干旱胁迫下钾对玉米幼苗生长的影响及其机理

his study selected Zhengdan 958 and Jun 20 single two maize varieties, in seedling stage by 15% PEG-6000 simulated drought stress, setting different potassium concentrations, the determination of different corn growth index and endogenous hormones and anti oxidase activity changes and analysis of drought stress of potassium on the growth of maize seedling effect and the relationship between hormone and anti oxidase. The results showed that potassium had no significant effect on the growth of Maize under normal conditions, but potassium was significantly increased by drought stress and increased the drought resistance of maize.. Analysis of endogenous hormone and anti oxidase showed that drought stress of maize Endogenous IAA, GA and Zr contents were significantly lower than those of normal water treatment, and the ABA content was significantly higher than that of normal water treatment,High potassium treatment of IAA, Zr and ABA content is higher than the low potassium content; drought stress under mod content was higher than the normal level and SOD with processing time growth was increased first and then decreased; high potassium treatment mod content lower than low potassium treatment mod content, high potassium content of SOD is high in low potassium treatment of SOD content. .