Acta Prataculturae Sinica ›› 2022, Vol. 31 ›› Issue (5): 1-12.DOI: 10.11686/cyxb2021137
Wen-zhang GUO(), Chang-qing JING(), Xiao-jin DENG, Chen CHEN, Wei-kang ZHAO, Zhi-xiong HOU, Gong-xin WANG
Received:
2021-04-13
Revised:
2021-05-26
Online:
2022-05-20
Published:
2022-03-30
Contact:
Chang-qing JING
Wen-zhang GUO, Chang-qing JING, Xiao-jin DENG, Chen CHEN, Wei-kang ZHAO, Zhi-xiong HOU, Gong-xin WANG. Variations in carbon flux and factors influencing it on the northern slopes of the Tianshan Mountains[J]. Acta Prataculturae Sinica, 2022, 31(5): 1-12.
仪器名称 Name of instrument | 观测参数 Observation parameter | 安装高(深)度 Height (depth) of installation (m) |
---|---|---|
风速风向计Anemometer | 风速、风向Wind speed and direction | 3.0 |
光合有效辐射仪Photosynthetic active radiometer | 光合有效辐射Photosynthetic active radiation | 2.8 |
气压计Barometer | 空气压力Air pressure | 1.8 |
雨量筒Rain gauge | 降水量Precipitation | 2.5 |
土壤温度传感器Soil temperature sensor | 土壤温度Soil temperature | 土层Soil 0.05,0.2,0.4,0.7,1.0 |
土壤水分传感器Soil water sensor | 土壤含水量Soil water content | 土层Soil 0.05,0.2,0.4,0.7,1.0 |
温湿度传感器Temperature and humidity sensor | 气温、空气湿度Air temperature and air humidity | 0.2,2.0 |
Table 1 Instrument and device information of observation station (Micro meteorological observation system)
仪器名称 Name of instrument | 观测参数 Observation parameter | 安装高(深)度 Height (depth) of installation (m) |
---|---|---|
风速风向计Anemometer | 风速、风向Wind speed and direction | 3.0 |
光合有效辐射仪Photosynthetic active radiometer | 光合有效辐射Photosynthetic active radiation | 2.8 |
气压计Barometer | 空气压力Air pressure | 1.8 |
雨量筒Rain gauge | 降水量Precipitation | 2.5 |
土壤温度传感器Soil temperature sensor | 土壤温度Soil temperature | 土层Soil 0.05,0.2,0.4,0.7,1.0 |
土壤水分传感器Soil water sensor | 土壤含水量Soil water content | 土层Soil 0.05,0.2,0.4,0.7,1.0 |
温湿度传感器Temperature and humidity sensor | 气温、空气湿度Air temperature and air humidity | 0.2,2.0 |
项目Item | 月份Month | 拟合模型Fit model | R2 | P | Q10 |
---|---|---|---|---|---|
土壤温度 Soil temperature | 6月June | 0.552 | P<0.05 | 2.71 | |
7月July | 0.707 | P<0.01 | 2.09 | ||
8月August | 0.863 | P<0.01 | 1.85 | ||
9月September | 0.833 | P<0.01 | 1.94 | ||
10月October | 0.067 | P>0.05 | 2.11 | ||
空气温度 Air temperature | 6月June | 0.701 | P<0.05 | 2.53 | |
7月July | 0.971 | P<0.01 | 2.80 | ||
8月August | 0.881 | P<0.01 | 2.31 | ||
9月September | 0.914 | P<0.01 | 2.33 | ||
10月October | 0.067 | P>0.05 | 2.82 |
Table 2 Exponential regression between ecosystem respiration and temperature
项目Item | 月份Month | 拟合模型Fit model | R2 | P | Q10 |
---|---|---|---|---|---|
土壤温度 Soil temperature | 6月June | 0.552 | P<0.05 | 2.71 | |
7月July | 0.707 | P<0.01 | 2.09 | ||
8月August | 0.863 | P<0.01 | 1.85 | ||
9月September | 0.833 | P<0.01 | 1.94 | ||
10月October | 0.067 | P>0.05 | 2.11 | ||
空气温度 Air temperature | 6月June | 0.701 | P<0.05 | 2.53 | |
