Abstract: With the method of groove,this paper study the effect of different rhizosphere ventilation treatment on potato′s leaves chlorophyll content,net Photosynthetic(Pn),Stomatal conductance(Gs),Intercellular CO2 concentration(Ci),chlorophyll fluorescence Parameters and soluble protein,soluble sugar with the whole substrate culture as antitheses(CK:3 200-4 500 μL/L CO2;20.1%-20.3% O2),the treatment are rhizosphere natural diffusion ventilation(T1:2 000-3 000 μL/L CO2;20.35%-20.5% O2),rhizosphere tuberventilation(T2:800-1 500 μL/L CO2;20.5%-20.75% O2)and rhizosphere double end ventilation(T3:380-820 μL/L CO2;20.8%-20.9% O2),result proves that the improving rhizosphere ventilation can promote photosynthesis and the metabolites and accumulation of photosynthate.T2 achieves the best result to the potato,and T1 is the secondary.

Key words: Rhizosphere, Potato, Photosynthetic characteristics, ChlorophyII fluores parameters

CLC Number: 

• S532.01