Title: Effects of Fertilization on Photosynthetic Physiological Characteristics in Maize of High Yield Variety with Different Planting Density
Abstract: The photosynthetic characteristics of the high-yield maize varieties in different density and the effect of feritlizer on photosynthetic characteristics were revealed.Based on the maize of high-yield-variety ZD958 and DD90,the effects of different fertilizations on photosynthetic physiological characteristics in leaves on ear positon of maize at late stage were studied.Results showed that photosynthetic rate(Pn),stomatal conductance(Cond) decreased whereas intercellular CO2 concentration(Ci) increased,the chlorophyll contents(SPAD value) and soluble protein contents increased firstly then decreased with growth stage.Under the treatment of NPK,the yield,Pn,Cond,SPAD value and soluble protein contents at the heading stage,filling stage and maturity stage were all the highest.DD90 of parameters of photosynthesis were higher than ZD958,but there were no significant differences on yields.Nitrogen could delay leaf senescence and increase the Pn,Potassium could significantly improve the ability to transmission CO2.Applications of nitrogen,phosphorus and postassium could improve Pn that was due to the relative improved coordination among the conductance of CO2 at air phase and liquid phase.
Publication Year: 2010
Publication Date: 2010-01-01
Language: en
Type: article
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Cited By Count: 1
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