Table 4.
Rice yields and yield components for different nutrient management practices.
| Year | Site | Treatment | Spikelet number per panicle | Effective panicle number (m−2) | 1,000-grain weight (g) | Grain-filling rate (%) | Yield (Mg hm−2) |
|---|---|---|---|---|---|---|---|
| 2017 | WC | NPK | — | — | — | — | 9.13 a |
| NPK+SMg | — | — | — | — | 9.12 a | ||
| 2018 | WC | NPK | 70.87 b | 445.90 a | 30.67 a | 69.44 a | 6.93 ab |
| NPK+SMg | 72.92 b | 405.60 b | 30.69 a | 71.36 a | 6.75 b | ||
| NPK+FMg | 81.30 a | 445.90 a | 29.74 b | 66.63 a | 7.32 a | ||
| DX1 | NPK | 83.24 a | 615.00 a | 25.33 b | 79.40 a | 10.27 b | |
| NPK+FMg | 82.53 a | 625.83 a | 25.74 a | 80.50 a | 10.67 a | ||
| DX2 | NPK | 66.85 b | 661.21 a | 23.53 b | 89.90 a | 10.03 b | |
| NPK+FMg | 71.17 a | 648.69 a | 24.55 a | 91.92 a | 10.41 a | ||
| 2019 | DX2 | NPK | 76.71 b | 522.57 a | 26.33 b | 68.61 a | 6.51 b |
| NPK+FMg | 85.51 a | 496.87 b | 26.83 a | 77.35 a | 7.70 a |
NPK, Optimezed N, P, K fertilizer treatment; SMg, soil Mg application; FMg, foliar Mg application. Values are means ± standard errors of three biological replicates. Different letters following values within a column represent significant differences (P < 0.05) based on Duncan's test.