Continuous organic mulching enhances the stability of soil organic carbon in Phyllostachys praecox: A 5-year in situ experiment

Research Objectives and Relevance Description:The central objective of this study is to gain an in-depth understanding of the impact of long-term organic mulching on the stability of soil organic carbon (SOC) in subtropical Moso bamboo (Phyllostachys praecox) forests and the underlying microbial mechanisms. By quantitatively analyzing the changes in particulate organic carbon (POC) and mineral-associated organic carbon (MAOC) under different mulching durations, this project aims to uncover how organic mulching influences the structure and function of soil microbial communities to regulate the dynamic balance of SOC. The relevance of the study is manifested in several aspects:1. Soil Carbon Cycle: Soil is one of the largest carbon reservoirs in terrestrial ecosystems, and its carbon storage and release have significant implications for the global carbon cycle and climate change. This study will contribute to revealing how soil management practices affect the fixation and stability of soil carbon.2. Sustainability of Agricultural Ecosystems: Organic mulching, as a common soil management technique, plays a crucial role in enhancing crop yields and soil quality. Understanding its impact on soil microbial diversity and function is essential for developing sustainable agricultural management strategies.3. Biogeochemical Processes: Soil microbial communities influence the decomposition and transformation of soil organic matter through their metabolic activities. This study will provide valuable data for understanding how microbes respond to environmental changes and participate in the soil carbon cycle.4.Ecosystem Services and Biodiversity: Soil microbial diversity and function are closely related to the health of ecosystems and their ability to provide ecosystem services. The results of this study will help assess and manage soil biodiversity to maintain and enhance ecosystem services.