人工抚育对天然次生林生长的影响探讨
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摘要
为了促进天然次生林生长,探究合理的人工抚育方式,以秦岭北麓油松幼龄林为试验样地,无任何抚育措施的油松林为对照组,统计了其与经过人工抚育的油松林胸径及树高等生长量,分析对比了人工抚育与对照组油松林生长量的差异,从而研究了人工抚育对天然林生长的影响。结果表明:经过人工抚育的油松林2014年、2015年平均树高增长率为9.31%,12.93%,较对照组分别高出1.16%、4.46%;平均胸径增长率为5.68%、8.67%,较对照组分别高出3.41%、5.47%;单株材积增长率为20.28%、29.73%,较对照组分别高出8.02%、15.19%,t检验结果显示经过人工抚育的油松林树高、胸径、单株材积增长率均显著高于未经抚育的对照组油松林。
Based on the present situation of China's forest resources, it is an inevitable requirement for the development of modern forestry to strengthen the cultivation of secondary forest and improve the comprehensive function of the forest. In order to promote the growth of natural secondary forest of Pinus tabulaeformis in Qinling Mountains and explore reasonable artificial tending methods, the young pure forest of P. tabulaeformis in Qinling Mountains was used as a test plot, the P. tabulaeformis forest without any tending measures was used as the control group. In this study, the differences in growth between the artificially treated and uncultivated P. tabulaeformis forests was analyzed by comparing the DBH, height and individual volume. The results showed that the average height growth rate of P.tabulaeformis after artificial tending was 9.31%,12.93%in 2014 and 2015,respectively.Compared with the control group,the average growth rate of height was increased by 1.16%,4.46%.The average growth rate of DBH was 5.68%,8.67%,which was increased by 3.41% and 5.47%,respectively.The average growth rate of the individual volume was 20.28%,29.73%,which was 8.02% and 15.19% higher than that of the control group,respectively.The t-test results showed that the growth rate of height,DBH and individual volume in the artificial tended P.tabulaeformis forest were significantly higher than that of the untreated control forest.In conclusion,reasonable artificial tending is of great significance to the growth of P.tabulaeformis forest in Qinling Mountains,which provides a basis for further exploring the tending methods of the natural secondary forest of P.tabulaeformis in Qinling Mountains and promoting the growth of stand.
Based on the present situation of China's forest resources, it is an inevitable requirement for the development of modern forestry to strengthen the cultivation of secondary forest and improve the comprehensive function of the forest. In order to promote the growth of natural secondary forest of Pinus tabulaeformis in Qinling Mountains and explore reasonable artificial tending methods, the young pure forest of P. tabulaeformis in Qinling Mountains was used as a test plot, the P. tabulaeformis forest without any tending measures was used as the control group. In this study, the differences in growth between the artificially treated and uncultivated P. tabulaeformis forests was analyzed by comparing the DBH, height and individual volume. The results showed that the average height growth rate of P.tabulaeformis after artificial tending was 9.31%,12.93%in 2014 and 2015,respectively.Compared with the control group,the average growth rate of height was increased by 1.16%,4.46%.The average growth rate of DBH was 5.68%,8.67%,which was increased by 3.41% and 5.47%,respectively.The average growth rate of the individual volume was 20.28%,29.73%,which was 8.02% and 15.19% higher than that of the control group,respectively.The t-test results showed that the growth rate of height,DBH and individual volume in the artificial tended P.tabulaeformis forest were significantly higher than that of the untreated control forest.In conclusion,reasonable artificial tending is of great significance to the growth of P.tabulaeformis forest in Qinling Mountains,which provides a basis for further exploring the tending methods of the natural secondary forest of P.tabulaeformis in Qinling Mountains and promoting the growth of stand.
引文
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