期刊
BIOLOGY AND FERTILITY OF SOILS
卷 51, 期 6, 页码 649-659出版社
SPRINGER
DOI: 10.1007/s00374-015-1010-7
关键词
Biochar; Phosphorus; Bacteria; Fungi; qPCR; T-RFLP
类别
资金
- NSERC
- University of Toronto
- Haliburton Forest and Wildlife Reserve
- Office Of Internatl Science &Engineering
- Office Of The Director [1243444] Funding Source: National Science Foundation
Soil microbial biomass, activity, and community composition were studied 1 and 2 years after biochar, phosphorus (P), and biochar + P additions to the soil of a north temperate, mixed-deciduous, P-limited forest in Central Ontario, Canada. Biochar was pyrolyzed on site from sugar maple and white spruce sawdust at ca. 400 A degrees C, and P was added as triple superphosphate. Biochar additions of 5 t ha(-1) (approximately 0.4 to 1 kg P ha(-1)) had minor effects on bacterial and fungal community composition, fungi/bacteria ratios, microbial biomass, and microbial C mineralization, with significant changes only being detected in the organic layer for additions of maple biochar. In contrast, additions of 200 kg P ha(-1) did alter soil chemical properties and reduced both microbial biomass and fungi/bacteria ratios. We conclude that biochar addition at 5 t ha(-1) is neither beneficial nor toxic to the soil microbes in a northern hardwood forest on acidic soils, suggesting that biochar amendments can be used to sequester C without adversely affecting the soil microbial community.
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