Determination of Thiencarbazone in Soil by Oriental Mustard Root Length Bioassay

Weed Science ◽  
2012 ◽  
Vol 60 (3) ◽  
pp. 468-473 ◽  
Author(s):  
Anna M. Szmigielski ◽  
Jeff J. Schoenau ◽  
Eric N. Johnson ◽  
Frederick A. Holm ◽  
Ken L. Sapsford
Keyword(s):  
Organic Carbon ◽  
Carbon Content ◽  
Soil Ph ◽  
Root Length ◽  
Organic Matter Content ◽  
Organic Carbon Content ◽  
Response Curves ◽  
Canadian Prairie ◽  
Ammonium Toxicity ◽  
Oriental Mustard

Using an oriental mustard root length bioassay, thiencarbazone bioavailability and dissipation in five Saskatchewan soils was investigated under laboratory conditions. Thiencarbazone bioavailability was assessed at 0 to 3.9 µg ai kg−1. Thiencarbazone concentrations corresponding to 50% inhibition (I50values) obtained from dose-response curves varied from 0.56 to 1.71 µg kg−1. Multiple regression analysis indicated that organic carbon content (P = 0.018) and soil pH (P = 0.017) predicted thiencarbazone bioavailability. Thiencarbazone dissipation was examined in soils incubated at 23 C and moisture content of 85% field capacity. Thiencarbazone half-lives estimated from dissipation curves were 9 to 50 d, and organic carbon content (P = 0.002) and soil pH (P = 0.008) were significant factors affecting thiencarbazone dissipation. Thiencarbazone bioavailability decreases and dissipation rate is slower in Canadian prairie soils of high organic matter content and low soil pH. Because root length of oriental mustard plants also was reduced by ammonium, therefore ammonium-containing or -producing fertilizers can cause false positive results for thiencarbazone soil residues. Canaryseed roots had the same sensitivity to ammonium as oriental mustard roots but were not inhibited by thiencarbazone. Therefore canaryseed root length bioassay was effective in identifying inhibition caused by ammonium toxicity. Use of oriental mustard root and canaryseed root bioassays together can aid in interpreting bioassay results for detection of thiencarbazone residues.

scholarly journals The accumulation of Mn and Cu in the morphological parts of Solidago canadensis under different soil conditions

PeerJ ◽  
2019 ◽  
Vol 7 ◽  
pp. e8175 ◽  
Author(s):  
Aleksandra Bielecka ◽  
Elżbieta Królak
Keyword(s):  
Organic Carbon ◽  
Carbon Content ◽  
Soil Ph ◽  
Invasive Plant ◽  
Soil Condition ◽  
Soil Conditions ◽  
Soil Reaction ◽  
Organic Carbon Content ◽  
Solidago Canadensis ◽  
Alkaline Soils

Solidago canadensis L. is a drought-tolerant, invasive plant, characterized by a large biomass of underground and aboveground parts. The aim of this study was to assess the accumulation of manganese (Mn) and copper (Cu) in the roots and rhizomes and the stems, leaves, and inflorescence parts in S. canadensis from two locations that differed in soil pH, organic carbon, and Mn and Cu concentrations. The concentration of the metals in the samples was determined by the AAS method; the pH was determined by the potentiometric method; and the content of organic carbon was determined using Tiurin’s method. The concentration of Mn and Cu in the roots of S. candensis correlated with the concentrations of the metals in the soil without regard to the soil condition or its organic carbon content. With a low soil pH and organic carbon content, Mn accumulation per 1 ramet in the aboveground parts of S. canadensis consisted over 50% of the total Mn content in the plant. In neutral or alkaline soils, the amount of Mn per 1 ramet accumulated in underground parts was over 60%. Regardless of the soil conditions, about 35% of Mn accumulated in rhizomes. Approximately 60% of copper accumulated in the underground parts of S. candensis (45% in rhizomes) without regard to the soil reaction or organic carbon content. The ability of the plant to accumulate large amounts of metals disposes Solidago canadensis as a candidate for the phytoremediation of soils contaminated with heavy metals.

scholarly journals The Reactions of Common Chemical Fertilizers in An Ultisol and Their Effects on Cowpea Performance

2019 ◽  
Vol 24 (1) ◽  
pp. 25
Author(s):  
Oyeyiola Yetunde Bunmi ◽  
Omueti John Ajayi
Keyword(s):  
Organic Carbon ◽  
Carbon Content ◽  
Soil Ph ◽  
Organic Materials ◽  
Gliricidia Sepium ◽  
Organic Carbon Content ◽  
Nutrient Depletion ◽  
Chemical Fertilizers ◽  
Single Superphosphate ◽  
Cropping Seasons

