干旱区研究

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2024 , Vol. 41 >Issue 8: 1354 - 1363

DOI: https://doi.org/10.13866/j.azr.2024.08.09

水土资源

呼伦贝尔沙地樟子松枯落物和土壤碳、氮、磷化学计量特征

  • 董鹏 ,
  • 任悦 ,
  • 高广磊 ,
  • 丁国栋 ,
  • 张英
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  • 1.北京林业大学水土保持学院，北京 100083
    2.林木资源高效生产全国重点实验室，北京 100083
    3.宁夏盐池毛乌素沙地生态系统国家定位观测研究站，宁夏 盐池 751500
    4.林业生态工程教育部工程研究中心，北京 100083
    5.水土保持国家林业和草原局重点实验室，北京 100083
董鹏（1997-），硕士研究生，主要研究方向为荒漠生态学. E-mail: DDB820650@bjfu.edu.cn
高广磊. E-mail: gaoguanglei@bjfu.edu.cn

收稿日期: 2024-01-10

  修回日期: 2024-05-27

  网络出版日期: 2024-08-22

基金资助

国家自然科学基金项目“樟子松人工林土壤-根际-根内真菌群落构建机制”(32371962)

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Stoichiometry of carbon, nitrogen, and phosphorus in the litter and soil of Pinus sylvestris var. mongolica in the Hulunbuir Sandy Land

  • DONG Peng ,
  • REN Yue ,
  • GAO Guanglei ,
  • DING Guodong ,
  • ZHANG Ying
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  • 1. School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China
    2. National Key Laboratory for Efficient Production of Forest Resources, Beijing 100083, China
    3. Yanchi Ecology Research Station of the Mu Us Desert, Yanchi 751500, Ningxia, China
    4. Engineering Research Center of Forestry Ecological Engineering, Beijing 100083, China
    5. Key Laboratory of State Forestry and Grassland Administration on Soil and Water Conservation, Beijing 100083, China

Received date: 2024-01-10

  Revised date: 2024-05-27

  Online published: 2024-08-22

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摘要

为了揭示呼伦贝尔沙地樟子松（Pinus sylvestris var. mongolica）枯落物和土壤C、N、P化学计量特征及其主要驱动因素。以不同龄组（中龄林、近熟林、成熟林）樟子松人工林和天然林为研究对象，分析枯落物和土壤C、N、P化学计量特征，并探究其与土壤因子间的相关关系。结果表明:（1） 分解程度显著影响枯落物C、N、P和C:N（P<0.05），土层显著影响土壤N、C:N、C:P（P<0.05），林龄及其与分解程度、土层的交互作用对枯落物和土壤C、N、P化学计量特征无显著影响（P>0.05）。天然林与人工林枯落物和土壤C、N含量和C:P、N:P存在显著差异（P<0.05）。（2） 枯落物C含量与枯落物N、P含量呈显著正相关（P<0.05），枯落物C:P与C:N呈显著正相关（P<0.05）；土壤C:P与土壤N:P、C:N呈显著正相关（P<0.05）。（3） 枯落物C、N、P化学计量特征主要受pH、磷酸酶和脲酶的显著影响（P<0.05），土壤C、N、P化学计量特征主要受pH、磷酸酶和转化酶的显著影响（P<0.05）。呼伦贝尔沙地樟子松林生长可能受氮限制，而枯落物分解可能受磷限制；枯落物和土壤C、N、P化学计量特征的主要驱动因子分别为pH和磷酸酶。研究结果对樟子松人工林经营管理具有指导意义。

关键词： 樟子松; 生态化学计量; 枯落物; 土壤; 林龄; 呼伦贝尔沙地

本文引用格式

董鹏 , 任悦 , 高广磊 , 丁国栋 , 张英 . 呼伦贝尔沙地樟子松枯落物和土壤碳、氮、磷化学计量特征[J]. 干旱区研究, 2024 , 41(8) : 1354 -1363 . DOI: 10.13866/j.azr.2024.08.09

Abstract

To reveal the characteristics of litter and soil C, N, and P stoichiometry and their main driving factors in the Hulunbuir Sandy Land. Different ages of Pinus sylvestris var. mongolica plantation forests and natural forests (medium-mature, near-mature, and mature forests) were used as research subjects to analyze the characteristics of litter and soil C, N, and P stoichiometry and their correlation with soil factors was explored. (1) The degree of decomposition significantly affected litter C, N, P, and the C:N ratio (P<0.05) and the soil layer significantly affected soil N and C:N and C:P ratios (P<0.05); however, the stand age of the forest and its interactions with the degree of decomposition and soil layer did not have a significant effect on litter and soil C, N, and P stoichiometric characteristics (P>0.05). There were significant differences (P<0.05) between natural and plantation forests in litter and soil relating to C and N contents and C:P and N:P ratios. (2) Litter C content was significantly and positively correlated with litter N and P content (P<0.05), and the litter C:P ratio was significantly and positively correlated with the C:N ratio (P<0.05); the soil C:P ratio was significantly and positively correlated with the soil N:P and C:N ratios (P<0.05). (3) The C, N, and P stoichiometric characteristics of litter were mainly significantly affected by pH, phosphatase, and urease (P<0.05), and the soil C, N and P stoichiometric characteristics were mainly significantly affected by pH, phosphatase, and convertase (P<0.05). The growth of P. sylvestris var. mongolica forest in the Hulunbuir Sandy Land may be limited by nitrogen, whereas the decomposition of litter may be limited by phosphorus; the main drivers of litter and soil C, N, and P stoichiometric characteristics were pH and phosphatase, respectively. This improved information is of great significance for guiding the management of P. sylvestris var. mongolica forests.

Key words： Pinus sylvestris var. mongolica; ecological stoichiometry; litter; soil; stand age; Hulunbuir Sandy Land

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