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9 不同种植方式下的大豆土壤NO3--N累积量(雅安池栽) MSNN: 单作大豆不施氮; MSRN: 单作大豆减量施氮; ISNN: 套作大豆不施氮; ISRN: 套作大豆减量施氮。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. 9 Soil NO3--N accumulation amount of soybean strips under different planting patterns (plot trial in Ya’an) MSNN: monoculture soybean with no N; MSRN: monoculture soybean with reduced N; ISNN: intercropped soybean with no N; ISRN: monoculture soybean 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).