Storage and stability of biochar-derived carbon and total organic carbon in relation to minerals in an acid forest soil of the Spanish Atlantic area

2017 ◽  
Vol 587-588 ◽  
pp. 204-213 ◽  
Author(s):  
Oihane Fernández-Ugalde ◽  
Nahia Gartzia-Bengoetxea ◽  
Javier Arostegi ◽  
Lur Moragues ◽  
Ander Arias-González
Keyword(s):  
Organic Carbon ◽  
Total Organic Carbon ◽  
Forest Soil ◽  
Acid Forest Soil ◽  
Spanish Atlantic ◽  
Atlantic Area

scholarly journals Microbiological Attributes of a Cohesive Yellow Latosol Under Different Land Use Systems

2020 ◽  
Vol 8 (4) ◽  
pp. 696
Author(s):  
João Manoel Da Silva ◽  
Arthur Costa Pereira Santiago De Almeida ◽  
Crísea Cristina Nascimento De Cristo ◽  
Yamina Coentro Montaldo ◽  
Kariane Cavalcante Vasconcelos De Lima ◽  
...  
Keyword(s):  
Land Use ◽  
Microbial Biomass ◽  
Organic Carbon ◽  
Total Organic Carbon ◽  
Forest Soil ◽  
Environmental Standards ◽  
Organic C ◽  
Land Use Systems ◽  
Microbial C ◽  
Total Organic C

The objective of this study was to evaluate the microbiological attributes of a Cohesive Yellow Latosol. Collections were carried out in three land use systems (LUS). The first, with natural rainforest (NR), the second with sugarcane (SC) cultivated since 2009, and the third under Mimosa cesalpiniifolia (MC) introduced in 1999. Microbiological analyzes were carried out by determining the carbon from microbial biomass, readily mineralizable carbon, microbial respiration, metabolic quotient, total organic carbon, microbial C/total organic C ratio, and occurrence of cellulolytic and ammonifiers microorganisms. Analysis of variance was performed to verify the different measures of microbiological attributes. The variation obtained from CMB was from 3.06 to 4 µg.C.g-1 in NR, 3.02 to 3.92 µg.C.g-1 in MC, and 3.14 to 3.24 µg.C.g-1 in SC. For accumulated CO2, no differences were found between environments, with values ranging from 77 to 55.70 µg.Kg-1 for NR, 80.30 to 49.56 for MC, and 80.30 to 49.56 for SC. qCO2 had no significant effect, and in relation to total organic carbon the forest soil (NR). These results demonstrate that the microbiological attributes of the soil are influenced by cover, environmental standards and soil management, and the sampling time. The forest soil showed superior microbial biomass when compared to other soils. The metabolic control detected a difference between the collection times. For the accumulated CO2 resources, no changes were observed.

scholarly journals RESEARCH AND ASSESSMENT OF FOREST SOIL PROPERTIES IN SOUTH-EASTERN LITHUANIA / PIETRYČIŲ LIETUVOS MIŠKO DIRVOŽEMIO SAVYBIŲ TYRIMAI IR VERTINIMAS

2011 ◽  
Vol 3 (5) ◽  
pp. 70-76
Author(s):  
Dovilė Vaitkutė ◽  
Pranas Baltrėnas
Keyword(s):  
Soil Moisture ◽  
Organic Carbon ◽  
Pinus Sylvestris ◽  
Soil Properties ◽  
Total Organic Carbon ◽  
Forest Soil ◽  
Soil Samples ◽  
Chemical Research ◽  
South Eastern ◽  
Made In

Along with chemical research on the Scots pine (Pinus sylvestris L.) growing in the South – Eastern part of Lithuania, the analysis of soil properties was given close attention. The analysed forest soil samples were collected in the spring and summer seasons of 2011. Before sampling, a grid of the area covering 10×10 km including all biggest forest areas of the territory was made. In total, 42 composite forest soil samples were examined. The conducted analysis measured soil moisture, pH and the content of total organic carbon. The assessment of these parameters and performed statistical analysis has disclosed that the content of total organic carbon positively and significantly correlates with pH and the content of soil moisture. Additionally, it has been determined that the content of total organic carbon tends to increase when pH of soil is close to neutral and a total value of soil moisture does not reach 0,61%. Santrauka Tiriant Pietryčių Lietuvos paprastosiose pušyse (Pinus sylvestris L.) susikaupusių metalų kiekius, daug dėmesio buvo skiriama dirvožemio savybių analizei. Straipsnyje aptariami miško dirvožemio ėminiai, imti 2011 m. pavasarį ir vasarą. Prieš atliekant lauko tyrimus buvo sudarytas 10 ×10 km dydžio ėminių ėmimo tinklelis, apimantis didžiausius Pietryčių Lietuvos miškų masyvus. Iš viso ištirti 42 sudėtiniai miško dirvožemio ėminiai. Buvo nustatomas dirvožemio drėgnis, pH ir bendrosios organinės anglies kiekis. Įvertinus šiuos parametrus ir atlikus statistinę analizę nustatyta, kad dirvožemio bendrosios organinės anglies kiekis priklauso nuo dirvožemio pH ir drėgnio. Taip pat įvertinus organinės anglies kiekio priklausomybę nuo abiejų minėtųjų parametrų, pastebėta tendencija, kad bendrosios organinės anglies kiekis gali siekti net 30–50 mg/kg (vidutinė koncentracija Pietryčių Lietuvoje yra 6–10 mg/kg), dirvožemio pH vertė – 6–8, o dirvožemio drėgnis mažesnis nei 0,6 %.

