植物研究2024，Vol.44Issue(3)：470-480,11.DOI:10.7525/j.issn.1673-5102.2024.03.016
四川米仓山水青冈天然林下不同植物群落的土壤酶活性及化学计量特征
Soil Enzyme Activities and Stoichiometric Characteristics of Different Plant Communities under Natural Fagus Forest in Micang Mountain Nature Reserve,Sichuan
摘要
Abstract
In this study,the soil enzyme activities,stoichiometric characteristics and major environmental factors of Sarcococca ruscifolia and Fargesia spathacea communities at different depths(0<h≤10 cm,10 cm<h≤20 cm)were examined in the natural Fagus forest in Micang Mountain Nature Reserve,Sichuan.The results showed that:(1)In different understory plant communities,the total nitrogen(TN)content in plantless community was higher than that in plant community soil.At the soil depth of 10 cm<h≤20 cm,the contents of total carbon(TC)and soil available nitrogen(SAN)were the highest in the S.ruscifolia community.(2)The soil enzyme activities(acid phosphatase(AP),1,4-β-N-acetylglucosaminidase(NAG))in the S.ruscifolia community were significantly higher than those in the no plant community and the F.spathacea community,and the activities of β-glucosidase(BG)and leucine aminopeptidase(LAP)were the highest in the F.spathacea community.The activities of polyphenol oxidase(PPO)and peroxidase(POD)in plant community were significantly higher than those in no plant community.(3)Soil enzyme activities of BG,LAP,PPO and POD were significantly positively correlated with soil pH,and soil enzyme activities(except cellobiohydrolase(CBH))were significantly positively correlated with soil moisture content.The results of redundancy analysis(RDA)showed that soil moisture content,SAN and TC content explained 51.4%,40.5%and 37.7%of the variation of soil enzyme activity and its stoichiometric characteristics,respectively.(4)The vector angle(VA)was greater than 45°,suggesting that soil microorganisms were more susceptible to phosphorus restriction.The results indicated that different understory plant communities could affect soil physical and chemical properties and soil enzyme activities and their stoichiometric characteristics were mainly regulated by soil moisture content,SAN and TC content.关键词
林下植被/土壤酶活性/养分限制/水青冈天然林/米仓山自然保护区Key words
understory vegetation/soil enzyme activity/nutrient restriction/natural forest of Fagus/Micang Mountain Nature Reserve分类
农业科技引用本文复制引用
罗莉娟,尹清孝,孙伟,昝玺,史清茂,张晶,陈亚梅,胥晓..四川米仓山水青冈天然林下不同植物群落的土壤酶活性及化学计量特征[J].植物研究,2024,44(3):470-480,11.基金项目
四川省科技厅项目(2022JDR0306) （2022JDR0306）
西华师范大学基本科研专项基金项目(20E061) （20E061）
四川米仓山自然保护区大样地建设(一期)项目(2020). （一期）
