四川农业大学学报 ›› 2021, Vol. 39 ›› Issue (1): 79-85.doi: 10.16036/j.issn.1000-2650.2021.01.012

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火烧迹地不同植被恢复下土壤团聚体酶活性特征

张亚1,2,3, 张文静4, 杨礼通4, 雷应雪4, 杨丽4, 蔡晓林4, 梁清1,2,3, 肖玖金1,2,3*   

  1. 1.长江上游林业生态工程四川省重点实验室,成都 611130;
    2.长江上游森林资源保育与生态安全国家林业和草原局重点实验室,成都 611130;
    3.华西雨屏区人工林生态系统研究长期科研基地,成都 611130;
    4.四川省彭州市国有林场,四川 彭州 611930
  • 收稿日期:2020-07-30 出版日期:2021-02-28 发布日期:2021-03-05
  • 作者简介:张亚,硕士研究生。*责任作者:肖玖金,副教授,主要从事森林生态学研究,E-mail:j.xiao@sicau.edu.cn。
  • 基金资助:
    四川省科技计划资助(2019YJ0427,2019YJ0416); 国家自然科学基金青年科学基金资助项目(31400457); 四川省景观与游憩研究中心资助项目(JGYQ2018032)

Characteristics of Soil Aggregate Enzyme Activity in Different Vegetation Restoration in Burned Areas

ZHANG Ya1,2,3, ZHANG Wenjing4, YANG Litong4, LEI Yingyue4, YANG Li4, CAI Xiaolin4, LIANG Qing1,2,3, XIAO Jiujin1,2,3*   

  1. 1. Sichuan Provincial Key Laboratory of Forestry Ecological Engineering in the Upper Reaches of the Yangtze River, Chengdu 611130,China;
    2. Key Laboratory of State Forestry and Grassland Bureau for Forest Resources Conservation and Ecological Security in the Upper Reaches of the Yangtze River,Chengdu 611130,China;
    3. Long-term Scientific Research Base for Plantation Ecosystem Research in Yuping District,West China,Chengdu 611130,China;
    4. Pengzhou State-owned Forest Farm,Pengzhou 611930,Sichuan,China
  • Received:2020-07-30 Online:2021-02-28 Published:2021-03-05

摘要: 【目的】了解炼山后火烧迹地中不同植被恢复模式下土壤团聚体酶活性特征。【方法】以宜宾市来复镇8 a生油樟(Cinnamomum longepaniculatum)、檫木(Sassafras tzumu)、香椿(Toona sinensis)、桢楠(Phoebe zhennan)人工纯林以及混交林(油樟、檫木、香椿以1∶1∶1均匀配置)等5种恢复模式为对象,研究了土壤团聚体(<0.25 mm、0.25~1 mm、1~2 mm、>2 mm)蔗糖酶、过氧化氢酶以及脲酶活性特征。【结果】①土壤团聚体各粒径比例在不同植被中:>2 mm含量最高,0.25~1 mm和1~2 mm次之,<0.25 mm最低;②不同粒径团聚体中蔗糖酶活性及过氧化氢酶活性呈现出相同的变化趋势,其大小排序为:桢楠>混交林>油樟>檫木>香椿,而脲酶活性的变化趋势为:桢楠>香椿>油樟>混交林>檫木;③土壤酶活性随着粒径的增加呈先增加后减少的趋势,1~2 mm达最高,>2 mm降低,其活性主要集中在0.25~1 mm和1~2 mm两个粒径中。【结论】火烧迹地后进行植被恢复能不同程度地提高土壤酶活性,改善其土壤质量 ,各林分间的差异性不显著(P>0.05),说明土壤酶活性的改善与林木种类关系不大; 团聚体粒径大小对土壤酶活性具有一定影响。

关键词: 火烧迹地, 植被恢复, 土壤团聚体, 酶活性

Abstract: 【Objective】 To investigate the characteristics of enzyme activity in soil aggregates in different vegetation restoration in burned areas after mountain smelting.【Method】 The 8-year-old Cinnamomum longepaniculatum, Sassafras tzumu, Toona sinensis, Phoebe zhennan plantation and mixed forest (Cinnamomum longepaniculatum, Sassafras tzumu, Toona sinensis 1∶1∶1 uniform configuration) and other five recovery models were targeted,and the activity characteristics of invertase,catalase and urease of different aggregate sizes in soil were studied.【Result】The research results show that: ①The change law of the particle size ratio of soil aggregates in different vegetations is: >2 mm content is the highest,between 40% and 50%,followed by 0.25-1 mm and 1-2 mm,the content is 10%-40%,<0.25 mm,the content changes between 1%-10%; ②The invertase activity and catalase activity in aggregates of different particle sizes showed the same changing trend,and the order of size was: Phoebe zhennan>mixed forest>Cinnamomum longepaniculatum>Sassafras tzumu>Toona sinensis (P>0.05),and the change of urease activity among forest stands The trend is: Phoebe zhennan>Toona sinensis>Cinnamomum longepaniculatum>Mixed forest>Sassafras tzumu (P>0.05); ③Soil enzyme activity increases first and then decreases with the increase of particle size.It reaches the maximum at 1-2 mm and decreases at>2 mm.Its activity is mainly concentrated in 0.25-1 mm and 1-2 mm in two particle sizes.【Conclusion】 The above results show that vegetation restoration can increase soil enzyme activity and soil quality to varying degrees,but the differences between forest stands are not significant,indicating that the improvement of enzyme activity is not related to the types of forest trees; It has a certain protective effect,but it is affected by its particle size and the type of soil enzyme.

Key words: burned areas, vegetation restoration, soil aggregates, enzyme activity

中图分类号: 

  • S714.2