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Forest and Grassland Resources Research >

2022 , Vol. 0 >Issue 3: 96 - 103

DOI: https://doi.org/10.13466/j.cnki.lyzygl.2022.03.015

Scientific Research

Effects of Management Methods on Soil Organic Carbon, Nitrogen and Phosphorus in Oak Secondary Forests

  • Zeyu OU ,
  • Zhen PENG ,
  • Yuanyuan WANG ,
  • Xidan ZHANG ,
  • Feng RAO ,
  • Peilin XIE ,
  • Pan WAN
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  • College of Forestry,Northwest A&F University,Yangling,Shaanxi 712100,China

Received date: 2022-04-19

  Revised date: 2022-05-16

  Online published: 2022-08-04

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Abstract

Taking oak secondary forests in Xiaolongshan,Tianshui,Gansu Province as the research subject,the differences of soil organic carbon (SOC),total nitrogen (TN) and total phosphorus (TP) contents in 0-30cm soil under different management methods were compared after 8 years of management,and their distribution and stoichiometric characteristics were analyzed to provide reference for forest management in this area.In this study,using unmanaged (UC) as a control,3 management methods of close to natural forest management (CNFM: thinning of target trees),structure-based forest management (SBFM: thinning of optimized forest spatial structure) and secondary forest comprehensive silvicuture (SFCS: thinning of reduced stand density) were compared.The results showed as follows: 1) Soil SOC,TN and TP increased in SBFM,while SOIL TP increased in CNFM.Soil SOC and TN were enriched in soil surface and showed a decreasing trend.Soil TP decreased first and then increased in CNFM and SBFM,but decreased in SFCS.2) Soil C:N increased after management,while soil C:P and N:P decreased significantly in CNFM and SBFM.With the increase of soil depth,C:P and N:P showed a decreasing trend,but the law of C:N was not obvious.3) Correlation analysis showed that N dominated SOC changes and P controlled SFCS.In conclusion,managements changed the soil nutrient structure,soil SOC decomposition slowed down,the availability of P increased,and the restriction of N intensified after management.SBMF had a good effect on improving soil nutrients and increasing carbon sink,so it was suggested to adopt this management model in this area.

Key words： natural oak secondary forest; structure-based forest management; soil organic carbon; stoichiometry

Cite this article

Zeyu OU , Zhen PENG , Yuanyuan WANG , Xidan ZHANG , Feng RAO , Peilin XIE , Pan WAN . Effects of Management Methods on Soil Organic Carbon, Nitrogen and Phosphorus in Oak Secondary Forests[J]. Forest and Grassland Resources Research, 2022 , 0(3) : 96 -103 . DOI: 10.13466/j.cnki.lyzygl.2022.03.015

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