Chemical fertilizers (CF) are the major input on arable farms in Nigeria. Current increasing rate of nutrient depletion in CF treated soils calls for the need to study their reactions in soils. To achieve this, three CF based treatments, namely NPK 15:15:15 applied at 40 kg P2O5 ha-1, Urea applied at 20 kg N ha-1  mixed with Single superphosphate at 40 kg P2O5 ha-1, and single superphosphate at 40 kg P2O5 ha-1  mixed with Gliricidia sepium leaves at 20 kg N ha-1  were studied. Sole lime (CaCO3) at 1 Mg ha-1 and a plot that received no amendment were compared. Cowpea was grown for two consecutive cropping seasons in 2012 and 2013 on the treated fields. The results indicated that CF reduced soil pH from initial 4.8 to 4.0. The NPK 15:15:15 fertilizer was the most severe of the CF tested, removing up to 133% alkalinity from the soil relative to lime. The NPK 15:15:15 reduced calcium saturation (from 25% to 21%) and magnesium saturation (from 12% to 8.3%) and increased acidity saturation (from 53% to 66%) with significant reductions in organic carbon content (from 13.2 g kg-1 to 11.0 g kg-1). Precaution including co-application of CF with organic materials such as Gliricidia sepium leaves can benefit for the soils.

scholarly journals The color of refractory organic carbon

2018 ◽  
Vol 189 (2) ◽  
pp. 9 ◽  
Author(s):  
Maxime Debret ◽  
Yoann Copard ◽  
Antonin Van Exem ◽  
Geneviève Bessereau ◽  
Frank Haeseler ◽  
...  
Keyword(s):  
Organic Matter ◽  
Organic Carbon ◽  
Carbon Content ◽  
Anthropogenic Activities ◽  
Organic Matter Content ◽  
Matter Content ◽  
Mineral Matter ◽  
Organic Carbon Content ◽  
Fast Method ◽  
Wide Range

Organic matter studies find an echo within different topics such as biogeochemical cycles, processes occurring in continental surfaces, anthropogenic activities, climate science, earth and planetary sciences, etc. Today’s challenges include finding and developing the most appropriate method(s) supporting the differentiation and characterisation of various types of recalcitrant organic matter in modern environments. In this study, we focus on combustion residues and coals as these two types of organic matter contain a significant amount of so-called recalcitrant organic carbon (black carbon and fossil organic carbon). Both these materials are ubiquitous, broadly stem from the same living organisms and have similar polyaromatic structures. In this respect, we tested a spectrophotometry method, classically used for sedimentology, as a very fast method for preliminary investigations. Analyses were performed with a wide range of standards and referenced samples. The results discriminate three different spectral signatures related to the degree of transformation of organic matter related to the degree of aromaticity (i.e. carbonisation). Using calibration curves, total organic carbon content can be estimated in experimental mixes with mineral matter and in a real context using subsurface sample (Gironville 101 borehole, Paris Basin, France). This method has particularly high sensitivity to very low organic matter content and is shown to be promising for a rapid evaluation of the organic carbon content.

Composted municipal waste effect on chosen properties of calcareous soil

2012 ◽  
Vol 26 (4) ◽  
pp. 365-374 ◽  
Author(s):  
M. Hamidpour ◽  
M. Afyuni ◽  
E. Khadivi ◽  
A. Zorpas ◽  
V. Inglezakis
Keyword(s):  
Electrical Conductivity ◽  
Hydraulic Conductivity ◽  
Organic Carbon ◽  
Carbon Content ◽  
Soil Ph ◽  
Calcareous Soil ◽  
Aggregate Stability ◽  
Municipal Waste ◽  
Organic Carbon Content ◽  
Compost Application

Abstract A 3-year field study was conducted to assess effects of composted municipal waste on some properties, distribution of Zn, Cu in a calcareous soil and uptake of these metals by wheat. The treatments were 0, 25, 50 and 100 Mg ha-1 of municipal solidwastewhichwas applied in three consecutive years. The application of composted municipal waste increased the saturated hydraulic conductivity, the aggregate stability,the organic carbon content and electrical conductivity, whereas it slightly decreased the soil pH and bulk density. A significant increase in the concentration of Zn and Cu were observed with increasing number and rate of compost application. The distribution of Zn and Cu between the different fractions in untreated and treated soils showed that the majority of Zn and Cu were in the residual form. Finally, the levels of Zn and Cu were higher in grains of wheat grown in composttreated plots compared to that grown in the control plots.

scholarly journals Hubungan antara Konsentrasi Cr(VI) dan Sifat Kimia Tanah: Informasi Awal untuk Remediasi Lahan Bekas Tambang di Kalimantan Selatan

