放牧和补播对草地土壤有机碳和微生物量碳的影响

赵娜; 庄洋; 赵吉

doi:10.11829/j.issn.1001-0629.2013-0181

放牧和补播对草地土壤有机碳和微生物量碳的影响

赵娜¹,
庄洋¹,
赵吉^2,3,4,5

1.
内蒙古大学环境与资源学院, 内蒙古呼和浩特 010021
2.
1. 内蒙古大学环境与资源学院, 内蒙古呼和浩特 010021
3.
2. 中美生态能源及可持续性科学内蒙古研究中心, 内蒙古呼和浩特 010021
4.
3. 内蒙古低碳发展研究院, 内蒙古呼和浩特 010010
5.

基金项目:

国家自然科学基金(31160129)

德国国际合作机构(GIZ)绿色金融项目(83086091)

摘要: 为评估草地的碳源/汇功能, 探索可持续发展的草地管理措施, 以内蒙古锡林郭勒典型草原为研究区域, 采用野外调查取样结合室内分析的方法, 分析了土壤有机碳(Soil Organic Carbon, SOC)和土壤微生物量碳(Soil Microbial Biomass Carbon, SMBC)的变化规律, 探讨了围栏封育29年(WF29)、围栏封育8年(WF8)、补播苜蓿(Medicago sativa)(RA)、补播羊草(Leymus chinensis)(RC)、以及轻度放牧(LG)、中度放牧(MG)和重度放牧(HG)共7种处理对SOC和SMBC分布的影响以及草地SOC和SMBC碳库储量的大小。结果表明, 从土壤剖面来看, SOC、SMBC含量在土壤表层较高, 为草地的主要碳库, 随着土壤深度的增加呈现降低的趋势。土壤根系层(0－30 cm)中, WF8、WF29、RA、RC、LG和MG的SOC和SMBC均高于HG, 其中WF8正效应较为明显, 有利于提高SMBC与SOC含量。SOC与SMBC呈显著正相关关系(P0.05)。可以通过SMBC的变化反映SOC的变化, 进而反映SOC碳库的变化。经估算, 锡林浩特市草地0－30 cm总的SOC和SMBC碳储量分别为788.86和9.48 Gg。其中, 围封8年的SOC和SMBC碳储量的值都为最高, 分别为661.76和6.76 Gg, 人工种草措施的值均为最低, 分别为0.61 Gg和5.73 t。SOC和SMBC含量对于土壤肥力和土壤品质变化有指示作用, 可作为草地碳汇的重要评估指标。

关键词:

English

Effects of grassland managements on soil organic carbon and microbial biomass carbon

Na ZHAO¹,
Yang ZHUANG¹,
Ji ZHAO^2,3,4,5

1.
College of Environment and Resources, Inner Mongolia University, Hohhot 010021, China
2.
1. College of Environment and Resources, Inner Mongolia University, Hohhot 010021, China
3.
2. Sino-US Center for Conservation, Energy and Sustainability Science, Inner Mongolia, Hohhot 010021, China
4.
3. Inner Mongolia Low-Carbon Research Institute, Hohhot 010010, China
5.

Received Date: 2013-04-06
Publish Date: 2014-03-14

Abstract: In order to evaluate the carbon source/carbon sink function of grassland and explore the sustainable grassland management measures, the combined methods of field sampling and laboratory analysis were employed to analyze the variation of soil organic carbon (SOC) and soil microbial biomass carbon (SMBC) in Xilingol typical grassland in Inner Mongolia. The effects of different management and grazing measures on the distribution and carbon reserves of SOC and SMBC were discussed. The studied measures included fenced enclosure for 29 years (WF29), fenced enclosure for 8 years (WF8), filling-up Medicago sativa (RA), filling-up Leymus chinensis (RC), and three grazing measures . The surface soil layer was higher carbon pool because the SOC and SMBC in the soil profile decreased with soil depth increasing. The SOC and SMBC of WF8 and WF29 were higher than that of HG in root system soil layer (0-30 cm). There were significantly positive effects of WF8 management on SMBC and SOC. There was significantly positive correlation (P0.05) between SOC and SMBC. The variations of SMBC not only reflect the changes of SOC, but aslo reflect the changes of soil organic carbon pool. The total SOC and SMBC carbon reserves were 788.84 Gg C and 9.47 Gg C in Xilinhot, respectively. The SOC and SMBC carbon reserves were highest under fenced enclosure for 8 years (661.76 Gg C, 6.76 Gg C), and lowest under the artificial filling-up measures (0.61 Gg C, 5.73 t C). SOC and SMBC were the indicators of soil fertility and soil quality and important evaluation index of grassland carbon sink.

