Chin J Plant Ecol ›› 2013, Vol. 37 ›› Issue (11): 988-997.DOI: 10.3724/SP.J.1258.2013.00102
Special Issue: 青藏高原植物生态学:植物-土壤-微生物
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XU Li1,2,YU Shu-Xia1,HE Nian-Peng2,*(),WEN Xue-Fa2,SHI Pei-Li2,ZHANG Yang-Jian2,DAI Jing-Zhong3,WANG Ruo-Meng2
Received:
2013-05-22
Accepted:
2013-10-05
Online:
2013-05-22
Published:
2013-11-06
Contact:
HE Nian-Peng
XU Li,YU Shu-Xia,HE Nian-Peng,WEN Xue-Fa,SHI Pei-Li,ZHANG Yang-Jian,DAI Jing-Zhong,WANG Ruo-Meng. Soil C mineralization and temperature sensitivity in alpine grasslands of the Qinghai-Xizang Plateau[J]. Chin J Plant Ecol, 2013, 37(11): 988-997.
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URL: https://www.plant-ecology.com/EN/10.3724/SP.J.1258.2013.00102
实验样点 Experimental site | 封育草地 Fenced grassland (FG) | 自由放牧草地 Grazing grassland (GG) | |||
---|---|---|---|---|---|
经度 Longitude (E) | 纬度 Latitude (N) | 经度 Longitude (E) | 纬度 Latitude (N) | ||
样点1 Site 1 | 91.973 1° | 31.383 5° | 91.962 4° | 31.376 4° | |
样点2 Site 2 | 91.723 8° | 31.619 2° | 91.719 8° | 31.608 2° | |
样点3 Site 3 | 91.907 8° | 32.302 9° | 91.910 5° | 32.305 0° | |
样点4 Site 4 | 90.459 8° | 31.364 4° | 90.399 0° | 31.374 5° | |
样点5 Site 5 | 90.055 3° | 31.497 4° | 90.055 6° | 31.497 8° | |
样点6 Site 6 | 90.244 1° | 31.391 1° | 90.244 4° | 31.391 4° | |
样点7 Site 7 | 86.653 3° | 32.337 9° | 86.653 6° | 32.338 2° | |
样点8 Site 8 | 86.796 9° | 31.752 9° | 86.797 2° | 31.753 2° | |
样点9 Site 9 | 85.839 5° | 31.924 6° | 85.840 0° | 31.924 9° | |
样点10 Site 10 | 82.910 0° | 32.380 9° | 82.910 6° | 32.381 2° | |
样点11 Site 11 | 81.828 2° | 32.074 8° | 81.828 4° | 32.075 3° |
Table 1 Geographical locations of experimental sites
实验样点 Experimental site | 封育草地 Fenced grassland (FG) | 自由放牧草地 Grazing grassland (GG) | |||
---|---|---|---|---|---|
经度 Longitude (E) | 纬度 Latitude (N) | 经度 Longitude (E) | 纬度 Latitude (N) | ||
样点1 Site 1 | 91.973 1° | 31.383 5° | 91.962 4° | 31.376 4° | |
样点2 Site 2 | 91.723 8° | 31.619 2° | 91.719 8° | 31.608 2° | |
样点3 Site 3 | 91.907 8° | 32.302 9° | 91.910 5° | 32.305 0° | |
样点4 Site 4 | 90.459 8° | 31.364 4° | 90.399 0° | 31.374 5° | |
样点5 Site 5 | 90.055 3° | 31.497 4° | 90.055 6° | 31.497 8° | |
样点6 Site 6 | 90.244 1° | 31.391 1° | 90.244 4° | 31.391 4° | |
样点7 Site 7 | 86.653 3° | 32.337 9° | 86.653 6° | 32.338 2° | |
样点8 Site 8 | 86.796 9° | 31.752 9° | 86.797 2° | 31.753 2° | |
样点9 Site 9 | 85.839 5° | 31.924 6° | 85.840 0° | 31.924 9° | |
样点10 Site 10 | 82.910 0° | 32.380 9° | 82.910 6° | 32.381 2° | |
