Effect of Different Nitrogen Treatments on Rice Leaf Traits of Different Panicle Type Cultivars

The leaf traits of different panicle types Japonica rice varieties under two nitrogen levels(zero and high) was studied by using erect panicle type cultivars Laiojing 5 and curved panicle type cultivar Toyonishiki as materials.The results showed that,with the increase of rate of nitrogen fertilization leaf area of different varieties increased;and photosynthetic area of plant increased while stomatal density obviously reduced;and net photosynthetic rate and chlorophyll content increased remarkably.Transpiration rate and gas diffusion conductivity of different panicle type cultivars decreased obviously with the increasing of the application amount of nitrogen,and the effect of the application amount of nitrogen on transpiration rate and gas diffusion conductivity of curved panicle type variety was far higher than that of erect panicle type cultivar.There were significant difference in specific leaf weight of different cultivars and specific leaf weight was mainly decided by cultivars.