Bořivoj Šarapatka - eAGRI
Transcript of Bořivoj Šarapatka - eAGRI
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Soils of the Czech Republic: threat and protection
Bořivoj Šarapatka
Czech Society of Soil Science and
Palacký University Olomouc
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„Půda je nejsložitějším biomateriálem na planetě, ….. ……kterému dosud příliš nerozumíme, ….. “ „ Soil is the most complicated biomaterial on the planet ….. ……. which we do not understand properly …. “ (Young and Crawford, 2004: Interactions and Self-Organization in the Soil-Microbe Complex )
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2986
994 240
2664
1003
Land use balance 2013 (ha)
arable land
permanent grassland
other agricultural land
forest land
other non-agriculturalland
1053491 ha 23201 firms
45,4 ha average size of farm
2445185 ha 3573 firms
684,4 ha average size of farm
Use of agricultural land by different firms
legal…individ…
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Agricultural soil development from 1989 to 2013
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- Daily agricultural soil sealing (loss) in CZ – approx. 15 hectares
- 1990 – 2005 - agricultural soil loss - 53 700 hectares
- From 1966 to 2007 - loss - 235 thousand hectares
- From 1927 - 851 thousand hectares
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.
Total soil loss in CZ: 5 226 ha (2007)
- 15,0 % - housing
- 23,7 % - industry
- 25,5 % - mining
- 11,8 % - transportation
- 3,6 % - water construction
- 4,9 % - recreation and sport
- 7,8 % - afforestation
- 7,7 % - others
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- In the last decade of 20th century agricultural soil loss
in EU states was approx.1000 km2 per year, or 275 hectares
per day.
- From 2000 to 2006 - 920 km2 per year, 252 ha per day.
Daily losses:
Germany - 130 ha
Austria, Holland - 35 ha
Switzerland - 10 ha
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Qualitative damages of soils
Source: Šarapatka and Bednář, 2015
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Source: Šarapatka and Bednář, 2015
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Source: Šarapatka and Bednář, 2015
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10.4 % of arable land - problems with wind erosion
Source: VÚMOP
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45 % of agricultural land - problems with compaction
Source: VÚPOP
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Solids
Water
Air
Solids
Water
Air
Compressed
soil
Load
Soil
Matrix
gsoil (1) = WT1
VT1 gsoil (2) =
WT1
VT2
gsoil (2) > gsoil (1)
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Chernozems can accumulate
3500 m3 of water per hectare
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Acidification
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Understanding
Soil
Acidity
Brady and Weil (2002)
Neutral
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http://www.traylorchemical.com/images/faqs/phchart.jpg
Most nutrients
are highest
and most
toxins are
lower at
pH 5.5-7
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Source: ÚKZÚZ
Soil contamination
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Source: VÚMOP, MU
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Loss of organic matter
Source: VÚMOP
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Source: Brady and Weil, 2002
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Druh Doba
rozkladu
Kořínky 1–3 týdny
Zelené hnojení 1–4 měsíce
Posklizňové zbytky 3–30 měsíců
Fulvokyseliny 2–40 let
Huminové kyseliny 200–4 000 let
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54 % of arable land - problems with water erosion
Source: VÚMOP
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Soil erosion vs. average size of fields (in hectares)
0
5
10
15
20
25
r. 19
30
r.195
0
r.196
0
r.197
0
r.197
7
r.198
6SPÚ
r.199
3v
elik
os
t p
oze
mk
ů v
ha
Coluvisols development during
erosion processes
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South
Moravia –
very
productive
region
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Haná catchment
water erosion in t/ha/year
calculated for maize growing
Source: Šarapatka and Bednář, 2016
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Haná catchment
Agronomical and technical
measures against erosion
Source: Šarapatka and Bednář, 2016
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Water erosion in t/ha/year before and after measures
Source: Šarapatka and Bednář, 2016
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Assessment of soil erosion and deposition using 137Cs
The key assumption to use caesium-137 radionuclide as a erosion tracer is
finding of significant relationship between soil loss and radionuclide loss. Then
the spatial distribution of these radionuclides in the field can determine areas
of net soil loss (erosion) and net gain (deposition).
The assessment of 137Cs redistribution is based on a comparison of measured
inventories (137Cs total activity per area) of a individual sampling point in the
field with an reference inventory (stable site, without erosion/deposition).
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Average values of selected observed soil characteristics in
accumulation and erosion areas of slopes within the studied
block of land, the highlighted area shows the border of the
topsoil horizon.
Source: Šarapatka, Bednář, Netopil, 2015
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http://www.wunderground.com/blog/gardencoach/comment.html?entrynum=14
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Soil: a secret garden of beautiful microorganisms (http://www.denniskunkel.com/)
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Biomass of soil organisms
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International Decade of Soils (2015-2024)
IUSS President Prof. Rainer Horn took the opportunity to announce the
International Decade of Soils 2015 -2024, which was unilaterally declared by
IUSS, to keep the momentum and further increase soil awareness. IUSS will
seek the support of global organizations such as CGIAR, FAO, IAEA, UNEP
and others for this initiative. We kindly ask you to actively support us through
the channels at your disposal. We intend to provide a logo and other
information/dissemination materials in the near future.
FINISHED, BUT
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Soil Science Conference 2017 ???
Thanks for your attention