Table 2. Soil microorganisms under potato–legume rotation systems.
| Years of continuous cropping | Crop rotation | Bacteria (×106 CFU /g) | Fungi (×103 CFU /g) | Actinomycetes (105 CFU /g) |
|---|---|---|---|---|
| One | ||||
| P–C | 144.4 a | 37.5 a | 49.7 a | |
| P–B | 128.1 ab | 12.7 b | 15.7 b | |
| P–L | 124.4 b | 38.7 a | 27.5 b | |
| Two | ||||
| P–C | 115.5 b | 8.1 b | 26.3 b | |
| P–B | 205.7 a | 17.0 a | 48.2 a | |
| P–L | 120.3 b | 24.5 a | 48.1 a | |
| Three | ||||
| P–C | 107.1 a | 45.3 a | 31.7 b | |
| P–B | 139.8 a | 22.5 b | 15.0 c | |
| P–L | 130.1 a | 28.3 b | 51.9 a | |
| Four | ||||
| P–C | 119.3 b | 26.0 b | 14.6 b | |
| P–B | 221.2 a | 43.0 a | 17.6 ab | |
| P–L | 180.2 ab | 35.1 a | 20.4 a | |
| Seven | ||||
| P–C | 122.0 b | 64.4 a | 4.2 b | |
| P–B | 223.1 a | 33.2 b | 5.7 b | |
| P–L | 221.0a | 4.4 c | 20.1 a |
Note: Different letters in the column meant significant difference among treatments at p <0.05. P–C, P–B and P–L refer to Potato–Common vetch, Potato–Black medic and Potato–Longdong alfalfa, respectively.