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Afforestation Effect and Stand Structure of 36-Year-Old Liriodendron chinense and Sassafras tzumu Mixed Forest
XIANG Ming, LIU Congquan, PENG Mengyou, YAO Maohua, XIANG Zuheng, MA Fengfeng, HE Yong, ZHANG Peng, LIU Dongmei
Journal of Jishou University(Natural Sciences Edition)
2024, 45 (5):
68-76.
DOI: 10.13438/j.cnki.jdzk.2024.05.009
The 36-year old mixed forest of Liriodendron chinense and Sassafras tzumu in the middle altitude mountain area of Longshan County was studied from the aspects of the mixing effect of the mixed forest,the influence of spinning tillering on the growth of Liriodendron chinense and the stand structure.The results showed that Liriodendron chinense and Sassafras tzumu were not suitable for the construction of mixed forest.The 36-year old mixed forest had medium stand growth,and the existing density was 756±80 trees/hm,which could be used for medium and large-diameter wood cultivation.Tillering has a significant effect on the diameter,crown width and stock of Liriodendron chinense.The diameter distribution of Liriodendron chinense showed a left-leaning approximate normal distribution,and the model applicability χ test only followed the normal distribution,but not the Weibull distribution.The height distribution of Liriodendron chinense showed a right-leaning approximate normal distribution,and its model applicability did not pass the χ test and did not conform to the normal distribution or Weibull distribution.The cubic equation is the best fitting curve equation for the height and diameter of liriodendron tree.
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