Soil Organic Matter and its Stability in Aerobic and Anaerobic Conditions

Kolář, Ladislav; Rostislav, Ledvina; Kužel, S.; Klimeš, Štindl František; Pavel,

doi:10.17221/6506-swr

Soil & Water Res.

2006

DOI: 10.17221/6506-swr

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Soil Organic Matter and its Stability in Aerobic and Anaerobic Conditions

Ladislav Kolář¹,

Ledvina Rostislav²,

S. Kužel³

et al.

Abstract: Abstract:In eight samples of organic and organomineral surface horizons we studied the stability of soil organic matter in aerobic and anaerobic conditions expressed by the rate constant of its biochemical oxidation, total biochemical oxygen demand, substrate production of methane and degradability in anaerobic conditions. In the eight very different samples no relationship was found between aerobic and anaerobic stability of their organic matter; nor was the expected relationship between total biochemical oxy… Show more

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Cited by 7 publications

References 7 publications

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Changes in methane release from organic matter passing through the digestive tract of horses

Kolář¹,

Maršálek²,

Frelich³

et al. 2009

CZECH J ANIM SCI

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ABSTRACT:Using the tests of methanogenic activity (TMA) changes in methane yield (Y CH4 ) and anaerobic degradability (D c ) of organic matter of feeds and excrements were studied in an experimental group of six horses while complete analytical methods were applied (N-compound matters, proteins, non-protein N-compound matters, fat, nitrogen-free extract, ash, crude fibre, organic matter, NDF, ADF, hemicelluloses, cellulose, lignin and chemical oxygen demand COD) and the material balance was determined. The horses utilised 48.8% of organic matter of feeds in dry matter while the daily weight of droppings was 21 kg with 5.20% of dry matter and 4 kg of urine with 7% of organic matters. It is important that the theoretical methane yield per 24 hours corresponding to the organic matter of ingested feeds which was transferred to excrements is 1.771 m 3 CH 4 at 0°C and 1 013.25 hPa while the actual daily methane yield of droppings is 1.739 m 3 CH 4 at 0°C and 1 013.25 hPa, i.e. practically identical, because the yield from urine organic matters was not included in the actual daily methane yield. Because the anaerobic degradability of the used feed mixture and horse droppings is practically identical, it is obvious that besides the enteric fermentation according to the reaction CO 2 + 4 H 2 → CH 4 + 2 H 2 O by hydrogenotrophic methanogens no classical anaerobic digestion takes place in the digestive tract of horses; it means that the horse breeding sector is not a factor contaminating the atmosphere by methane.

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Changes in methane release from organic matter passing through the digestive tract of horses

Kolář¹,

Maršálek²,

Frelich³

et al. 2009

CZECH J ANIM SCI

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Anaerobic degradability of organic matter of cattle faeces and a possibility of its utilization

Kolář¹,

Frelich²,

Brouček³

et al. 2010

CZECH J ANIM SCI

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AbstrAct:The content of organic matter labile fractions is negligible in cattle faeces but the content of the anaerobically degradable fraction on the boundary of organic matter lability and stability is analytically utilizable and different. It depends not only on feed quality and quantity but also on all factors of enteric fermentation and processes determining the digestion of ruminants. In the present paper we attempted to describe the digestive tract of ruminants as an anaerobic bioreactor and to calculate its mass balance so that the measurement of a difference in the anaerobic degradability of feeds and faeces at steady state could be theoretically demonstrated as a multipurpose research method not bothering the animals. The first results in eight variants proved that feed quality and other factors influencing processes in the digestive tract of ruminants could be monitored in this way. Obviously, this method does not replace the present methods used for feed digestibility determination.

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Agrochemical value of organic matter of fermenter wastes in biogas production

Kolář¹,

Kužel²,

Peterka³

et al. 2008

Plant Soil Environ.

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We performed 28-day mesophilic fermentation of a mixture of pig slurry and primary (raw) sludge from the sedimentation stage of a wastewater treatment plant at a 1:1 ratio. The components and the original and fermented mixture of slurry and sludge were subjected to acid hydrolysis. Dry matter of the solid phase of both components and both mixtures was incubated with sandy-loamy Cambisol at a weight ratio 3:1 at 25°C for 20 weeks; in 14-day intervals lipids, crude protein, hemicelluloses, cellulose, lignin, total nitrogen and hot-water-insoluble solids were determined. Changes in ion-exchange and buffering capacity of the test materials were recorded. Labile organic matters were determined after 20 weeks of incubation. Liquid fractions of both components and their mixtures were analysed before and after anaerobic fermentation. It was concluded that beneficial effects of wastes as fertilisers from anaerobic digestion could be attributed to their liquid fraction. After anaerobic digestion the solid fraction of these wastes has relatively increased ion exchange capacity as well as buffering capacity but it is very stable, hardly degradable organic matter, and therefore it cannot play the role of organic matter in soil. This is the reason why it should not be considered as an organic fertiliser.

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Soil Organic Matter and its Stability in Aerobic and Anaerobic Conditions

Cited by 7 publications

References 7 publications

Changes in methane release from organic matter passing through the digestive tract of horses

Changes in methane release from organic matter passing through the digestive tract of horses

Anaerobic degradability of organic matter of cattle faeces and a possibility of its utilization

Agrochemical value of organic matter of fermenter wastes in biogas production

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