LCA Food 2012 in Saint Malo, France! - Manifestations et colloques ...

GROUP 4, SESSION B: CROP PRODUCTION SYSTEMS 8 th Int. Conference on LCA in the
Agri-Food Sector, 1-4 Oct 2012
Table 1 Results for the studied Farm Management Units (FMUs) in 2011.
Yield
Area (kg ha
FMU (ha)
-
Water consumption
1
)
1 (m 3
ha -1 Energy consumption
)
2
Acc
(kWh)
3 . Acc
ETo
(mm)
3 .
Precip. WUE
(mm)
4
(kg m -3 EUE
)
5
(kg
kWh -1 )
Vineyard 4.2 11,935 2,040 2,859 838 93 4.36 4.17
Nectarine 12.5 44,780 5,424 3,300 897 272 5.86 13.57
Corn 70.0 14,286 6,750 3,000 595 81 1.96 4.76
1
The irrigation season for each crop was as follows: Vineyard (28 March to 26 Sept 2011; 26 weeks), Nectarine
(7 March to 31 Oct 2011; 34 weeks) and Corn (23 May to 12 Sept, 2011; 16 weeks). Irrigation uniformity
and application efficiency of the irrigation system was estimated from default values, with sprinklers in
the corn and drippers in the other two crops.
2
Energy consumption (kWh) was provided by the farms’ manager.
3
Weekly weather data (Precipitation and Reference ET) was gathered from nearby automatic monitoring
weather stations considering the irrigation season for each crop. Crop coefficients (kc = ETc/ETo) were obtained
from local extension agents.
4
Water Use Efficiency (WUE), considering applied water + effective precipitation.
5
Energy Use Efficiency (EUE), considering the energy used to pump the water.
Acknowledgements: This work was partially financed by the VALOR 2010 funding from the Generalitat de
Catalunya (Spain). We also would like to thank the valuable advice from Prof. Josep M. Villar (University of
Lleida). We also would like to thank the interest and the help from the farm managers.
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