树木任意部位直径干形预测研究

Prediction of the Diameter and Shape of Random Parts of Trees Trunk

试验地点选在延吉市林业局的帽儿山林场、龙井市林业局的智新林场、勇新林场和延边大学农学院后马蹄山,共选伐样木28株,实测每株样木0.1、0.2、0.3、0.4、0.5、0.6、0.7、0.8、0.9 h的相对高处直径。计算各株样木的相对直径,并进行了对比分析,结果为天然林赤松和人工林赤松的相对直径不因起源的不同而不同;进而对同一林分内不同赤松样木的干形进行了分析,结果为其相对干形基本一致。通过回归得到预测赤松单木任意部位直径经验方程为D n:=0.1315 D 1.3+1.2763n D 1.3+1.9645n-0.0265。在树干干形的测算理论中,干形一直是人们研究的热点问题。有关赤松相对干形的研究尚未见报道,为林业生产实践与科学的研究提供理论依据。

In this paper,we selected 28 samples in Maoer Forest Farm of Yanji Forestry Bureau,Zhixin Forest Farm of Longjing Forestry Bureau,Yongxin Forest Farm and Mahoe Mountain,in Yanbian University.The relative diameters of each sample tree were measured at 0.1,0.2,0.3,0.4,0.5,0.6,0.7,0.8 and 0.9 h.The relative diameters of each sample tree were calculated and compared.The results showed that the relative diameters of pine in natural forest and pine in artificial forest were not different due to different origins.Then the trunk shapes of different pine trees in the same stand were analyzed,and the results showed that the relative stem shapes were basically the same.By regression,the empirical equation for predicting the diameter of any part of single pine tree is:D n:=0.1315 D 1.3+1.2763n D 1.3+1.9645n-0.0265.In the theory of calculating trunk shape,trunk shape has always been a hot topic.The study on the relative trunk shape of red pine has not been reported.This study provides a theoretical basis for forestry production practice and scientific research.