Seasonal CO2 emission under different cropping systems on Histosols in southern Sweden

Norberg, Lisbet; Berglund, Örjan; Berglund, Kerstin

doi:10.1016/j.geodrs.2016.06.005

Cited by 17 publications

(10 citation statements)

References 36 publications

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“…On plots with vegetation, the crop was cut prior to the measurements. Soil and plant (mainly root) respiration was measured in two ways: 1) using a portable infrared analyzer, where measurements were performed every 5 s over a period of 3-5 min (Norberg et al, 2016b); and 2) together with N 2 O and CH 4 , using vial sampling and gas chromatography. For days when both methods were used, CO 2 fluxes are presented as the mean of both methods.…”

Section: Depth [Cm]mentioning

confidence: 99%

Emissions of CO2, N2O and CH4 From Cultivated and Set Aside Drained Peatland in Central Sweden

Berglund

Kätterer

Meurer

2021

Front. Environ. Sci.

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Northern peatlands are important carbon (C) reservoirs, storing about one-third of the global terrestrial soil C pool. Anthropogenic influences, such as drainage for agriculture and forestry, lower the originally high groundwater level, leading to peat aeration and decomposition. This is particularly reflected in significant losses of CO2, while fluxes of N2O and CH4 are generally considered of minor importance for the overall greenhouse gas (GHG) balance of cultivated peatlands in Scandinavia. Setting land aside from agricultural production has been proposed as a strategy to reduce GHG emissions from drained peatland, restore natural habitats, and increase C sequestration. However, the evidence for this is rather scarce unless drainage is terminated. In this study, we measured respiration using dark automatic chambers, and CO2, N2O, and CH4 fluxes using manual static chambers, on: 1) cultivated peatland and 2) adjacent set-aside peatland in Central Sweden. The set-aside site was found to be a greater source of respiration than the cultivated site, while higher N2O fluxes and lower CH4 uptake rates were observed for the cultivated site. However, to compare the full GHG balance and assess the abandonment of drained cultivated peatland, additional measures, such as gross primary production (GPP) but also dissolved organic C losses would have to be taken into account.

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Section: Depth [Cm]mentioning

confidence: 99%

Emissions of CO2, N2O and CH4 From Cultivated and Set Aside Drained Peatland in Central Sweden

Berglund

Kätterer

Meurer

2021

Front. Environ. Sci.

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“…In this case it is probably wiser not to pay for mitigation but to recommend adapted cultivation practices to slow down the loss of organic matter and to retain the fertility of the soil. There is evidence that changing from annual to perennial cultivation can reduce the emissions significantly [16] although it is not clear from all datasets [10,17,18]. In the conditions of northern Europe, with a short growing season, other means of extending the vegetated period may be beneficial too but there is no research on the effects of, for example, cover crops or winter crops on organic soils.…”

Section: Introductionmentioning

confidence: 99%

Mapping of cultivated organic soils for targeting greenhouse gas mitigation

et al. 2019

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Cultivated organic soils can be a major source of GHG emissions in countries with high coverage of peat soils. Targeting mitigation measures based on mapping of cultivated organic soils would reduce these emissions and increase sustainability of agriculture. Different georeferenced datasets were combined to study the area trend and describe current agricultural use of organic soils. The area was also mapped regionally into classes based on intensity of cultivation and organic layer depth, and an example allocation of potential mitigation measures was made at the country scale. The area and proportion of cultivated organic soils have increased in Finland since 1990 but the clearance rate has decreased in recent years. More than half of the area retains a peat layer deeper than 0.6 m indicating long-lasting mitigation potential with measures capable of slowing peat decomposition. Sixty-five percent of the cultivated organic soil area was not considered a priority area for radical management changes, for various reasons, but there are 85,000 ha of field with more realistic potential for GHG mitigation. The mapping method was found to be a practical tool for depicting the GHG mitigation potential of cultivated organic soils. Significant reductions in agricultural GHG emissions can be expected with implementation of the suggested mitigation measures.

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“…Zhai et al [15] demonstrated that CO 2 emission from manured soils was higher under maize than under wheat, yet the emissions from mineral-fertilized soil were similar under both crops. Norberg et al [16] evidenced no significant differences in CO 2 emissions from soil under different crops in similar environmental conditions on 11 field sites in Sweden. CO 2 emissions from soil under maize are higher compared to the emissions from other crops [15,17].…”

Section: Introductionmentioning

confidence: 95%

CO2 Emissions from Soil Under Fodder Maize Cultivation

Sosulski¹,

Szymańska²,

Szara³

2020

Agronomy

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The paper presents the results of a study aimed at assessing the total respiration of arable soil under maize fodder cultivation in the climate conditions of Central Poland over the dry growing season. The study was carried out between 22 April and 30 September 2012 (24 test dates). Total CO2-C emissions from the soil were measured in situ by means of the chamber method. The measured total CO2-C fluxes showed a high variability over the study period (3.63–302.31, mean 84.58 mg CO2-C m−2 h−1). Cumulative CO2-C soil emissions reached 3214.9 kg CO2-C ha−1 during the maize growing season and 106.8 kg CO2-C ha−1 in the post-harvest month. In the specific weather conditions of the year of the study (summer drought), CO2-C fluxes from the soil were stronger correlated with the soil NO3−-N content than with atmospheric temperature and soil moisture. The relationship between total soil CO2-C emissions and soil NH4+-N content was described by a negative correlation. Intensive CO2-C fluxes from the soil coincided with rapid maize development stages (8–15 leaf stage) and, to a lower extent, with earlier leave development stages. Total CO2-C emissions during the emergence, pre-reproductive and reproductive maize stages and, particularly, in the post-harvest period, were lower. Intensive nitrification of the soil, in dry season such as the one of 2012, could serve as an indicator of high CO2-C emissions from the soil. However, further studies are needed to confirm this finding. Decomposers probably used soil NH4+-N in the organic matter degradation process intensively and could compete with nitrifiers and maize roots for this soil source of mineral nitrogen.

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Seasonal CO2 emission under different cropping systems on Histosols in southern Sweden

Cited by 17 publications

References 36 publications

Emissions of CO2, N2O and CH4 From Cultivated and Set Aside Drained Peatland in Central Sweden

Emissions of CO2, N2O and CH4 From Cultivated and Set Aside Drained Peatland in Central Sweden

Mapping of cultivated organic soils for targeting greenhouse gas mitigation

CO2 Emissions from Soil Under Fodder Maize Cultivation

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