滴灌施肥对两种典型作物系统土壤N2O排放的影响及其调控差异

雷豪杰,李贵春,柯华东,魏崃,丁武汉,徐驰,李虎

Analysis of Impacts and Regulation Differences on Soil N2O Emissions from Two Typical Crop Systems Under Drip Irrigation and Fertilization

LEI HaoJie,LI GuiChun,KE HuaDong,WEI Lai,DING WuHan,XU Chi,LI Hu

表3 设施蔬菜系统和粮食作物系统各处理季度N2O累积排放总量及排放系数

Table 3 Cumulative emissions and emission coefficients of the facility vegetable system and food crop system

处理 Treatment 设施菜地系统 Facility vegetable system 粮食作物系统 Food crop system 排放总量 Cumulative emissions (kg N·hm-2) 排放系数 Emission coefficient (%) 排放总量 Cumulative emissions (kg N·hm-2) 排放系数 Emission coefficient (%) CK 1.50±0.12d — 0.43±0.02d — FP 5.47±0.23a 0.57±0.05a 1.70±0.02a 0.47±0.01a FPD 4.43±0.14b 0.42±0.00b 1.11±0.03b 0.29±0.01b OPTD 3.82±0.06c 0.66±0.04a 0.92±0.10c 0.31±0.04b