间伐强度对不同林分类型美景度的影响

Effects of Thinning Intensity on Scenic Beauty Values of Different Types of Stands

以南京无想寺国家森林公园5个典型林分为对象,分析了不同间伐强度间美景度的差异,建立了美景度与景观要素的关系模型。结果表明:间伐尤其是强度间伐能大幅提高各林分美景度;林分密度、胸径、郁闭度等是影响该地区林内景观质量的主要因子;较好的通透性、较大的平均胸径及树高有利于提高林分美景度,而林分密度和郁闭度增大会给景观美学质量带来负面影响,进行生态风景林构建时应注意协调抚育措施对各林分因子的影响。

The difference in scenic beauty value of five typical stands in Wuxiangsi National Forest Park of Nanjing City under different thinning intensities was analysed,and then a multivariate linear model of scenic beauty value and landscape element was established. Result indicates that the scenic beauty value can be greatly improved by thinning,especially by high-intensity thinning. Stand density,diameter at breast height,and canopy closure are main factors influencing landscape quality of different stands in the study area. Better optical porosity,larger diameter at breast height and tree height are helpful to improve the scenic beauty value of the stands,while higher stand density and canopy density will be harmful to scenic beauty. Therefore,positive and negative influences of tending measures on stand factors should be taken into account during the construction of scenic forests.