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[1]黄艳 李月蛟 樊利华 张子良 马志良 张林 赵春章**.粗枝云杉外生菌根介导的土壤碳氮过程对增温的响应*[J].应用与环境生物学报,2019,25(06):1-12.[doi:10.19675/j.cnki.1006-687x.2019.03019]
 HUANG Yan,LI Yuejiao,et al.Response of carbon and nitrogen processes to warming as mediated by ectomycorrhizae of Picea asperata *[J].Chinese Journal of Applied & Environmental Biology,2019,25(06):1-12.[doi:10.19675/j.cnki.1006-687x.2019.03019]
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粗枝云杉外生菌根介导的土壤碳氮过程对增温的响应*()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
25卷
期数:
2019年06期
页码:
1-12
栏目:
研究论文
出版日期:
2019-12-30

文章信息/Info

Title:
Response of carbon and nitrogen processes to warming as mediated by ectomycorrhizae of Picea asperata *
作者:
黄艳12 李月蛟1 樊利华3 张子良1 马志良4 张林5 赵春章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
3四川师范大学生命科学学院 成都 610101
4西华师范大学生命科学学院 南充 637009
5中国科学院青藏高原环境变化与地表过程重点实验室 北京 100085
Author(s):
HUANG Yan1 2 LI Yuejiao1 FAN Lihua3 ZHANG Ziliang1 2 MA Zhiliang4 ZHANG Lin5 & ZHAO Chunzhang1**
1CAS Key Laboratory Ecological Restoration and Bioresource Utilization & Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
2University of Chinese Academy of Sciences, Beijing 100049, China
3College of Life Sciences, Sichuan Normal University, Chengdu 610101, China
4College of Science, China West Normal University, Nanchong 637009, China
5Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Chinese Academy of Sciences, Beijing 100085, China
关键词:
外生菌根外延菌丝增温土壤酶活性土壤碳氮过程
Keywords:
ectomycorrhiza hyphae warming soil enzyme activity soil carbon and nitrogen process
DOI:
10.19675/j.cnki.1006-687x.2019.03019
摘要:
开展川西亚高山建群种云杉(Picea asperata)外生菌根及外延菌丝土壤碳(C)和氮(N)过程对增温响应的研究,对于未来气候变化背景下区分及估算菌根与外延菌丝对亚高山针叶林生态系统C、N循环过程的影响具有重要意义。采用红外辐射加热器模拟气候变暖,同时采用不同孔径生长管区分根系(菌根)(R管)、外延菌丝(H管)和无根无菌丝土壤(C管),研究3种土壤理化性质、土壤有机碳(SOC)、微生物量及土壤C、N转化过程关键土壤酶活性对增温的响应。结果表明,增温显著降低了3种生长管土壤含水量、硝态氮(NO3--N)与铵态氮(NH4+-N)的含量(P < 0.05),显著提高了β-D-葡萄糖苷酶(BG)(C管除外)及N-乙酰葡萄糖苷酶(NAG)的活性(P < 0.05),而对土壤pH、土壤有机碳、微生物量碳(MBC)、外生菌根真菌(ECMf)生物量均无显著影响(P > 0.05)。无论增温与否,SOC含量与BG、NAG酶活性在R管与H管中均无显著差异,但R管与H管中土壤NO3--N、NH4+-N、SOC含量,ECMf生物量及BG、NAG酶活性均显著高于C管。此外,增温后H管土壤NO3--N、NH4+-N含量及ECMf生物量,分别由R管的66%、82.1%及74.1%,上升为95.4%、98.2%以及94.2%,二者之间的差异明显缩小。结果说明,外生菌根作为川西亚高山针叶林主要建群种云杉根系的重要组成部分,其外延菌丝对土壤C、N过程,尤其是土壤C库及关键酶活性,具有几乎与根同等重要影响,而未来气候变暖背景下外延菌丝的作用将更为明显。
Abstract:
It is important to estimate the respective influence of ectomycorrhiza and external hyphae of Picea asperata on the C and N cycling in subalpine coniferous forest ecosystems under future warming. In this study, infrared heaters were used to simulate warming, and growth tubes with different diameter pores were employed to separate soil for R soil (fine roots), H soil (external hyphae) and C soil (without root and hyphae) in the plots planted with P. asperata. Effects of warming on the physicochemical properties, soil organic carbon (SOC), microbial biomass, microbial biomass and soil enzyme activities in the three ingrowth core soils were determined. The results showed that warming significantly reduced the content of soil moisture content, NO3--N and NH4+-N content (P < 0.05), significantly increased β-D-glucosidase (BG) and N-acetylglucosidase (NAG) activities (P < 0.05), and had no significant effects on the pH, SOC, and ectomycorrhizal fungal (ECMf) biomass (P > 0.05). On the other hand, whether warming or not, there is no significant difference of SOC content, BG and NAG activities between R and H soil. However, the contents of NO3--N, NH4+-N and SOC, ECMf biomass, and the activities of BG and NAG were much higher in R and H soil than those in C soil. Additionally, NO3--N and NH4+-N contents, as well as ECMf biomass of H soil were about 66%, 82.1% and 74.1% of these of R soil in unwarmed plots, respectively, however, these parameter were up to 95.4%, 98.2%, 94.2% in warmed plot, so the disparity of these parameters between H and R soil were obviously reduced by warming. The results indicated that external hyphae as an important component of P. asperata root systems possibly has equivalent effects to roots on soil C and N processes, especially on SOC and the key soil enzyme activities, and these effects of hyphae would be further amplified by future climate warming.

相似文献/References:

[1]李强,李树红,李小林,等.野生翘鳞肉齿菌子实体内生菌多样性[J].应用与环境生物学报,2015,21(04):629.[doi:10.3724/SP.J.1145.2015.02004]
 LI Qiang,LI Shuhong,LI Xiaolin,et al.Diversity of endophytic microorganisms in fresh fruiting bodies of Sarcodon imbricatus[J].Chinese Journal of Applied & Environmental Biology,2015,21(06):629.[doi:10.3724/SP.J.1145.2015.02004]

备注/Memo

备注/Memo:
收稿日期 Received: 2019-03-11 接受日期 Accepted: 2019-05-09
*国家自然科学基金项目(31570477)、中国科学院青藏高原环境变化与地表过程重点实验室开放基金(TEL201701)和中国科学院山地生态恢复与生物资源利用重点实验室开放课题(kxysws1602)资助
**通讯作者 Corresponding author (E-mail: zhaochzh04@126.com)
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更新日期/Last Update: 2019-05-09