应用生态学报2024，Vol.35Issue(6)：1501-1508,8.DOI:10.13287/j.1001-9332.202406.008
亚热带三种林分土壤酶活性和酶化学计量比特征
Characterizations of soil enzyme activities and stoichiometry in three subtropical forest stands
摘要
Abstract
We conducted in a common garden experiment to explore the differences in soil enzyme activity,stoichi-ometry,and their influencing factors among a secondary Castanopsis carlesii forest,10-year-old C.carlesii planta-tion,and Cunninghamia lanceolata plantation.The results showed that compared to the secondary forest,the soil organic carbon,total nitrogen,and dissolved organic carbon significantly decreased by 42.6％,47.4％,and 60.9％in C.carlesii plantation,and by 42.9％,36.7％,and 61.1％in C.lanceolata plantation.Soil microbial biomass C,microbial biomass N(MBN),and microbial biomass phosphorus decreased significantly by 40.6％,35.5％,and 45.9％in C.carlesii plantation,and by 53.7％、56.4％,and 61.7％in C.lanceolata plantation.Compared to the secondary forest,soil enzymes activities in C.carlesii plantation did not change significantly,but in C.lanceolata plantation,the activities of β-1,4-glucosidase and cellobiohydrolase significantly decreased by 51.2％and 59.8％,β-N-acetyl glucosaminidase and acid phosphatase decreased significantly by 41.0％and 29.8％,and enzymatic C:N acquisition ratio and enzymatic C:P acquisition ratio significantly decreased by 11.3％and 7.7％,respectively.Results of redundancy analysis indicated that MBN and NO3--N were the primary factors influencing soil enzyme activity and enzymic stoichiometry.Collectively,there were significant differences in soil enzyme activity and micro-bial nutrient demands among different forest stands.Compared to secondary forests,the establishment of C.lanceo-lata plantations would intensify nutrient competition between plants and microbes,and exacerbate the N and P limi-tations for microbes.关键词
土壤胞外酶/亚热带地区/养分限制/土壤微生物Key words
soil extracellular enzyme/subtropical region/nutrient limitation/soil microorganism引用本文复制引用
韩子琛,郭强,夏允,杨柳明,范跃新,杨玉盛..亚热带三种林分土壤酶活性和酶化学计量比特征[J].应用生态学报,2024,35(6):1501-1508,8.基金项目
本文由国家自然科学基金项目(32371674,32171587,41977090)资助. （32371674,32171587,41977090）
