秸秆还田下氮肥减量对辽河平原水稻产量及氮素利用的影响

金丹丹, 隋世江, 陈玥, 李波, 曲航, 宫亮

Effects of Straw Returning with Nitrogen Application Reduction on Yield and Nitrogen Utilization of Rice in Liaohe Plain

Jin Dandan, Sui Shijiang, Chen Yue, Li Bo, Qu Hang, Gong Liang

表3 秸秆还田耦合减量施氮对水稻产量及其构成因子的影响

Table 3 Effects of straw returning with nitrogen application reduction on rice yield and its components

因素 Factor 处理 Treatment 有效穗数 Number of efficient panicles (×104 /hm2) 每穗实粒数 Grain number per panicle 结实率 Seed-setting rate (%) 千粒重 1000-grain weight (g) 产量 Yield (t/hm2) 施氮量 N level (kg/hm2) N210 311.27±69.91 114.20±12.06 94.50±2.48 26.19±1.10b 12.60±1.22 N260 310.38±62.93 115.59±12.08 94.76±2.40 25.51±0.68b 13.57±1.26 F值 0.00ns 0.05ns 0.04ns 2.49ns 2.75ns 还田方式 Straw returning method N 317.49±50.33 116.60±15.07 95.98±1.85 26.47±0.53a 11.93±1.05 M 310.82±68.66 111.14±11.73 94.38±2.87 25.81±1.24ab 13.33±0.91* G 304.15±78.01 117.00±10.60 93.26±1.80 25.28±0.66b 14.00±1.07* F值 0.30ns 0.36ns 2.13ns 2.84ns 6.52* 施氮量× 还田方式 N level×straw returning method N210-N 317.49±54.47 107.00±11.17 94.86±2.13* 26.92±0.16a 11.44±0.59 N210-M 317.49±47.75 105.95±13.22 96.15±1.93* 26.51±1.33ab 12.94±0.91 N210-G 293.48±65.79 124.50±2.78 91.51±0.54 25.15±0.70b 13.43±1.25 N260-N 328.16±69.23 126.20±13.72 97.10±0.48* 26.02±0.26ab 12.42±1.31 N260-M 322.83±86.85 114.60±11.95 91.74±1.48 25.11±0.77b 13.72±0.88 N260-G 285.48±65.70 109.50±10.22 94.42±1.13 25.41±0.75b 14.57±0.54* F值 1.01ns 1.63ns 5.61* 2.93ns 3.84*