Adaptability Analysis Of The Growth Equation Of Red Bean

Mindong area red bean tree(Ormosia hosiei Hemsl.Et Wils)trunk analytical materials,in the shu ma cher equation,yoshida is male equation,house field equations,Korf equation,leiva wake equation,revised weibull equation,logistic equation,single molecular equation,candy send equation,Richard equation were analyzed,on the basis of selecting the optimal growth equation.Through the optimal equation of? class on the high plane of dignity and ? with diameter at breast height,tree height and volume as the factor analysis of the growth rule.According to the results of the previous study,the economic maturity of individual red bean trees was studied.Results showed that the ?earth-like maximum diameter at breast height,tree height,volume of related index were 0.91,0.881,0.777,a maximum correlation coefficient is 0.953939,0.938616,0.881476,respectively,all corresponding equation for Richard equation;? earth-like maximum diameter at breast height,tree height,volume of related index were 0.943,0.968,0.92,maximum correlation coefficient of 0.971082,0.98387,0.959166 respectively corresponding equations for Richard equation.Due to the wide use range,high accuracy and strong adaptability of the Richard equation,and the parameters in the equation have certain biological significance,the Richard equation(Richards,1959)equation y=A(1-e-rt)c(A,r,c?0)is selected as the optimal growth equation of the red bean tree in this paper.After the optimal equation of ? classes and ? ground diameter at breast height,tree height and volume three factor comparative analysis of growth regularity,results ? terrestrial red bean tree of the average diameter at breast height growth and 45 a,year after year growth intersect when 45 a,the average growth peak.? terrestrial red bean tree diameter at breast height average increment and years of growth intersecting 20.A,also is in the average annual growth rate reached the maximum."Accordingly,?terrestrial red bean tree average DBH growth reaches the maximum value of the time and ? earth-like no difference is too big.And ? class average increment of tree height and years of red bean tree increment in the intersection,20 a,average gro"wth peak when 20 a.?terrestrial red bean tree average increment of tree height and years of growth meet in 5 a,also is in the average annual growth rate reached the maximum.? terrestrial volume average red bean tree increment again several years of growth and intersect at 20 a,when 20 a,an average growth rate is maximum,? terrestrial red bean tree volume 5 a maximum average growth.Therefore,in the operation process,the thinning method can be adopted between 10 and 20 a to provide sufficient nutrient space for the trees,thus promoting the growth of the trees in diameter.In artificial operation,reasonable operation measures can be drawn up according to the growth characteristics to provide scientific basis for the reasonable operation and the determination of the main division age of red bean trees,and the rotation period can also be determined by taking economic and technological maturity into consideration and the cultivation target into consideration.At the same time,the economic maturity of red bean tree plantation is discussed,which can improve the management level and economic efficiency of red bean tree plantation and provide a new basis for the sustainable development of forestry.