Evaluation on Soil Anti-erosion of Four Forest Types in Laoshan National Forest Park in Nanjing

Sample plots were established in Eucommia uloides, Quercus acutissima, Phyllostachys heterocycla ‘Pubescens’ and Pinus thunbergii stands of Laoshan National Forest Park in Nanjing, Jiangsu province in 2015. Determinations were carried out on 15 soil indicators at different layers of the stands. Soil anti-erosion of different types of forest was evaluated by 15 measured indicators, such as bulk density, organic matter content, aggregate properties, etc. The results demonstrated that Q. acutissima forest had better performance than the other three forests. Principal component analysis on 15 indicators indicated that organic matter content, internal friction angle, fines content and sand content could be selected for evaluation indicators for soil anti-erosion. Comprehensive evaluation on soil anti-erosion of sampled stands by selected indicators and method of weighted mean resulted that the surface soil anti-erosion at Q. acutissima forest was the best, followed by E. uloides, P. thunbergii and Ph. heterocycla ‘Pubescens’.