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

GROUP 6, SESSION B: METHODS, TOOLS, DATABASES 8 th Int. Conference on LCA in the
Agri-Food Sector, 1-4 Oct 2012
Table 1. Total greenhouse gas emissions for canola-wheat and chickpea-wheat production systems with different
levels of fertiliser N, i.e. zero (0N) or 80 kg N/ha (80N)
928
Pre-farm and on-farm
emissions year 1 (kg
CO2-e/ha)
Pre-farm and on-farm
emissions year 2 (kg
CO2-e/ha)
Rotation A
Total emissions per ha
over 2 years (kg CO2-e)
Canola (80N)–wheat
(80N)
896 908 1804
Chickpea
wheat (80N)
(0N)–
306 848 1154
Chickpea
wheat (0N)
(0N)–
306 297 603 B
A B
The canola and chickpea crops yielded 1.8 t/ha; the three wheat crops yielded 3.0 t/ha; Total emissions
from chickpea (0N)–wheat (0N) are 33% of those from canola (80N)–wheat (80N); using ecoinvent and the
Australasian LCI database updated May 2012.
Table 2. Sensitivity of the emissions profile for sheep enterprises to changes in enterprise from wool dominance
to the production of first-cross lambs
Total emis-
Value Value Value of
sions (kg
of wool of mut- lamb/live Enteric methane (kg CO2-e/kg
Enterprise type (%) ton (%) animal (%)
/ha)
greasy wool)
19-micron wool production 56 32 12 99.1 A 25.6
19-micron ewes joined to 30 11 60 94.0 + emissions from 15.5
Dorset rams for meat pro-
production of feed and
duction
replacement ewes
B,C
A Based on daily modelling for the 51-year long-term average period; B Includes emissions from the production
of wheat (0.157 kg CO2-e) and replacement ewes (2.29 kg CO2-e); C Emissions decreased by 39% due to
change in enterprise emphasis.
Figure 1. Greenhouse gas emissions (kg CO2-e) from the production of 1 tonne of wheat in Central Zone
(East) NSW, Australia.