Effects of Different Mixed Forest Types on Phase of Soil Phosphorus Fraction in Chengdu Longquan Mountain
[Objective]This study aims to investigate the effects of various mixed forest types on soil phos-phorus components and to provide insights for the sustainable management of Cupressus funebris planta-tions.[Method]In this study,three newly established mixed forests,namely,mixed forests of Cinna-momum camphora and Triadica sebifera,mixed forests of C.camphora and Koelreuteria paniculata,mixed forests of T.sebifera,C.funebris and Sophora japonica,along with pure forests of C.funebris,were selected as objects in Chengdu Longquan Mountain.We measured soil phosphorus fractions,including to-tal phosphorus,microbial biomass phosphorus,available phosphorus,as well as soil physicochemical properties,and analyzed their relationships to explore the impact of forest types on soil phosphorus frac-tions and potential influencing factors.[Result]① Three types of mixed forests significantly increased the contents of soil microbial biomass phosphorus,available phosphorus,and total phosphorus.The con-tents of soil total phosphorus and microbial biomass phosphorus were higher in the mixed forest of C.cam-phora and T.sebifera compared to other forest types.However,the contents of soil available phosphorus and microbial biomass phosphorus were higher in mixed forest of K.paniculata and C.camphora than in other forest types.② Mixed forests increased the contents of soil organic carbon(SOC)and soil total ni-trogen,as well as total soil porosity,while decreasing soil bulk density and soil pH.③ Redundancy analysis revealed that soil pH and SOC were the primary factors influencing the soil phosphorus compo-nents,accounting for 49.8%and 27.6%of the variations in soil phosphorus components,respectively.[Conclusion]In the initial stage of establishing mixed forests of C.funebris,soil total phosphorus,mi-crobial biomass phosphorus,and available phosphorus contents typically increase with SOC content and soil pH.
mixed forestspure forest of Cupressus funebrissoil phosphorus fractionsredundancy analysis
NETL
NSTL
万方数据
维普
