期刊论文

Characteristics of soil microbial biomass carbon,nitrogen and enzyme activities in Picea asperata plantations with different ages in subalpine of western Sichuan,China

中文

生态学报

1000-0933

2021

41

14

5632-5642

10.5846/stxb202008192158

国家重点研发课题（2017YFC0505004）； 四川省环境治理与生态保护重大科技专项（2018SZDZX0031）； 森林和湿地生态恢复与保育四川重点实验室开放课题（2019KFKT03）；

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林分结构随林龄增加发生变化，致使土壤微环境变化，进而对土壤微生物生物量和酶活性产生直接或间接影响。本研究以川西亚高山米亚罗林区25、40、50和60年生紫果云杉（Picea purpurea）人工林表层（0—20 cm）土壤为研究对象，分析不同林龄表层土壤微生物生物量碳（MBC）、氮（MBN）和酶活性的变化以及驱动土壤酶活性变化的主要环境因子，为人工林生态系统恢复效果评价及经营管理提供科学依据。结果表明：随着林龄的增加，MBC和MBN先上升后下降，在40年生达到最大；β-葡萄糖苷酶（βG）、β-N-乙酰氨基葡萄糖苷酶（NAG）和多酚氧化酶（PHO）活性与微生物生物量碳氮变化趋势相似，其中βG、NAG活...

Stand structure changes with forest age caused the variation of soil microenvironment,which can directly or indirectly affect soil microbial biomass carbon and nitrogen,and soil enzyme activities. To better understand the change characteristics of soil microbial biomass contents and enzyme activities along an age sequence of spruce plantations,this study was conducted to evaluate the theoretical basis for restoration and effective management of subalpine plantations. In this study,Picea asperata plantations of various ages (25,40,50,and 60 year...