Soil microbial indices as bioindicators of environmental changes in a poplar plantation

2005 ◽  
Vol 5 (3) ◽  
pp. 171-179 ◽  
Author(s):  
M.C. Moscatelli ◽  
A. Lagomarsino ◽  
S. Marinari ◽  
P. De Angelis ◽  
S. Grego
Keyword(s):  
Environmental Changes ◽  
Poplar Plantation ◽  
Soil Microbial ◽  
Microbial Indices

scholarly journals Effects of Lime Application and Understory Removal on Soil Microbial Communities in Subtropical Eucalyptus L’Hér. Plantations

Forests ◽  
2019 ◽  
Vol 10 (4) ◽  
pp. 338 ◽  
Author(s):  
Songze Wan ◽  
Zhanfeng Liu ◽  
Yuanqi Chen ◽  
Jie Zhao ◽  
Qin Ying ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Litter Decomposition ◽  
Decomposition Rate ◽  
Environmental Changes ◽  
Soil Microbial Communities ◽  
Dissolved Carbon ◽  
Soil Microbial ◽  
Litter Decomposition Rate ◽  
Eucalyptus Plantations ◽  
Lime Application

Soil microorganisms play key roles in ecosystems and respond quickly to environmental changes. Liming and/or understory removal are important forest management practices and have been widely applied to planted forests in humid subtropical and tropical regions of the world. However, few studies have explored the impacts of lime application, understory removal, and their interactive effects on soil microbial communities. We conducted a lime application experiment combined with understory removal in a subtropical Eucalyptus L’Hér. plantation. Responses of soil microbial communities (indicated by phospholipid fatty acids, PLFAs), soil physico-chemical properties, and litter decomposition rate to lime and/or understory removal were measured. Lime application significantly decreased both fungal and bacterial PLFAs, causing declines in total PLFAs. Understory removal reduced the fungal PLFAs but had no effect on the bacterial PLFAs, leading to decreases in the total PLFAs and in the ratio of fungal to bacterial PLFAs. No interaction between lime application and understory removal on soil microbial community compositions was observed. Changes in soil microbial communities caused by lime application were mainly attributed to increases in soil pH and NO3–-N contents, while changes caused by understory removal were mainly due to the indirect effects on soil microclimate and the decreased soil dissolved carbon contents. Furthermore, both lime application and understory removal significantly reduced the litter decomposition rates, which indicates the lime application and understory removal may impact the microbe-mediated soil ecological process. Our results suggest that lime application may not be suitable for the management of subtropical Eucalyptus plantations. Likewise, understory vegetation helps to maintain soil microbial communities and litter decomposition rate; it should not be removed from Eucalyptus plantations.

scholarly journals Biochar application on paddy and purple soils in southern China: soil carbon and biotic activity

2019 ◽  
Vol 6 (7) ◽  
pp. 181499 ◽  
Author(s):  
Shen Yan ◽  
Zhengyang Niu ◽  
Aigai Zhang ◽  
Haitao Yan ◽  
He Zhang ◽  
...  
Keyword(s):  
Soil Carbon ◽  
Crop Production ◽  
Environmental Changes ◽  
Southern China ◽  
Agricultural Practices ◽  
Carbon Pool ◽  
Carbon Pools ◽  
Soil Carbon Pool ◽  
Soil Microbial ◽  
Soil Carbon Pools

Soil carbon reserves are the largest terrestrial carbon pools. Common agricultural practices, such as high fertilization rates and intensive crop rotation, have led to global-scale environmental changes, including decreased soil organic matter, lower carbon/nitrogen ratios and disruption of soil carbon pools. These changes have resulted in a decrease in soil microbial activity, severe reduction in soil fertility and transformation of soil nutrients, thereby causing soil nutrient imbalance, which seriously affects crop production. In this study, 16S rDNA-based analysis and static chamber-gas chromatography were used to elucidate the effects of continuous application of straw biochar on soil carbon pools and the soil microbial environments of two typical soil types (purple and paddy soils) in southern China. Application of biochar (1) improved the soil carbon pool and its activity, (2) significantly promoted the release of soil CO 2 and (3) improved the soil carbon environment. Soil carbon content was closely correlated with the abundance of organisms belonging to two orders, Lactobacillales and Bacteroidales, and, more specifically, to the genus Lactococcus . These results suggest that biochar affects the soil carbon environment and soil microorganism abundance, which in turn may improve the soil carbon pool.

