上海金山区杨树林冠下种植栓皮栎试验研究

Study on the growth performance of Quercus variabilis under canopy of Populus spp. plantation forest at Jinshan District of Shanghai City

通过在低效杨树人工林林冠下种植栓皮栎幼苗的抚育方式,对杨树林进行更新改造,并对栓皮栎的成活率、株高、地径等指标进行连续5 a的调查统计,研究其在杨树人工林下的生长表现。结果表明,栓皮栎的成活率经过1a的适应趋于稳定,通过林冠下补植栓皮栎对杨树林进行更新改造的抚育措施是完全可行的;栓皮栎栽植后从第3年起,由于受到生长空间的限制和杨树遮光的影响,生长势出现下降趋势,因此可以在第3年时对部分杨树实施抚育间伐,促进林下栓皮栎的生长。

This paper introduces a forest tending and thinning improvement method to plant Quercus variabilis seedlings under low-efficiency Populus spp. plantation forest. Five years investigation and analyzation of the survival rate, plant height and ground diameter has been done to evaluate the Q. variabilis growth performance under canopy of P. spp. plantation. The results show that this kind of tending and thinning improvement method is effective. The survival rate of Q. variabilis is stable after one year＇s adaptation,while start from the third year, the growth performance of Q. variabilis showed declined tendency due to the limitation of growth space and shading effect, so tending and intermittent cutting of Populus could promote Q.variabilis growth by the third year.