Table 3. Effects of different tillage depths on rice stems.
| Treatment | Plant height (cm) | Center of height (cm) | Fresh weight of single stem (g) | N1 | N2 | N3 | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| INL (cm) | SD (mm) | ULDW (g/cm) | INL (cm) | SD (mm) | ULDW (g/cm) | INL (cm) | SD (mm) | ULDW (g/cm) | ||||
| TD14 | 104.61a | 57.53ab | 15.11ab | 3.53a | 5.32b | 0.024b | 10.62a | 4.71c | 0.019b | 15.07a | 4.31b | 0.015b |
| TD17 | 104.79a | 58.83a | 15.38ab | 3.08b | 5.75a | 0.034a | 9.63c | 5.33a | 0.027a | 14.63b | 4.80a | 0.020a |
| TD20 | 103.57ab | 57.16ab | 16.14a | 3.02b | 5.91a | 0.036a | 9.99bc | 5.16ab | 0.025ab | 14.45b | 4.61ab | 0.019a |
| TD23 | 101.43b | 56.01b | 14.79b | 2.86b | 5.64a | 0.031ab | 10.39ab | 4.91bc | 0.022ab | 14.32b | 4.45ab | 0.016b |
| Y | ns | ns | ns | ns | ns | ns | ns | ns | ns | ns | ns | ns |
| TD | * | ns | ns | * | ns | ns | ns | * | ns | * | * | ns |
| Y*TD | ns | ns | ns | ns | ns | ns | ns | ns | ns | ns | ns | ns |
Note:
Different letters in the same row within the same rice means the significant differences in P < 0.05. * indicate significant correlations at the 0.05 levels. TD, tillage depth; TD14, tillage depth 14 cm; TD17, tillage depth 17 cm; TD20, tillage depth 20 cm; TD 23, tillage depth 23 cm; Y, year. N1, first node; N2, second node; N3, third node; INL, internode length; SD, stem diameter, ULDW, unit length dry weight.