Studies on the Comparison of Physiological Character Between Super High-yield Maize and Common Maize

In this experiment, two super high-yield and two common cultivars were used. The variations of physiological character were studied in different growth stages under field condition. The results showed that the chlorophyll content of super-high yield maize Xianyu335 and Zhengdan958 were near common maize. But the proportion of mesophyll cell of ear leaves was big in three-four link. In leaf blade, dissolubility protein level was higher and degradation speed was slowly, photosynthetic rate was greater and photosynthesis was powerful, peroxides activity was higher at later stage, the accumulate of malonaldehyde was fewer. This result showed the photosynthesis and the longer duration of leaf of high-yield maize Xianyu335 was higher and longer photosynthesis time from shooting had important influence on bigger biomass in milking and grain weight.