Effect of Fertilizer Treatments on the Photosynthesis of Cucumber Plug Seedlings
WANG Bao-shun (Zhejiang University,Hangzhou 310029 )
When cucumber seedlings were raised in plug tray with mixed media (peat moss and perlite), increasing nitrogen and potassium to 200ug/L and phosphorus to 100ug/L could heighten net photosynthetic rate in a whole day, enhance light saturation and apparent quantum yield, decrease both light and CO_2 compensation points. However, with nitrogen and potassium heightening to 400ug/L and phosphorus to 1000ug/L, the change of the mentioned photosynthetic index showed the opposite trend. Light saturation points began to decrease as long as phosphorus in media moved up to 500ug/L.Therefore, considering the effect of fertilizer treatments on photosynthesis, the optimum combination of N?P_2O_5?K_2O in growing media was N:200 mg/L,P_2O_5:100 mg/L,K_2O:200 mg/L?
【CateGory Index】： S642.2