样点11 Site 11 | 81.828 2° | 32.074 8° | 81.828 4° | 32.075 3° |
实验样点 Experimental site | 优势植被 Dominant vegetation | 土地利用方式 Land-use type | 有机碳含量 Organic carbon content (g·kg-1) | 全氮含量 Total nitrogen content (g·kg-1) | pH |
---|---|---|---|---|---|
样点1 Site 1 | 高山嵩草 | 封育草地 Fenced grassland | 19.04 ± 0.04a | 1.52 ± 0.02a | 8.04 ± 0.12a |
Kobresia pygmaea | 自由放牧草地 Grazing grassland | 10.30 ± 0.01b | 0.94 ± 0.01b | 8.33 ± 0.36a | |
样点2 Site 2 | 高山嵩草 | 封育草地 Fenced grassland | 24.42 ± 0.08a | 1.91 ± 0.03a | 8.56 ± 0.52a |
K. pygmaea | 自由放牧草地 Grazing grassland | 13.31 ± 0.02b | 1.21 ± 0.08b | 7.77 ± 0.48a | |
样点3 Site 3 | 高山嵩草 | 封育草地 Fenced grassland | 11.76 ± 0.01a | 1.05 ± 0.00a | 8.43 ± 0.05a |
K. pygmaea | 自由放牧草地 Grazing grassland | 11.12 ± 0.01b | 1.13 ± 0.01b | 7.78 ± 0.41a | |
样点4 Site 4 | 紫花针茅 | 封育草地 Fenced grassland | 12.27 ± 0.03a | 1.18 ± 0.03a | 7.79 ± 0.57a |
Stipa purpurea | 自由放牧草地 Grazing grassland | 10.23 ± 0.01b | 1.09 ± 0.03b | 8.38 ± 0.19a | |
样点5 Site 5 | 紫花针茅和羊草 | 封育草地 Fenced grassland | 10.31 ± 0.09a | 1.04 ± 0.04a | 9.07 ± 0.02a |
S. purpurea and Leymus chinensis | 自由放牧草地 Grazing grassland | 8.92 ± 0.07a | 1.14 ± 0.05b | 8.53 ± 0.55a | |
样点6 Site 6 | 紫花针茅 | 封育草地 Fenced grassland | 8.96 ± 0.06a | 0.97 ± 0.01a | 7.83 ± 0.30a |
S. purpurea | 自由放牧草地 Grazing grassland | 12.17 ± 0.03b | 1.21 ± 0.03b | 8.33 ± 0.22a | |
样点7 Site 7 | 紫花针茅 | 封育草地 Fenced grassland | 6.40 ± 0.16a | 0.71 ± 0.04a | 9.94 ± 0.01a |
S. purpurea | 自由放牧草地 Grazing grassland | 3.95 ± 0.06b | 0.70 ± 0.03a | 10.09 ± 0.02b | |
样点8 Site 8 | 紫花针茅 | 封育草地 Fenced grassland | 13.36 ± 0.13a | 2.14 ± 0.05a | 8.73 ± 0.03a |
S. purpurea | 自由放牧草地 Grazing grassland | 10.14 ± 0.13b | 1.39 ± 0.08b | 8.53 ± 0.03b | |
样点9 Site 9 | 紫花针茅和薹草 | 封育草地 Fenced grassland | 6.70 ± 0.31a | 0.99 ± 0.03a | 9.28 ± 0.03a |
S. purpurea and Carex moorcroftii | 自由放牧草地 Grazing grassland | 6.91 ± 0.10a | 1.03 ± 0.09a | 8.94 ± 0.04b | |
样点10 Site 10 | 沙生针茅和羽状针茅 | 封育草地 Fenced grassland | 17.40 ± 0.13a | 1.23 ± 0.05a | 8.62 ± 0.09a |
S. purpurea and S. pennata | 自由放牧草地 Grazing grassland | 11.89 ± 0.16b | 0.94 ± 0.02b | 8.82 ± 0.03b | |
样点11 Site 11 | 沙生针茅和羽状针茅 | 封育草地 Fenced grassland | 3.76 ± 0.31a | 0.59 ± 0.06a | 9.12 ± 0.01a |
S. purpurea and S. pennata | 自由放牧草地 Grazing grassland | 6.55 ± 0.17a | 0.79 ± 0.06b | 9.05 ± 0.03b |
Table 2 The dominant vegetation and soil properties on experimental sites (mean ± SD, n = 4)
