scholarly journals Microbial biomass in a haplic gleysol in the Mato Grosso State Pantanal

2018 ◽  
Vol 8 (2) ◽  
pp. 209-213
Author(s):  
Daniela Tiago da Silva Campos ◽  
Maíra De Emílio Martins ◽  
Indira Ashant Martins Messias ◽  
Patrícia Teles MEdeiros
Keyword(s):  
Microbial Biomass ◽  
Organic Carbon ◽  
Riparian Forest ◽  
Organic Carbon Content ◽  
Mato Grosso ◽  
Cerrado Vegetation ◽  
Water Conditions ◽  
Microbial Quotient ◽  
Flood Period ◽  
Bacteria And Fungi

The Pantanal is a biome that lives under water conditions and resists to two very distinct periods: flooded and drained. The objective of this study was to evaluate the behavior and quantify the microbial biomass during the flood period, in soils under riparian forest and cerrado vegetation in Mato Grosso State pantanal, at two depths. At depths of 0.00-0.05 m, the highest levels of C-BM and RB were found in cerrado soils; for the metabolic quotient no differences were observed in the two vegetations; the total organic carbon content was higher in riparian forest soils and the microbial quotient was higher in cerrado soils. Bacteria and fungi were found to be more abundant in the cerrado soil at the two evaluated depths and the actinomycetes in the forest. It is concluded that in the flood period there are the presence of active microorganisms which produce a differentiated biomass due to the phytophysiognomy of the location.

scholarly journals Soil age and soil organic carbon content shape biochemical responses to multiple freeze–thaw events in soils along a postmining agricultural chronosequence

2021 ◽  
Author(s):  
Christoph Rosinger ◽  
Michael Bonkowski
Keyword(s):  
Microbial Biomass ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Carbon Content ◽  
Organic Carbon Content ◽  
Freeze Thaw ◽  
Biochemical Responses ◽  
Microbial Responses ◽  
Soil Age ◽  
Carbon Losses

AbstractFreeze–thaw (FT) events exert a great physiological stress on the soil microbial community and thus significantly impact soil biogeochemical processes. Studies often show ambiguous and contradicting results, because a multitude of environmental factors affect biogeochemical responses to FT. Thus, a better understanding of the factors driving and regulating microbial responses to FT events is required. Soil chronosequences allow more focused comparisons among soils with initially similar start conditions. We therefore exposed four soils with contrasting organic carbon contents and opposing soil age (i.e., years after restoration) from a postmining agricultural chronosequence to three consecutive FT events and evaluated soil biochgeoemical responses after thawing. The major microbial biomass carbon losses occurred after the first FT event, while microbial biomass N decreased more steadily with subsequent FT cycles. This led to an immediate and lasting decoupling of microbial biomass carbon:nitrogen stoichiometry. After the first FT event, basal respiration and the metabolic quotient (i.e., respiration per microbial biomass unit) were above pre-freezing values and thereafter decreased with subsequent FT cycles, demonstrating initially high dissimilatory carbon losses and less and less microbial metabolic activity with each iterative FT cycle. As a consequence, dissolved organic carbon and total dissolved nitrogen increased in soil solution after the first FT event, while a substantial part of the liberated nitrogen was likely lost through gaseous emissions. Overall, high-carbon soils were more vulnerable to microbial biomass losses than low-carbon soils. Surprisingly, soil age explained more variation in soil chemical and microbial responses than soil organic carbon content. Further studies are needed to dissect the factors associated with soil age and its influence on soil biochemical responses to FT events.

Effects of Different Applying Fertilization Patterns on Soil Microorganisms, Organic Carbon and Respiration Flux in Maize Grown under Ridge Cultivation

2012 ◽  
Vol 518-523 ◽  
pp. 4701-4706
Author(s):  
Yun Xian Dai ◽  
Jing Hui Liu ◽  
Li Jun Li ◽  
Aodungerile Chen ◽  
Li Gang Wang ◽  
...  
Keyword(s):  
Microbial Biomass ◽  
Organic Carbon ◽  
Soil Respiration ◽  
Carbon Content ◽  
Soil Microbial Biomass ◽  
Organic Fertilizer ◽  
Total Biomass ◽  
Organic Carbon Content ◽  
Soil Microbial ◽  
Organic Carbon Concentration

The effects of three different fertilization patterns including single chemical fertilizer(DH), chemical-organic fertilizer(HY), and single organic fertilizer (DY),no fertilizer(CK) on soil microbial biomass, soil organic carbon content, yield and soil respiration flux in ridge cultivation maize fields in the West Liaohe region were studied. The results showed that soil microbial biomass, organic carbon content, yield and soil respiration flux under HY were higher than the rest of other treatments in 2005 and 2006. The varying order of soil microbial total biomass performed as HY>DY>DH>CK on the ridge-tillage maize farmland. The soil total nitrogen concentration, organic carbon concentration and respiration of HY were significantly higher than the rest of other treatments (p HY> DH > CK; the order of biological yield was DH>HY>DY> CK; the order of grain yield was HY>DH>DY> CK and the economic coefficient of HY was the highest in both years.

scholarly journals SOIL CARBON STOCK IN DIFFERENT USES IN THE SOUTHERN CONE OF MATO GROSSO DO SUL

2020 ◽  
Vol 7 (4) ◽  
pp. 86-94
Author(s):  
Luis Felipe Batista Nandi Martins ◽  
Douglas Troian ◽  
Jean Sérgio Rosset ◽  
Camila Beatriz Da Silva Souza ◽  
Paulo Guilherme Da Silva Farias ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Total Organic Carbon ◽  
Carbon Stock ◽  
Conventional Tillage ◽  
Native Forest ◽  
Organic Carbon Content ◽  
Undisturbed Soil ◽  
Mato Grosso ◽  
Soil Carbon Stock ◽  
A Value

