泰山油松空间分布特征及生长状态分析

Analysis of spatial distribution characteristics and growth state of Pinus tabulaeformis in Mountain Tai

为探究泰山油松的空间分布特征及生长状态的变化规律,分析环境变量对泰山油松生长状态的影响,基于数字高程模型(DEM)和森林资源清查“一张图”数据,建立油松(Pinus tabulaeformis)空间分布的地形信息图谱,提取研究区2000—2018年油松生长季的最大NDVI表征油松的生长状态并分析其在不同立地条件下的变化规律。结果表明:(1)油松纯林主要分布在海拔850~1500 m的北坡、东北坡和西北坡(面积占比为40%~90%),油松混交林主要分布在海拔400~1050 m、1300~1450 m的山坡、山谷、山脊和东北坡、东坡、西南坡(面积占比为20%~30%);(2)2000—2018年,油松整体的生长状态呈向好的趋势,NDVI显著增大(9.82%)和极显著增大(13.56%)区域的面积占比明显大于显著减小(4.48%)和极显著减小(2.69%)区域的面积占比;(3)油松林在海拔600~1400 m、坡度<5°和25°~55°、土层厚度>35 cm的区域和北坡、西坡、西北坡的生长状态较好。通过对泰山油松林的空间分布特征及其在不同立地条件下生长状态的分析,总结了利于油松生长的立地条件,为泰山油松林健康养护和古树名木保护提供了科学依据。

This work was to discuss the spatial distribution characteristics and growth state of Pinus tabu-laeformis in Mountain Tai,and to analyze the influence of environmental variables on its growth state.Based on the digital elevation model(DEM)and“one map”of forest resources survey data,the geo-in-formatic graphics of the spatial distribution of Pinus tabulaeformis was established.Then the maximum NDVI of the growing season of Pinus tabulaeformis in the study area from 2000 to 2018 was extracted to characterize the growth state of Pinus tabulaeformis,and analyze its changes under different site condi-tions.The findings indicate that(1)Pinus tabulaeformis pure forest is mainly distributed in the areas of north,northeast and northwest slopes at an altitude of 850~1500 m(40%~90%of the area),while the mixed forestofPinustabulaeformisis mainly distributed in the areas of hillside valleys,ridges,north-east,east and southwest slopes at altitudes of 400~1050 m and 1300~1450 m(20%~30%of the area).(2)From 2000 to 2018,the growth state of Pinus tabulaeformis forest showed a positive trend,and the area share with significant NDVI increase(9.82%)and extremely significant increase(13.56%)was larger than those with significant NDVI decrease(4.48%)and extremely significant de-crease(2.69%).(3)The growth state of Pinus tabulaeformis forest is better in the area of elevation 600~1400 m,slope<5°and 25°~55°,soil thickness>35 cm,and in the north,west and northwest slopes.Based on the analysis of the spatial distribution characteristics of Pinus tabulaeformis forest and the change of its growth state under different site conditions,this study summarized the site conditions conducive to the growth of Pinus tabulaeformis,and provided scientific basis for the health conservation of Pinus tabulaeformis forest and the protection of old and famous trees.