实验样点 Experimental site | 优势植被 Dominant vegetation | 土地利用方式 Land-use type | 有机碳含量 Organic carbon content (g·kg-1) | 全氮含量 Total nitrogen content (g·kg-1) | pH |
---|---|---|---|---|---|
样点1 Site 1 | 高山嵩草 | 封育草地 Fenced grassland | 19.04 ± 0.04a | 1.52 ± 0.02a | 8.04 ± 0.12a |
Kobresia pygmaea | 自由放牧草地 Grazing grassland | 10.30 ± 0.01b | 0.94 ± 0.01b | 8.33 ± 0.36a | |
样点2 Site 2 | 高山嵩草 | 封育草地 Fenced grassland | 24.42 ± 0.08a | 1.91 ± 0.03a | 8.56 ± 0.52a |
K. pygmaea | 自由放牧草地 Grazing grassland | 13.31 ± 0.02b | 1.21 ± 0.08b | 7.77 ± 0.48a | |
样点3 Site 3 | 高山嵩草 | 封育草地 Fenced grassland | 11.76 ± 0.01a | 1.05 ± 0.00a | 8.43 ± 0.05a |
K. pygmaea | 自由放牧草地 Grazing grassland | 11.12 ± 0.01b | 1.13 ± 0.01b | 7.78 ± 0.41a | |
样点4 Site 4 | 紫花针茅 | 封育草地 Fenced grassland | 12.27 ± 0.03a | 1.18 ± 0.03a | 7.79 ± 0.57a |
Stipa purpurea | 自由放牧草地 Grazing grassland | 10.23 ± 0.01b | 1.09 ± 0.03b | 8.38 ± 0.19a | |
样点5 Site 5 | 紫花针茅和羊草 | 封育草地 Fenced grassland | 10.31 ± 0.09a | 1.04 ± 0.04a | 9.07 ± 0.02a |
S. purpurea and Leymus chinensis | 自由放牧草地 Grazing grassland | 8.92 ± 0.07a | 1.14 ± 0.05b | 8.53 ± 0.55a | |
样点6 Site 6 | 紫花针茅 | 封育草地 Fenced grassland | 8.96 ± 0.06a | 0.97 ± 0.01a | 7.83 ± 0.30a |
S. purpurea | 自由放牧草地 Grazing grassland | 12.17 ± 0.03b | 1.21 ± 0.03b | 8.33 ± 0.22a | |
样点7 Site 7 | 紫花针茅 | 封育草地 Fenced grassland | 6.40 ± 0.16a | 0.71 ± 0.04a | 9.94 ± 0.01a |
S. purpurea | 自由放牧草地 Grazing grassland | 3.95 ± 0.06b | 0.70 ± 0.03a | 10.09 ± 0.02b | |
样点8 Site 8 | 紫花针茅 | 封育草地 Fenced grassland | 13.36 ± 0.13a | 2.14 ± 0.05a | 8.73 ± 0.03a |
S. purpurea | 自由放牧草地 Grazing grassland | 10.14 ± 0.13b | 1.39 ± 0.08b | 8.53 ± 0.03b | |
样点9 Site 9 | 紫花针茅和薹草 | 封育草地 Fenced grassland | 6.70 ± 0.31a | 0.99 ± 0.03a | 9.28 ± 0.03a |
S. purpurea and Carex moorcroftii | 自由放牧草地 Grazing grassland | 6.91 ± 0.10a | 1.03 ± 0.09a | 8.94 ± 0.04b | |
样点10 Site 10 | 沙生针茅和羽状针茅 | 封育草地 Fenced grassland | 17.40 ± 0.13a | 1.23 ± 0.05a | 8.62 ± 0.09a |
S. purpurea and S. pennata | 自由放牧草地 Grazing grassland | 11.89 ± 0.16b | 0.94 ± 0.02b | 8.82 ± 0.03b | |
样点11 Site 11 | 沙生针茅和羽状针茅 | 封育草地 Fenced grassland | 3.76 ± 0.31a | 0.59 ± 0.06a | 9.12 ± 0.01a |
S. purpurea and S. pennata | 自由放牧草地 Grazing grassland | 6.55 ± 0.17a | 0.79 ± 0.06b | 9.05 ± 0.03b |
样点 Site | 培养7天 | 培养56天 | |||
---|---|---|---|---|---|
Incubation for 7 d | Incubation for 56 d | ||||
D 值 | p值 | D 值 | p值 | ||
D value | p value | D value | p value | ||
(μg C·g-1 soil) | (μg C·g-1 soil) | ||||
样点1 Site 1 | 25.92 | 0.023 | 148.99 | 0.012 | |
样点2 Site 2 | 39.38 | 0.02 | 218.41 | 0.018 | |