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参考文献(1)

[1]

Hargreaves P R, Brookes P C, Ross G J S, Poulton P R.Evaluating soil microbial biomass carbon as an indicator of long-term environmental change[J].Soil Biology Biochemistry.2003,35(3):401-407马效国, 樊丽琴, 陆妮, 沈禹颖.不同土地利用方式对苜蓿茬地土壤微生物生物量碳、氮的影响[J].草业科学.2005,22(10):13-17马秀枝, 王艳芬, 汪诗平, 王金枝, 李长生.放牧对内蒙古锡林河流域草原土壤碳组分的影响[J].植物生态学报.2005,29(4):569-576崔楠.内蒙古抓紧筹划低碳经济积极构建碳汇大区.内蒙古日报, 2010-03-03(第7版).Lal R.Soil carbon sequestration to mitigate climate change[J].Geoderma.2004,123:1-22李博, 雍世鹏, 李瑶, 刘永江.中国的草原.北京:科学出版社, 1990:213-218.Bucher A E, Lanyon L E.Evaluating soil management with microbial community level physiological profiles[J].Applied Soil Ecology.2005,29(1):59-71李振高, 骆永明, 滕应.土壤与环境微生物研究法.北京:科学出版社, 2008:322-325.王长庭, 龙瑞军, 王启兰, 景增春, 施建军, 杜岩功, 曹广民.三江源区高寒草甸不同退化演替阶段土壤有机碳和微生物量碳的变化[J].应用与环境生物学报.2008,14(2):225-230Lal R.Soil carbon sequestration impacts on global climate change and food security[J].Science.2004,304(5677):1623-1627韩天虎, 赵忠, 王安禄, 冯今.青藏高原东缘异针茅草地群落组成及生产力研究[J].草业学报.2007,16(6):62-66陈全功.江河源区草地退化与生态环境的综合治理[J].草业学报.2007,16(1):10-15Conant R, Faustian K, Elliott E.Grassland management and conversion into grassland:Effects on soil carbon[J].Ecological Applications.2001,11(2):343-355Wang S, Wilkes A, Zhang Z, Chang X, Lang R, Wang Y, Niu H.Management and land use change effects on soil carbon in northern China’s grasslands:A synthesis[J].Agriculture, Ecosystems Environment.2011,142(3):329-340Wang J K, Solomon D, Lehmann J, Zhang X, Amelung W.Soil organic sulfur forms and dynamics in the Great Plains of North America as influenced by long-term cultivation and climate[J].Geoderma.2006,133(3):160-172Liebig M A, Gross J R., Kronberg S L, Hanson J D, Frank A B, Phillips R L[J].Soil response to long-term grazing in the northern Great Plains of North America.Agriculture, Ecosystems Environment.2006,115(1):270-276Li C, Hao X, Zhao M, Han G, Willms W D.Influence of historic sheep grazing on vegetation and soil properties of a desert steppe in Inner Mongolia[J].Agriculture, Ecosystems Environment.2008,128(1):109-116Han G D, Hao X Y, Zhao M, Wang M, Ellert B H, Willms W, Wang M.Effect of grazing intensity on carbon and nitrogen in soil and vegetation in a meadow steppe in Inner Mongolia[J].Agriculture, Ecosystems and Environment.2008,125(1):21-32Bai Y, Han X, Wu J, Chen Z, Li L.Ecosystem stability and compensatory effects in the Inner Mongolia grassland[J].Nature.2004,431(7005):181-184McCuley R L, Burke I C, Nelson J A, Lauenroth W K, Knapp A K, Kelly E P.Regional patterns in carbon cycling across the Great Plains of North America[J].Ecosystems.2005,8(1):106-121

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放牧和补播对草地土壤有机碳和微生物量碳的影响

English

Effects of grassland managements on soil organic carbon and microbial biomass carbon

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