Soil texture affects soil microbial and structural recovery during grassland restoration

Bach, Elizabeth M.; Baer, Sara G.; Meyer, Clinton K.; Six, Johan

doi:10.1016/j.soilbio.2010.08.014

Cited by 252 publications

(117 citation statements)

References 50 publications

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“…3b) correlated with the relative abundances of the dominant bacterial phyla (class) including the Acidobacteria, Firmicutes, Actinobacteria, Chloroflexi, and Alphaproteobacteria. These results partially support the notion that soil texture is the strongest factor in structuring bacterial communities (Bach et al 2010;Carson et al 2010). Our study suggests that the soil texture fraction is the principal factor that plays an important role in determining soil nutrient status and moisture (Davinic et al 2012;Li et al 2014) and contributes to the differences in soil bacterial composition between conservation (chisel plow and zero tillage) and convention (plow) tillage.…”

Section: Effects Of Different Tillage Protocols On Soil Bacterial Taxsupporting

confidence: 85%

Conservation tillage increases soil bacterial diversity in the dryland of northern China

Wang

Lü

Chen

et al. 2016

Agron. Sustain. Dev.

123

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Agricultural practices change soil's physical and chemical properties, therefore modifying soil microbial communities. Conservation tillage is widely used to improve the soil texture and nutrient status in the dryland regions of northern China. However, little is known about the influence of soil properties on microbes, in particular on the effect of conservation tillage on soil bacterial communities. Here, we studied the effect of a 5-year tillage treatment on soil properties and soil bacterial communities in the dryland regions of northern China using a high-throughput sequencing technology and quantitative PCR of 16S rRNA genes. We compared the changes in soil bacterial diversity, and composition was measured for conservation tillage, including zero plow or chisel plow, and for conventional tillage using plow. Our results show that conservation tillage increased the Simpson index by 378 % and exhibited significantly dissimilar polygenetic diversity, with r of 1, and taxonomic diversity, of r higher than 0.49, compared to conventional tillage. This finding demonstrates that conservation tillage modifies soil bacterial diversity. Chisel plow and zero tillage increase the abundance of the genus Bacillus, including 85 % of the phylum Firmicutes, and of Rhizobiales belonging to the Alphaproteobacteria. Overall conservation tillage increased the abundance of profitable functional bacteria species.

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Section: Effects Of Different Tillage Protocols On Soil Bacterial Taxsupporting

confidence: 85%

Conservation tillage increases soil bacterial diversity in the dryland of northern China

Wang

Lü

Chen

et al. 2016

Agron. Sustain. Dev.

123

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“…Perennial cropping systems, such as those proposed for cellulosic bioenergy production, may promote plant-microbial linkages because of their extensive root networks and allocation of belowground C. The development of perennial root systems during grassland restoration represents a significant source of C inputs to soils that stimulates microbial biomass and activity and can change community composition Bach et al 2010;Baer et al 2010;Barrett and Burke 2000;Camill et al 2004;McKinley et al 2005). Carbon additions from perennial root systems may also affect microbial communities in cultivated soils.…”

Section: Introductionmentioning

confidence: 99%

Physiological shifts in the microbial community drive changes in enzyme activity in a perennial agroecosystem

Hargreaves

Hofmockel

2013

Biogeochemistry

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Perennial agroecosystems have the potential to promote plant-microbial linkages by increasing the quantity of root carbon entering the soil. However, an understanding of how perennial cropping systems affect microbial communities remains incomplete. The objective of this study was to determine the potential for a fertilized perennial bioenergy cropping system to impact microbial growth and enzyme activity. Three times throughout the growing season we examined the activity of four enzymes involved in decomposition (ß-glucosidase, ß-xylosidase, cellobiohydrolase, and N-acetyl glucosaminidase) in replicated plots of an annual (corn) and perennial-based (switchgrass) cropping system. We also took simultaneous measurements of microbial biomass and potential rates of microbial respiration and net N mineralization. Microbial biomass was unaffected by cropping system. Mid-summer, however, we observed increases in enzyme activity and potential microbial respiration in the perennial system that were independent of microbial biomass, likely in response to labile carbon inputs. Further, we observed lower net N mineralization, higher microbial biomass nitrogen and higher activity of nitrogen liberating enzymes, which are indicative of a community with high nitrogen demands. Overall, our research demonstrates that perennial agroecosystems can affect the physiological capacity of the microbial community, yielding communities with greater nitrogen retention and greater rates of decomposition as a result of allocation of resources towards enzyme production and nitrogen mining. These results can inform biogeochemical models with respect to the importance of temporally dynamic changes in carbon and nitrogen availability and microbial carbon use efficiency as drivers of enzyme production.

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“…In addition, the soil texture was among the most important abiotic determinants of soil microbial properties and it influenced microbial habitats in multiple ways (Garbeva et al, 2004;Bowles et al, 2014). Clay content can be linked to protection of soil microbes from predation, desiccation, heat and pH fluctuations; thus, microbes in clay soils are more strongly resistant to changes in external conditions (Bach et al, 2010).…”

Section: Discussionmentioning

confidence: 99%

Accumulation of Soil Available Phosphorus under Pig Manure Application Limits Microbial Community Function in Upland Soils

Zhang¹,

Li²,

Wang³

2015

IJAB

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In this study, a two-year pot experiment with a peanut (Arachis hypogaea L.) and radish (Raphanus sativus L.) rotation system was conducted to investigate changes in soil chemical properties and microbial characteristics and to determine the internal relationship of these variables after pig manure application. The selected soil types include Agri-Udic Ferrosols, Ali-Udic Argosols and Ali-Udic Cambisols, which are widely distributed throughout subtropical China. The annual pig manure application amounts were 25, 50, 100, 200, 400 and 800 kg P ha .89-0.97, P<0.01) were positively and linearly correlated with the microbial biomass carbon/nitrogen in the three soils. The relationship between the functional diversity of the microbial community and the available phosphorus was parabolic. According to the most pronounced changes (i.e., the highest values), we deduced that the rational application rate of pig manure should be 100-200 kg P ha -1 in the three soils, which was verified by a lack of significant increase in peanut pod yield when the deduced fertilizer level was exceeded. In brief, our results indicated that excessive accumulation of soil available phosphorus under pig manure application reduced microbial community function, implying that the excessive application of pig manure could reduce soil quality.

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Soil texture affects soil microbial and structural recovery during grassland restoration

Cited by 252 publications

References 50 publications

Conservation tillage increases soil bacterial diversity in the dryland of northern China

Conservation tillage increases soil bacterial diversity in the dryland of northern China

Physiological shifts in the microbial community drive changes in enzyme activity in a perennial agroecosystem

Accumulation of Soil Available Phosphorus under Pig Manure Application Limits Microbial Community Function in Upland Soils

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