7月July | 0.971 | P<0.01 | 2.80 | ||
8月August | 0.881 | P<0.01 | 2.31 | ||
9月September | 0.914 | P<0.01 | 2.33 | ||
10月October | 0.067 | P>0.05 | 2.82 |
项目Item | 月份 Month | PAR | VPD | Ta | RH | Ts | SWC |
---|---|---|---|---|---|---|---|
NEE | 6月June | -0.85** | -0.74** | -0.71* | 0.67* | -0.60* | -0.54 |
7月July | -0.72* | -0.77* | -0.64* | 0.67* | -0.71* | -0.75** | |
8月August | -0.82** | -0.64* | -0.71* | 0.71* | -0.76** | -0.71* | |
9月September | -0.74** | -0.35 | -0.41 | 0.09 | -0.74* | -0.80** | |
10月October | 0.26 | 0.17 | -0.18 | -0.15 | 0.05 | -0.03 | |
ER | 6月June | 0.61* | 0.72* | 0.64* | -0.60* | 0.67* | 0.68* |
7月July | 0.39 | 0.96** | 0.94** | -0.86** | 0.83** | 0.75** | |
8月August | 0.97** | 0.93** | 0.89** | -0.83** | 0.88** | 0.91** | |
9月September | 0.86** | 0.96** | 0.94** | -0.80** | 0.92** | 0.87** | |
10月October | 0.01 | 0.30 | 0.30 | -0.39 | 0.30 | 0.26 |
Table 3 Correlation coefficients between NEE, ER and environmental factors
项目Item | 月份 Month | PAR | VPD | Ta | RH | Ts | SWC |
---|---|---|---|---|---|---|---|
NEE | 6月June | -0.85** | -0.74** | -0.71* | 0.67* | -0.60* | -0.54 |
7月July | -0.72* | -0.77* | -0.64* | 0.67* | -0.71* | -0.75** | |
8月August | -0.82** | -0.64* | -0.71* | 0.71* | -0.76** | -0.71* | |
9月September | -0.74** | -0.35 | -0.41 | 0.09 | -0.74* | -0.80** | |
10月October | 0.26 | 0.17 | -0.18 | -0.15 | 0.05 | -0.03 | |
ER | 6月June | 0.61* | 0.72* | 0.64* | -0.60* | 0.67* | 0.68* |
7月July | 0.39 | 0.96** | 0.94** | -0.86** | 0.83** | 0.75** | |
8月August | 0.97** | 0.93** | 0.89** | -0.83** | 0.88** | 0.91** | |
9月September | 0.86** | 0.96** | 0.94** | -0.80** | 0.92** | 0.87** | |
10月October | 0.01 | 0.30 | 0.30 | -0.39 | 0.30 | 0.26 |
环境因子 Environmental factor | 重要性排序 Order of importance | 贡献率 Contribution rate (%) | F值 F value | P值 P value |
---|---|---|---|---|
SWC (5 cm) | 1 | 41.7 | 37.8 | 0.002 |
Ta | 2 | 34.0 | 27.3 | 0.002 |
PAR | 3 | 32.1 | 27.3 | 0.002 |
VPD | 4 | 27.8 | 20.4 | 0.002 |
Ts (5 cm) | 5 | 24.0 | 16.7 | 0.002 |
RH | 6 | 13.4 | 8.2 | 0.002 |
Ts (20 cm) | 7 | 5.0 | 2.8 | 0.056 |
Ts (40 cm) | 8 | 4.4 | 2.4 | 0.090 |
SWC (40 cm) | 9 | 3.3 | 1.8 | 0.158 |
SWC (20 cm) | 10 | 0.2 | <0.1 | 0.954 |
Table 4 Explanation rate and significance test of environment factors
环境因子 Environmental factor | 重要性排序 Order of importance | 贡献率 Contribution rate (%) | F值 F value | P值 P value |
---|---|---|---|---|
SWC (5 cm) | 1 | 41.7 | 37.8 | 0.002 |
Ta | 2 | 34.0 | 27.3 | 0.002 |
PAR | 3 | 32.1 | 27.3 | 0.002 |
VPD | 4 | 27.8 | 20.4 | 0.002 |
Ts (5 cm) | 5 | 24.0 | 16.7 | 0.002 |
RH | 6 | 13.4 | 8.2 | 0.002 |
Ts (20 cm) | 7 | 5.0 | 2.8 | 0.056 |
Ts (40 cm) | 8 | 4.4 | 2.4 | 0.090 |
SWC (40 cm) | 9 | 3.3 | 1.8 | 0.158 |
SWC (20 cm) | 10 | 0.2 | <0.1 | 0.954 |
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