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Responses of soil CO2 efflux and microbial activity to water deficit under conventional and adaptation technology
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SYSNO ASEP 0577940 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Responses of soil CO2 efflux and microbial activity to water deficit under conventional and adaptation technology Author(s) Dařenová, Eva (UEK-B) RID, ORCID, SAI
Holub, Petr (UEK-B) RID, ORCID, SAI
Bednařík, Adam (UEK-B) RID, ORCID, SAI
Klem, Karel (UEK-B) RID, ORCID, SAIArticle number 105856 Source Title Soil & Tillage Research. - : Elsevier - ISSN 0167-1987
Roč. 234, OCT (2023)Number of pages 11 s. Language eng - English Country NL - Netherlands Keywords Dehydrogenase activity ; dha ; Microbial carbon ; Rewetting ; Soil respiration ; Tillage Subject RIV DF - Soil Science OECD category Soil science R&D Projects EF16_019/0000797 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) QK23020080 GA MZe - Ministry of Agriculture (MZe) Research Infrastructure CzeCOS IV - 90248 - Ústav výzkumu globální změny AV ČR, v. v. i. Method of publishing Limited access Institutional support UEK-B - RVO:86652079 UT WOS 001128544600001 EID SCOPUS 85167985795 DOI 10.1016/j.still.2023.105856 Annotation Frequent periods of low rainfall accompanying climate change are expected to affect many aspects of agricultural production and greenhouse gas emissions. In this work, we conducted field experiments on soil CO2 efflux and soil microbial activity using two precipitation treatments and two crop management technologies. While the control treatment was exposed to natural precipitation, the reduced water availability was induced during the early stages of crop growth using rain-exclusion shelters within the water deficit treatment. We aimed to test the difference in the response to water deficit between two management technologies: conventional tillage (CT ploughed without cover crops) and adaptation technology (AT no-till with species rich cover crops). After a month of simulated water deficit, the soil CO2 efflux under a regime of adaptation technology was essentially the same as that under the conventional technology, and the decrease in soil CO2 efflux ranged between 22 % and 55 %. The water deficit had a technology-specific effect on microbes. While no effect on the microbial carbon under CT was observed, the water deficit decreased Cmic under AT. In contrast, the opposite pattern was observed for DHA. When a normal soil water regime was restored, CO2 efflux recovered rapidly while recovery of microbial biomass and dehydrogenase activity was more variable. Generally, the soil microbial biomass and activity recovered better under AT. The results show that while the reduction in Rs during water deficit and its recovery after the restoration of the ambient precipitation regime were not affected by the technology, the response of microbial biomass and activity to water deficit depended on the technology with better recovery under AT. Workplace Global Change Research Institute Contact Nikola Šviková, svikova.n@czechglobe.cz, Tel.: 511 192 268 Year of Publishing 2024 Electronic address https://www.sciencedirect.com/science/article/pii/S0167198723002234?pes=vor
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