Table 2.
Vascular bundle and air chambers of the N4 internode culm in two japonica rice cultivars under different nitrogen rates
| Treatments | NLVB | ALVB (μm2) | NSVB | ASVB (μm2) | NAC | AAC (μm2) |
|---|---|---|---|---|---|---|
| Wuyunjing23 | ||||||
| LN | 32.2a | 21032.0a | 32.8a | 5594.5a | 29.0a | 21099.7a |
| MN | 32.6a | 19726.4a | 31.3b | 4706.5b | 29.0a | 21215.2a |
| HN | 32.0a | 16109.8b | 32.5a | 4245.1b | 29.5a | 22507.0a |
| W3668 | ||||||
| LN | 29.6a | 14002.8a | 27.8a | 3213.6a | 27.2a | 11850.3a |
| MN | 29.3a | 12986.7a | 28.6a | 2846.5a | 26.2a | 12072.6a |
| HN | 28.8a | 12706.5a | 27.2a | 2440.6b | 26.8a | 12915.9a |
| Analysis of variance | ||||||
| Variety (V) | 171.5b | 139.6b | 160.1b | 598.8b | 14.7b | 64.1b |
| Nitrogen (N) | 2.5 | 14.0b | 0.7 | 32.0b | 0.3 | 2.1 |
| V × N | 1.2 | 5.7a | 6.0a | 13.0b | 0.2 | 0.6 |
Different lowercase letters represent a significant difference at the 0.05 level
Abbreviations: NLVB number of large vascular bundles, ALVB area of large vascular bundles, NSVB, number of small vascular bundles, ASVB area of small vascular bundles, NAC number of air chambers, AAC area of air chambers
a, b Means significant at the 0.05 and 0.01 probability levels, respectively