This study aimed to assess the soil density (Sd) and the total organic carbon contents and stocks in different management systems and implementation times in the municipality of Iguatemi, MS, Brazil. A completely randomized design with four replications was applied to four areas: conventional tillage (CT), reformed pasture (RP), and degraded pasture (DP), in addition to a native forest (NF) area with no anthropic action. Disturbed and undisturbed soil samples were collected at depths of 0–0.05, 0.05–0.1, and 0.1–0.2 m. The determination of Sd and total organic carbon content (TOC) allowed calculating the carbon stock (Cstock), the stratification index (SI), and the carbon stock variation (ΔCstock), with subsequent multivariate analysis. The NF area presented the highest TOC contents at all depths compared to the managed areas, with a value of 17.45 g kg−1 at a depth of 0–0.05 m. The RP and NF areas showed similar SI, which was higher in PD, with a value of 2.54. Except for RP, the other managed areas showed a negative ΔCstock in the soil profile relative to the NF area. The RP and NF areas promoted the maintenance of TOC in the soil, while DP and CT compromised the edaphic quality.

scholarly journals Benthic foraminiferal response to variations in temperature, salinity, dissolved oxygen and organic carbon, in the Guanabara Bay, Rio de Janeiro, Brazil

2003 ◽  
Vol 26 ◽  
pp. 36-51
Author(s):  
Patrícia P. B. Eichler ◽  
Beatriz B. Eichler ◽  
Luiz B. de Miranda ◽  
Evelyn Da R. M. Pereira ◽  
Patrícia B. P. Kfouri ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Dissolved Oxygen ◽  
Bottom Water ◽  
Distribution Patterns ◽  
Organic Carbon Content ◽  
Guanabara Bay ◽  
Low Oxygen ◽  
Water Conditions ◽  
Lower Temperature ◽  
Inner Parts

Recent benthic foraminiferal distribution patterns in Guanabara Bay are investigated in relation to temperature, salinity, dissolved oxygen and organic carbon content. Patterns of foraminiferal fauna differ between the entrance of the bay and inner parts. The primary result of the present study is that the distribution of Cassidulina subglobosa and Discorbis williamsoni appear to be governed by lower temperature and higher salinities being found in the entrance of the bay. According to dissolved oxygen content it was observed that Quinqueloculina seminulum occurs when values are higher than 2 mg/l, being intolerant to low oxygen bottom water conditions. By the other hand, Buliminella elegantissima, Bolivina striatula and Bulimmina elongata flourishes under low oxygen waters and in sediment where the organic matter accumulation is high, being found mainly in the central parts of the bay.

scholarly journals Impact of land-use change in the net radiation of the Cerrado of the southern Mato Grosso

2016 ◽  
Vol 11 (2) ◽  
pp. 350 ◽  
Author(s):  
Marcos Alves Fausto ◽  
Lucas Peres Angelini ◽  
Heloisa Oliveira Marques ◽  
Armando Silva Filho ◽  
Nadja Gomes Machado ◽  
...  
Keyword(s):  
Land Use ◽  
Riparian Forest ◽  
Bare Soil ◽  
Radiation Balance ◽  
Net Radiation ◽  
Mato Grosso ◽  
Cerrado Vegetation ◽  
Available Energy ◽  
Agricultural Areas ◽  
The Impact

Changes resulting from land use and occupation modify the surface radioactive balance. This paper evaluated the impact on the net radiation caused by the conversion of a Cerrado area in an agricultural zone in the southern Mato Grosso using Landsat 5 TM sensor imagery acquired between June and October 2011. The analyses were performed of the following land use classes: Cerrado, riparian vegetation, sugarcane, soybean, pasture, bare soil and water. The replacement of Cerrado by agricultural areas changed the biophysical indices of the surface due to the change in biomass and the optical properties of the surface as observed in this study. The NDVI values were higher in the typical Cerrado vegetation and Riparian Forest than in agricultural areas. The surface temperature and the surface albedo showed an inverse pattern of NDVI, with lower values in the typical Cerrado vegetation and Riparian Forest and higher values in agricultural areas and bare soil. The replacement of Cerrado by cultivated crops in the south of Mato Grosso decreased the available energy at the surface, as indicated by the radiation balance.

Relationship between microbial biomass and extractable organic carbon content in volcanic and non-volcanic ash soil

2001 ◽  
Vol 17 (2) ◽  
pp. 183-187 ◽  
Author(s):  
Masaya Nishiyama ◽  
Yuko Sumikawa ◽  
Gang Guan ◽  
Takuya Marumoto
Keyword(s):  
Microbial Biomass ◽  
Organic Carbon ◽  
Carbon Content ◽  
Volcanic Ash ◽  
Organic Carbon Content ◽  
Volcanic Ash Soil

Nonionic organic solute sorption onto two organobentonites as a function of organic-carbon content

2003 ◽  
Vol 266 (2) ◽  
pp. 251-258 ◽  
Author(s):  
Shannon L. Bartelt-Hunt ◽  
Susan E. Burns ◽  
James A. Smith
Keyword(s):  
Organic Carbon ◽  
Carbon Content ◽  
Organic Carbon Content ◽  
Organic Solute

Space-time monitoring of soil organic carbon content across a semi-arid region of Australia

2021 ◽  
Vol 24 ◽  
pp. e00367
Author(s):  
Patrick Filippi ◽  
Stephen R. Cattle ◽  
Matthew J. Pringle ◽  
Thomas F.A. Bishop
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Carbon Content ◽  
Arid Region ◽  
Space Time ◽  
Organic Carbon Content ◽  
Soil Organic Carbon Content ◽  
Semi Arid Region ◽  
Semi Arid
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