Effect of a biogas-digestate and bentonite on some enzyme activities of the amended soils

Makádi, Marianna; Tomócsik, Attila; Orosz, Viktória; Bogdányi, Zsolt; Bíró, Borbála

doi:10.1556/crc.35.2007.2.144

Cited by 18 publications

(11 citation statements)

References 2 publications

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“…Dehydrogenase activity in the field soil was increased by all organic fertilizers (Figure 3). This is in accordance with Makádi et al [43], who also found that dehydrogenase activity was promoted by digestate application, while catalase and invertase activity was not enhanced by digestates. Other authors also reported an increase in microbial activity after the application of organic materials such as compost and manure [44,45].…”

Section: Dehydrogenase Activitysupporting

confidence: 92%

The Chemical Composition of Biogas Digestates Determines Their Effect on Soil Microbial Activity

Nielsen

Roß

Hoffmann³

et al. 2020

Agriculture

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Digestates are commonly used as organic inputs in agriculture. This study aimed to answer four questions: (1) What are the immediate and longer-term impacts of digestates on soil microbial activity?; (2) How much of the digestates’ carbon is mineralized within the first months? (3) How do the nitrogen, lignin, cellulose, and hemicellulose contents of digestates influence microbial activity and carbon mineralization? (4) How does the soil type influence mineralization? To investigate this, dehydrogenase activity (DHA) was measured in a field trial and in laboratory experiments with five digestates (DGs), cattle slurry, and cattle manure. DHA measurements were supplemented with soil respiration experiments using two different soils. DHA was significantly increased by all organic inputs, but decreased back to the control level within seven months under field conditions. Twenty percent to 44% of the organic carbon (Corg) in the digestates was converted to CO2 after 178 days. Soil respiration was significantly negatively correlated to lignin content (r = −0.82, p < 0.01) and not correlated to nitrogen, cellulose, or hemicellulose content. On the basis of equal carbon application, slurry promoted soil respiration and DHA more strongly than digestates in the short term.

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Section: Dehydrogenase Activitysupporting

confidence: 92%

The Chemical Composition of Biogas Digestates Determines Their Effect on Soil Microbial Activity

Nielsen

Roß

Hoffmann³

et al. 2020

Agriculture

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show abstract

“…Bentonite has been applied as a soil amendment and appears to have beneficial effects on soil structure in light soils [22] and improve crop yield [23]. It has also been shown to change enzyme activities in soil [24]. However, bentonite appears to bind some water, and this can be harmful for crop growth in dry climates when not irrigated.…”

Section: Introductionmentioning

confidence: 99%

Ammonium Sorbed to Zeolite Is Partly Available to Wheat in the First Growth Cycle

et al. 2019

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Sorption could be a way to concentrate nutrients in diluted waste streams to bring more nutrients back to agriculture. However, the sorbed nutrients must be plant available. The aim of this work was to investigate how plant available nitrogen (N) added sorbed to zeolite and is compared to conventionally added N. First, 15N labelled ammonium was sorbed to a sorbent, zeolite, in an aqueous solution. Then, the fertilizer effect was compared to the ammonium fertilizer and added the conventional way, with and without zeolite. A pot experiment with two soil types (chernozem and sandy soil) and wheat as test crop was used. Results indicated that the fertilizer effect of sorbed ammonium in the first growth cycle is about 50% of ammonium added conventionally. The sorbent itself had a positive effect in sandy soil, but not in chernozem. N uptake without added N was higher in chernozem than in sandy soil and more N from fertilizer was left in the soil after the experiment in the chernozem than in the sandy soil. In conclusion, ammonium added sorbed is plant available to some extent, but less so than conventionally added ammonium.

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“…25 [19]. However, the major part of the carbon pool was present as higher-molecular-weight substances since the degradability of the organic substrate generally decreases during AD resulting in an accumulation of poorly decomposable products [20]. In the present investigation, this could be proven by the fact that at the beginning of anaerobic incubation total VFAs, calculated as the sum of moles of acetate, propionate, iso-butyrate, butyrate, iso-valeriate, and valeriate, were mainly derived from the inoculum when compared to the control (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…2). The increase of VFAs might indicate a hindered or even inhibited (methanogenic) community possibly by substances present in the liquid digester residue, which are known to possibly accumulate [20].…”

Section: Resultsmentioning

confidence: 99%

Using Digestate Compost as a Substrate for Anaerobic Digestion

2018

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Anaerobic digestion (AD) of separately collected biowaste is an ecologically and economically interesting waste treatment technology due to the production of utilizable biogas and coeval reduction of waste mass fractions. The combination of AD with subsequent composting leads to a higher degree of overall biowaste carbon utilization compared to single composting. Compost may also be of interest for an anew digestion step, since carbon, e.g., of lignocellulose, is made available by the aerobic composting process. The possibility to redigest liquid digestate and/or digestate compost was evaluated using batch reactors. It could be shown that compost is an interesting substrate for AD that might be used for stabilization of the digestion process, e.g., in times of deteriorating reactor performance due to changes in quantity and quality of the feed material.

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Effect of a biogas-digestate and bentonite on some enzyme activities of the amended soils

Cited by 18 publications

References 2 publications

The Chemical Composition of Biogas Digestates Determines Their Effect on Soil Microbial Activity

The Chemical Composition of Biogas Digestates Determines Their Effect on Soil Microbial Activity

Ammonium Sorbed to Zeolite Is Partly Available to Wheat in the First Growth Cycle

Using Digestate Compost as a Substrate for Anaerobic Digestion

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