A pot experiment was carried out with different plant type maize to study the discrepancy and change rule of leave apparent free space(AFS) at different layers of canopy during the different growth stage.The results showed that AFS of canopy leaf was significantly different among varieties during the whole growth stage with the same fertilizer,and AFS decreased gradually along with the growth.Among the different plant type maize,AFS of compact conformation Shaandan 902 was the largest,and there was no diffe...
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