Carbon flow into microbial and fungal biomass as a basis for the belowground food web of agroecosystems

被引：95

作者：

Kramer, Susanne ^{[1
]}

Marhan, Sven ^{[1
]}

Ruess, Liliane ^{[2
]}

Armbruster, Wolfgang ^{[3
]}

Butenschoen, Olaf ^{[4
]}

Haslwimmer, Heike ^{[1
]}

Kuzyakov, Yakov ^{[5
]}

Pausch, Johanna ^{[6
]}

Scheunemann, Nicole ^{[4
]}

Schoene, Jochen ^{[7
]}

Schmalwasser, Andreas ^{[8
]}

Totsche, Kai Uwe ^{[8
]}

Walker, Frank ^{[7
]}

Scheu, Stefan ^{[4
]}

Kandeler, Ellen ^{[1
]}

机构：

[1] Univ Hohenheim, Soil Biol Sect, Inst Soil Sci & Land Evaluat, D-70599 Stuttgart, Germany

[2] Humboldt Univ, Ecol Sect, Inst Biol, D-10115 Berlin, Germany

[3] Univ Hohenheim, Food & Analyt Chem Sect, Inst Food Chem, D-70599 Stuttgart, Germany

[4] Univ Gottingen, JF Blumenbach Inst Zool & Anthropol, D-37073 Gottingen, Germany

[5] Univ Gottingen, Dept Soil Sci Temperate Ecosyst, D-37077 Gottingen, Germany

[6] Univ Bayreuth, Dept Agroecosyst Res, D-95444 Bayreuth, Germany

[7] Univ Hohenheim, Inst Phytomed, D-70599 Stuttgart, Germany

[8] Univ Jena, Hydrogeol Sect, Inst Geosci, D-07749 Jena, Germany

来源：

PEDOBIOLOGIA | 2012年 / 55卷 / 02期

关键词：

Carbon cycle; Stable isotopes; Soil microorganisms; Fungi; C-13-ergosterol; Belowground food web; SOIL ORGANIC-CARBON; PHOTOSYNTHESIS CONTROLS; EXTRACTION METHOD; LITTER CARBON; FATTY-ACIDS; MAIZE; MATTER; RHIZOSPHERE; MECHANISMS; TURNOVER;

D O I：

10.1016/j.pedobi.2011.12.001

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

The origin and quantity of plant inputs to soil are primary factors controlling the size and structure of the soil microbial community. The present study aimed to elucidate and quantify the carbon (C) flow from both root and shoot litter residues into soil organic, extractable, microbial and fungal C pools. Using the shift in C stable isotope values associated with replacing C3 by C4 plants we followed root- vs. shoot litter-derived C resources into different soil C pools. We established the following treatments: Corn Maize (CM), Fodder Maize (FM), Wheat + maize Litter (WL) and Wheat (W) as reference. The Corn Maize treatment provided root- as well as shoot litter-derived C (without corn cobs) whereas Fodder Maize (FM) provided only root-derived C (aboveground shoot material was removed). Maize shoot litter was applied on the Wheat + maize Litter (WL) plots to trace the incorporation of C4 litter C into soil microorganisms. Soil samples were taken three times per year (summer, autumn, winter) over two growing seasons. Maize-derived C signal was detectable after three to six months in the following pools: soil organic C (C-org), extractable organic C (EOC), microbial biomass (C-mic) and fungal biomass (ergosterol). In spite of the lower amounts of root- than of shoot litter-derived C inputs, similar amounts were incorporated into each of the C pools in the FM and WL treatments, indicating greater importance of the root- than shoot litter-derived resources for the soil microorganisms as a basis for the belowground food web. In the CM plots twice as much maize-derived C was incorporated into the pools. After two years, maize-derived C in the CM treatment contributed 14.1, 24.7, 46.6 and 76.2% to C-org, EOC, C-mic and ergosterol pools, respectively. Fungi incorporated maize-derived C to a greater extent than did total soil microbial biomass. (c) 2011 Elsevier GmbH. All rights reserved.

引用

页码：111 / 119

页数：9

共 73 条

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