|   指标  |       
  |       C  |       F4  |       F8  |       F12  |       F16  |       F20  |       F24  |    
|   干物质 (%)  |       初始值  |       79.23 ± 3.03  |       80.05 ± 4.14  |       79.31 ± 3.83  |       79.18 ± 4.26  |       79.88 ± 5.25  |       79.80 ± 4.35  |       79.34 ± 3.82  |    
|   末值  |       77.56 ± 3.26  |       78.81 ± 4.23  |       78.71 ± 4.55  |       77.94 ± 4.71  |       78.53 ± 3.94  |       77.83 ± 4.25  |       78.26 ± 4.57  |    |
|   氮 (‰干重)  |       初始值  |       0.32 ± 0.03  |       0.33 ± 0.05  |       0.32 ± 0.04  |       0.33 ± 0.02  |       0.33 ± 0.02  |       0.33 ± 0.04  |       0.33 ± 0.03  |    
|   末值  |       0.84 ± 0.05  |       0.87 ± 0.06  |       0.89 ± 0.03  |       0.88 ± 0.02  |       0.87 ± 0.05  |       0.85 ± 0.07  |       0.82 ± 0.04  |    |
|   磷 (‰干重)  |       初始值  |       0.21 ± 0.02  |       0.22 ± 0.03  |       0.21 ± 0.01  |       0.22 ± 0.02  |       0.22 ± 0.01  |       0.21 ± 0.02  |       0.22 ± 0.03  |    
|   末值  |       0.39 ± 0.05  |       0.40 ± 0.03  |       0.40 ± 0.02  |       0.41 ± 0.04  |       0.40 ± 0.02  |       0.38 ± 0.02  |       0.39 ± 0.05  |