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Warming and nitrogen deposition accelerate soil phosphorus cycling in a temperate meadow ecosystem
- Source :
- Soil Research. February, 2020, Vol. 58 Issue 1, p109, 7 p.
- Publication Year :
- 2020
-
Abstract
- Phosphorus (P) is an essential element for living organisms and a major limiting factor in many ecosystems. In recent years, global warming and nitrogen (N) deposition have become increasingly serious, with significant effects on the P cycle in terrestrial ecosystems. A series of studies were carried out on the soil P cycle, but how climate change affects this remains unclear. Field experiments with warming and N addition were implemented since April 2007. Infrared radiators manipulated temperature, and aqueous ammonium nitrate (10 g [m.sup.-2] [year.sup.-1]) was added to simulate N deposition. Compared with the control, N addition reduced soil total P; warming and N addition decreased soil available P; warming, N addition and warming plus N addition decreased microbial biomass P, but increased litter P; and warming and N addition increased phosphatase activity significantly. Correlation analysis showed that soil total P, available P, microbial biomass P and phosphatase activity were positively correlated with soil temperature and water content. Soil total P was positively correlated with microbial biomass P and phosphatase activity; and available P was positively correlated with microbial biomass P but negatively correlated with litter P. The results showed that warming and N deposition accelerated the soil P cycle by changing soil physical and chemical properties and soil biological activities (microbial and phosphatase activities). However, N addition reduced the capacity of microbes to fix P and reduced microbial biomass P, resulting in losses to the soil P pool, further aggravating P limitation in the Songnen Grassland ecosystem. Additional keywords: global warming, nitrogen addition, P cycle. Received 9 May 2019, accepted 7 September 2019, published online 28 October 2019<br />Introduction Over the last 60 years, terrestrial ecosystems have been influenced by significant human-induced environmental changes, including increases in nitrogen (N) deposition and average global temperatures (IPCC 2014). Global change [...]
- Subjects :
- Ammonium salts -- Chemical properties -- Analysis
Global warming -- Chemical properties -- Analysis
Soil phosphorus -- Chemical properties -- Analysis
Terrestrial ecosystems -- Chemical properties -- Analysis
Phosphatases -- Chemical properties -- Analysis
Soil microbiology -- Chemical properties -- Analysis
Ecosystems
Global temperature changes
Ammonium nitrate
Microorganisms
Climate change
Agricultural industry
Earth sciences
Subjects
Details
- Language :
- English
- ISSN :
- 1838675X
- Volume :
- 58
- Issue :
- 1
- Database :
- Gale General OneFile
- Journal :
- Soil Research
- Publication Type :
- Academic Journal
- Accession number :
- edsgcl.614152055
- Full Text :
- https://doi.org/10.1071/SR19114