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Effects of root pruning on the physicochemical properties and microbial activities of poplar rhizosphere soil
- Source :
- PLoS ONE, PLoS ONE, Vol 12, Iss 11, p e0187685 (2017)
- Publication Year :
- 2017
- Publisher :
- Public Library of Science (PLoS), 2017.
-
Abstract
- This study aimed to determine the effects of root pruning on the physicochemical characteristics and microbial activities of poplar rhizosphere soil. The root systems of 5-year-old poplar (Populus×euramericana cv. 'Neva') trees were manually pruned at 6, 8, or 10 times diameter at breast height (DBH) from the trunk (severe, moderate, and light, respectively) along both inter-row sides. Moderate root pruning significantly increased the concentrations of amino acids, organic acids, and total sugars in the root exudates and decreased the pH of rhizosphere soil. This treatment also increased the contents of available nitrogen, phosphorus, potassium, and total organic carbon as well as high-, medium-, and low-activity organic carbon in rhizosphere soil. Moreover, moderate pruning increased the contents of microbial biomass carbon and nitrogen, and enhanced basal respiration, in addition to decreasing the metabolic quotients in rhizosphere soil by 8.9%, 5.0%, and 11.4% compared with control, light, and severe root pruning treatments, respectively. Moderate pruning increased the growth rates of DBH, tree height, and volume to the highest levels. Furthermore, these indices were not significantly different between the light root pruning and control groups, but varied significantly between severe and moderate root-pruning treatments. Thus, root pruning, depending on the distance from the trunk, significantly influences the physicochemical properties and microbial activities in poplar rhizosphere soil.
- Subjects :
- 0106 biological sciences
lcsh:Medicine
Biomass
Plant Science
Root system
Soil Chemistry
Plant Roots
Physical Chemistry
01 natural sciences
Trees
Soil
lcsh:Science
Soil Microbiology
Plant Growth and Development
Rhizosphere
Multidisciplinary
Ecology
Physics
Eukaryota
Soil chemistry
Agriculture
Phosphorus
04 agricultural and veterinary sciences
Plants
Chemistry
Populus
Root Growth
Physicochemical Properties
Organic Acids
Poplars
Physical Sciences
Pruning
Soil microbiology
Research Article
Ecological Metrics
Nitrogen
Biomass (Ecology)
Soil Science
chemistry.chemical_element
Plant-Environment Interactions
Environmental Chemistry
Plant Ecology
lcsh:R
Ecology and Environmental Sciences
fungi
Organisms
Chemical Compounds
Diameter at breast height
Biology and Life Sciences
Physical Properties
Chemical Properties
nervous system
Agronomy
chemistry
Potassium
040103 agronomy & agriculture
0401 agriculture, forestry, and fisheries
lcsh:Q
Acids
Developmental Biology
010606 plant biology & botany
Subjects
Details
- ISSN :
- 19326203
- Volume :
- 12
- Database :
- OpenAIRE
- Journal :
- PLOS ONE
- Accession number :
- edsair.doi.dedup.....f752d204592e6000e208ea35ab34bebd