典型黑土春玉米化学肥料养分利用效率变化研究
Nutrients Use Efficiency Change of Chemical Fertilizers for Spring Maize in a Typical Black Soil
图2. 2013—2016年间NPK处理氮磷钾产量反应和养分吸收反应
不同字母表示年际间差异达5%显著水平。
Fig. 2. Nitrogen, phosphor and potassium yield response and nutrient uptake response in NPK treatment from 2013 to 2016
Different letters denote significant difference among years at the 5% level. The same as
