9年生邓恩桉河岸人工林林木高度自然分化特征研究

Analysis on Community Height Structure of Artificial Forest on Eucalyptus dunnii River Bank in Introduction District

以建阳市引种的9年生邓恩桉河岸人工林为研究对象，采用高度级作为参考指标，引入优势种群个体数、优势种群及群落失稳率、群落垂直空间分享度、仅多样性等指标分析邓恩桉人工林的高度结构特征。结果表明：邓恩桉人工林中优势种个体在第18～20 m高度级达到峰值；群落整体失稳率为负值；第3～5 m、9-11 m高度级物种组成和分享度最大；or多样性指标在第3～5 m高度级最大。

9-year-old planted forest Eucalyptus dunnii which was introduced as riparian forest in Jianyang citywas used as research object, and height -classes as reference index, dominant populations＇ individual number, thecommunity instability rate, the sharing degree of community vertical space, a diversity and other indicators were in-troduced to analyze the height structure of planted forest Eucalyptus dunnii. The results indicated that dominant in-dividual of Eucalyptus dunnii community had reached the peak in the 18th - 20th m height-class, but the communityinstability rate of overall community was negative. Meanwhile, the maximum species composition and sharing de-gree were in 3th -5th and 9th - 11th m height-class, a diversity indicator had reached the maximum in 3th --5th mheight - class. These research results had provided a foundation for further study on the community height structureand a theoretical basis for foster better management of Eucalyptus dunnii.