: | https://www.academax.com/doi/10.3785/1008-9209.2007.04.0443 |
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| author | TIAN Yu-qiang OUYANG Hua SONG Ming-hua NIU Hai-shan HU Qi-wu |
| author_facet | TIAN Yu-qiang OUYANG Hua SONG Ming-hua NIU Hai-shan HU Qi-wu |
| author_sort | TIAN Yu-qiang |
| collection | DOAJ |
| description | The undisturbed regions along the Qinghai-Tibet road crossing the natural zones of montane desert, alpine meadow-steppe, and montane shrub-coniferous forest were chosen as study area. Soil samples were collected at 23 places and the relations between the influencing factors and distribution of soil organic carbon (SOC) content were studied. The results indicated that the orders of SOC content for the whole soil profile in different vegetation, in the horizontal direction, were showed as below: forest> shrub>meadow>steppe>desert; all the SOC contents of upper 10 cm soil layers in vegetations of forest, shrub and meadow, as well as that of upper 20 cm soil layers in steppe, in the vertical direction, were higher than that of corresponding lower soil layers. However, the SOC content in desert was uniform. The grey correlative analysis between the climatic factors and SOC content in upper part soil showed that the precipitation was the dominant climatic factor affecting the distribution of SOC on the Tibetan Plateau transect. The influence of precipitation on the horizontal distribution of SOC decreases as the increase of precipitation in the horizontal direction. The vertical distribution of SOC along soil profile was greatly affected by precipitation or soil clay content in upper part of soil, as well as was clearly influenced by soil silt content or sand content in lower part of soil. The influences of both soil bulk density and soil pH on the vertical distribution of SOC along soil profile declined gradually. The plant biomass was the most important biotic factor affecting the distribution of SOC. |
| format | Article |
| id | doaj-art-90b4e41b26a2497a84c4f834dfd90eb4 |
| institution | Kabale University |
| issn | 1008-9209 2097-5155 |
| language | English |
| publishDate | 2007-07-01 |
| publisher | Zhejiang University Press |
| record_format | Article |
| series | 浙江大学学报. 农业与生命科学版 |
| spelling | doaj-art-90b4e41b26a2497a84c4f834dfd90eb42025-08-20T03:58:14ZengZhejiang University Press浙江大学学报. 农业与生命科学版1008-92092097-51552007-07-013344344910.3785/1008-9209.2007.04.044310089209Distribution characteristics and influencing factors of soil organic carbon in alpine ecosystems on Tibetan Plateau transectTIAN Yu-qiangOUYANG HuaSONG Ming-huaNIU Hai-shanHU Qi-wuThe undisturbed regions along the Qinghai-Tibet road crossing the natural zones of montane desert, alpine meadow-steppe, and montane shrub-coniferous forest were chosen as study area. Soil samples were collected at 23 places and the relations between the influencing factors and distribution of soil organic carbon (SOC) content were studied. The results indicated that the orders of SOC content for the whole soil profile in different vegetation, in the horizontal direction, were showed as below: forest> shrub>meadow>steppe>desert; all the SOC contents of upper 10 cm soil layers in vegetations of forest, shrub and meadow, as well as that of upper 20 cm soil layers in steppe, in the vertical direction, were higher than that of corresponding lower soil layers. However, the SOC content in desert was uniform. The grey correlative analysis between the climatic factors and SOC content in upper part soil showed that the precipitation was the dominant climatic factor affecting the distribution of SOC on the Tibetan Plateau transect. The influence of precipitation on the horizontal distribution of SOC decreases as the increase of precipitation in the horizontal direction. The vertical distribution of SOC along soil profile was greatly affected by precipitation or soil clay content in upper part of soil, as well as was clearly influenced by soil silt content or sand content in lower part of soil. The influences of both soil bulk density and soil pH on the vertical distribution of SOC along soil profile declined gradually. The plant biomass was the most important biotic factor affecting the distribution of SOC.https://www.academax.com/doi/10.3785/1008-9209.2007.04.0443Tibetan Plateautransectalpine ecosystemsoil organic carboninfluencing factors |
| spellingShingle | TIAN Yu-qiang OUYANG Hua SONG Ming-hua NIU Hai-shan HU Qi-wu Distribution characteristics and influencing factors of soil organic carbon in alpine ecosystems on Tibetan Plateau transect 浙江大学学报. 农业与生命科学版 Tibetan Plateau transect alpine ecosystem soil organic carbon influencing factors |
| title | Distribution characteristics and influencing factors of soil organic carbon in alpine ecosystems on Tibetan Plateau transect |
| title_full | Distribution characteristics and influencing factors of soil organic carbon in alpine ecosystems on Tibetan Plateau transect |
| title_fullStr | Distribution characteristics and influencing factors of soil organic carbon in alpine ecosystems on Tibetan Plateau transect |
| title_full_unstemmed | Distribution characteristics and influencing factors of soil organic carbon in alpine ecosystems on Tibetan Plateau transect |
| title_short | Distribution characteristics and influencing factors of soil organic carbon in alpine ecosystems on Tibetan Plateau transect |
| title_sort | distribution characteristics and influencing factors of soil organic carbon in alpine ecosystems on tibetan plateau transect |
| topic | Tibetan Plateau transect alpine ecosystem soil organic carbon influencing factors |
| url | https://www.academax.com/doi/10.3785/1008-9209.2007.04.0443 |
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