Table 5.
ANOVA of grain yield, yield components, HI, and DM accumulation under each water-nitrogen mode experiment (cultivar Aikang 58).
| Location | Treatment∗ | Yield | GN | TGW | HI | DMA | DMM | DMAM | TDM |
|---|---|---|---|---|---|---|---|---|---|
| Shangshui | W0N0 | 3956.77e | 9.49d | 48.23ab | 0.34b | 8616.36c | 11684.75d | 3068.39d | 888.38e |
| W0N180 | 5733.47c | 14.51bc | 46.52ab | 0.43a | 9853.93bc | 13425.55cd | 3671.58cd | 2161.84cd | |
| W0N240 | 5890.90c | 14.29bc | 46.71ab | 0.40a | 10825.34b | 14651.13c | 3792.50bcd | 2065.11cd | |
| W0N300 | 6453.04c | 15.69b | 49.01a | 0.43a | 11156.87b | 15238.30c | 4081.43bc | 2371.61bc | |
| W1N0 | 4954.68d | 12.67c | 49.84a | 0.39a | 9117.81c | 12638.72d | 3520.90cd | 1433.77de | |
| W1N180 | 7283.04b | 19.57a | 47.23ab | 0.41a | 13146.15a | 17727.23b | 4100.26bc | 2701.97abc | |
| W1N240 | 8076.29a | 21.66a | 44.86b | 0.43a | 14202.48a | 18908.55ab | 4556.94ab | 3370.22a | |
| W1N300 | 8126.02a | 20.98a | 46.40ab | 0.42a | 14520.23a | 19607.21a | 5031.49a | 3039.05ab | |
| Wenxian | W0N0 | 3758.05e | 8.19d | 50.92a | 0.34b | 8178.96e | 11172.37e | 2993.41g | 764.6d |
| W0N180 | 6506.46bc | 15.75b | 45.58c | 0.42a | 10686.75cd | 15345.41bc | 4658.66bcd | 1847.80c | |
| W0N240 | 6233.01c | 16.77b | 46.81bc | 0.42a | 10841.07cd | 15058.80bc | 4217.73cde | 2015.28bc | |
| W0N300 | 6541.63bc | 17.33b | 46.11bc | 0.43a | 11482.79cd | 15246.02bc | 3871.63def | 2778.40ab | |
| W1N0 | 4493.83de | 11.20cd | 49.61ab | 0.35b | 9841.63de | 12896.00de | 3087.72fg | 1439.46cd | |
| W1N180 | 7311.11b | 21.20a | 44.51c | 0.43a | 12499.05bc | 17072.83b | 4573.78bcde | 2737.33ab | |
| W1N240 | 8456.60a | 20.87a | 45.83c | 0.42a | 14586.38a | 20255.81a | 5024.96abc | 2787.16ab | |
| W1N300 | 8319.03a | 20.81a | 46.51bc | 0.42a | 14748.87a | 19809.18a | 4714.66bcd | 3258.72a | |
| W2N0 | 5222.99d | 13.92bc | 47.87abc | 0.38ab | 9996.08de | 13744.44cd | 3748.36efg | 1474.63cd | |
| W2N180 | 8247.55a | 20.58a | 45.23c | 0.43a | 14249.06ab | 19451.20a | 4913.26abc | 3045.41a | |
| W2N240 | 8653.38a | 22.74a | 46.12bc | 0.42a | 15121.30a | 20456.89a | 5291.18ab | 3317.79a | |
| W2N300 | 8489.27a | 23.37a | 44.48c | 0.42a | 14675.56a | 20315.70a | 5636.83a | 2849.12ab |
∗Experimental treatments consisted of: no irrigation under four N rates (0,180, 240, and 300 N kg ha-1; W0N0, W0N180, W0N240, and W0N300); single irrigation at jointing under four N rates (W1N0, W1N180, W1N240, and W1N300); and irrigation at jointing plus anthesis under four N rates (W2N0, W2N180, W2N240, and W2N300). GN, grain number per unit area (103⋅m-2); TGW, thousand grain weight (g); HI, harvest index; DMA, dry matter at anthesis (kg ha-1); DMM, dry matter at maturity (kg ha-1); DMAM, dry matter accumulation from anthesis to maturity (kg ha-1); TDM, dry matter translocation amount after anthesis (kg ha-1).