Table 3.
Analysis of variance of yield under nitrogen deficiency and compensation.
| SV | DF | SS | MS | F-value | F0.05 | F0.01 |
|---|---|---|---|---|---|---|
| Replication | 4 | 16.33 | 4.08 | 1.02ns | 2.71 | 4.07 |
| Treatments | 7 | 1346.84 | 192.41 | 47.88∗∗ | 2.36 | 3.36 |
| Year (Y) | 1 | 20.87 | 20.87 | 5.19∗ | 4.2 | 7.64 |
| A | 3 | 1322.14 | 440.71 | 109.67∗∗ | 2.95 | 4.57 |
| Y × A | 3 | 3.83 | 1.28 | 0.32ns | 2.95 | 4.57 |
| Error | 28 | 112.52 | 4.02 | |||
| Total | 39 | 1475.69 |
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. SV, source of variation; DF, degrees of freedom; SS, sum of square; MS, mean square; F, variance ratio; Y, year; A, nitrogen deficiency and compensation treatments; ∗P < 0.05; ∗∗P < 0.01; ns, not significantly different.