23.5.2022
EN
Official Journal of the European Union
L 144/73
Table 11 Default values to be used in calculating NEwool for sheep and goats Parameter
Value
Source
EVwool - sheep
157 MJ kg- 1
NRC, 2007
Productionwool - sheep
7,121 kg
Average of the four values provided in Table 1 of ‘Application of LCA to sheep production systems: investigating co-production of wool and meat using case studies from major global producers (1).’
NEwool - sheep
3,063 MJ/d
Calculated using Eq.
14
NEwool - goat
2,784 MJ/d
Calculated from NEwool – sheep using Eq.
17
(1) Wiedemann et al, Int J. of LCA 2015.
Energy for milk, NEl
NEl =
net energy for lactation, MJ day-1.
Milk =
amount of milk produced, kg of milk day-1.
EVmilk =
the net energy required to produce 1 kg of milk.
A default value of 4.6 MJ/kg (AFRC, 1993) shall be used which corresponds to a milk fat content of 7% by weight.
Default values to be used for calculating NEl and the resulting net energy required are provided in Table 12.
Table 12 Default values to be used in calculating NEl for sheep and goat Parameter
Value
Source
EVmilk - sheep
4,6 MJ kg- 1
AFRC, 1993
Milk - sheep
2,08 kg/d
Estimated milk production 550 lbs of sheep milk per year (average value), milk production estimated for 120 days in one year.
NEl - sheep
9,568 MJ/d
Calculated using Eq.
15
NEl - goat
8,697 MJ/d
Calculated from NEl – sheep using Eq.
17
Energy for meat, NEg
NEg =
net energy needed for growth, MJ day-1.
WGlamb =
the weight gain (BWf – BWi), kg yr-1
BWi =
the live bodyweight at weaning, kg.
BWf =
the live bodyweight at 1-year old or at slaughter (live-weight) if slaughtered prior to 1 year of age, kg.
a, b =
constants as described in Table 13.