生态环境学报 ›› 2023, Vol. 32 ›› Issue (1): 80-89.DOI: 10.16258/j.cnki.1674-5906.2023.01.009

• 研究论文 • 上一篇    下一篇

南岭山地不同海拔土壤生态化学计量特征及影响因素

黄伟佳1,2,3(), 刘春1, 刘岳4, 黄斌2,3, 李定强2,3, 袁再健2,3,*()   

  1. 1.暨南大学生命科学技术学院,广东 广州 510632
    2.广东省科学院生态环境与土壤研究所/华南土壤污染控制与修复国家地方联合工程研究中心/广东省农业环境综合治理重点实验室/广东省面源污染防治工程技术研究中心,广东 广州 510650
    3.梅州市国际水土保持研究院,广东 梅州 514000
    4.江西省地质调查勘查院,江西 南昌 330201
  • 收稿日期:2022-08-10 出版日期:2023-01-18 发布日期:2023-04-06
  • 通讯作者: *袁再健(1976年生),男,教授,博士,主要从事水土保持、面源污染与生态水文等方面的研究。E-mail: zjyuan@soil.gd.cn
  • 作者简介:黄伟佳(1997年生),女,硕士研究生,主要研究方向为土壤碳循环。E-mail: 976652113@qq.com
  • 基金资助:
    广东省重点研发计划项目(2020B1111530001);广东省科技计划项目(2021B1212050019);广东省科技计划项目(2018B030324001);广东省科技计划项目(2022A050509005);广东省科学院专项资金项目(2022GDASZH-2022010203);广东省科学院专项资金项目(2022GDASZH-2022010105);梅州市科技计划项目(2020B0204001)

Soil Ecological Stoichiometry and Its Influencing Factors at Different Elevations in Nanling Mountains

HUANG Weijia1,2,3(), LIU Chun1, LIU Yue4, HUANG Bin2,3, LI Dingqiang2,3, YUAN Zaijian2,3,*()   

  1. 1. College of Life Science and Technology, Jinan University, Guangzhou 510632, P. R. China
    2. National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China/Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management/Guangdong Engineering Research Center for Non-point Source Pollution Control/Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, P. R. China
    3. International Institute of Soil and Water Conservation, Meizhou 514000, P. R. China
    4. Jiangxi Geological Survey and Exploration Institute, Nanchang 330201, P. R. China
  • Received:2022-08-10 Online:2023-01-18 Published:2023-04-06

摘要:

土壤生态化学计量比是表征土壤养分需求与限制的重要指标。为了探究不同海拔梯度土壤生态化学计量特征,选择南岭山地不同海拔土壤为研究对象,分层采集不同海拔0—60 cm土壤,通过测定土壤基本理化性质、微生物生物量碳氮磷和土壤酶活性,分析南岭不同海拔梯度山地土壤养分、微生物生物量碳氮磷、酶活性及其生态化学计量比特征及影响因素。研究结果表明:(1)土壤有机碳(TOC)、总氮(TN)、总磷(TP)、微生物量氮(MBN)、微生物量磷(MBP)含量和β-葡萄糖苷酶(BG)活性在中高海拔处高于低海拔处,而微生物量碳(MBC)含量、N-乙酰-β-氨基葡萄糖苷酶(NAG)和酸性磷酸酶(AP)活性沿海拔呈现波动变化,其中MBC含量,NAG和AP活性分别在402、809和402 m处到达最高;(2)土壤w(C)/w(N)w(MBC)/w(MBN)w(MBC)/w(MBP)w(MBN)/w(MBP)、NAG:AP均在809 m处最高,土壤w(C)/w(P)w(N)/w(P)、BG:AP均在1364 m处最高,土壤BG:NAG在1536 m处最高;(3)土壤含水率、TOC、TN分别解释了土壤各化学计量比的25.0%、17.9%、13.6%。其中,含水率与w(N)/w(P)显著正相关(P<0.05),与BG:NAG极显著正相关(P<0.01),与w(MBC)/w(MBP)、NAG:AP极显著负相关(P<0.01),与w(MBN)/w(MBP)显著负相关(P<0.05);TOC与w(C)/w(P)w(N)/w(P)、BG:AP极显著正相关(P<0.01);TN与w(N)/w(P)极显著正相关(P<0.01),与w(C)/w(P)、BG:NAG、BG:AP显著正相关(P<0.05),与w(C)/w(N)显著负相关(P<0.05)。南岭山地土壤养分、微生物量、酶活性化学计量比有明显的海拔梯度变化特征,土壤理化性质对土壤化学计量比具有重要的影响,对于深入研究南岭山地土壤养分平衡状况和限制因素具有重要的意义。

关键词: 南岭山地, 海拔, 养分, 微生物量碳氮磷, 土壤酶, 化学计量

Abstract:

Soil ecological stoichiometry is an important index to characterize soil nutrient requirement and limitation. In order to explore the ecological stoichiometry characteristics of soils at different altitude gradients, soils at different altitudes in Nanling Mountains were selected as the research objects. The soils (0-60 cm) at different altitudes were stratified and collected. The characteristics of soil nutrients, microbial biomass C, N, P, enzyme activities and their ecological stoichiometric ratios and the influencing factors in different elevation gradients of Nanling mountains were analyzed. The results show that: (1) The contents of soil organic carbon (TOC), total nitrogen (TN), total phosphorus (TP), microbial biomass nitrogen (MBN), microbial biomass phosphorus (MBP) and β-glucosidase (BG) activity were higher at middle and high altitudes than at low altitudes. The microbial biomass carbon (MBC) content, N-1, 4-acetyl-β-glucosaminidase (NAG) and acid phosphatase (AP) activities fluctuated along the altitude, and the MBC content, NAG activity and AP activity was highest at 402 m, 809 m and 402 m, respectively. (2) Soil w(C)/w(N), w(MBC)/w(MBN), w(MBC)/w(MBP), w(MBN)/w(MBP), NAG:AP were the highest at 809 m, soil w(C)/w(P), w(N)/w(P), BG:AP were the highest at 1364 m, and soil BG:NAG was the highest at 1536 m. (3) Soil moisture content, TOC and TN accounted for 25.0%, 17.9% and 13.6% of soil stoichiometric ratios, respectively. Water content was significantly positively correlated with w(N)/w(P) (P<0.05), was very significantly positively correlated with BG:NAG (P<0.01) and very significantly negatively correlated with w(MBC)/w(MBP) and NAG:AP (P<0.01) and significantly negatively correlated with w(MBN)/w(MBP) (P<0.05); TOC was very significantly positively correlated with w(C)/w(P), w(N)/w(P), BG:AP (P<0.01); TN was very significantly positively correlated with w(N)/w(P) (P<0.01), was significantly positively correlated with w(C)/w(P)、BG:NAG, BG:AP (P<0.05) and significantly negatively correlated with w(C)/w(N) (P<0.05). Soil nutrients, microbial biomass and enzyme activity stoichiometric ratio in Nanling mountains had obvious elevation gradient changes. Soil physical and chemical properties had important effects on soil stoichiometric ratio, which was of great significance for further study of soil nutrient balance and limiting factors in Nanling mountains.

Key words: Nanling Mountains, elevation gradient, nutrient, microbial biomass carbon, nitrogen and phosphorus, soil enzymes, stoichiometry

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