Of Drought Physiological And Ecological Studies

Study on Physiological and Ecological Analysis of Drought Resistance in Soybean Abstract In this paper ,study of drought resistance was made in ten soybean varieties of physiological types.five kinds of physiological indexes releated to drought resistance in seedling stage and flowering oding stage were studied in both normal and drought conditions. Analysis of variance for field experiment was also made.In addition,analysis of vertical distribution of seeds and pods,corelation between vertical distribution and drought resistance were also made.The result were as follows: the corelation coefficient between the average of subordinate function value of five physiological indexes-relative water content(RWC),relative conductivit,net photosynthesis velocity , the peroxidase(POD) and free prolin content and drought resistance coefficient was not significant(r=0.2 104) in seedling age;the weighed average of subordinate function values of five physiological indexes and drought resistance coefficient was positively significant(r=O.8745,p.z0.0l);vertical distribution of pods and seeds of drought resistance soybean varieties is that there are most of pods and seeds in middle part ,next in upper part;and the corelation coefficient between pods and seeds in the middle part and drought resistance coefficient was positivelysignificant (rO.75863,rO.8664,p