| The experiment was conducted to determine the correlation between root vigor and main agronomic characters of flax.The results indicated that the deoxidization intensity of roots was the highest during seedling to budding stage of flax,and then it reduced gradually;the deoxidization intensity in the upper part of roots reduced fast,in the middle part was following,and in the lower part was rather stable.During the seedling to budding stage,the deoxidization intensity of the upper part and middle part of roots were higher than that of the lower part by 37.78%~84.6% and 20.40%~45.39%,respectively;however,during capsule forming stage,the deoxidization intensity of the three parts of roots were almost the same.The deoxidization intensity was positively correlated to the number of capsules per plant,seed weight per plant and number of flowers per plant,and negatively correlated to the seeding ratio.The increase of dry weight of roots accorded with logistic growth-equation.The dry weight of roots was significantly positively correlated to the average increase rate,the increase rate at gradual increasing stage and the increase rate at fast increasing stage,but not significantly correlated to the length of growth period;it was significantly positively correlated to the number of capsules per plant,seeds weight per plant and number of flowers per plant,and negatively correlated to the seeding ratio. |