Relationships between soil pH and microbial properties in a UK arable soil

Pietri, J.C. Aciego; Brookes, P. C.

doi:10.1016/j.soilbio.2008.03.020

Cited by 434 publications

(141 citation statements)

References 53 publications

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“…Between permanent pastures, soil pH in HGP was greater than MGP at both depths, the result of which was likely caused by a plant community-induced shift that contributed to higher concentrations of basic cations (e.g., exchangeable Ca þ2 and Mg þ2 ) in the former . Soil pH outcomes contributed to lower microbial biomass C at 0-5 cm in CWP compared to the permanent pastures; a finding consistent in other ecosystems where soil acidification decreased microbial biomass and narrowed the spectrum of adaptable microbial species (Kowalenko et al 1978;Aciego Pietri et al 2008;Rousk et al 2010).…”

Section: Discussionsupporting

confidence: 76%

Grazing Management, Season, and Drought Contributions to Near-Surface Soil Property Dynamics in Semiarid Rangeland

Liebig

Kronberg

Hendrickson

et al. 2014

Rangeland Ecology & Management

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Grazing management effects on soil property dynamics are poorly understood. A study was conducted to assess effects of grazing management and season on soil property dynamics and greenhouse gas flux within semiarid rangeland. Grazing management treatments evaluated in the study included two permanent pastures differing in stocking rate (moderately and heavily grazed pastures) and a fertilized, heavily grazed crested wheatgrass (Agropyron desertorum [Fisch. ex. Link] Schult.) pasture near Mandan, North Dakota. Over a period of 3 yr, soil properties were measured in the spring, summer, and fall at 0-5 cm and 5-10 cm. Concurrent to soil-based measurements, fluxes of carbon dioxide, methane, and nitrous oxide were measured on 1-wk to 2-wk intervals and related to soil properties via stepwise regression. High stocking rate and fertilizer nitrogen (N) application within the crested wheatgrass pasture contributed to increased soil bulk density and extractable N, and decreased soil pH and microbial biomass compared to permanent pastures. Soil nitrate nitrogen tended to be greatest at peak aboveground biomass, whereas soil ammonium nitrogen was greatest in early spring. Drought conditions during the third year of the study contributed to nearly two-fold increases in extractable N under the crested wheatgrass pasture and the heavily grazed permanent pasture, but not the moderately grazed permanent pasture. Stepwise regression found select soil properties to be modestly related to soil-atmosphere greenhouse gas fluxes, with model r 2 ranging from 0.09 to 0.76. Electrical conductivity was included most frequently in stepwise regressions and, accordingly, may serve as a useful screening indicator for greenhouse gas ''hot spots'' in grazing land.

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Section: Discussionsupporting

confidence: 76%

Grazing Management, Season, and Drought Contributions to Near-Surface Soil Property Dynamics in Semiarid Rangeland

Liebig

Kronberg

Hendrickson

et al. 2014

Rangeland Ecology & Management

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“…Further regression analysis showed that FPM pH was significantly correlated with other environmental variables (except for TN), especially DOC (R 2 ϭ 0.9296) (see Fig. S2a in the supplemental material), indicating that, as with soil (27), pH can be used as an integrated parameter reflecting the overall physicochemical information of the FPM ecosystem.…”

Section: Biogeochemical Attributesmentioning

confidence: 98%

Illuminating Anaerobic Microbial Community and Cooccurrence Patterns across a Quality Gradient in Chinese Liquor Fermentation Pit Muds

Ren

et al. 2016

Appl Environ Microbiol

146

139

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Fermentation pit mud, an important reservoir of diverse anaerobic microorganisms, is essential for Chinese strong-aroma liquor production. Pit mud quality, according to its sensory characteristics, can be divided into three grades: degraded, normal, and high quality. However, the relationship between pit mud microbial community and pit mud quality is poorly understood, as are microbial associations within the pit mud ecosystem. Here, microbial communities at these grades were compared using Illumina MiSeq sequencing of the variable region V4 of the 16S rRNA gene. Our results revealed that the pit mud microbial community was correlated with its quality and environmental factors. Species richness, biodiversity, and relative and/or absolute abundances of Clostridia, Clostridium kluyveri, Bacteroidia, and Methanobacteria significantly increased, with corresponding increases in levels of pH, NH 4 ؉ , and available phosphorus, from degraded to high-quality pit muds, while levels of Lactobacillus, dissolved organic carbon, and lactate significantly decreased, with normal samples in between. Furthermore, 271 pairs of significant and robust correlations (cooccurrence and negative) were identified from 76 genera using network analysis. Thirteen hubs of cooccurrence patterns, mainly under the Clostridia, Bacteroidia, Methanobacteria, and Methanomicrobia, may play important roles in pit mud ecosystem stability, which may be destroyed with rapidly increased levels of lactic acid bacteria (Lactobacillus, Pediococcus, and Streptococcus). This study may help clarify the relationships among microbial community, environmental conditions, and pit mud quality, allow the improvement of pit mud quality by using bioaugmentation and controlling environmental factors, and shed more light on the ecological rules guiding community assembly in pit mud. Chinese strong-aroma liquor (CSAL), a traditional alcoholic beverage, accounts for Ͼ70% of both national liquor industry production (12 billion liters) and sales volume ($80 billion) (1, 2). Its production is a typical recycling process using solid-state fermentation. In brief, fermented grains obtained from the last fermentation round are mixed with crushed raw materials (sorghum, wheat, corn, rice, and sticky rice) for distillation to give CSAL (3). After cooling, the steamed mixture is supplied with a 10 to 20% (wt/wt) Daqu starter. Next, the above-mentioned mixture is placed into a fermentation vessel (underground cuboid soil pit, 2 m wide by 3 m long by 2 m deep), sealed, and anaerobically fermented for about 60 days at 28 to 32°C (2). The inside walls of the pit are covered with fermentation pit mud (FPM), which is prepared initially by incubating the mixture of clay, spent grain, bean cake powder, and fermentation bacteria (e.g., Clostridium spp.) (2). After fermentation, the fermented grains taken out of the pit are distilled to give liquor after new raw materials are supplied, and then the mixture is applied to the next round of fermentation, as described above. It is widely believe...

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“…Possible explanations for change in level of soil microbial biomass with amendment of biochar could be due to increase in available soil nutrients, adsorption of toxic compounds, improved soil water status and favorable soil pH condition, all of these factors have positive effects on soil microbial activity (Lehmann et al, 2011). Increases in soil microbial biomass have been reported with increasing soil pH from pH 3.7 to 8.3 under similar environmental conditions (Aciego-Pietry and Brookes, 2008). Thus, the pH of biochars have considerable influence on total microbial abundance and biomass in soil.…”

Section: Introductionmentioning

confidence: 96%