Chin J Plan Ecolo ›› 2016, Vol. 40 ›› Issue (2): 93-101.DOI: 10.17521/cjpe.2015.0406
Special Issue: 青藏高原植物生态学:植物-土壤-微生物
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Bei-Bei ZHANG1,2, Fang LIU1, Jin-Zhi DING2,3, Kai FANG2,3, Gui-Biao YANG2,3, Li LIU2,3, Yong-Liang CHEN2, Fei LI2,3, Yuan-He YANG2,*()
Online:
2016-02-10
Published:
2016-03-08
Contact:
Yuan-He YANG
Bei-Bei ZHANG, Fang LIU, Jin-Zhi DING, Kai FANG, Gui-Biao YANG, Li LIU, Yong-Liang CHEN, Fei LI, Yuan-He YANG. Soil inorganic carbon stock in alpine grasslands on the Qinghai-Xizang Plateau: An updated evaluation using deep cores[J]. Chin J Plan Ecolo, 2016, 40(2): 93-101.
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方程 Equation | R2 | p | n |
---|---|---|---|
SICD0-100 = 1.9309SICD0-50 + 1.6766 | 0.90 | <0.01 | 114 |
SICD0-200 = 3.4592SICD0-50 + 6.8517 | 0.69 | <0.01 | 114 |
SICD0-300 = 4.9222SICD0-50 + 11.4026 | 0.61 | <0.01 | 114 |
Table 1 Relationships of soil inorganic carbon density (SICD) at depths of 0-100, 0-200 and 0-300 cm with SICD in the top 50 cm
方程 Equation | R2 | p | n |
---|---|---|---|
SICD0-100 = 1.9309SICD0-50 + 1.6766 | 0.90 | <0.01 | 114 |
SICD0-200 = 3.4592SICD0-50 + 6.8517 | 0.69 | <0.01 | 114 |
SICD0-300 = 4.9222SICD0-50 + 11.4026 | 0.61 | <0.01 | 114 |
Fig. 1 Vertical distributions of soil inorganic carbon density (SICD) at 50 cm intervals and relative proportion of each layer to total SICD in the 3 meters for alpine steppe (A, C) and alpine meadow (B, D). Letters indicate significant differences between the two grasslands types at each depth interval (Kruskal-Wallis test, p < 0.05).
草地类型 Grassland types | 面积 Area (104 km2) | SICD (kg C·m-2) | 无机碳库 SIC stock (Pg C) | |||||||
---|---|---|---|---|---|---|---|---|---|---|
0-50 cm | 0-100 cm | 0-200 cm | 0-300 cm | 0-50 cm | 0-100 cm | 0-200 cm | 0-300 cm | |||
高寒草原 Alpine steppe | 64.0 | 8.59 | 18.16 | 36.20 | 53.66 | 5.49 | 11.62 | 23.17 | 34.35 | |
高寒草甸 Alpine meadow | 50.4 | 5.48 | 12.29 | 26.12 | 39.58 | 2.76 | 6.20 | 13.16 | 19.95 | |
总计 Total | 114.4 | 7.22 | 15.58 | 31.76 | 47.46 | 8.26 | 17.82 | 36.33 | 54.29 |
Table 2 Summary of estimated soil inorganic carbon density (SICD) and soil inorganic carbon (SIC) stock in alpine grasslands on the Tibetan Plateau
草地类型 Grassland types | 面积 Area (104 km2) | SICD (kg C·m-2) | 无机碳库 SIC stock (Pg C) | |||||||
---|---|---|---|---|---|---|---|---|---|---|
0-50 cm | 0-100 cm | 0-200 cm | 0-300 cm | 0-50 cm | 0-100 cm | 0-200 cm | 0-300 cm | |||
高寒草原 Alpine steppe | 64.0 | 8.59 | 18.16 | 36.20 | 53.66 | 5.49 | 11.62 | 23.17 | 34.35 | |
高寒草甸 Alpine meadow | 50.4 | 5.48 | 12.29 | 26.12 | 39.58 | 2.76 | 6.20 | 13.16 | 19.95 | |
总计 Total | 114.4 | 7.22 | 15.58 | 31.76 | 47.46 | 8.26 | 17.82 | 36.33 | 54.29 |
Fig. 2 Spatial distributions of estimated soil inorganic carbon density (SICD) at different soil depths across alpine grasslands on the Tibetan Plateau at a resolution of 10 km × 10 km.
Fig. 3 Validation of the regression model of soil inorganic carbon density (SICD) between the depths of 0-30 cm and 0-50 cm (SICD0-50 cm = 1.7407SICD0-30 cm + 0.5068) constructed in the eastern Tibetan Plateau, using actual measurements in the western part of the plateau. The dashed line is 1:1 line.
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