摘要
Abstract
To explore the natural growth condition and community composition of Keteleeria cyclolepis Flous,and to reveal its popula-tion structure characteristics,a study was conducted in 2023 using the method of five-point investigation to investigate the species di-versity of the natural community and the growth condition of dominant species K.cyclolepis in Zhukou Township,Taining County,Fu-jian Province.The results showed that the K.cyclolepis community contained a total of 148 plant species,indicating high diversi-ty.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 diameter at 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 relatively even,predominantly concentrated between 22.3 and 36.4 cm.The average tree height was(21.78±0.82)m,exhibiting significant height differentiation with a wide range,mainly concentrated between 16.00 and 27.00 m.The average crown width was(8.54±0.39)m,but with considerable varia-tion.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 DBH and tree height was 0.416,with a correlation equation of y(Tree height)=13.91+0.26x(DBH);the correlation coefficient between DBH and crown width was 0.825,with a correlation equation of y(Chcanopy)=2+0.21x(DBH);and the correlation coefficient be-tween crown width and tree height was 0.480,with a correlation equation of y(Cheanopy)=4.3+0.19x(Tree height).There were very few K.cyclolepis seedlings or saplings,which had a negative 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 population continuity of K.cyclolepis through artificial intervention.关键词
江南油杉/自然群落/群落结构Key words
Keteleeria cyclolepis Flous/natural community/community structure分类
农业科技