Interactive effect of vegetation and climate warming on total microbial and fungal biomass in soil

2020 ◽  
Author(s):  
Maria Udovenko ◽  
Vusal Guliyev ◽  
Evgenia Blagodatskaya
Keyword(s):  
Climate Change ◽  
Land Use ◽  
Microbial Biomass ◽  
Fungal Biomass ◽  
Soil Microbial Biomass ◽  
Environmental Changes ◽  
Interactive Effect ◽  
Environmental Research ◽  
Research Station ◽  
Soil Microbial

<p>Soil microbiota ensuring sustainable functioning of terrestrial ecosystems is strongly dependent on climatic conditions and vegetation type. Even within the same climatic zone, active land use alters the size, structure and functioning of the microbial community. We hypothesized that land use effect on soil microbial biomass will be more pronounced under impact of global warming. We also tested whether the biomass of specific microbial group (e.g., fungi) is more sensitive to environmental changes than total microbial biomass.</p><p>We proved these hypotheses in the experiments based on Global Change Experimental Facility platform, located at the field research station of the Helmholtz-Centre for Environmental Research in Bad Lauchstädt near Halle, Saxon-Anhalt, Germany. Experimental setup included 50 plots, located in 10 blocks (5 plots per block). Five blocks are under ambient climate and the rest 5 blocks are subjected to a realistic climate change treatment (under conditions predicted by several models of climate change in Central Germany for 2050–2080 period). Five land use types were established in every block: conventional farming; organic farming; intensively used meadow, extensively used meadow and extensively used pasture. We determined soil microbial biomass and its fungal component by chloroform fumigation-extraction method and by ergosterol content, respectively. We found that fungal biomass was more sensitive to intensive land use for crop production than to climate change. The possible mechanisms of such a sensitivity will be discussed.</p>

scholarly journals GRASSES AND LEGUMES AS COVER CROPS AFFECT MICROBIAL ATTRIBUTES IN OXISOL IN THE CERRADO (SAVANNAH ENVIRONMENT) IN THE NORTHEAST REGION1

2020 ◽  
Vol 33 (1) ◽  
pp. 31-42 ◽  
Author(s):  
SARAH PRISCILLA DO NASCIMENTO AMORIM ◽  
CÁCIO LUIZ BOECHAT ◽  
LIZANDRA DE SOUSA LUZ DUARTE ◽  
CÍNTIA BEZERRA ROCHA ◽  
FILIPE SELAU CARLOS
Keyword(s):  
Cover Crops ◽  
Environmental Changes ◽  
Positive Impact ◽  
N Dynamics ◽  
Carbon And Nitrogen ◽  
Soil Microbial ◽  
C And N ◽  
And Control ◽  
Crotalaria Spectabilis

ABSTRACT The cover crop straw may cause changes in the microbial activity and population, with repercussions on environmental changes and on the C and N dynamics, providing important information for the planning of adequate land use in the Cerrado. The objective of this study was to evaluate the effect of straw of cover crops on the soil microbial attributes and quality of organic matter. Experimental units consisted of 100 g of sieved soil placed in small plastic cups mixed with straw from cover plants. Treatments were distributed in a CRD, in a factorial scheme of 7 x 7 + 1, with seven types of straw, evaluated at 7, 14, 21, 28, 42, 63 and 105 days after incubation, and control without straw, with three replicates. The qCO2 ranged from 0.1 (Crotalaria spectabilis at 14 days) to 5.1% (Cajanus cajan ‘IAPAR 43’ at 42 days). The organic carbon and nitrogen reservoir are differently affected by straw of legumes and grasses on the dates. The incorporation of Brachiaria brizantha and Mucuna aterrima had a positive impact on the microbial attributes until the 21st incubation (qCO2, Cmic and Nmic), with little loss of carbon dioxide and growth of the microbial population. All the evaluated species presented a potential to be used in crop rotation systems, enabling no-tillage systems in the Cerrado of Piauí. However, it is recommended to select species according to specific purposes. Thus, the use of cover crops is an important tool for increasing the biological quality of Brazilian northeastern cerrado soils.

scholarly journals Long lasting effects of the conversion from natural forest to poplar plantation on soil microbial communities

2016 ◽  
Vol 182 ◽  
pp. 89-98 ◽  
Author(s):  
Francesco Vitali ◽  
Giorgio Mastromei ◽  
Giuliana Senatore ◽  
Cesarea Caroppo ◽  
Enrico Casalone
Keyword(s):  
Microbial Communities ◽  
Soil Microbial Communities ◽  
Natural Forest ◽  
Poplar Plantation ◽  
Soil Microbial

Evolutionary considerations of claims for physical dormancy-break by microbial action and abrasion by soil particles

2000 ◽  
Vol 10 (4) ◽  
pp. 409-413 ◽  
Author(s):  
Jerry M. Baskin ◽  
Carol C. Baskin
Keyword(s):  
Scientific Literature ◽  
Environmental Changes ◽  
Plant Biology ◽  
Good Chance ◽  
Water Restriction ◽  
Physical Dormancy ◽  
Soil Particles ◽  
Soil Microbial ◽  
Microbial Action ◽  
Seeds And Fruits