CHARACTERISATION OF DISSOLVED ORGANIC CARBON (DOC) LEACHED FROM LEAVES IN WATER

2008 ◽  
Vol 6 (1) ◽  
Author(s):  
Markus Heryanto Langsa
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Total Organic Carbon ◽  
Gas Chromatography Mass Spectrometry ◽  
Pyrolysis Gas ◽  
Pyrolysis Gas Chromatography ◽  
Chromatography Mass Spectrometry ◽  
Pinus Radiate

<p>Penelitian ini bertujuan untuk menentukan senyawa organik khususnya organic karbon terlarut (DOC) dari dua spesies daun tumbuhan (<em>wandoo eucalyptus </em>and <em>pinus radiate, conifer</em>) yang larut dalam air selama periode 5 bulan leaching eksperimen. Kecepatan melarutnya senyawa organic ditentukan secara kuantitatif dan kualitatif menggunakan kombinasi dari beberapa teknik diantaranya Total Organic Carbon (TOC) analyser, Ultraviolet-Visible (UV-VIS) spektrokopi dan pyrolysis-gas chromatography-mass spectrometry (Py-GC-MS).</p><p>Hasil analisis DOC dan UV menunjukkan peningkatan yang tajam dari kelarutan senyawa organic di awal periode pengamatan yang selanjutnya berkurang seiring dengan waktu secara eksponensial. Jumlah relatif senyawa organic yang terlarut tergantung pada luas permukaan, aktifitas mikrobiologi dan jenis sampel tumbuhan (segar atau kering) yang digunakan. Fluktuasi profil DOC dan UV<sub>254</sub> disebabkan oleh aktifitas mikrobiologi. Diperoleh bahwa daun kering lebih mudah terdegradasi menghasilkan senyawa organic dalam air dibandingkan dengan daun segar. Hasil pyrolysis secara umum menunjukkan bahwa senyawa hidrokarbon aromatic dan fenol (dan turunannya) lebih banyak ditemukan pada residue sampel setelah proses leaching kemungkinan karena adanya senyawa lignin atau aktifitas humifikasi mikrobiologi membuktikan bahwa senyawa-senyawa tersebut merupakan komponen penting dalam proses karakterisasi DOC.</p>

Total organic carbon and the preservation of organic-walled microfossils in Precambrian shale

Geology ◽  
2020 ◽  
Author(s):  
C.R. Woltz ◽  
S.M. Porter ◽  
H. Agić ◽  
C.M. Dehler ◽  
C.K. Junium ◽  
...  
Keyword(s):  
Species Richness ◽  
Organic Carbon ◽  
Total Organic Carbon ◽  
Microbial Degradation ◽  
Sedimentation Rate ◽  
Surface Pattern ◽  
Causal Factors ◽  
Eukaryotic Diversity ◽  
High Concentrations ◽  
Fossil Preservation

Much of our understanding of early eukaryote diversity and paleoecology comes from the record of organic-walled microfossils in shale, yet the conditions controlling their preservation are not well understood. It has been suggested that high concentrations of total organic carbon (TOC) inhibit the preservation of organic fossils in shale, and although this idea is supported anecdotally, it has never been tested. Here we compared the presence, preservational quality, and assemblage diversity of organic-walled microfossils to TOC concentrations of 346 shale samples that span the late Paleoproterozoic to middle Neoproterozoic in age. We found that fossil-bearing samples have significantly lower median TOC values (0.32 wt%, n = 189) than those containing no fossils (0.72 wt%, n = 157). Preservational quality, measured by the loss of surface pattern, density of pitting, and deterioration of wall margin, decreases as TOC increases. Species richness negatively correlates with TOC within the ca. 750 Ma Chuar Group (Arizona, USA), but no relationship is observed in other units. These results support the hypothesis that high TOC content either decreases the preservational quality or inhibits the preservation of organic-walled microfossils altogether. However, it is also possible that other causal factors, including sedimentation rate and microbial degradation, account for the correlation between fossil preservation and TOC. We expect that as TOC varies in space and time, so too does the probability of finding well-preserved fossils. A compilation of 13,940 TOC values spanning Earth history suggests significantly higher median TOC levels in Mesoproterozoic versus Neoproterozoic shale, potentially biasing the interpreted pattern of increased eukaryotic diversity in the Tonian.

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