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应用生态学报 ›› 2018, Vol. 29 ›› Issue (7): 2211-2216.doi: 10.13287/j.1001-9332.201807.008

• 研究报告 • 上一篇    下一篇

高寒灌丛生长季土壤转化酶与脲酶活性对增温和植物去除的响应

马志良1,2, 赵文强1, 刘美1,2,3, 朱攀1, 刘庆1*   

  1. 1中国科学院成都生物研究所, 中国科学院山地生态恢复与生物资源利用重点实验室/生态恢复与生物多样性保育四川省重点实验室, 成都 610041;
    2中国科学院大学, 北京 100049;
    3绵阳师范学院, 生态安全与保护四川省重点实验室, 四川绵阳 621000
  • 收稿日期:2017-10-13 出版日期:2018-07-18 发布日期:2018-07-18
  • 通讯作者: *E-mail: liuqing@cib.ac.cn
  • 作者简介:马志良, 男, 1988年生, 博士研究生. 主要从事高寒灌丛生态系统土壤碳循环过程研究. E-mail: feng281@126.com
  • 基金资助:

    本文由国家自然科学基金项目(31570476)和国家科技基础性工作专项(2015FY110300)资助.

Responses of soil invertase and urease activities to warming and plant removal during the growing season in an alpine scrub ecosystem.

MA Zhi-liang1,2, ZHAO Wen-qiang1, LIU Mei1,2,3, ZHU Pan1, LIU Qing1*   

  1. 1Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization, Chinese Academy of Sciences/Sichuan Province Key Laboratory of Ecological Restoration and Biodiversity Conservation, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China;
    2University of Chinese Academy of Sciences, Beijing 100049, China;
    3Sichuan Province Key Laboratory of Ecological Security and Protection, Mianyang Teachers’College, Mianyang 621000, Sichuan, China
  • Received:2017-10-13 Online:2018-07-18 Published:2018-07-18
  • Contact: *E-mail: liuqing@cib.ac.cn
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (31570476) and the National Science and Technology Basic Work Project (2015FY110300).

摘要: 对青藏高原东缘窄叶鲜卑花土壤转化酶与脲酶活性对增温(0.6~1.3 ℃)和植物去除的响应进行研究,以了解气候变暖和植被干扰对高寒灌丛生长季不同时期土壤生态过程的影响.结果表明: 增温在整个生长季节使去除/不去除植物处理土壤转化酶活性显著增加了3.7%~13.3%.增温除在生长季末期对不去除植物处理土壤脲酶活性影响不显著以外,在其他时期使去除/不去除植物处理土壤脲酶活性显著增加10.8%~56.3%.去除植物处理对土壤转化酶与脲酶活性的影响因增温与生长季节而存在显著差异.去除植物显著降低了不增温样方生长季初期和末期与增温样方整个生长季节土壤转化酶活性,而没有显著影响生长季中期不增温样方土壤转化酶活性.去除植物仅在生长季末期使不增温样方土壤脲酶活性显著降低了10.5%;而在增温样方,去除植物仅在生长季初期和中期使土壤脲酶活性显著降低16.0%~18.7%.以上结果有利于全面认识高寒灌丛生态系统土壤碳氮循环过程.

Abstract: To understand the effects of climate warming and vegetation disturbance on soil ecological process during different stages of growing season in the alpine scrub ecosystem, the responses of soil invertase and urease activities to warming (0.6-1.3 ℃) and plant removal were investigated in a Sibiraea angustata scrubland on the eastern Qinghai-Tibetan Plateau, China. The results showed that experimental warming significantly increased soil invertase activity by 3.7%-13.3% in the removal- and unremoval-plant plots throughout the entire growing season. Warming significantly increased soil urease activity by 10.8%-56.3% in the removal- and unremoval-plant plots, except the late growing stage, during which warming had no significant effect on soil urease activity in the unremoval-plant plots. The effects of plant removal treatments on soil invertase and urease activities varied with warming and growing stages. Plant removal significantly decreased soil invertase activity of the warmed plots during the entire growing season and the unwarmed plots during the early and late growing stages, but did not affect soil invertase activity in the unwarmed plots during the mid-growing stage. Plant removal only significantly decreased soil urease activity by 10.5% in the unwarmed plots during the late growing stage. However, in the warmed plots, plant removal significantly decreased soil urease activity by 16.0%-18.7% during the early and mid growing stages. The results would increase our understanding of soil carbon and nitrogen cycling process in the alpine scrub ecosystems.