青杨速生丰产最适造林密度的研究

Study on Optimum Afforestation Density of Fast-Growing and High-Yield Poplar

青杨在大范围、大规模构建高原生态屏障和改善生态环境中,始终发挥着无可替代的主导作用,但很多地区无论是大面积造林还是小片林、四旁植树都存在着密度过大、生长不良的问题。通过设置不同密度的标准地对不同密度林分的平均冠幅、平均胸径、平均树高、单株材积、标准地材积测量计算,求出了最适宜造林密度为4 m×4 m,为今后青杨造林提供了理论依据,建议今后青杨造林均采用此密度。

Poplar has always played an irreplaceable leading role in the large-scale construction of plateau ecological barrier and the improvement of ecological environment.However,there are problems of excessive density and poor growth in many areas,whether large-scale afforestation or small-scale forests and trees planted around.In this paper,by setting standard plots with different densities,and measuring and calculating the average crown width,average DBH,average tree height,single tree volume and standard plot volume of forests with different densities,the most suitable afforestation density is 4m×4m,which provides a theoretical basis for poplar afforestation in the future.It is suggested that this density should be adopted for poplar afforestation in the future.