Minor effects of no-till treatment on GHG emissions of boreal cultivated peat soil.
| Title: | Minor effects of no-till treatment on GHG emissions of boreal cultivated peat soil. |
|---|---|
| Authors: | Honkanen, Henri1 (AUTHOR) henri.m.honkanen@luke.fi, Kekkonen, Hanna1 (AUTHOR), Heikkinen, Jaakko1 (AUTHOR), Kaseva, Janne1 (AUTHOR), Lång, Kristiina1 (AUTHOR) |
| Source: | Biogeochemistry. Apr2024, Vol. 167 Issue 4, p499-522. 24p. |
| Subject Terms: | *PEAT soils, *GREENHOUSE gases, *NO-tillage, *CARBON dioxide, *GROWING season, *NITROUS oxide, *MINORS |
| Abstract: | The greenhouse gas (GHG) emissions of spring cereal monoculture under long-term conventional tillage (CT) and no-till (NT) treatment established in 2018 were measured in a peatland in Southwestern Finland during the period 2018–2021. Nitrous oxide (N2O), carbon dioxide (CO2) and methane (CH4) fluxes were measured with chambers approximately every two weeks throughout the period under study. Net ecosystem exchange was measured during the growing seasons, and hourly ecosystem respiration (ER) and gross photosynthesis (GP) were modelled with empirical models. Across the whole period, annual emissions were 6.8 ± 1.2 and 5.7 ± 1.2 Mg CO2–C ha −1 yr−1 (net ecosystem carbon balance), 8.8 ± 2.0 and 7.1 ± 2.0 kg N2O–N ha−1 yr−1, and − 0.43 ± 0.31 and − 0.40 ± 0.31 kg CH4-C ha−1 yr−1 for CT and NT, respectively. The global warming potential was lower in NT (p = 0.045), and it ranged from 26 to 34 Mg CO2 eq. ha−1 yr−1 in CT and from 19 to 31 Mg CO2 eq. ha−1 yr−1 in NT. The management effect on the rates of single GHGs was not consistent over the years. Higher GP was found in CT in 2019 and in NT in 2020. Differences in ER between treatments occurred mostly outside the growing season, especially after ploughing, but the annual rates did not differ statistically. NT reduced the N2O emissions by 31% compared to CT in 2020 (p = 0.044) while there were no differences between the treatments in other years. The results indicate that NT may have potential to reduce slightly CO2 and N2O emissions from cultivated peat soil, but the results originate from the first three years after a management change from CT to NT, and there is still a lack of long-term results on NT on cultivated peat soils. [ABSTRACT FROM AUTHOR] |
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| Items | – Name: Title Label: Title Group: Ti Data: Minor effects of no-till treatment on GHG emissions of boreal cultivated peat soil. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Honkanen%2C+Henri%22">Honkanen, Henri</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> henri.m.honkanen@luke.fi</i><br /><searchLink fieldCode="AR" term="%22Kekkonen%2C+Hanna%22">Kekkonen, Hanna</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Heikkinen%2C+Jaakko%22">Heikkinen, Jaakko</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kaseva%2C+Janne%22">Kaseva, Janne</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lång%2C+Kristiina%22">Lång, Kristiina</searchLink><relatesTo>1</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Biogeochemistry%22">Biogeochemistry</searchLink>. Apr2024, Vol. 167 Issue 4, p499-522. 24p. – Name: Subject Label: Subject Terms Group: Su Data: *<searchLink fieldCode="DE" term="%22PEAT+soils%22">PEAT soils</searchLink><br />*<searchLink fieldCode="DE" term="%22GREENHOUSE+gases%22">GREENHOUSE gases</searchLink><br />*<searchLink fieldCode="DE" term="%22NO-tillage%22">NO-tillage</searchLink><br />*<searchLink fieldCode="DE" term="%22CARBON+dioxide%22">CARBON dioxide</searchLink><br />*<searchLink fieldCode="DE" term="%22GROWING+season%22">GROWING season</searchLink><br />*<searchLink fieldCode="DE" term="%22NITROUS+oxide%22">NITROUS oxide</searchLink><br />*<searchLink fieldCode="DE" term="%22MINORS%22">MINORS</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The greenhouse gas (GHG) emissions of spring cereal monoculture under long-term conventional tillage (CT) and no-till (NT) treatment established in 2018 were measured in a peatland in Southwestern Finland during the period 2018–2021. Nitrous oxide (N2O), carbon dioxide (CO2) and methane (CH4) fluxes were measured with chambers approximately every two weeks throughout the period under study. Net ecosystem exchange was measured during the growing seasons, and hourly ecosystem respiration (ER) and gross photosynthesis (GP) were modelled with empirical models. Across the whole period, annual emissions were 6.8 ± 1.2 and 5.7 ± 1.2 Mg CO2–C ha −1 yr−1 (net ecosystem carbon balance), 8.8 ± 2.0 and 7.1 ± 2.0 kg N2O–N ha−1 yr−1, and − 0.43 ± 0.31 and − 0.40 ± 0.31 kg CH4-C ha−1 yr−1 for CT and NT, respectively. The global warming potential was lower in NT (p = 0.045), and it ranged from 26 to 34 Mg CO2 eq. ha−1 yr−1 in CT and from 19 to 31 Mg CO2 eq. ha−1 yr−1 in NT. The management effect on the rates of single GHGs was not consistent over the years. Higher GP was found in CT in 2019 and in NT in 2020. Differences in ER between treatments occurred mostly outside the growing season, especially after ploughing, but the annual rates did not differ statistically. NT reduced the N2O emissions by 31% compared to CT in 2020 (p = 0.044) while there were no differences between the treatments in other years. The results indicate that NT may have potential to reduce slightly CO2 and N2O emissions from cultivated peat soil, but the results originate from the first three years after a management change from CT to NT, and there is still a lack of long-term results on NT on cultivated peat soils. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Biogeochemistry is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1007/s10533-023-01097-w Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 24 StartPage: 499 Subjects: – SubjectFull: PEAT soils Type: general – SubjectFull: GREENHOUSE gases Type: general – SubjectFull: NO-tillage Type: general – SubjectFull: CARBON dioxide Type: general – SubjectFull: GROWING season Type: general – SubjectFull: NITROUS oxide Type: general – SubjectFull: MINORS Type: general Titles: – TitleFull: Minor effects of no-till treatment on GHG emissions of boreal cultivated peat soil. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Honkanen, Henri – PersonEntity: Name: NameFull: Kekkonen, Hanna – PersonEntity: Name: NameFull: Heikkinen, Jaakko – PersonEntity: Name: NameFull: Kaseva, Janne – PersonEntity: Name: NameFull: Lång, Kristiina IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 04 Text: Apr2024 Type: published Y: 2024 Identifiers: – Type: issn-print Value: 01682563 Numbering: – Type: volume Value: 167 – Type: issue Value: 4 Titles: – TitleFull: Biogeochemistry Type: main |
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