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作 者:陈翠丽 CHEN Cuili(Fujian Taining State-owned Forest Farm,Taining 354400,Fujian,China)
出 处:《福建林业科技》2023年第4期113-119,共7页Journal of Fujian Forestry Science and Technology
摘 要:为探究江南油杉自然生长情况和天然群落组成,揭示其种群结构特征。于2023年采用样方调查法等调查福建省泰宁县朱口镇江南油杉天然群落的物种多样性和优势种江南油杉的生长情况。结果表明,江南油杉群落共有植物种类148种,多样性丰富。其中,草本植物78种,占52.70%;灌木植物46种,占31.08%;乔木24种,占16.22%。67株江南油杉的平均胸径为(31.62±2.23)cm,除极大值(151 cm)外,整体大小较为均匀,主要集中22.3~36.4 cm之间;平均树高为(21.78±0.82)m,多极分化现象明显,差异程度较大,主要集中在16.00~27.00 m之间;平均冠幅为(8.54±0.39) m,但差异较大,其中极大值(21 m)是极小值(2 m)的10.5倍,主要集中在6.00~10.00 m之间。树高、胸径、冠幅三者间存在极显著的相关关系,胸径与树高间的相关系数为0.416,相关方程为y树高=13.91+0.26x胸径;胸径与冠幅间的相关系数为0.825,相关方程为y冠幅=2+0.21x胸径;冠幅与树高间的相关系数为0.480,相关方程为y冠幅=4.3+0.19x树高。江南油杉小苗或幼树极少,对其种群的更新造成不利影响。适时、适当地对草本层、灌木层、冠层进行梳理是人工促进其种群延续的重要途径。To explore the natural growth condition and community composition of Keteleeria cyclolepis Flous,and to reveal its population struc ture characteri stics,a study was conducted in 2023 using the method of five-point investigati o n to investigate the species diversity of the natural community and the growth condition of dominant species K.cyclolepis in Zhukou Township,T aining County,Fujian Province.The results showed that the K.cyclolepis community contained a total of 148 plant species,indicating high diversity.Among them,there were 78 herbaceous plant species,accounting for 52.70%;46 shrub species,accounting for 31.08%;and 24 tree species,accounting for 16.22%.The average diame terat breast height(DBH)of 67 K.cyclolepis individuals was(31.62±2.23)cm.Apart from the maximum value(151 cm),the overall distribution was relat ively even,predominantly concentrated between 22.3 and 36.4 cm.The average tree height was(21.78±0.82)m,exhibiting significant height differentiat ion with a wide range,mainly concentrated between 16.00 and 27.00 m.The ave rage crown width was(8.54±0.39)m,but with considerable variation.The maximum value(21 m)was 10.5 times greater than the minimum value(2 m),mainly concentrated between 6.00 and 10.00 m.There were a significant correlation between tree height,DBH and crown width.The correlation coefficient between D BH and tree height was 0.416,with a correlation equation of y(Tree height)=13.91+0.26x(DBH);the correlation coefficient bet ween DBH and crown w idth was 0.825,with a correlation equation of y(Chcanopy)=〖WT BX〗2+0.21x(DBH);and the correlation coefficient between crown width and tree height was 0.480,with a correlation equation of y(Chcanopy)=4.3+0.19x(Tree height).There were very few K.cyclolepis seedlings or saplings,which had an egative impact on population renewal.Therefore,timely and appropriate pruning of the herb layer,shrub layer,and crown layer is an important approach to promote the popula tion continuity of K.cyclolepis through artificial intervention.
分 类 号:S791.15[农业科学—林木遗传育种]
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