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Forest and Grassland Resources Research >

2018 , Vol. 0 >Issue 6: 117 - 124

DOI: https://doi.org/10.13466/j.cnki.lyzygl.2018.06.019

Scientific Research

Ecological Stoichiometry Characteristics of Soils in Eucalyptus Plantations with Different Ages in North Guangxi

  • Chunyan DUAN ,
  • Guangping XU ,
  • Yuyi SHEN ,
  • Yajin LUO ,
  • Yanqiong LI ,
  • Denan ZHANG ,
  • Yingjie SUN ,
  • Chengxin HE
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  • 1. Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection,Guangxi Normal University,Ministry of Education,Guilin 541004,Guangxi,China
    2. Guangxi Key Laboratory of Plant Conservation and Restoration Ecology in Karst Terrain,Guangxi Institute of Botany,Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences,Guilin 541006,Guangxi,China
    3. Guangxi Key Laboratory of Functional Phytochemicals Research and Utilization,Guangxi Institute of Botany,Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences,Guilin 541006,Guangxi,China
    4. Administration Bureau of Yachang Orchid National Nature Reserve,Baise,Guangxi 533209,Guangxi,China
    5. College of Life Sciences,Guangxi Normal University,Guilin 541004,Guangxi,China

Received date: 2018-07-02

  Revised date: 2018-09-14

  Online published: 2020-09-27

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Abstract

By using the space-time intergenerational method,the Eucalyptus plantations of different ages of plantation in low hilly areas at Guangxi were taken as the research object.The effects of forest age on soil organic carbon(SOC),total nitrogen(TN),total phosphorus(TP) and total potassium(TK) and their ecological stoichiometric characteristics of soils were studied.The results showed that:1)With the increase of Eucalyptus forest age,SOC showed a trend of increasing first,then decreasing and increasing again.TN had not evident regular change.It showed that the trend of decreasing first and then increasing later for TK.SOC,TN,TP and TK concent in the five different plantations decreased significantly with the increase of soil depth.2) The C:N,C:P,N:P and C:K ratios of soil increased significantly with the growth of forest age.The N:K ratios increased first and then decreased.There are no obvious regular patterns for P:K ratios of soil.The C:N ratios increased with the increase of soil depth,the N:P and N:K ratios decreased on the contrary,but C:P,C:K and P:K ratios showed no consistent pattern.3) It showed that significant positive correlation was found between SOC content and C:P ratios,N:P ratios and N/K ratios;among TN content,N:P ratios and N:K ratios;between TP content and N:K ratios and between TK content and N:P ratios.Different forest ages and soil depths all affected the distribution and utilization of soil nutrients.In general,the ecological stoichiometric ratios of soils from surface are higher than those of sub-layer soil.It will provide the scientific basis for the restoration of the forest ecosystem in Guangxi Province.

Key words： Eucalyptus plantations; forest age; soil nutrient; ecological stoichiometry characteristic; hilly area of northern Guangxi

Cite this article

Chunyan DUAN , Guangping XU , Yuyi SHEN , Yajin LUO , Yanqiong LI , Denan ZHANG , Yingjie SUN , Chengxin HE . Ecological Stoichiometry Characteristics of Soils in Eucalyptus Plantations with Different Ages in North Guangxi[J]. Forest and Grassland Resources Research, 2018 , 0(6) : 117 -124 . DOI: 10.13466/j.cnki.lyzygl.2018.06.019

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