茶叶科学2025，Vol.45Issue(2)：234-252,19.
森林转化为茶园及其管理对土壤碳、氮库的影响和调控机制初探
The Impacts and Regulatory Mechanisms of Forest Conversion to Tea Plantations and Their Management on Soil Carbon and Nitrogen Pools
摘要
Abstract
This study investigated how the conversion of forests to tea plantations and associated management practices affect the dynamics of carbon(C)and nitrogen(N)fractions across soil profiles in tea agroecosystems,with a focus on fungal community-mediated regulatory mechanisms.We compared forest soils with tea plantation soils under low-,medium-,and high-intensity fertilization regimes.Soil cores were systematically collected from four depth intervals(0-10 cm,10-20 cm,20-40 cm,and 40-60 cm)to analyze vertical stratification of C/N fractions,nutrient stoichiometry,and fungal community composition.The results reveal that tea plantations management significantly enhanced soil organic carbon and total nitrogen contents in the 0-10 cm soil layer compared to forest soil.Under high-input conditions,total carbon and nitrogen reached 46.57 g·kg-1 and 5.13 g·kg-1,respectively,increasing by 68.12％and 88.60％compared to low-input tea plantations.Land-use conversion and fertilization intensity gradients in tea plantations significantly modified fungal community structure and composition,with these changes being mainly driven by soil nutrient availability,including available phosphorus(AP),available potassium(AK),and total nitrogen(TN).In addition,fungal richness demonstrates a progressive decline across soil depth gradients(0-60 cm).Further analyses reveals that Dothideomycetes and Umbelopsidiomycetes exhibited significant positive correlations with soil C and N fractions,whereas Mortierellomycetes,Geminibasidiomycetes and Mucoromycotina_cls_Incertae_sedis showed pronounced negative correlations.Variations in the relative abundance of these taxa may strongly influence carbon and nitrogen cycling in tea plantation soils.Therefore,the conversion of forests to tea plantations and different fertilization management practices regulate soil carbon and nitrogen accumulation by influencing the structure of soil fungal communities and the abundance of dominant taxa.关键词
土地利用/碳库/氮库/茶园/肥料管理/真菌微生物群落Key words
land use/carbon pool/nitrogen pool/tea plantation/fertilizer management/fungi microbial community分类
农业科学引用本文复制引用
黄福印,颜鹏,张少博,胡强,罗莹,董雅洁,张洁,李鑫,付建玉,王华森..森林转化为茶园及其管理对土壤碳、氮库的影响和调控机制初探[J].茶叶科学,2025,45(2):234-252,19.基金项目
浙江省重点研发计划(2022C02046)、浙江省三农九方科技合作项目(2024SNJF031)、中央级公益性科研院所基本科研业务费专项(CAAS-ZDRW202417) （2022C02046）
