稻麦复种模式下氮肥与稻秸互作对小麦产量和N2O排放影响及推荐施肥研究

陆汝华, 王文轩, 曹强, 田永超, 朱艳, 曹卫星, 刘小军

Research on the effects of nitrogen fertilizer and rice straw return on wheat yield and N2O emission and recommended fertilization under rice-wheat rotation pattern

LU Ru-Hua, WANG Wen-Xuan, CAO Qiang, TIAN Yong-Chao, ZHU Yan, CAO Wei-Xing, LIU Xiao-Jun

表1 田间管理措施、生态因子与N2O排放量的描述统计

Table 1 Descriptive statistics of field management practices, ecological factors and N2O emission

指标 Indicator 最小值 Min. 最大值 Max. 平均值 Mean 标准偏差 SD 标准差系数 CV (%) N rate 0 300 181.89 82.29 45.24 Split N 1 3 2.63 0.50 19.19 Straw rate 0 8.25 1.45 2.40 164.83 pH 5.88 8.09 6.79 0.64 9.43 SOM (g kg-1) 11.00 57.90 20.42 7.78 38.10 TN (g kg-1) 0.51 2.90 1.53 0.46 30.06 LT_Temp (℃) 15.10 19.95 15.96 0.46 2.89 LT_Prec (mm) 750.00 1890.30 1117.32 174.31 15.60 Cum_N2O (kg hm-2) 0.13 7.74 2.42 1.98 81.82