Table 2. Simpson's index and Evenness of bacterial community.
| Experiment station | Growth stage | Variety(line) | Simpson's index | Evenness | ||
| 2011 | 2012 | 2011 | 2012 | |||
| Luhe | SS | N12-1 | 0.04±0.00a | 0.10±0.00a | 0.95±0.01a | 0.88±0.01a |
| Y158 | 0.04±0.00a | 0.12±0.00b | 0.95±0.01a | 0.86±0.02a | ||
| TS | N12-1 | 0.03±0.00a | 0.09±0.01a | 0.84±0.01a | 0.92±0.03a | |
| Y158 | 0.03±0.00a | 0.08±0.02a | 0.95±0.01a | 0.93±0.01a | ||
| GS | N12-1 | 0.03±0.00a | 0.04±0.01a | 0.95±0.00a | 0.93±0.01a | |
| Y158 | 0.03±0.00b | 0.05±0.01a | 0.96±0.01a | 0.93±0.02a | ||
| MS | N12-1 | 0.04±0.00a | 0.06±0.02a | 0.99±0.10a | 0.93±0.03a | |
| Y158 | 0.04±0.00a | 0.07±0.00a | 0.95±0.01a | 0.90±0.02a | ||
| Xinxiang | SS | N12-1 | 0.05±0.01a | 0.06±0.01a | 0.93±0.03a | 0.98±0.01a |
| Y158 | 0.05±0.01a | 0.06±0.01a | 0.95±0.01a | 1.00±0.01a | ||
| TS | N12-1 | 0.04±0.01a | 0.07±0.01a | 0.93±0.02a | 0.93±0.02a | |
| Y158 | 0.04±0.00a | 0.07±0.01a | 0.93±0.00a | 0.94±0.02a | ||
| GS | N12-1 | 0.03±0.00a | 0.11±0.02a | 0.95±0.01a | 0.92±0.03a | |
| Y158 | 0.03±0.00a | 0.08±0.01b | 0.95±0.01a | 0.96±0.01a | ||
| MS | N12-1 | 0.04±0.01a | 0.07±0.00a | 0.93±0.02a | 0.90±0.01a | |
| Y158 | 0.03±0.00a | 0.07±0.01a | 0.96±0.01b | 0.89±0.02a | ||
SS: seeding stage; TS: turngreen stage; GS: grainfilling stage; MS: maturing stage. The alphabets after the value represented the significance level of the index.