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Forest and Grassland Resources Research >

2023 , Vol. 0 >Issue 5: 72 - 79

DOI: https://doi.org/10.13466/j.cnki.lczyyj.2023.05.009

Scientific Research

Fine Root Carbon,Nitrogen and Phosphorus Stoichiometry and Storage in Different Stand Ages of Soft-Broadleaved Forests in Guangxi

  • Ziwen LIAN ,
  • Rongwei HUANG ,
  • Hu DU ,
  • Fuping ZENG ,
  • Wanxia PENG ,
  • Lichu YIN
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  • 1. College of Resources,Hunan Agricultural University,Changsha 410125,China
    2. Key Laboratory of Agro-ecological Processes in Subtropical Region,Institute of Subtropical Agriculture,Chinese Academy of Sciences,Changsha 410125,China
    3. Huanjiang Maonan Autonomous County Forestry and Grassland Bureau,Huanjiang,Guangxi 547100,China

Received date: 2023-08-24

  Revised date: 2023-10-13

  Online published: 2023-12-20

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Abstract

The objective of this research was to investigate different stand age classes of fine root carbon(C),nitrogen(N)and phosphorus(P)stoichiometric characteristics and their storages.Five representative soft-broadleaved forests were selected as the research objects.Fine root samples were taken at depth intervals of 0~<20 cm and 20~40 cm soil layers in each sample-plot for indoor measurements.And the variation laws were investigated for different age classes and different soil layers for the fine root C,N,P stoichiometric characteristics and their storages in GuangXi soft-broadleaved forests.The result showed that:1)the C content of fine roots did not have a significant change with the change of forest stand ages and soil layers.The N and P contents of the fine roots differed significantly for different stand ages.While their highest values were both found in mature forest,their lowest values were found in middle-aged and pre-mature forest,respectively.2)As the forest grows older,the C/N of fine roots showed a downward trend,and the C/P and N/P normally showed a trend of first increasing and then decreasing.3)The average distribution of fine root biomass and C,N and P storage in soft broad-leaf forests in Guangxi were 7.77~12.26 t/hm2,3 324.18~4 974.21 kg/hm2,44.06~103.36 kg/hm2,7.19~13.62kg/hm2,respectively.4)The fine root C,N,P storage and biomass of soft-broadleaved forest in Guangxi showed a decreasing trend with the deepening of soil layer and the growth of forest age.Fine root growth in soft-broadleaved forest was generally limited by nitrogen.Nitrogen input should be emphasized in each stand ages of soft-broadleaved forest.

Key words： stand ages; soft-broadleaved forest; fine root; stoichiometric characteristics; carbon; nitrogen and phosphorus storage

Cite this article

Ziwen LIAN , Rongwei HUANG , Hu DU , Fuping ZENG , Wanxia PENG , Lichu YIN . Fine Root Carbon,Nitrogen and Phosphorus Stoichiometry and Storage in Different Stand Ages of Soft-Broadleaved Forests in Guangxi[J]. Forest and Grassland Resources Research, 2023 , 0(5) : 72 -79 . DOI: 10.13466/j.cnki.lczyyj.2023.05.009

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