Charcoal and smoke extract stimulate the soil microbial community in a highly weathered xanthic Ferralsol

被引：217

作者：

Steiner, Christoph ^{[1
]}

Das, Keshav C. ^{[2
]}

Garcia, Marcos ^{[3
]}

Foerster, Bernhard ^{[4
]}

Zech, Wolfgang ^{[1
]}

机构：

[1] Univ Bayreuth, Inst Soil Sci & Soil Geog, D-95440 Bayreuth, Germany

[2] Univ Georgia, Fac Engn, Biorefining & Carbon Cycling Program, Athens, GA 30606 USA

[3] Embrapa Amazonia Ocident, Manaus, Amazonas, Brazil

[4] ECT Oekotoxiko GmbH, D-65439 Florsheim am Main, Germany

来源：

PEDOBIOLOGIA | 2008年 / 51卷 / 5-6期

关键词：

bio-oil; Brazil; microbial activity; slash and char; terra preta; wood vinegar;

D O I：

10.1016/j.pedobi.2007.08.002

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

The influence of charcoal and smoke condensates (pyroligneous acid, PA) on microbial activity in a highly weathered Amazonian upland soil was assessed via measurements of basal respiration (BR), substrate-induced respiration (SIR), and exponential population increase after substrate addition. PA extracts are commonly used for fertilizer or as pest control in Brazil., where phosphorus (P) availability and nitrogen (N) leaching are among the most severe limitations for agriculture. Microbes play an important role in nutrient cycling and solubilizing of phosphate. BR, microbial biomass, population growth and the microbe's efficiency (expressed by the metabolic quotient) increased linearly and significantly with increasing charcoal concentrations (50, 100 and 150 g kg(-1) soil). Application of PA caused a sharp increase in all parameters. We suppose that the condensates from smoke contain easily degradable substances and only small amounts of inhibitory agents, which could be utilized by the microbes for their metabolism. (C) 2007 Etsevier GmbH. All rights reserved.

引用

页码：359 / 366

页数：8

共 36 条

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