Table 3.
Aboveground plant biomass between grazing and non-grazing practices in northern China grasslands.
| Study and effect | Duration† | Statistics | ||||||
|---|---|---|---|---|---|---|---|---|
| Difference in means | Standard error | Variance | Lower limit | Upper limit | Z-value | p-value | ||
| (# of yrs) | ----------------------------------- (g m−2) -------------------------------- | |||||||
| Zhang et al. 2018c | 11 | 0.1 | 0.0 | 0.0 | 0.1 | 0.1 | 5.5 | 0.000 |
| Zhu et al. 2018 | 1 | 0.4 | 0.1 | 0.0 | 0.2 | 0.6 | 5.1 | 0.000 |
| Ren et al. 2012 | 25 | 3.1 | 0.6 | 0.4 | 1.9 | 4.3 | 5.1 | 0.000 |
| Ren et al. 2012 | 9 | 12.7 | 3.7 | 13.9 | 5.4 | 20.0 | 3.4 | 0.001 |
| Zhang et al. 2017 | 25 | 16.1 | 4.6 | 21.5 | 7.0 | 25.1 | 3.5 | 0.001 |
| Ren et al. 2012 | 9 | 17.5 | 4.2 | 18.0 | 9.2 | 25.8 | 4.1 | 0.000 |
| Zhang et al. 2017 | 5 | 41.5 | 12.0 | 143.4 | 18.0 | 64.9 | 3.5 | 0.001 |
| Zhao et al. 2007 | 25 | 52.6 | 7.8 | 60.3 | 37.4 | 67.8 | 6.8 | 0.000 |
| Zhang et al. 2017 | 9 | 71.0 | 20.5 | 420.2 | 30.8 | 111.2 | 3.5 | 0.001 |
| Zhang et al. 2018a | 2 | 104.0 | 18.4 | 339.1 | 68.0 | 140.1 | 5.7 | 0.000 |
| Zhang et al. 2018a | 2 | 107.9 | 18.7 | 350.2 | 71.2 | 144.5 | 5.8 | 0.000 |
| Zhang et al. 2018a | 2 | 112.6 | 19.9 | 394.3 | 73.7 | 151.5 | 5.7 | 0.000 |
| Zhang et al. 2018a | 2 | 112.6 | 20.8 | 434.2 | 71.8 | 153.5 | 5.4 | 0.000 |
| Zhang et al. 2018a | 2 | 112.7 | 20.4 | 416.7 | 72.7 | 152.7 | 5.5 | 0.000 |
| Zhang et al. 2018a | 2 | 128.5 | 22.8 | 519.2 | 83.8 | 173.1 | 5.6 | 0.000 |
| Zhang et al. 2018a | 2 | 128.5 | 22.8 | 520.2 | 83.8 | 173.2 | 5.6 | 0.000 |
| Zhang et al. 2018a | 2 | 131.7 | 23.8 | 564.7 | 85.1 | 178.2 | 5.5 | 0.000 |
| Zhang et al. 2018a | 2 | 136.4 | 24.3 | 588.7 | 88.9 | 184.0 | 5.6 | 0.000 |
| Zhang et al. 2018b | 2 | 143.0 | 31.9 | 1016.1 | 80.5 | 205.5 | 4.5 | 0.000 |
| Zhang et al. 2018a | 2 | 143.1 | 26.0 | 675.4 | 92.1 | 194.0 | 5.5 | 0.000 |
| Zhang et al. 2018a | 2 | 149.1 | 27.3 | 745.6 | 95.6 | 202.6 | 5.5 | 0.000 |
| Zhang et al. 2018a | 2 | 157.5 | 28.4 | 808.9 | 101.8 | 213.3 | 5.5 | 0.000 |
| Zhang et al. 2018a | 2 | 163.3 | 28.9 | 833.1 | 106.7 | 219.9 | 5.7 | 0.000 |
| Zhang et al. 2018a | 2 | 164.7 | 30.7 | 940.7 | 104.6 | 224.9 | 5.4 | 0.000 |
| Zhang et al. 2018a | 2 | 166.6 | 28.9 | 833.2 | 110.0 | 223.2 | 5.8 | 0.000 |
| Zhang et al. 2018a | 2 | 173.4 | 31.4 | 986.4 | 111.9 | 235.0 | 5.5 | 0.000 |
| Zhang et al. 2018a | 9 | 174.5 | 32.9 | 1080.4 | 110.1 | 238.9 | 5.3 | 0.000 |
| Zhang et al. 2018a | 2 | 174.9 | 31.2 | 972.9 | 113.7 | 236.0 | 5.6 | 0.000 |
| Zhang et al. 2018a | 2 | 189.3 | 33.3 | 1108.5 | 124.1 | 254.6 | 5.7 | 0.000 |
| Zhang et al. 2018a | 2 | 221.1 | 39.4 | 1551.7 | 143.9 | 298.3 | 5.6 | 0.000 |
| Mean (n = 232) | 6.67 | 0.84 | 0.70 | 5.02 | 8.31 | 7.94 | 0.000 | |
†The duration (number of years) of the treatments (Master tab24) or the number of samplings for the specific study.