Table 7.
Effects of nitrogen deficiency and compensation on dry matter accumulation and distribution in different organs in 2015.
| Treatments | Young panicle differentiation stage (g) |
Heading stage (g) |
Maturation stage (g) |
Stem and sheath output ratea (%) |
|||||
|---|---|---|---|---|---|---|---|---|---|
| Stem and sheath | Leaf | Stem and sheath | Leaf | Panicle | Stem and sheath | Leaf | Panicle | ||
| CK0 | 2.71a | 1.63b | 7.32b | 2.00b | 1.91b | 5.32c | 2.03c | 10.14c | 27.32b |
| CK1 | 4.28a | 3.03a | 14.15a | 4.17a | 3.75a | 10.78a | 4.66ab | 23.37ab | 23.82c |
| CK2 | 3.90a | 2.70a | 12.85a | 3.48a | 3.31a | 8.87b | 3.82b | 20.51b | 30.97a |
| T1 | 4.26a | 2.79a | 13.63a | 4.37a | 3.25a | 9.93ab | 4.72a | 24.73a | 27.15b |
CK0, N fertilizer was not supplied during all stages of growth (blank control); CK1, constant supply of N throughout different stages of growth; CK2, constant N compensation at young panicle differentiation stage, after N deficiency at tillering stage; T1, double N compensation at young panicle differentiation stage, after N deficiency at tillering stage. In 2015, values in the same column show the means via the Tukey’s multiple range test, and different letters indicate that the means were statistically different (P < 0.05), n = 4. Data are averages observed for the study year of 2015 (n = 3, 1 year × 3 replicates). aStem and sheath output rate = [stem and sheaths at the heading stage (dry weigh) – stem and sheaths at the maturation stage (dry weigh)]/stem and sheaths at the heading stage (dry weigh).