Correlation Analysis between Growth Traits and Biomass Distribution of Albizia odoratissima
To understand the interaction between the growth and biomass of Albizia odoratissima seedlings,using the one-year-old seedlings of A.odoratissima as the object of study,four growth traits,including seedling height,ground diameter,prime root length,lateral root number,and the biomass of each component,were measured and calculated.Correlation and regression analysis were employed to eliminate traits that had little impact on biomass.Based on this,a regression model was constructed.The results showed that the variation in the growth traits of the A.odoratissima seedlings was moderate and could be a good research object for variation.At the same time,the root-to-shoot ratio had a high coefficient of variation(close to or exceeding 20%),indicating significant differences between individuals and the advantage of selecting individuals with excel-lent growth performance.The correlations between the prime root length and various biomasses were the smallest.However,the correlations between seedling height,ground diameter,lateral root number,and different biomasses were strong,reaching extremely significant correlations.Regression analysis was conducted on significantly correlated biomass and corresponding morphological indicators,and their goodness of fit was good.The indicators with good goodness of fit were seedling height(R2=0.706)and ground diameter(R2=0.580).After screening,two optimal regression models were obtained,namely,the J-shaped growth curve model for aboveground biomass and seedling height(ln EAB=0.075H-0.310)and the univariate linear regression model(EB=1.472H-1.769)for total biomass and ground diameter.These two models have high accuracy and meet practical application requirements,indicating that the biomass of A.odoratissima plants can be estimated through regression with highly correlated growth trait indicators.
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