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应用生态学报 ›› 2017, Vol. 28 ›› Issue (9): 2888-2896.doi: 10.13287/j.1001-9332.201709.027

• 目次 • 上一篇    下一篇

温带森林不同海拔土壤有机碳及相关胞外酶活性特征

郭志明1,2, 张心昱1,2*, 李丹丹1, 董文亭3, 李美玲1   

  1. 1中国科学院地理科学与资源研究所生态系统网络观测与模拟重点实验室, 北京 100101
    2中国科学院大学资源与环境学院, 北京 100190
    3辽宁老秃顶子国家级自然保护区管理局, 辽宁本溪 117219
  • 收稿日期:2017-02-22 出版日期:2017-09-18 发布日期:2017-09-18
  • 通讯作者: * E-mail: zhangxy@igsnrr.ac.cn
  • 作者简介:郭志明, 男, 1992年生, 硕士研究生. 主要从事土壤碳循环研究. E-mail: guozhiming_ecology@163.com
  • 基金资助:

    本文由国家自然科学基金项目(31290222,41571130043,41571251)和中国科学院技术创新项目(201604)资助

Characteristics of soil organic carbon and related exo-enzyme activities at different altitudes in temperate forests.

GUO Zhi-ming1,2, ZHANG Xin-yu1,2*, LI Dan-dan1, DONG Wen-ting3, LI Mei-ling1   

  1. 1Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China;
    2College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100190, China;
    3Administration Agency of Liaoning Laotudingzi National Reserve, Benxi 117219, Liaoning, China.
  • Received:2017-02-22 Online:2017-09-18 Published:2017-09-18
  • Contact: * E-mail: zhangxy@igsnrr.ac.cn
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (31290222, 41571130043, 41571251), and the Technology Innovation Program of Chinese Academy of Sciences (201604)

摘要: 研究测定了老秃顶子温带森林生态系统7个海拔土壤不同形态碳和相关水解酶、氧化还原酶活性,分析了土壤有机碳及相关酶活性沿海拔梯度的影响因素.结果表明: 随海拔升高,土壤有机碳(SOC)、颗粒有机碳(POC)和可溶性有机碳(DOC)含量显著增加,而在海拔825~1233 m之间没有显著变化,DOC/SOC则显著下降;土壤α葡萄糖苷酶、β葡萄糖苷酶、木糖苷酶和纤维二糖水解酶活性显著增加;土壤SOC、POC、DOC、全氮(TN)含量及土壤含水量(SMC)与土壤水解酶活性呈显著正相关;过氧化物酶(POD)活性在低海拔(675 m)落叶松人工林显著低于其他海拔,POD活性与土壤碳氮(SOC、TN、POC、DOC)含量及SMC呈显著正相关,而土壤多酚氧化酶(PPO)活性在海拔947 m落叶阔叶林带和海拔825 m红松林中较高,且仅与土壤pH呈显著正相关,表明土壤酸度是驱动PPO酶活性的主要因素.在温带森林生态系统中,土壤养分含量和含水量是影响土壤水解酶海拔分布的重要因素.

Abstract: We measured soil organic carbon contents, hydrolase and oxidoreductase activities relating to carbon cycling at 7 different altitudes of Laotudingzi Mountain in temperate forest ecosystem, and studied the affecting factors of soil organic carbon contents and the related soil extracellular enzyme activities along the altitude. The results showed that soil organic carbon (SOC), particulate organic carbon (POC) and dissolved organic carbon (DOC) contents increased significantly with altitude except between 825-1233 m, and DOC/SOC decreased significantly with altitude. The activities of α-glucosidase, β-glucosidase, β-xylosidase and cellobiohydrolase increased significantly with altitude, and the hydrolase activities were significantly and positively correlated with SOC, POC, DOC, total nitrogen (TN) and soil moisture contents (SMC). Peroxidase (POD) activity was significantly lower at 675 m in Larix gmelinii plantation than at the other altitudes, and was positively correlated with soil nutrient contents (SOC, TN, POC, DOC) and soil moisture. Polyphenol oxidase (PPO) activity was higher in Korean pine plantation at 825 m and in deciduous broad-leaved forest at 947 m than at the other altitudes, and PPO activity was only positively correlated with soil pH, suggesting that soil acidity was a major factor influencing PPO activity. Soil nutrient and water contents were important factors that influenced the distribution of soil hydrolase along altitude in temperate forest ecosystem.