2013 ◽  
Vol 14 (2) ◽  
pp. 97-103 ◽  
Author(s):  
Akhmad Rizalli Saidy ◽  
. Badruzsaufari
Keyword(s):  
Heavy Metals ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Carbon Content ◽  
Soil Ph ◽  
Mining Activity ◽  
Chemical Characteristics ◽  
Organic Carbon Content ◽  
High Concentration ◽  
Preliminary Information

High concentration of heavy metals is frequently observed as an effect of mining activity. In order to determine relationship between concentration of Cr(VI) in ex-mined land and soil chemical characteristics, 15 of soils were sampled from ex-coal and chromate mined-lands in the South Kalimantan Province. Result of the experiment revealed that soils from the ex-mined lands contained 700 - 2645 mg Cr kg-1 soil. This research also showed that 0,73-1,35% of total Cr in these soils exist in the form of hexavalent chromium (Cr(VI)) that is toxic and carcinogen. Concentration of Cr(VI) in these soils were correlated significantly with soil pH in which increasing soil pH would lead to increase in concentration of Cr(VI). In addition, increasing in soil organic carbon will be followed by decreasing concentration of Cr(VI). Relationship between concentration of Cr(VI) and soil pH and organic carbon content could be useful for preliminary information for Cr reclamation of ex-mined lands.

Effects of fresh rice straw and water levels on CO2-C gas emission, soil organic carbon content and rice production

2018 ◽  
Vol 7 (1) ◽  
pp. 45-53
Author(s):  
MB Hossain
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Carbon Content ◽  
Rice Straw ◽  
Soil Ph ◽  
Rice Production ◽  
Organic Carbon Content ◽  
Gas Emission ◽  
Chemical Fertilizers ◽  
Continuous Flooding

An experiment was conducted at Bangladesh Institute of Nuclear Agriculture (BINA) farm, Mymensingh, Bangladesh during 2010-2011 to find out the effect of different water and organic residue levels on rice production and soil organic carbon content. Organic carbon rates from rice straw (0.5, 1.0, 1.5 and 2.0 t C ha-1 including control) were evaluated under alternate wetting and drying (AWD) and continuous flooding (CF) systems. Each treatment also received the recommended dose of chemical fertilizers excluding control. Factorial experiment was laid out in a complete randomized design with three replications. Results revealed that, maximum plant height, filled grains per tiller, 1000 grains weight, grain and straw yield were also observed in continuous flooding system in combination with 2.0 t C ha-1 in 2010 and 2011, respectively. Combined use of chemical fertilizers, 2.0 t C ha-1 fresh rice straw and continuous flooding system performed better results to reduce CO2-C gas emission, increased organic carbon and rice production with maintaining optimum soil pH level. Continuous flooding with 2.0 t C ha-1 as fresh rice straw is an effective way to reduce CO2-C emission, optimize soil pH and contribute to sustainable rice production for food security.Jahangirnagar University J. Biol. Sci. 7(1): 45-53, 2018 (June)

scholarly journals Effect of Inoculation of Microbial Consortia on Soil Physicochemical and Nutrient Status

2020 ◽  
pp. 1-8
Author(s):  
Y. Kavya ◽  
N. Trimurtulu ◽  
A. Vijaya Gopal ◽  
P. Madhu Vani ◽  
N. V. V. S. D. Prasad
Keyword(s):  
Organic Carbon ◽  
Carbon Content ◽  
Soil Ph ◽  
Microbial Consortium ◽  
Nutrient Status ◽  
Microbial Consortia ◽  
Organic Carbon Content ◽  
Chemical Fertilizers ◽  
Available Nitrogen ◽  
Available Nutrients

The experiment was conducted in kharif, 2018 at ARS, Amaravathi, Guntur district, to find the efficiency of carrier based microbial consortia. In sorghum carrier based microbial consortia was applied along with different doses of chemical fertilizers. Microbial consortium-1 (Azospirillium, P-solubilizer, K-releaser, Zn-solubilizer and PGPR isolate), Microbial consortium-2 (Azotobacter, Azospirillium, P-solubilizer, K-releaser, Zn-solubilizer and PGPR isolate) were used in the study. Soil pH, electrical conductivity (EC), organic carbon, available nitrogen, phosphorus, potassium were recorded during different intervals of crop growth. The treatments with microbial consortia and 75% Recommended Dose of Fertilizers (RDF) showed increased available nutrients content. Soil pH was neutralized in the microbial consortia added treatments, while in treatments with RDF alone the pH was more. There was a significant increase in organic carbon content in treatments with microbial consortia and 75% RDF. Highest available nutrients and organic carbon content was observed in T10 (75% RDF+ Microbial consortium-2). The organic carbon content improved gradually during the crop period and highest was at harvesting stage. All the soil physicochemical properties were improved by the microbial consortia with decreased doses of chemical fertilizers compared to the treatments added with chemical fertilizers alone.