AbstractBooks and review articles in various areas of ecology and seed and plant biology continue to report that dormancy-break in seeds (and fruits) with water-impermeable coats (i.e. physical dormancy) occurs via soil-microbial action and/or abrasion by soil particles. However, there is little evidence in the scientific literature to support these assumptions, which, in fact, do not make good evolutionary sense for two related reasons. First, several types of anatomically specialized water-restriction structures have evolved as part of the seed or fruit coat of taxa with physical dormancy. These structures act as ‘signal detectors’ of physical-environmental changes that cause seeds (and fruits) to become water-permeable only at these sites, in seasons and habitats in which there is a good chance that some seedlings will become established. Second, seed (and fruit) coat breakdown by microbial action or by abrasion likely would occur in seasons and habitats in which seedlings could not survive, thus lowering the fitness (λ) of the plant taxa in question.

scholarly journals A framework for refining soil microbial indices as bioindicators during decomposition of various organic residues in a sandy loam soil

2015 ◽  
Vol 7 (2) ◽  
pp. 700-708 ◽  
Author(s):  
Sandeep Sharma ◽  
Jatinder Kaur ◽  
H. S. Thind ◽  
Yadvinder Singh ◽  
Neha Sharma ◽  
...  
Keyword(s):  
Microbial Biomass ◽  
Soil Quality ◽  
Biochemical Composition ◽  
Crop Residues ◽  
Sandy Loam ◽  
Sandy Loam Soil ◽  
Soil Microbial ◽  
Loam Soil ◽  
Microbial Indices ◽  
Amended Soil

Assessment of soil quality is an invaluable tool in determining the sustainability and environmental impact of agricultural ecosystems. Soil microbial indices like microbial biomass and microbial activity are important criteria for the determination of soil quality. Laboratory incubation study was undertaken to examine the influence of eight crop residues widely varying in biochemical composition on the periodic changes in important soil microbial indices {(microbial (Cmic: Corg), metabolic (qCO2), carbon mineralization (qC) and microbial biomass change rate (qM) quotients)} at 28 days and 63 days after incubation (DAI) in a sandy loam soil. A. sativa amended soil showed maximum soil respiration rate (14.23 mg CO2-C g-1 soil day-1) whereas T. aestivum amended soil showed maximum microbial biomass C (790 µg/g). The metabolic quotient among different crop residues ranged from 11.1 to 19.8 μg CO2-C μg-biomass-C-1 h-1 at 63 DAI. The results indicate that incorporation of different crop residues has positive effect on microbial flora and their activity. Microbial quotient (Cmic:Corg) was significantly positively correlated with microbial biomass carbon (MBC), qC and qM. The study suggests that the biochemical composition of different crop residues seems to be of better option for long term sustainable crop production with maintenance of soil quality in a sandy loam soil.

scholarly journals Standing Vegetation Exceeds Soil Microbial Communities in Soil Type Indication: A Procrustes Test of Four Salt-Affected Pastures

Agronomy ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1652
Author(s):  
Péter Csontos ◽  
Márton Mucsi ◽  
Péter Ragályi ◽  
Júlia Tamás ◽  
Tibor Kalapos ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Life Histories ◽  
Environmental Changes ◽  
Soil Microbial Communities ◽  
Chemical Properties ◽  
Principal Component ◽  
Procrustes Analysis ◽  
Soil Conditions ◽  
Habitat Conditions ◽  
Soil Microbial

Organisms with different life histories are able to act as indicators of different characteristics of their environment. Here, we compared the precision of habitat indication by the vegetation and soil microbial communities in four salt-affected pastures: annual open salt sward, Pannonic Puccinellia limosa hollow, Artemisia saline puszta and grassy saline puszta. Dissimilarity of habitats was evaluated by standardized principal component analysis (PCA) based on four different datasets: catabolic profiles of microbial communities in June (a) and September (b), composition of vascular vegetation (c) and physical and chemical properties of the soil (d). Procrustes analysis was used to quantify the resemblance between pairs of PCA ordinations based on soil properties (d) and various biotic communities (a, b, c). PCA ordination based on vegetation most closely matched the soil data-based ordination, thus vegetation appears to better indicate habitat conditions than soil microbial communities do. For microbial communities, a better agreement with the soil data-based ordination was reached in September than in June. Most probably, the long-lived sedentary habit of perennial plants in these communities requires adaptation to long-term average habitat conditions. In contrast, short-lived soil microbes can quickly follow environmental changes, thus the composition of soil microbial communities better reflect actual soil conditions.

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