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| Titel |
Effect of inter-row cultivation on soil CO2 emission in a peach plantation |
| VerfasserIn |
E. Toth, Cs. Farkas, GY. Gelybo, I. Lagzi |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250070255
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| Zusammenfassung |
| We examined the effect of inter-row cultivation on soil CO2 emission in a peach plantation
planted in 1991. The soil is Ramann type brown forest soil /Mollic Cambisol/ developed on
sandy loam. Every second row in the orchard is covered with undisturbed grass, and every
other row is disked (depth: 12-15cm) with a two-three-week frequency. The humus content
varies from 1,69% to 2,28% in the upper 20 cm layer, where the sand, loam and clay contents
are 58%, 21% and 19 %, respectively. The average annual precipitation total is 570 mm (330
mm for the growing season) at the site.
During the vegetation period of 2009 soil CO2 emission measurements were carried out with
static chamber method in the differently managed rows. Parallel with CO2 measurements soil
volumetric water content and soil temperature were also determined. Soil microbiological
properties water-extractable organic carbon (WEOC) and water-extractable nitrogen (WEN)
as well as substrate-induced respiration (SIR) were determined from disturbed soil samples
collected on the first measurement day.
The measured soil physical properties showed that different soil management practices
influence soil water content, bulk density and soil temperature as well. Soil water content was
higher in the grass covered row on 10 of the 13 measurement days, the difference – which
reached 10 v% - was the highest on the warmest days. Soil temperature is also different in
case of disked and grass covered rows, found to be lower in the grass covered rows on every
measurement days. SIR, WEOC and WEN were all higher in the grass covered row (19.45 μg
CO2-C g-1 soil 36.91 μg g-1 soil, 139.36 μg g-1 soil, respectively) than in the disked row
(4.88 μg CO2-C g-1 soil 25.43 μg C g-1 soil, 61.25 μg N g-1 soil, respectively) in
2009.
Soil CO2 emission also differed between the two rows, grass covered rows produced higher
emission in all measurements days without exemption. The difference between CO2 fluxes
from the two cultivation methods were found to be statistically significant (p = 0.05) on each
measurement day, except for the two driest days according to soil water content data.
Nevertheless, soil emission data from the grass covered rows are more scattered due to the
greater spatiotemporal variability in the lack of disturbance. Homogenization is a well known
consequence of cultivation, which explains the moderate variation of emission in the disked
row. |
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