scholarly journals Organic carbon inventories in natural and restored Ecuadorian mangrove forests

2013 ◽  
Author(s):  
Amanda G DelVecchia ◽  
John F Bruno ◽  
Larry K Benninger ◽  
Marc Alperin ◽  
Ovik Banerjee ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Carbon Content ◽  
Carbon Storage ◽  
Organic Matter Content ◽  
Carbon Stocks ◽  
Organic Carbon Content ◽  
Mangrove Forests ◽  
Storage Potential ◽  
Sediment Carbon

Because mangroves can capture and store organic carbon, their protection and restoration is an obvious component of climate change mitigation. However, there are few empirical measurements of long-term carbon storage in mangroves or of how storage varies across environmental gradients. The context dependency of this process combined with geographically limited field sampling has made it difficult to generalize regional and global rates of mangrove carbon sequestration. This has in turn hampered the inclusion of sequestration by mangroves in carbon cycle models and in carbon offset markets. The purpose of this study was to estimate the relative carbon capture and storage potential in natural and restored mangrove forests. We measured depth profiles of soil organic carbon content in 72 cores collected from six sites (three natural, two restored, and one afforested) surrounding Muisne, Ecuador. Samples up to 1 m deep were analyzed for organic matter content using loss-on-ignition and values were converted to organic carbon content using an accepted ratio of 1.72 (g/g). Results suggest that average soil carbon storage is 0.055 ± 0.002 g∙cm-3 (11.3 ± 0.8% carbon content by dry mass, mean ± 1 SE) up to 1 m deep in natural sites, and 0.058 ± 0.002 g∙cm-3 (8.0 ± 0.3%) in restored sites. These estimates are concordant with published global averages. Evidence of equivalent carbon stocks in restored and afforested mangrove patches emphasizes the carbon sink potential for reestablished mangrove systems. We found no relationship between sediment carbon storage and aboveground biomass, forest structure, or within-patch location. Our results demonstrate the long-term carbon storage potential of natural mangroves, high effectiveness of mangrove restoration and afforestation, a lack of predictability in carbon storage strictly based on aboveground parameters, and the need to establish standardized protocol for quantifying mangrove sediment carbon stocks.

scholarly journals Organic carbon inventories in natural and restored Ecuadorian mangrove forests

2013 ◽  
Author(s):  
Amanda G DelVecchia ◽  
John F Bruno ◽  
Larry K Benninger ◽  
Marc Alperin ◽  
Ovik Banerjee ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Carbon Content ◽  
Carbon Storage ◽  
Organic Matter Content ◽  
Carbon Stocks ◽  
Organic Carbon Content ◽  
Mangrove Forests ◽  
Storage Potential ◽  
Sediment Carbon

Because mangroves can capture and store organic carbon, their protection and restoration is an obvious component of climate change mitigation. However, there are few empirical measurements of long-term carbon storage in mangroves or of how storage varies across environmental gradients. The context dependency of this process combined with geographically limited field sampling has made it difficult to generalize regional and global rates of mangrove carbon sequestration. This has in turn hampered the inclusion of sequestration by mangroves in carbon cycle models and in carbon offset markets. The purpose of this study was to estimate the relative carbon capture and storage potential in natural and restored mangrove forests. We measured depth profiles of soil organic carbon content in 72 cores collected from six sites (three natural, two restored, and one afforested) surrounding Muisne, Ecuador. Samples up to 1 m deep were analyzed for organic matter content using loss-on-ignition and values were converted to organic carbon content using an accepted ratio of 1.72 (g/g). Results suggest that average soil carbon storage is 0.055 ± 0.002 g∙cm-3 (11.3 ± 0.8% carbon content by dry mass, mean ± 1 SE) up to 1 m deep in natural sites, and 0.058 ± 0.002 g∙cm-3 (8.0 ± 0.3%) in restored sites. These estimates are concordant with published global averages. Evidence of equivalent carbon stocks in restored and afforested mangrove patches emphasizes the carbon sink potential for reestablished mangrove systems. We found no relationship between sediment carbon storage and aboveground biomass, forest structure, or within-patch location. Our results demonstrate the long-term carbon storage potential of natural mangroves, high effectiveness of mangrove restoration and afforestation, a lack of predictability in carbon storage strictly based on aboveground parameters, and the need to establish standardized protocol for quantifying mangrove sediment carbon stocks.

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