施肥对毛竹胸高断面积的影响

研究了不同施肥处理下,毛竹的平均胸高断面积及胸高断面积分布的差异。结果表明:施肥可有效地增加毛竹的胸高断面积,且随着施肥年份的持续,效果更为明显;毛竹的胸高断面积与土壤的全氮含量呈负相关,与速效钾含量呈正相关,而与有效磷的相关性较弱;施肥与不施肥条件下的毛竹胸高断面积分布均符合Logistic方程,同时,持续的施肥管理还能增加大径竹在毛竹林中所占的比例。研究结果可为毛竹林高效施肥及可持续性经营提供参考。

A Study of the effect of Fertilization on Bamboo Breast-Height Basal Area

The differences in the average moso breast-height basal area and its distribution were studied under different fertilization treatments. The results showed the breast-height basal area could be significantly increased with fertilization treatments, and the longer the years for fertilizers application, the better the effect would be; The breast-height basal area was negatively correlated with total soil nitrogen, positively correlated with available potassium, and weakly correlated with available phosphorus; the distributions of the breast- height basal area were consistent with logistic equation both under fertilization condition and non-fertilization condition, and the constant fertilization could increase the proportion of large-diameter bamboo in the moso forest. This study can provide references for the efficient fertilization and sustainable management of moso forests.