Limits...
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

Related in: MedlinePlus

Six consecutive days of soil CO2 flux measurements in the two experimental sites. Each point represents the average of the fluxes measured by all the chambers of the SASSFLUX system at each site (3 chambers at NT site and 4 chambers at CT site) in a 15 min period. Vertical bars indicate the standard deviation of the chambers measurements in each 15 min period (CT = conventional tillage site; NT = no-tillage site). Points without vertical bars refer to 15 min periods in which only one chamber was running.
© Copyright Policy - open-access
Related In: Results  -  Collection


getmorefigures.php?uid=PMC4228971&req=5

fig3: Six consecutive days of soil CO2 flux measurements in the two experimental sites. Each point represents the average of the fluxes measured by all the chambers of the SASSFLUX system at each site (3 chambers at NT site and 4 chambers at CT site) in a 15 min period. Vertical bars indicate the standard deviation of the chambers measurements in each 15 min period (CT = conventional tillage site; NT = no-tillage site). Points without vertical bars refer to 15 min periods in which only one chamber was running.

Mentions: Figure 3 shows an example of one week of measurements at both sites in September. The measurement gaps were due to IRGA saturation conditions, particularly frequent at the NT site during the night.


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)

Six consecutive days of soil CO2 flux measurements in the two experimental sites. Each point represents the average of the fluxes measured by all the chambers of the SASSFLUX system at each site (3 chambers at NT site and 4 chambers at CT site) in a 15 min period. Vertical bars indicate the standard deviation of the chambers measurements in each 15 min period (CT = conventional tillage site; NT = no-tillage site). Points without vertical bars refer to 15 min periods in which only one chamber was running.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

fig3: Six consecutive days of soil CO2 flux measurements in the two experimental sites. Each point represents the average of the fluxes measured by all the chambers of the SASSFLUX system at each site (3 chambers at NT site and 4 chambers at CT site) in a 15 min period. Vertical bars indicate the standard deviation of the chambers measurements in each 15 min period (CT = conventional tillage site; NT = no-tillage site). Points without vertical bars refer to 15 min periods in which only one chamber was running.
Mentions: Figure 3 shows an example of one week of measurements at both sites in September. The measurement gaps were due to IRGA saturation conditions, particularly frequent at the NT site during the night.

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
Related in: MedlinePlus