Table 2.
Statistics of leaf nitrogen concentrations of different cultivars.
| Year | Sample Subset | Cultivar | Sample Number | Leaf Nitrogen Concentration (g kg−1) | ||
|---|---|---|---|---|---|---|
| Min. | Max. | Mean † | ||||
| 2015 | Gaochun | Kotobuki Shinsui | 160 | 12.7 | 35.7 | 23.7 ± 5.0b |
| Yixing | Cuiguan | 200 | 21.0 | 42.0 | 29.6 ± 4.5a | |
| Xinji | Huangguan | 189 | 22.5 | 36.9 | 29.5 ± 2.7a | |
| Xinji | Yali | 193 | 16.7 | 29.7 | 23.6 ± 2.3b | |
| Xinji | Yuanhuang | 197 | 21.4 | 35.6 | 26.7 ± 2.6ab | |
| 2016 | Pengzhou | Cuiguan | 96 | 21.7 | 38.5 | 28.0 ± 3.6a |
| Xuzhou | Huangguan | 40 | 25.5 | 32.3 | 28.8 ± 1.5a | |
| Xuzhou | Yuanhuang | 46 | 22.1 | 32.2 | 26.9 ± 2.6ab | |
| Xinji | Huangguan | 49 | 26.3 | 33.0 | 28.0 ± 1.5a | |
| Xinji | Yali | 35 | 22.4 | 31.1 | 25.9 ± 2.1b | |
| Jingtai | Huangguan | 80 | 22.6 | 32.4 | 28.5 ± 2.3a | |
† Values were expressed as mean ± SD. Different letters indicated the significantly different of groups by the least significant difference (LSD) multiple range test (p < 0.05) in SPSS 18.0 software.