文献类型：期刊文献

中文题名：滇南亚热带森林正向演替过程中土壤-酶耦合变化特征

英文题名：Coupling Characteristics of Soil Properties and Enzyme along with Succession of Subtropical Forests in Southern Yunnan

作者：尚瑞广[1,2,3] 李艳杰[1] 李先泽[4] 王柯人[1] 袁跃[4] 苏建荣[1,2,3]

第一作者：尚瑞广

机构：[1]中国林业科学研究院高原林业研究所,云南昆明650224;[2]国家林业和草原局云南普洱森林生态系统定位观测研究站,云南普洱665007;[3]普洱森林生态系统云南省野外科学观测研究站,云南普洱665007;[4]普洱市思茅区万掌山林场,云南普洱665007

年份：2025

卷号：38

期号：6

起止页码：128-138

中文期刊名：林业科学研究

外文期刊名：Forest Research

收录：;北大核心:【北大核心2023】；

基金：国家重点研发计划(2023YFE0112805-02);云南省基础研究计划(202401AT070018)。

语种：中文

中文关键词：思茅松;演替;土壤理化性质;酶活性;化学计量比

外文关键词：Pinus kesiya;succession;soil physical and chemical properties;enzyme activity;stoichiometric ratio

分类号：S714.2

摘要：[目的]系统探究滇南亚热带森林生态系统正向演替过程中土壤理化性质与酶活性特征及协同演变规律。[方法]采用空间代替时间的研究方法,以思茅松次生林(PKF)、针阔混交林(MCB)和季风常绿阔叶林(MEB)为研究对象,系统分析不同演替阶段土壤理化性质、酶活性及其化学计量比的变化特征,用相关分析、冗余分析等方法解析土壤特性及其酶活性间的关系。[结果]从PKF到MEB演替过程中,土壤理化性质显著改善,土壤孔隙度(SP)、田间最大持水量(SWHC)及主要养分含量均显著提高;土壤C:N由21.25显著降至15.28、N:P由4.70显著升至7.45(p<0.05),表明土壤养分可能由氮限制向磷限制转变。土壤酶活性及酶化学计量比也发生明显改变,MEB阶段的脲酶(Ure)、β-葡糖苷酶(BG)、β-1,4-N-乙酰葡糖胺糖苷酶(NAG)和酸性磷酸酶(ACP)活性比PKF阶段分别显著增加73.25%、41.07%、70.03%和176.14%(p<0.05)。冗余分析显示,土壤全氮(TN)、有机碳含量(SOC)和最大持水量(SWHC)是影响酶活性的主要因子,而土壤密度(BD)、N:P和p H则主导酶化学计量比的变化。[结论]土壤养分特征与酶活性可作为评价滇南亚热带森林演替过程中土壤质量变化的有效指标,研究结果可为该区域退化森林生态系统的恢复与可持续经营提供科学依据。
[Objective]To systematically investigate the characteristics and synergistic evolution of soil physicochemical properties and enzyme activities during the positive succession of subtropical forests in southern Yunnan.[Methods]Using a space-for-time substitution approach,this research focused on three natural forest types at different successional stages:Pinus kesiya secondary forest(PKF),mixed coniferous-broadleaf forest(MCB),and monsoon evergreen broadleaf forest(MEB).We systematically analyzed the variations in soil physicochemical properties,enzyme activities,and their stoichiometric ratios across these stages.Correlation analysis and redundancy analysis were employed to elucidate relationships between soil characteristics and enzyme activities.[Results]From PKF to MEB,soil condition improved significantly,with notable increases in porosity,maximum water-holding capacity,and nutrient content.The soil C:N ratio significantly declined from 21.25 to 15.28,while the N:P ratio significantly increased from 4.70 to 7.45(p<0.05),suggesting a shift from nitrogen toward phosphorus limitation.Soil enzyme activities and their stoichiometric ratios also exhibited significant changes.In MEB stage,activities of urease(Ure),β-glucosidase(BG),β-1,4-N-acetylglucosaminidase(NAG),and acid phosphatase(ACP)were 73.25%,41.07%,70.03%,and 176.14%higher,respectively,than those in PKF(p<0.05).Redundancy analysis revealed that soil total nitrogen(TN),soil organic carbon(SOC),and maximum water-holding capacity(SWHC)were the primary factors influencing enzyme activities,while soil bulk density(BD),N:P ratio,and pH predominantly drove variation in enzyme stoichiometric ratios.[Conclusion]Soil nutrient characteristics and enzyme activities are effective indicators of soil quality change during forest succession in southern Yunnan.These findings provide a scientific basis for the restoration and sustainable management of degraded forest ecosystems in this region.