Combined biochar and manure addition to an agricultural soil benefits fertility, microbial activity, and mitigates manure-induced CO<sub>2</sub> emissions

TitleCombined biochar and manure addition to an agricultural soil benefits fertility, microbial activity, and mitigates manure-induced CO2 emissions
Publication TypeJournal Article
Year of Publication2024
AuthorsLebrun M., Zahid Z., Bednik M., Medynska-Juraszek A., Szakova J., Brtnicky M., Holatko J., Bourgerie S., Beesley L., Pohorely M., Macku J., Hnátková T., Trakal L.
JournalSoil Use and Management
Volume40
Pagination15
Date PublishedJan
Type of ArticleArticle
ISBN Number0266-0032
Accession NumberWOS:001133402900001
KeywordsAgriculture, amendments, carbon, carbon stability, CO2 emission, Compost, dynamics, functional diversity, IMPACT, manured biochar, microorganisms, nutrient leaching, Nutrients, Soil fertility, straw
Abstract

The importance of blending biochar into manure prior to its application as a soil amendment was investigated by this laboratory and field study, hypothesizing an (i) increase in soil fertility; (ii) improvement in microbial activity; (iii) reduction in manure-induced CO2 emissions after combining amendments. Biochar was mixed with manure (50:50 V/V) and aged in field conditions for 6 months whereafter pristine biochar, manure, and manured biochar (50:50 V/V) were incorporated into an agricultural drought-prone Regosol. All treatments and soil mixtures were incubated, with laboratory measurements of CO2 emissions taken using a coupled column respirometer set up, while nutrient availabilities as well as enzymatic activities were also tested. Demonstrable benefits of the biochar when blended to manure were exemplified in reduced CO2 emissions, by 60% compared with manure alone, and improved C and N acquisition by microorganisms. When applied to soil, blended biochar manure did not enhance CO2 emissions, but did significantly improve soil fertility by the avoidance of leaching of non-plant consumed nutrients from the soil (e.g. NO3- by 58%). A significant increase in functional diversity indices in the presence of manured biochar highlights the added value of the blended approach. Field application yielded reduced effects; manure induced a higher carbon and nitrogen mineralization (thus potentially higher C and N emissions via CO2, CH4 and N2O) as well as a higher microbial functional diversity. Further studies should verify the effects observed here in a range of soil types and climates.

Short TitleSoil Use Manage.Soil Use Manage.
Alternate JournalSoil Use Manage.
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Cited Reference Count: 64
Lebrun, Manhattan Zahid, Zubda Bednik, Magdalena Medynska-Juraszek, Agnieszka Szakova, Jirina Brtnicky, Martin Holatko, Jiri Bourgerie, Sylvain Beesley, Luke Pohorely, Michael Macku, Jan Hnatkova, Tereza Trakal, Lukas
Trakal, Lukas/U-2247-2017; Bourgerie, Sylvain/ABG-0185-2022; Holatko, Jiri/AAX-5624-2020; Brtnicky, Martin/I-4939-2018
Trakal, Lukas/0000-0002-1216-6206; Bourgerie, Sylvain/0000-0002-4535-6719; Holatko, Jiri/0000-0003-4156-4673; Lebrun, Manhattan/0000-0002-8528-3040; Beesley, Luke/0000-0003-0993-8997; Brtnicky, Martin/0000-0001-5237-722X
Ministry of Agriculture of the Czech Republic; Ministry of Education, Youth and Sports of the Czech Republic within project SWAMP [CZ.02.1.01/0.0/0.0/16_026/0008403]; [QK1910056]
This research was supported by the Ministry of Agriculture of the Czech Republic (project no. QK1910056) and the Ministry of Education, Youth and Sports of the Czech Republic within project SWAMP (CZ.02.1.01/0.0/0.0/16_026/0008403).

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Lebrun, M (corresponding author), Czech Univ Life Sci Prague, Fac Environm Sci, Dept Environm Geosci, Prague 16500 6, Czech Republic.
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