Soil multifunctionality and its driving factors:a review
Soil multifunctionality is an important component of ecosystem multifunctionality.Studying soil multifunctionality and its driving factors can provide a better understanding of the comprehensive abilities of soil and serve as a reference for managing and evaluating soil ecosystems.In this study,we conducted a bibliometric analysis of soil multifunctionality,expounded quantitative indicators and calculation methods,and analyzed the biotic and abiotic factors affecting soil multifunctionality.Future research directions are suggested based on the current research status and existing problems of soil multifunctionality.Bibliometrics revealed that studies on soil multifunctionality showed a gradual upward trend,mainly focusing on farmland and grassland ecosystems.This research focused on three aspects:soil microbial diversity,global change,and multi-factor interactions.The selected quantitative indicators were mainly related to the ecosystem carbon,nitrogen,and phosphorus cycles,and the commonly used calculation method was the average value method.Soil multifunctionality is affected by factors such as plant diversity,soil microbial diversity,and global change,which shows some differences.Future research on soil multifunctionality should focus on(1)clarifying the types and quantities of soil multifunctionality indicators,(2)optimizing the calculation method of the soil multifunctionality index,(3)exploring the driving mechanism of soil multifunctionality,(4)incorporating soil multifunctionality to improve the ecosystem service model,and(5)strengthening related research on forest soil multifunctionality.