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4 秸秆还田耦合减量施氮对水稻生殖生长期叶片氮代谢关键酶活性的影响

Table 4 Effects of straw returning with nitrogen application reduction on key enzyme activities of nitrogen metabolism in leaves of rice at reproductive growth stages

生育期 Growth period 处理 Treatment 硝酸还原酶 Nitrate reductase [μmol/(h?g FW)] 谷氨酰胺合成酶 Glutamine synthetase [μmol/(h?g FW)] 亚硝酸还原酶 Nitrite reductase [μmol/(h?g FW)] 谷氨酸合成酶 Glutamate synthase [nmol/(h?g FW)] 可溶性蛋白 Soluble protein (mg/g FW) 抽穗期Heading stage CK 10.85±0.62bc 15.73±1.90c 16.01±0.89c 33.26±1.10d 47.31±3.43c N210-N 9.35±0.42c 16.22±1.70c 17.98±1.81bc 53.74±0.80a 50.75±2.27abc N210-M 16.13±0.96a 20.75±2.17ab 18.17±1.05abc 42.25±1.97b 54.62±3.03a N210-G 15.76±2.45a 17.71±3.05bc 19.96±1.02ab 41.77±0.88b 46.47±2.51c N260-N 12.99±0.00ab 16.47±1.43c 19.42±0.71ab 50.28±0.40a 48.60±2.88bc N260-M 14.06±0.85a 16.66±1.69c 20.48±1.41a 37.45±3.01c 53.45±3.94ab N260-G 16.12±2.68a 22.02±0.79a 17.69±1.53bc 33.81±0.98d 52.09±1.91abc 灌浆期Filling stage CK 11.36±0.64a 7.61±0.72d 16.89±0.70a 18.55±0.63e 83.58±2.96cd N210-N 12.06±0.08a 8.81±0.84cd 16.95±0.81a 20.42±0.64de 84.60±3.53bcd N210-M 12.43±1.25a 12.30±0.37a 14.33±0.72cd 26.81±1.33d 89.98±3.98b N210-G 12.07±0.29a 10.71±0.90ab 14.59±0.66c 29.38±0.42c 87.89±0.83bc N260-N 11.72±0.46a 9.65±1.64bc 16.53±0.23ab 22.93±1.25d 87.72±0.10bc N260-M 11.78±0.07a 12.45±0.80a 15.44±0.27bc 53.60±3.45a 97.27±2.35a N260-G 12.25±0.37a 11.96±0.59a 13.21±0.81d 48.23±1.31b 80.31±1.30d