|    |  | 净辐射 Rn
 | 大气温度 T
 | 相对湿度 RH
 | 水气压差VPD | 风速 Ws
 | 5 cm土温 Ts,5
 | 10 cm 土温Ts,10
 | 20 cm 土温Ts,20
 | 30 cm 土温Ts,30
 | 40 cm 土温Ts,40
 | 茎流速率 Sap velocity
 |   | 净辐射Rn | 1 |  |  |  |  |  |  |  |  |  |  |   | 大气温度T | 0.613** | 1 |  |  |  |  |  |  |  |  |  |   | 相对湿度RH | -0.533** | -0.731** | 1 |  |  |  |  |  |  |  |  |   | 水气压差VPD | 0.609** | 0.920** | -0.926** | 1 |  |  |  |  |  |  |  |   | 风速Ws | 0.622** | 0.431** | -0.566** | 0.548** | 1 |  |  |  |  |  |  |   | 5 cm土温Ts,5 | 0.114* | 0.742** | -0.494** | 0.687** | 0.148** | 1 |  |  |  |  |  |   | 10 cm土温Ts,10 | -0.121* | 0.571** | -0.339** | 0.511** | -0.010 | 0.954** | 1 |  |  |  |  |   | 20 cm土温Ts,20 | -0.315** | 0.321** | -0.119* | 0.256** | -0.180** | 0.791** | 0.935** | 1 |  |  |  |   | 30 cm土温Ts,30 | -0.308** | 0.039 | 0.123* | -0.025 | -0.262** | 0.458** | 0.660** | 0.864** | 1 |  |  |   | 40 cm土温Ts,40 | -0.094 | 0.025 | 0.099 | -0.020 | -0.145** | 0.268** | 0.428** | 0.637** | 0.915** | 1 |  |   | 茎流速率 Sap velocity
 | 0.852** | 0.656** | -0.557** | 0.616** | 0.619** | 0.132** | -0.078 | -0.281** | -0.347** | -0.173** | 1 |  |