典型黑土春玉米化学肥料养分利用效率变化研究

仇少君,李宁,何萍,魏丹,金梁,赵士诚,徐新朋,周卫

Nutrients Use Efficiency Change of Chemical Fertilizers for Spring Maize in a Typical Black Soil

Ning LI,Ping HE,Wei ZHOU,Dan WEI,Liang JIN,ShiCheng ZHAO,XinPeng XU,ShaoJun QIU

表3 2014—2016年不同处理播前和收获后0—90 cm土壤剖面NO3--N、NH4+-N和Nmin储量（kgN·hm-2）

Table 3 NO3--N, NH4+-N and Nmin content above 90 cm soil depth at pre-sown and post-harvested under different treatments from 2014 to 2016

处理 Treatment 2014 2015 2016 播前Pre-sown 收获Post-harvested 播前Pre-sown 收获Post-harvested 播前Pre-sown 收获Post-harvested NO3--N NH4+-N Nmin NO3--N NH4+-N Nmin NO3--N NH4+-N Nmin NO3--N NH4+-N Nmin NO3--N NH4-N Nmin NO3--N NH4+-N Nmin CK 120.4a 41.7b 162.2a 61.7a 5.0a 66.6a 41.3c 108.9b 150.2c 53.5b 31.6a 85.1bc 36.3a 3.7a 40.0a 18.3a 14.1a 32.5a PK 114.7a 68.6ab 183.3a 73.2a 7.1a 80.3a 62.2c 102.6b 164.8bc 57.0b 3.3a 60.3c 43.7a 7.7a 51.4a 21.0a 6.3b 27.3a NK 94.1a 87.8a 181.8a 65.2a 10.1a 75.3a 99.2ab 108.9b 208.2ab 107.4a 10.6a 118.0a 68.9a 4.9a 73.8a 43.3a 4.5b 47.8a NP 121.5a 75.9ab 197.4a 72.5a 8.2a 80.8a 71.3bc 111.1ab 182.4bc 117.7a 8.2a 125.9a 60.7ab 5.5a 66.2a 33.9a 4.6b 38.5a NPK 159.0a 100.4a 259.5a 77.0a 9.9a 86.9a 114.6a 130.8a 245.4a 68.7b 5.3a 74.0c 66.3a 4.9a 71.2a 36.6a 6.2b 42.9a