亚热带阔叶林下种植三叶青、重楼和白及对土壤特性的影响OA

Exploring the impact of forest-medicine compound management on soil properties is currently a hot topic of concern in forest-medicine compound management.This study took the close-nature cultivation forest lands of understory cultivation of Tetrastigma hemsleyanum,Paris polyphylla,and Bletilla striata for 3.5 years as the objects,and used for-est lands without planting medicine as a control,analyzed the effects of forest-medicine compound management on 17 pa-rameters of soil physicochemical properties,microbial biomass,and extracellular enzyme activities.The results showed that:compared with the control,understory cultivation of B.striata increased soil pH(P<0.05).However,no signifi-cant changes were observed in soil electrical conductivity,bulk density,or porosity of understory cultivation.Soil or-ganic carbon content in the B.striata and T.hemsleyanum groups were 26.48 g/kg and 23.83 g/kg,respectively,both significantly lower than the control 31.73 g/kg(P<0.05).Total nitrogen content in the P.polyphylla and T.hemsleya-num groups were 1.55 g/kg and 1.41 g/kg,respectively,significantly higher than the control 0.94 g/kg(P<0.05).No significant differences were observed in total phosphorus,cation exchange capacity,ammonium,nitrate,or other indica-tors.T.hemsleyanum,B.striata,and P.polyphylla significantly reduced soil microbial biomass carbon(P<0.05).P.polyphylla increased microbial biomass phosphorus and soil phosphatase activity(P<0.05).Z-score analysis indi-cated that T.hemsleyanum,P.polyphylla,and B.striata lowered the comprehensive score,among them,the compre-hensive score of P.polyphylla was higher than T.hemsleyanum and B.striata,but the statistical differences were not significant.This study provides basis data support for the evaluation of the ecological impact and economic effects of un-derstory medicine cultivation in subtropical forests.