Impact of site factors on forest regeneration in Mount Tianmu mixed coniferous and broad-leaved forests
[Objective]The objective is to study the impact of site factors on forest regeneration in the mixed coniferous and broad-leaved forests in Mount Tianmu,and provide a theoretical basis for the management of subtropical mixed coniferous and broad-leaved forests.[Method]A mixed coniferous and broad-leaved forest in Mount Tianmu was taken as the research object.Spearman's correlation analysis was conducted between forest regeneration factors,soil factors and terrain factors.One-way ANOVA was used to analyze the differences in forest regeneration among different soil and terrain factors.A linear regression model was constructed to quantitatively describe the relationship between forest regeneration and terrain and soil factors.[Result](1)There were 79 species of mixed coniferous and broad-leaved forests in Mount Tianmu,among which the dominant species were Camellia fraterna,Cyclobalanopsis glauca,Lithocarpus brevicaudatus,Cyclobalanopsis myrsinifolia,Machilus pingii,Rhododendron ovatum,Torreya grandis,Lindera glauca,Eurya japonica,and Litsea coreana.(2)There was a highly significant negative correlation between available potassium and the total number of updated tree species(P＜0.01),a highly significant positive correlation between altitude and the total number of updated tree species(P＜0.01),a significant negative correlation between organic matter and the number of updated tree species(P＜0.05),and a highly significant positive correlation between available potassium and the total number of updated tree species(P＜0.01).(3)There was a significant difference in the total number of updated tree species with different slope orientations and available potassium levels(P＜0.05).There were significant differences in the number of updated tree species with different grades of slope and soil organic matter(P＜0.05).(4)In the linear regression model with the total number of upgraded tree species as the dependent variable,the regression coefficients of available potassium and altitude were significant(P＜0.05).[Conclusion]In the mixed coniferous and broad-leaved forests in Mount Tianmu,altitude,slope,aspect,soil organic matter and available potassium have significant effects on forest regeneration.[Ch,3 fig.5 tab.49 ref.]
万方数据
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