Soil CO2 emission of different forest types in Sejila Mountains, southeast of Tibet

doi:10.3969/j.issn.1004-1524.2017.10.20

›› 2017, Vol. 29 ›› Issue (10): 1733-1741.DOI: 10.3969/j.issn.1004-1524.2017.10.20

• Environmental Science • Previous Articles Next Articles

Soil CO₂ emission of different forest types in Sejila Mountains, southeast of Tibet

YANG Hong^{1, 2}, CAO Jianting², XU Changchang¹, GUO Fenglei¹

1. Research Center of Climate Change and Material Cycle of Pedosphere of Tibet Plateau, Xizang Agriculture and Animal Husbandry College, Linzhi 860000, China;
2. Ecological Research Institute of Tibet Plateau, Xizang Agriculture and Animal Husbandry College, Linzhi 860000, China

Received:2017-04-11 Online:2017-10-20 Published:2017-12-05

Abstract

Abstract: In order to elucidate the characteristics of soil carbon emission in different forest types and effects of O layer soil on soil carbon emission, treatments removed and retained O layer were set up, and the carbon emissions of the main types of forest (fir, rhododendron, alpine oak, spruce) in the Sejila mountains in southeastern of Tibet were measured, respectively. The results showed that: (1)Four kinds of forest soils were acidic (pH<6.0), and the pH gradually increased with deepening of the soil; (2) Soil temperature and humidity changes had the characteristics of single peak diurnal variation, the maximum value appeared during 12:00—14:00, the minimum appears during 8:00—9:00; On diurnal variation scale, soil CO₂ emission rate also showed the diurnal variation characteristics of single peak type, and CO₂ emission rates of the four forest types were as follows: remain O layer>remove O layer>O layer, the differences of CO₂ emission rate between different treatments were extremely significant (P<0.01); The characteristics of cumulative carbon flux in different forest types were consistent with the variation of soil CO₂ emission rate.

Key words: Sejila mountain, forest soil, carbon emission rate, cumulative carbon flux

CLC Number:

S718.55

YANG Hong, CAO Jianting, XU Changchang, GUO Fenglei. Soil CO₂ emission of different forest types in Sejila Mountains, southeast of Tibet[J]. , 2017, 29(10): 1733-1741.

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Soil CO₂ emission of different forest types in Sejila Mountains, southeast of Tibet

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