scholarly journals Emergence of the Reactivity Continuum of Organic Matter from Kinetics of a Multitude of Individual Molecular Constituents

2017 ◽  
Vol 51 (20) ◽  
pp. 11571-11579 ◽  
Author(s):  
Alina Mostovaya ◽  
Jeffrey A. Hawkes ◽  
Birgit Koehler ◽  
Thorsten Dittmar ◽  
Lars J. Tranvik
Keyword(s):  
Organic Matter ◽  
Kinetics Of ◽  
Reactivity Continuum

scholarly journals Effects of compositional changes on reactivity continuum and decomposition kinetics of lake dissolved organic matter

2016 ◽  
Vol 121 (7) ◽  
pp. 1733-1746 ◽  
Author(s):  
Alina Mostovaya ◽  
Birgit Koehler ◽  
François Guillemette ◽  
Anna-Kristina Brunberg ◽  
Lars J. Tranvik
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Decomposition Kinetics ◽  
Compositional Changes ◽  
Kinetics Of ◽  
Reactivity Continuum

scholarly journals The kinetics curve of nitrogen mineralization from perennial leaves litter decomposed by earthworm (Phretima californica)

2020 ◽  
Vol 17 (2) ◽  
pp. 152
Author(s):  
Kartika Utami ◽  
Eko Hanudin ◽  
Makruf Nurudin
Keyword(s):  
Organic Matter ◽  
N Mineralization ◽  
Second Order ◽  
Total Biomass ◽  
Organic Matter Quality ◽  
Lack Of Information ◽  
Pioneer Plants ◽  
Decomposition Of Organic Matter ◽  
N Release ◽  
Kinetics Of

The kinetics of N release during the process of decomposition of organic matter is influenced by organic matter quality, temperature, humidity, and decomposer. Acacia, coffee, salacca, and bamboo leaf litter are native plants and be the pioneer plants on the slopes of Mount Merapi after the eruption in 2010. However, there is a lack of information on the N mineralization process from the leaves litter of acacia, coffee, salacca, and bamboo. The study aimed to determine the kinetics of N release from the litter leaves of acacia (<em>Acacia decurrens</em>), coffee, salacca, and bamboo, which were tested with three approaches, namely zero order, first order, and second order. The experiment was carried out using 10 <em>Phretima californica </em>earthworms that were incubated with 35g of annual plant leaves at 25°C. The levels of NH<sub>4</sub><sup>+</sup> and NO<sub>3</sub><sup>-</sup> were measured at 0, 7, 15, 30, 45, 75, and 105 days after incubation by using the indophenol blue and derivative spectrophotometric method, respectively. Throughout the decomposition 105 days, the release of NO<sub>3</sub><sup>-</sup> was higher than that of NH<sub>4</sub><sup>+</sup> due to the nature of NH<sub>4</sub><sup>+</sup> that was more easily immobilized than NO<sub>3</sub><sup>-</sup>. The highest NO<sub>3</sub><sup>- </sup>release in acacia litter (1.56 mg kg<sup>-1</sup>) occurred 30 days after incubation, while in coffee, salacca, and bamboo occurred 105 days after incubation, reaching 1.92 mg kg<sup>-1</sup>, 2.47 mg kg<sup>-1</sup>, and 1.88 mg kg<sup>-1</sup>, respectively. High N compound on the leaves litter unaffected to increasing total biomass earthworms in the end of incubation however promotes N mineralization rapidly. The kinetics of the second-order equation showed higher compatibility than the other equations to the N release with coefficient determination was higher. The kinetics of mineralization can be a strategy to use the leaves litter of perennial plants as sources of N nutrient input into soil.

scholarly journals The dissociation kinetics of Cu-dissolved organic matter complexes from soil and soil amendments

2010 ◽  
Vol 670 (1-2) ◽  
pp. 24-32 ◽  
Author(s):  
F. Amery ◽  
F. Degryse ◽  
C. Van Moorleghem ◽  
M. Duyck ◽  
E. Smolders
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Soil Amendments ◽  
Dissociation Kinetics ◽  
Kinetics Of
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