. 2021 Jul 6;8:689012. doi: 10.3389/fvets.2021.689012

Table 4.

Environmental impacts at farm gate (per kilogram of body weight gain in fattening unit and per kilogram of pig live weight at farrow-to-finish farm gate).

Impacts at fattening unit gate (per kilogram of body weight gain)
	Control-diet	Eco-diet	Local-diet	RSD	Statistics
CC (kg CO₂-eq)	2.40^a	2.04^b	1.95^b	0.14	G^, S^, D^**
NRE (MJ)	19.06^a	17.30^b	12.82^c	0.19	G^*, S^, D^**
AC (molc H⁺-eq)	0.112^a	0.104^b	0.108^a	0.11	G^, S^, D^*
EU (g ${PO}_{4}^{3 -}$ -eq)	226^a	208^b	234^a	0.11	G^, S^, D^**
LO (m²year)	4.65^b	4.58^b	5.68^a	0.14	G^*, S^, D^**
PD (g P)	115^a	74^c	97^b	0.20	G, S^, D^*
Impacts at farm gate (per kilogram of body weight)
CC (kg CO₂-eq)	2.40^a	2.17^b	2.11^b	0.08	G^*, S^, D^**
NRE (MJ)	22.37^a	21.22^b	18.30^c	0.10	G^*, S^, D^***
AC (molc H⁺-eq)	0.085^a	0.080^b	0.083^a	0.08	G, S^, D^
EU (g ${PO}_{4}^{3 -}$ -eq)	198^a	186^b	203^a	0.08	G^, S^, D^**
LO (m²year)	4.33^b	4.28^b	4.99^a	0.1	G^, S^, D^**
PD (g P)	122^a	95^c	110^b	0.12	G^*, S^, D^**

CC, climate change; NRE, non-renewable and fossil energy demand; AC, acidification; EU, eutrophication; LO, land occupation; PD, P demand; G, gender; S, sire; D, diet; RSD, residual standard deviation;

^**

p < 0.01,

^***

p < 0.001;

^a,b,c

Means with different superscripts (a, b, c) are significantly different between the experimental diet (p < 0.05).