吉林中部蒙古栎林心材与边材的生长特征

[Objective]To explore the changes in sapwood width,heartwood radius,heart,sapwood area,and tree height at breast height,and to establish a growth and development model for the heartwood and sapwood of Mongolian oak forest,in order to provide basic data for the scientific management and utilization of forests in the region.[Method]This article takes the natural Mongolian oak forest in Taoshan Forest Farm of Sanhu Nature Reserve in Jilin Province as the object,and uses a Haglof tree growth cone drill to sample 46 tree cores.The sapwood width,bark thickness,peeling radius,and heartwood radius in four directions of east,west,south,and north are measured.The regression equations of sapwood width,heartwood radius,sapwood area,heartwood area,and breast height are fitted to study the growth characteristics of Mongolian oak heartwood and sapwood.[Result]There were extremely significant differences(P<0.01)in the width,radius,area,and height of the sapwood between the north and south(P<0.01);There is a significant difference in the width and height of sapwood at breast height in Northeast China(P<0.05).The fitting of heartwood radius,heartwood area,and sapwood area with DBH growth showed a good quadratic equation relationship,with regression equations of y=1.88+0.12*x+4.98E-3x2,R2=0.926,respectively;Y=6.19E-3+-9.25E-4x+6.31E-5x2,R2=0.972;Y=-1.85E-3+7.25E-4x+7.48E-5x 2,R2=0.914.[Conclusion]Through screening and analysis of the optimal growth model,the regression model established in this study can better predict the growth process of sapwood and heartwood in the Mongolian oak forest in the study area,providing scientific reference for further research on the impact of other ecological factors in the region on the growth characteristics of sapwood and heartwood.