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1 2019和2020年试验区耕层土壤（0~20 cm）理化性质

Table 1 Physicochemical properties of topsoil (0-20 cm) of experimental area in 2019 and 2020

年份 Year pH 有机质 Organic matter (g/kg) 全氮 Total N (g/kg) 速效氮 Rapidly available N (mg/kg) 全磷 Total P (g/kg) 有效磷 Available P (mg/kg) 全钾 Total K (g/kg) 有效钾 Available K (mg/kg) 2019 7.43 23.62 1.46 115.33 1.22 38.86 24.00 239.00 2020 7.41 23.35 1.42 114.43 1.18 43.89 27.34 228.33