不同降水年型下春小麦产量对降水、施氮及秸秆覆盖的响应模拟

叶晓娟, 刘强

Simulation of Spring Wheat Yield Response to Precipitation, Nitrogen Application, and Straw Mulching under Different Precipitation Year Types

Ye Xiaojuan, Liu Qiang

表3 土壤理化参数

Table 3 Soil physico-chemical parameters

土层深度 Depth of soil layer (cm) 风干含水率 Air-dried moisture (mm/mm) 容重 Bulk density (g/cm3) 饱和含水量 Saturated moisture (mm/mm) 铵态氮 Ammonium nitrogen (mg/kg) 硝态氮 Nitrate nitrogen (mg/kg) 0~5 0.013 1.290 0.463 6.300 19.100 5~10 0.013 1.226 0.487 5.200 15.200 10~30 0.046 1.325 0.450 5.100 23.100 30~50 0.071 1.200 0.497 4.900 16.600 50~80 0.087 1.140 0.520 4.600 16.800 80~110 0.103 1.140 0.520 4.800 18.200 110~140 0.107 1.250 0.480 4.800 16.400 140~170 0.115 1.120 0.529 5.800 13.700 170~200 0.127 1.110 0.531 4.100 15.400