The canopy apparent photosynthesis property in middleripe summer maize with supperhigh yield were reported.The results showed that the dovelopmental trends of canopy apparent leaf area of the maize was fast,steady and substractive respectively at postfloral,prefloral and dough stages;LAD was higher in the stage which economic yield shaping, but total LAD was appropriate;the canopy apparent photosynthesis rate was higher and steady. The ratio of canopy respiration was lower in the canopy photosynthesis;the ...
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