地形因子对河北省侧柏林生长的影响

Effects of Terrain Factors on the Growth of Platycladus orientalis Forest in Hebei Province

为探究适宜侧柏(Platycladus orientalis(L.) Franco)林生长的地形因子,以河北省侧柏林二类资源数据为基础,采用主成分分析和Pearson相关性分析,解析地形因子与侧柏林分测树因子的相关性。结果表明:侧柏生长因子与坡度呈极显著负相关(P<0.01),与土壤厚度呈正相关。阴坡、缓坡、厚土、低海拔是侧柏林生长的最优生境。地形因子之间存在显著相关性,其中,海拔与坡度呈极显著正相关(P<0.01),土壤厚度与海拔、坡度呈极显著负相关(P<0.01)。阳坡较阴坡坡度大、土层薄。对侧柏生长影响最大的因子是海拔,其次是坡度及土壤厚度,坡向的影响最小。

To explore the terrain factors suitable for the growth of Platycladus orientalis forests,based on the second⁃class re⁃source data of P.orientalis forests in Hebei Province,principal component analysis and Pearson correlation analysis were utilized to analyze the correlation between terrain factors and P.orientalis tree measurement factors.The results showed that the growth factors of P.orientalis were negatively correlated with slope and altitude,and positively correlated with soil thickness.Shaded slopes,gentle slopes,thick soil,and low altitude are the most optimal habitats for the growth of P.ori⁃entalis forests.There were significant correlations among terrain factors,with altitude being positively correlated with slope and soil thickness being negatively correlated with altitude and slope.Sunny slopes have steeper slopes and thinner soil than shady slopes.Altitude has the greatest impact on the growth of P.orientalis,followed by slope and soil thickness,with the smallest influence from aspect.