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Seasonal changes of CO2 emissions in tillage induced agroecosystem (CROSBI ID 598720)

Prilog sa skupa u zborniku | sažetak izlaganja sa skupa | međunarodna recenzija

Bilandžija, Darija ; Zgorelec, Željka ; Kisić, Ivica ; Mesić, Milan ; Jurišić, Aleksandra ; Šestak, Ivana Seasonal changes of CO2 emissions in tillage induced agroecosystem // Landslide and Flood Hazard Assessment. Abstract Proceedings of the 1st Regional Symposium on Landslides in the Adriatic-Balkan Region / Mihalić Arbanas, Snježana ; Arbanas, Željko (ur.). Zagreb: Grad Zagreb ; Ured za upravljanje u hitnim situacijama, 2013. str. 35-36

Podaci o odgovornosti

Bilandžija, Darija ; Zgorelec, Željka ; Kisić, Ivica ; Mesić, Milan ; Jurišić, Aleksandra ; Šestak, Ivana

engleski

Seasonal changes of CO2 emissions in tillage induced agroecosystem

Carbon dioxide (CO2) is the primary greenhouse gas (GHG) emitted throughout human activities which are responsible for the increase of carbon dioxide in the atmosphere since the industrial revolution and thereby causes the global warming. Soil carbon dioxide flux is very important flux within the global carbon cycle. To reduce the global temperature, Kyoto Protocol has been adopted in Kyoto in 1997, and Republic of Croatia has become the Kyoto Protocol Annex I country in 2007 by which has made a commitment to reduce the GHG emissions by 5% in the period between 2008 and 2012 compared to the base year (1990). One of the six sectors under the Kyoto Protocol, from which each country has to report their GHG emissions every year, is agricultural sector. Due to the lack of research on long term carbon dioxide emissions in tillage induced agroecosystem in the Republic of Croatia, the aim of our study is to determine the influence of different tillage treatments on soil carbon dioxide flux. Field experiment with six different tillage treatments common to this area was set up on Stagnic Luvisols in Daruvar (N 45º33´937´´, E 17º02´056´´), Central Croatia in 1994 with investigation goal on determination of soil degradation by water erosion and later, in 2011, expanded to the research on soil CO2 fluxes. Field experiment is characterised by continental climate. Tillage treatments differed in tools that were used, depth and direction of tillage. Tillage treatments were: check plot (black fallow) - BF, ploughing up/down the slope to 30 cm - PUDS, no-tillage - NT, ploughing across the slope to 30 cm - PAS, ploughing to 50 cm across the slope – VDPAS and subsoiling to 60 cm plus ploughing across the slope - SSPAS. Field measurements were conducted during one vegetation year (n=8), from May till October 2012, when cover crop was corn (Zea mays L.), the main arable crop in Croatia. Average precipitations at the experimental field in 2012 were 789 mm and average temperature was 11, 8oC. In situ measurements of accumulated carbon dioxide in closed static chambers were conducted with portable infrared carbon dioxide detector (GasAlertMicro5 IR, 2011). In this paper the results of field measurements of carbon dioxide fluxes during one vegetation year of corn are presented. The treatment with lowest measured fluxes of carbon dioxide was black fallow (treatment without cover crop - BF) where range of carbon dioxide flux varied from 17, 1 kg CO2/ha/day to 82, 8 kg CO2/ha/day and the average carbon dioxide flux at BF treatment was 38, 0 kg CO2/ha/day. Between the treatments with the corn, minimal average carbon dioxide flux was measured at ploughing up/down the slope to 30cm treatment (PUDS) where average CO2 flux was 70, 1 kg CO2/ha/day while maximal average carbon dioxide flux was measured at no-tillage treatment (NT) where mentioned average was 118, 8 kg CO2/ha/day. The smallest range of CO2 flux was measured at BF treatment but among the treatments with corn, smallest range has PUDS and the largest one NT treatment. The range of average carbon dioxide flux at PUDS treatment varied from 25, 7 kg CO2/ha/day to 128, 4 kg CO2/ha/day and the average carbon dioxide flux at NT treatment varied from 37, 1 kg CO2/ha/day to 241, 1 kg CO2/ha/day. After all mentioned, we can say that in these agroecosystem conditions, best tillage practice in terms of lowest carbon dioxide flux is ploughing up and down the slope to 30 cm although the lowest carbon dioxide flux was measured at treatment without any cover crop but further research is recommended.

soil respiration; CO2 flux; vegetation period; corn; Croatia

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Podaci o prilogu

35-36.

2013.

objavljeno

Podaci o matičnoj publikaciji

Landslide and Flood Hazard Assessment. Abstract Proceedings of the 1st Regional Symposium on Landslides in the Adriatic-Balkan Region

Mihalić Arbanas, Snježana ; Arbanas, Željko

Zagreb: Grad Zagreb ; Ured za upravljanje u hitnim situacijama

978-953-7479-28-2

Podaci o skupu

1st Regional Symposium on Landslides in the Adriatic-Balkan Region

predavanje

06.03.2013-09.03.2013

Zagreb, Hrvatska

Povezanost rada

Poljoprivreda (agronomija)