The Influence of Stand Structure on Understory Herbaceous Plants Species Diversity of Platycladus orientalis Plantations in Beijing, China

Species diversity is a crucial index used to evaluate the stability and complexity of forest ecosystems. Studying relationship between stand structure understory herbaceous plants species useful for managers formulate best optimization method with goal improving diversity. In this research, Platycladus orientalis plantations in Beijing were taken as research object. Pearson’s correlation analysis was explore single-factor diversity; furthermore, typical multiple linear regression multi-factor analyze dominant parameters affecting range structures studied, results showed that canopy density negatively correlated Shannon–Wiener Simpson (p < 0.01), tree 0.05). terms spatial structure, mingling degree positively index, Margalef richness Pielou evenness 0.05), while uniform angle The coefficient first group variables 0.90 0.05); from variables, it can be concluded most influential indicator comprehensive diversity, load −0.690, are responsive indicators changes loads 0.871 0.801, respectively. process management under low altitude, south slope, thin soil layer hard parent material, order improve overstory should appropriately reduced. Additionally, necessary regulate horizontal stands. When trees randomly distributed high, herbs increased.