人为干扰对黄山高海拔木本植被生长的影响

对黄山高海拔景区黄山松、黄山杜鹃等8种代表性木本植被,以正向、逆向人为干扰情况下的相对生长量作为统计指标,建立和遴选了8个树种回归模型,模拟预测各树种在正向、逆向人为干扰时的受损过程和恢复过程。结果表明,四照花、三桠乌药、灯笼树3种树种耐逆向人为干扰能力较强,第5年时仍能保持至原生生长状态的51.71%～63.78%,正向人为干扰下恢复进程快,可恢复至原生生长状态的92.96%～100%。白檀、水榆花楸、六道木3种树种耐逆向人为干扰能力中等(42.92%～49.71%),但恢复能力却很强(96.56%～99.67%);黄山松、黄山杜鹃耐逆向人为干扰能力弱(38.89%～43.05%),恢复也很缓慢。

Influence of Human Interference on the Growth of Woody Plants in High Altitude Scenic Area of Huangshan Mountain

Eight tree species such as Pinus thunbergii and Rhododendron anwheiense at high altitudes in Huangshan Mountain were selected as experimental objects.Eight regression models were established to simulate and predict the damaged process and restoration process of all the tree species under different interference situations using relative growth increment under positive and negative human interferences as parameters.Results indicate that,Dendrobenthamia japonica var.chinensis,Lauraceae obtusiloba and Koelreuteria paniculata have strong abilities to resist negative human interference,and they could maintain a growth rate of 51.71%-63.78% of their original growth status in their 5th year.These three species also have the ability to exhibit good restoration process under positive interference,and 92.96%-100% of their growth increment could be restored compared with their original growth status.Symplocos paniculata,Sorbus alnifolia and Abelia parvifolia show moderate abilities to resist negative interference(42.92%-49.71%),but their restoration abilities are very outstanding(96.56%-99.67%).P.taiwanensis and R.anwheiense show very poor performances and also restore slowly under negative interference.