立地条件对寿竹生长的影响

Effect of site factors on the growth of Phyllostachys bambusoide f.shouzhu

通过对重庆市梁平县寿竹林16个样地进行抽样调查，探讨了坡度等7个立地因子对寿竹平均胸径、平均枝下高、平均秆高和平均壁厚生长的影响。结果表明：（1）坡位、海拔和物种多样性对寿竹生长影响最大；坡度、土层厚度和腐殖质厚度对其生长也有一定影响，而坡向影响不明显；（2）造林地应选择在海拔800m以下的平缓坡地，800m以上海拔、陡坡和斜坡均不适合寿竹生长；（3）坡位中的上坡不适合寿竹生长，造林地宜选择中、下坡；（4）土层不能太薄，适当加厚处理有利于寿竹生长；林地内应保持一定厚度的腐殖质层；（5）对于竹林下灌木和杂草不宜勤于拔除，以维持利于寿竹生长的生态环境；（6）寿竹对光照要求不高，在阴坡和阳坡的生长情况差异不大。

Based on the survey of 16 sample plots in the bamboo forest of Phyllostachys bambusoide f. shouzhu in Liangping county of Chongqing city, the effects of 7 site factors on diameter, the clear bold height, culm height and culm wall thickness of P. bambusoidef shouzhu were studied. The results are as follows. （1） Three site factors as the slope position, altitude, diversity of species, had significant effects on the growth of P. bambusoide f. shouzhu. The effects of the gradient, humus thickness, soil thickness were little, but that of slope aspects was not significant. （2） The forestation site should be selected at the flat ground and gentle slope below 800 m, the sites with altitude of above 800 m and the sloppiness of steep slope and slope were not suitable for the growth of P. bambusoide f. shouzhu. （3） The upper slope was not suitable for the growth of the bamboo, the mid position and foot of hills were suitable for planting the bamboo. （4） The thin soil was not suitable for the growth of the bamboo; humus thickness should be kept at a suitable level in the bamboo forest. （5） The number of plant species in the bamboo forest should be kept at a suitable level for keeping its growth environment. （6） The south and north slope aspects were all suitable for the growth of the bamboo, but the growth of the bamboo on the south slope was better.