减量施氮对玉米-大豆套作系统土壤氮素氨化、硝化及固氮作用的影响

雍太文,陈平,刘小明,周丽,宋春,王小春,杨峰,刘卫国,杨文钰

Effects of Reduced Nitrogen on Soil Ammonification, Nitrification, and Nitrogen Fixation in Maize-soybean Relay Intercropping Systems

Tai-Wen YONG,Ping CHEN,Xiao-Ming LIU,Li ZHOU,Chun SONG,Xiao-Chun WANG,Feng YANG,Wei-Guo LIU,Wen-Yu YANG

图8 不同种植方式下的玉米土壤NO3--N累积量(雅安池栽) MMNN: 单作玉米不施氮; MMRN: 单作玉米减量施氮; IMNN: 套作玉米不施氮; IMRN: 套作玉米减量施氮。同一取样区间下, 相同种植模式不同氮水平间字母不同表明差异显著(LSD, P < 0.05)。

Fig. 8 NO3--N accumulation amount of maize under different planting patterns (plot trial in Ya’an) MMNN: monoculture maize with no N; MMRN: monoculture maize with reduced N; IMNN: intercropped maize with no N; IMRN: monoculture maize with reduced N. At the same sampling interval, bars represented by different letter are significantly different between N levels under the same planting pattern (LSD, P < 0.05).