黄山景点封闭轮休期对黄山杜鹃生长的影响

选取封闭和开放5年同海拔的黄山杜鹃样树,调查了5年标准枝和受损枝每年的新梢生长量,研究开放期间受损枝受损情况和封闭期间受损枝恢复情况。结果表明,开放期间受损枝条新梢生长量逐年降低,开放第5年受损枝条新梢生长量只有标准枝的39%,开放第4年生长率下降最多。开放期间黄山杜鹃受损枝条的新梢生长量与开放年数的关系符合指数模型。封闭期间受损枝条新梢生长量逐年上升,封闭第5年受损枝条新梢生长量达到标准枝的86%,封闭第4年生长率上升最多。封闭期间黄山杜鹃的新梢生长量与封闭年数的关系为幂函数模型。

Effects of closure on the growth of Rhododendron anhwiense in scenic area of Huangshan Mountain

Selecting the Rhododendron anhwiense trees in the 5-year opened and 5-year closed scenic areas at the same altitude in Huangshan Mountain as test objects,an investigation was conducted on the new growth of their normal and impaired branches in each year during the 5-year period,aimed to understand the damage situation of the damaged branches in opened period and the regeneration status of the branches in closed period.In the opened period,the new growth of impaired branches decreased year after year,and the growth rate in the fifth year was only 39% of that of the normal branches.The growth rate in the fourth year was the worst.There was an exponential correlation between the growth rate of the new sprouts of impaired branches and the years of opening.In the closed period,the new growth of impaired branches increased year after year,and the growth rate in the fifth year reached 86% of that of the normal branches.The growth rate in the fourth year was the best.The relationship between the length of the new sprouts of impaired branches and the years of closing accorded with power function model.