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Measurements of soil carbon dioxide emissions from two maize agroecosystems at harvest under different tillage conditions.

Giacomo G, Angelo F, Fabio B, Stefano B, Riccardo M - ScientificWorldJournal (2014)

Bottom Line: This result is likely due to decomposition of the organic litter left on the ground of the no-tillage site and thus to an increased microbial and invertebrate respiration.On the other hand, fuel consumption of conventional tillage technique is greater than no-tillage consumptions.For these reasons this result cannot be taken as general.

View Article: PubMed Central - PubMed

Affiliation: Department of Mathematics & Physics, Catholic University, via dei Musei 41, 25121 Brescia, Italy.

ABSTRACT
In this study a comparison of the soil CO2 fluxes emitted from two maize (Zea mays L.) fields with the same soil type was performed. Each field was treated with a different tillage technique: conventional tillage (30 cm depth ploughing) and no-tillage. Measurements were performed in the Po Valley (Italy) from September to October 2012, covering both pre- and postharvesting conditions, by means of two identical systems based on automatic static soil chambers. Main results show that no-tillage technique caused higher CO2 emissions than conventional tillage (on average 2.78 and 0.79 μmol CO2 m(-2) s(-1), resp.). This result is likely due to decomposition of the organic litter left on the ground of the no-tillage site and thus to an increased microbial and invertebrate respiration. On the other hand, fuel consumption of conventional tillage technique is greater than no-tillage consumptions. For these reasons this result cannot be taken as general. More investigations are needed to take into account all the emissions related to the field management cycle.

Show MeSH
Atmospheric turbulence (mean daily pattern) and CO2 fluxes in the postharvest period (September-October) at the NT site. (NT = no-tillage site.)
© Copyright Policy - open-access
Related In: Results  -  Collection


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fig8: Atmospheric turbulence (mean daily pattern) and CO2 fluxes in the postharvest period (September-October) at the NT site. (NT = no-tillage site.)

Mentions: The direct exposure to the atmosphere of the two studied soils after the harvest caused an increase of the air turbulence at ground level, which rose from negligible values under the canopy to appreciable values after its removal (Figure 8), following dynamics that also other works reported [49–51].


Measurements of soil carbon dioxide emissions from two maize agroecosystems at harvest under different tillage conditions.

Giacomo G, Angelo F, Fabio B, Stefano B, Riccardo M - ScientificWorldJournal (2014)

Atmospheric turbulence (mean daily pattern) and CO2 fluxes in the postharvest period (September-October) at the NT site. (NT = no-tillage site.)
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4228971&req=5

fig8: Atmospheric turbulence (mean daily pattern) and CO2 fluxes in the postharvest period (September-October) at the NT site. (NT = no-tillage site.)
Mentions: The direct exposure to the atmosphere of the two studied soils after the harvest caused an increase of the air turbulence at ground level, which rose from negligible values under the canopy to appreciable values after its removal (Figure 8), following dynamics that also other works reported [49–51].

Bottom Line: This result is likely due to decomposition of the organic litter left on the ground of the no-tillage site and thus to an increased microbial and invertebrate respiration.On the other hand, fuel consumption of conventional tillage technique is greater than no-tillage consumptions.For these reasons this result cannot be taken as general.

View Article: PubMed Central - PubMed

Affiliation: Department of Mathematics & Physics, Catholic University, via dei Musei 41, 25121 Brescia, Italy.

ABSTRACT
In this study a comparison of the soil CO2 fluxes emitted from two maize (Zea mays L.) fields with the same soil type was performed. Each field was treated with a different tillage technique: conventional tillage (30 cm depth ploughing) and no-tillage. Measurements were performed in the Po Valley (Italy) from September to October 2012, covering both pre- and postharvesting conditions, by means of two identical systems based on automatic static soil chambers. Main results show that no-tillage technique caused higher CO2 emissions than conventional tillage (on average 2.78 and 0.79 μmol CO2 m(-2) s(-1), resp.). This result is likely due to decomposition of the organic litter left on the ground of the no-tillage site and thus to an increased microbial and invertebrate respiration. On the other hand, fuel consumption of conventional tillage technique is greater than no-tillage consumptions. For these reasons this result cannot be taken as general. More investigations are needed to take into account all the emissions related to the field management cycle.

Show MeSH