样点3 Site 3 | -0.63 | 0.8 | -41.79 | 0.091 | |
样点4 Site 4 | 7.68 | 0.008 | 50.23 | 0.011 | |
样点5 Site 5 | 9.96 | 0.003 | 70.45 | 0.006 | |
样点6 Site 6 | -9.81 | 0.01 | -85.59 | 0.003 | |
样点7 Site 7 | 1.7 | 0.047 | 31.94 | 0.123 | |
样点8 Site 8 | 3.75 | 0.325 | 69.53 | 0.005 | |
样点9 Site 9 | 5.75 | 0.064 | 58.81 | 0.009 | |
样点10 Site 10 | 15.86 | 0 | 63.21 | 0.009 | |
样点11 Site 11 | -8.36 | 0.024 | -80.58 | 0.012 |
Table 3 Comparison of soil C mineralization across experimental sites
样点 Site | 培养7天 | 培养56天 | |||
---|---|---|---|---|---|
Incubation for 7 d | Incubation for 56 d | ||||
D 值 | p值 | D 值 | p值 | ||
D value | p value | D value | p value | ||
(μg C·g-1 soil) | (μg C·g-1 soil) | ||||
样点1 Site 1 | 25.92 | 0.023 | 148.99 | 0.012 | |
样点2 Site 2 | 39.38 | 0.02 | 218.41 | 0.018 | |
样点3 Site 3 | -0.63 | 0.8 | -41.79 | 0.091 | |
样点4 Site 4 | 7.68 | 0.008 | 50.23 | 0.011 | |
样点5 Site 5 | 9.96 | 0.003 | 70.45 | 0.006 | |
样点6 Site 6 | -9.81 | 0.01 | -85.59 | 0.003 | |
样点7 Site 7 | 1.7 | 0.047 | 31.94 | 0.123 | |
样点8 Site 8 | 3.75 | 0.325 | 69.53 | 0.005 | |
样点9 Site 9 | 5.75 | 0.064 | 58.81 | 0.009 | |
样点10 Site 10 | 15.86 | 0 | 63.21 | 0.009 | |
样点11 Site 11 | -8.36 | 0.024 | -80.58 | 0.012 |
源 Source | 培养7天的土壤碳矿化累积量 Accumulative soil C mineralization over a 7-day duration | 培养56天的土壤碳矿化累积量 Accumulative soil C mineralization over a 56-day duration | |||
---|---|---|---|---|---|
F值 F value | p值 p value | F值 F value | p值 p value | ||
土地利用方式 Land use type (L) | 24.086 | <0.000 1 | 19.695 | <0.000 1 | |
温度 Temperature (T) | 138.987 | <0.000 1 | 112.975 | <0.000 1 | |
L × T | 1.282 | 0.276 | 0.763 | 0.550 |
Table 4 Effects of land use type and incubation temperature on the accumulative soil C mineralization
源 Source | 培养7天的土壤碳矿化累积量 Accumulative soil C mineralization over a 7-day duration | 培养56天的土壤碳矿化累积量 Accumulative soil C mineralization over a 56-day duration | |||
---|---|---|---|---|---|
F值 F value | p值 p value | F值 F value | p值 p value | ||
土地利用方式 Land use type (L) | 24.086 | <0.000 1 | 19.695 | <0.000 1 | |
温度 Temperature (T) | 138.987 | <0.000 1 | 112.975 | <0.000 1 | |
L × T | 1.282 | 0.276 | 0.763 | 0.550 |
Fig. 2 Relationships of soil C mineralization with soil organic carbon content (SOC), soil total nitrogen content (STN) and aboveground biomass of plants.
Fig. 4 Relationships of temperature sensitivity (Q10) with soil organic carbon content (SOC), soil total nitrogen content (STN) and aboveground biomass of plants.
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