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Time-series analysis of phosphorus-depleted microbial communities in carbon/nitrogen-amended soils
- Source :
- Applied Soil Ecology. 145:103346
- Publication Year :
- 2020
- Publisher :
- Elsevier BV, 2020.
-
Abstract
- The mineralization of organic phosphorus (P) in soil is mainly driven by extracellular phosphatases secreted by soil microbes. Previous studies have suggested that microbial phosphatase production is regulated by soil nutrient stoichiometry and, thus, promoted by carbon and nitrogen (CN) amendment. However, the mechanism leading to increased phosphatase activity after nutrient amendment to soil is unclear, and it is not known how long the effect of the nutrient amendment lasts. To address these questions, we performed a 24-day time-series analysis of full-factorial soil microcosms with CN amendment. Phosphatase activity as well as that expressed per unit of β- d -glucosidase activity, increased sharply and significantly in response to the CN amendment. This suggests that the microbial community shifted their resource allocation after the nutrient amendment and preferentially produced phosphatases rather than β- d -glucosidase. This shifted resource allocation pattern was maintained throughout the 24-day incubation period, and copiotrophic microbes dominated soils that received CN amendment. These results indicate that the effect of the CN amendment on soil microbial resource allocation lasted for >24 days. Together, our results highlight the importance of high-resolution time-series observations that complement long-term studies for which frequent observation is often difficult.
- Subjects :
- 0106 biological sciences
Ecology
Phosphatase
Amendment
Soil Science
chemistry.chemical_element
04 agricultural and veterinary sciences
Mineralization (soil science)
complex mixtures
01 natural sciences
Agricultural and Biological Sciences (miscellaneous)
Nitrogen
Nutrient
chemistry
Microbial population biology
Environmental chemistry
Soil water
040103 agronomy & agriculture
0401 agriculture, forestry, and fisheries
Microcosm
010606 plant biology & botany
Subjects
Details
- ISSN :
- 09291393
- Volume :
- 145
- Database :
- OpenAIRE
- Journal :
- Applied Soil Ecology
- Accession number :
- edsair.doi...........432ae66c574c2445491ebe9777e6065c