Abstract: In order to clear changes in morphological characteristics of maize after different time submergence stress treatment in seedling stage,In this paper,we based on spring corn Zhouyu 2 number water-logging simulation test in 2014,observed plant height,leaf number before and after water-logging test,plant height,length of male flowers,male branch number of tasseling stage and milky stage coarse stems and other morphological data.Used the mathematical statistics method to analysis the features of plant type,pattern and other morphological in different seedling stage(three-leaf stage,seven-leaf stage)and subjected different duration time water-logging disasters.The results showed that:Before and after water-logging treatment,about height variation rate,there were significant differences between different stages and control.Water-logging lasted 5.2 days in three-leaf stage,4.4 days in seven-leaf stage,plant height began to negative growth.Water-logging continued 7.5 days or more in three-leaf stage,5.0 days or more in seven-leaf stage was not too good for late recovery growth of corn.Two water-logging processing stage,leaf blade rate had a quadratic curve relationship with water-logging duration.Water-logging duration above 2.1 days in three-leaf stage,more than 1.1 days in seven-leaf stage,leaf growth rate began to decrease or negative growth.Water-logging continued 14 days in three-leaf stage,13 days in seven-leaf stage,green leaves was zero.Seedling water-logging duration had significantly positively correlation with stem thickness of milking stage.Two phases were water-logging lasted 10 days,stem crude lower than 10 cm.Same water-logging duration time,about corn male length and branch number after water-logging disaster,Three-leaf stage had significantly difference with seven-leaf stage.Male flowers length and branch number had quadratic curve relation with water-logging duration time.Water-logging duration time lasted 14 days in three-leaf stag,male flowers would have no branch number,lasted 9.3 days in seven-leaf stage,branching number was least.Conclusions of this study could provide a scientific basis for the development of spring corn water-logging evaluation of the South as well as spring maize varieties breeding of disaster.

Key words: Corn, Seedling water-logging, Number of green leaves, Male flowers length, Branch number

CLC Number: 

• S513.03