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应用生态学报 ›› 2025, Vol. 36 ›› Issue (6): 1699-1707.doi: 10.13287/j.1001-9332.202506.001

• 研究论文 • 上一篇    下一篇

不同林龄樟子松人工林枯落物-根系-土壤碳氮磷化学计量特征

王荣潇1, 张颂安1, 高广磊1,2,3,4,5*, 丁国栋1,3,4,5, 张英1,3,4,5, 朱宾宾6   

  1. 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;
    6呼伦贝尔市林业和草原事业发展中心, 内蒙古呼伦贝尔 021000
  • 收稿日期:2024-12-16 接受日期:2025-03-20 出版日期:2025-06-18 发布日期:2025-12-18
  • 通讯作者: *E-mail: gaoguanglei@bjfu.edu.cn
  • 作者简介:王荣潇, 女, 2001年生, 硕士研究生。主要从事荒漠化防治研究。E-mail: wangrongxiao@bjfu.edu.cn
  • 基金资助:
    国家自然科学基金项目(32371962)

Characteristics of carbon, nitrogen and phosphorus stoichiometry in litter-root-soil of Pinus sylvestris var. mongolica plantations with different stand ages

WANG Rongxiao1, ZHANG Songan1, GAO Guanglei1,2,3,4,5*, DING Guodong1,3,4,5, ZHANG Ying1,3,4,5, ZHU Binbin6   

  1. 1School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China;
    2State Key Laboratory of Efficient Production of Forest Resources, Beijing 100083, China;
    3Yanchi Ecology Research Station of the Mu Us Desert, Yanchi 751500, Ningxia, China;
    4Engineering Research Center of Forestry Ecological Engineering, Ministry of Education, Beijing 100083, China;
    5Key Laboratory of State Forestry and Grassland Administration on Soil and Water Conservation, Beijing 100083, China;
    6Develonment Center of Forestry and Grassland in Hulunbuir, Hulunbuir 021000, Inner Mongolia, China
  • Received:2024-12-16 Accepted:2025-03-20 Online:2025-06-18 Published:2025-12-18

摘要: 为揭示樟子松人工林枯落物-根系-土壤碳(C)氮(N)磷(P)化学计量特征及其影响因素,以呼伦贝尔沙地27(中龄林)、38(近熟林)和47年生(成熟林)樟子松人工林为研究对象,樟子松天然林为对照,分析枯落物、根系和土壤有机碳、全氮、全磷含量及化学计量比。结果表明: 随林龄增加,樟子松人工林枯落物分解层N、P含量呈先减小后增加趋势,近熟林半分解层C∶N、C∶P显著高于中龄林和成熟林;天然林枯落物半分解层N含量显著低于人工林17.3%,分解层N∶P显著低于人工林16.2%。随林龄增加,人工林根系C含量呈增加趋势,N含量呈先减小后增加趋势;中龄林根系C∶N显著低于近熟林,中龄林和近熟林根系C∶P显著低于成熟林;人工林根系P含量显著高于天然林41.0%。人工林土壤C、P含量以及C∶N、C∶P均显著低于天然林;天然林根际土壤和非根际土壤N∶P分别为3.7和3.1,均显著低于人工林。枯落物化学计量特征变化的主要驱动因子是纤维素酶,根系和土壤则均为酸性磷酸酶。

关键词: 天然林, 人工林, 化学计量特征, 林龄, 樟子松

Abstract: To investigate the carbon (C), nitrogen (N), and phosphorus (P) stoichiometry of the litter-root-soil system and the driving factors for their variations in the Pinus sylvestris var. mongolica plantations, we analyzed the contents and stoichiometric ratios of organic carbon, total nitrogen and total phosphorus in litter, roots and soil across 27-year-old (middle-aged), 38-year-old (nearly-mature) and 47-year-old (mature) plantations in Hulunbuir sandy land, with natural forests as a control. The results showed that with increases of stand age, N and P contents showed a trend of decreasing and then increasing in the decomposing layer of the litter, and the C:N and C:P in semi-decomposing layer were significantly higher in near-mature than in middle-aged and mature plantations. The N content in the semi-decomposing layer of litter in natural forests was 17.3% lower than that in plantations. The N:P in the decomposing layer of natural forests was 16.2% lower than that in plantations. With the increases of stand age, root C content showed an increasing trend, and the N content exhibited a decreasing and then increasing trend. Root C:N of middle-aged was significantly lower than that in near-mature plantations. The root C:P of middle-aged and near-mature was significantly lower than that in mature plantations. Root P content was 41.0% higher than that in natural forests. The soil C and P content as well as the C:N and C:P were significantly lower in plantations than in natural forests. The rhizosphere and bulk soils of natural forests with N:P of 3.7 and 3.1 were significantly lower than that of plantations. Cellulase was the main driver of stoichiometric characteristics of litter, while acid phosphatase was the main driver for both root and soil.

Key words: natural forest, plantation, stoichiometric characteristic, stand age, Pinus sylvestris var. mongolica