Appraisal Method and Indexes of Drought Resistance in Maize

In natural condition,this paper studied the drought resistance of 10 main maizes varieties in Hunan and Southwest of China.The results indicated that the drought had a significant influence on yield and main agronomic characters of maize.According to the analysis of drought-resistant coefficient of yield,ASI,root depth,plant height and 1000-kernal weight were selected to be used as parameters and indexes to appraise efficiently the drought resistance of maize and a method for evaluating the corn variety drought-resistance by using the five physiological parameters'average value of membership was proposed.The results indicated that the varieties with higher drought resistance is Fuyou9,Luoyu1,Lin'ao1,Keyu2,Nongdal08;the varieties with medium drought resistance is Yudan7,Lianhe3 and the varieties with lower drought resistance is Dongdan57,Keyu1,Dongdan16.The result comply with the drought resistance performance of the maizes varieties for many years.