Journal
BIOLOGY AND FERTILITY OF SOILS
Volume 48, Issue 2, Pages 205-216Publisher
SPRINGER
DOI: 10.1007/s00374-011-0620-y
Keywords
Composting; Heat drying; Municipal solid waste; Sewage sludge; Soil microbial size and activity; Thermal drying
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Funding
- Spanish Ministry of Science and Innovation [AGL2009-09124]
- Spanish Research Council (CSIC)
- Banco Santander Central Hispano
- CSIC JAE-Doc
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The objectives of this work were to (a) investigate the short-term effects of applications of mineral fertilizer, municipal solid waste (MSW) compost, and two sewage sludges (SSs) subjected to different treatments (composting and thermal drying) on microbial biomass and activity of soil by measuring microbial biomass C, adenosine 5'-triphosphate content, basal respiration, and dehydrogenase, catalase, urease, phosphatase, beta-glucosidase, and N-alpha-benzoyl-L-argininamide-hydrolyzing activities and (b) explore the relationships between soil microbiological, biochemical, and chemical properties and wheat yields under semiarid field conditions by principal component analysis. The additions of MSW compost, SS compost, and thermally dried SS did not affect significantly soil microbial biomass, as compared to mineral fertilization and no amendment. However, microbial activity increased in organically amended soils, probably due to the stimulating effect of the added decomposing organic matter. Changes in soil microbiological and biochemical properties showed no significant relationships with wheat yields, probably because plant growth was primarily water-limited, as typically occurs in semiarid regions.
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