Dissolved organic carbon content and characteristics in relation to carbon dioxide partial pressure across Poyang Lake wetlands and adjacent aquatic systems in the Changjiang basin

2016 ◽  
Vol 219 ◽  
pp. 714-723 ◽  
Author(s):  
Huaxin Wang ◽  
Ruyuan Jiao ◽  
Fang Wang ◽  
Lu Zhang ◽  
Weijin Yan
Keyword(s):  
Carbon Dioxide ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Partial Pressure ◽  
Carbon Content ◽  
Poyang Lake ◽  
Aquatic Systems ◽  
Carbon Dioxide Partial Pressure ◽  
Organic Carbon Content ◽  
Lake Wetlands

Dynamics of selected chemical and microbiological properties changes in soils after application of ultra-fine powdered calcium carbonate – incubation studies

2020 ◽  
Author(s):  
Karolina Woźnica ◽  
Michał Gąsiorek ◽  
Justyna Sokołowska ◽  
Agnieszka Józefowska ◽  
Tomasz Zaleski
Keyword(s):  
Calcium Carbonate ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Soil Properties ◽  
Carbon Content ◽  
Buffer Capacity ◽  
Microbial Biomass Carbon ◽  
Soil Samples ◽  
Organic Carbon Content ◽  
Biomass Carbon

<p>Soil acidification is a serious problem on a global scale, about 30% of land surface is occupied by acidic soils (pH≤ 5.5). Recent research indicates, that more than 50% of arable soils in Poland have too low pH. Acid soils are characterised the ability to mobilize toxic metals and increased plant uptake as well as decreased microbial activity in the soil. Progressive acidification leads to degradation of soils and caused that they are marginal for agricultural production. Soil acidification is a naturally occurring process, but only when natural factors are supported by intensive human activity, especially by nitrogen fertilisers application, intensive degradation is observed. Traditionally method to increase soil pH is the application of lime materials e.g. calcite, burnt lime or dolomite. The liming efficiency depends on lime material type (primarily chemical form of calcium compounds), the neutralising value, lime application method, soil properties and the particle size distribution of lime. The aim of this research was to determine the rate of action and influence of ultra-fine powdered calcium carbonate on selected chemical and microbiological soil properties.</p><p>The incubation studies were conducted on the three soils (G1, G2 – silt loam and G3 – sandy loam). Soil samples were taken from the 0-20 cm layer. Soil properties were measured after 7, 14, 30, 60 and 120 days of incubation. The liming factor was ultra-fine powdered calcium carbonate with particle size distribution < 0.08 mm. The application dose was calculated for 0.5 soil hydrolytic acidity. In the soil samples pH<sub>KCl</sub>, buffer capacity, microbial biomass carbon and dissolved organic carbon content were measured.</p><p>Application of lime caused an increase of pH value in all studied soils. The highest increase of the pH<sub>KCl </sub>was noted between 0 to 7<sup>th</sup> day of incubation. Afterward, the pH<sub>KCl </sub>decreased slowly for the soil G1 and G2. However, in the soil G3 significantly decreased just after 7<sup>th</sup> to 14<sup>th </sup>day, and afterward, the pH<sub>KCl</sub> decreased slowly to the end of the incubation period. As a result of liming long-term changes in soil buffer capacity were not noted. The studied soils were characterised by the higher buffer capacity in alkaline than in acidic range. The microbial biomass carbon content was varied during the incubation in all studied soils. The dissolved organic carbon content increased during the incubation, starting from the 7<sup>th</sup> to the 120<sup>th</sup> day of incubation for G2 and G3 soils and from 14<sup>th </sup>to last day of incubation for G1 soil. Application of lime caused an increase of the dissolved organic carbon content in all studied soils. These studies show that application of ultra-fine powdered calcium carbonate is an effective and fast way to improve soil properties.</p>

scholarly journals Soil Carbon Dioxide Flux and Organic Carbon Content: Effects of Tillage and Nitrogen Fertilization

2011 ◽  
Vol 75 (5) ◽  
pp. 1874-1884 ◽  
Author(s):  
F. J. Morell ◽  
C. Cantero-Martínez ◽  
J. Lampurlanés ◽  
D. Plaza-Bonilla ◽  
J. Álvaro-Fuentes
Keyword(s):  
Carbon Dioxide ◽  
Organic Carbon ◽  
Carbon Content ◽  
Soil Carbon ◽  
Nitrogen Fertilization ◽  
Carbon Dioxide Flux ◽  
Organic Carbon Content ◽  
Soil Carbon Dioxide

scholarly journals Indirect effects of experimental warming on dissolved organic carbon content in subsurface peat

2014 ◽  
Vol 14 (11) ◽  
pp. 1800-1805 ◽  
Author(s):  
Frédéric Delarue ◽  
Sébastien Gogo ◽  
Alexandre Buttler ◽  
Luca Bragazza ◽  
Vincent E. J. Jassey ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Carbon Content ◽  
Indirect Effects ◽  
Organic Carbon Content ◽  
Experimental Warming
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