The addition of lysolecithin to broiler diets improves growth performance across fat levels and sources: a meta-analysis of 33 trials

Figures & data

Table 1. Experimental design of trials used in the analysis.

Trial design	Trial	Study year	Study location	Replicates/treatment	Birds/treatment	Trial duration	Diet density^1	Dietary added fat removed in reformulation, %
On top	1	2005	Australia	6	48	42	2	-
	2	2005	Australia	6	48	42	2	-
	3	2007	Australia	6	48	42	2	-
	4	2007	Australia	6	48	42	2	-
	5	2011	Poland	10	80	42	2	-
	6	2011	Taiwan	8	80	40	1	-
	7	2012	Romania	10	80	42	2	-
	8	2013	US	7	350	42	3	-
	9	2013	US	7	350	42	2	-
	10	2013	US	7	440	38	2	-
	11	2014	Greece	10	200	42	2	-
	12	2014	New Zealand	8	120	35	2	-
	13	2016	Greece	8	136	42	2	-
	14	2016	Greece	8	136	42	2	-
	15	2016	Romania	8	72	42	1	-
	16	2017	UK	10	350	42	1	-
Reformulation	17	2010	Philippines	4	14 300	35	3	55
	18	2011	Poland	10	80	42	2	117
	19	2011	Taiwan	8	80	40	2	62
	20	2012	Romania	10	80	42	3	53
	21	2013	Netherlands	3	3000	41	2	40
	22	2013	Russia	5	245 000	41	2	45
	23	2014	Greece	10	200	42	2	66
	24	2014	Lebanon	3	4845	36	2	30
	25	2014	Lebanon	3	5100	37	2	30
	26	2014	Lebanon	33	5100	36	2	41
	27	2014	New Zealand	8	120	35	3	100
	28	2015	Greece	5	25 000	41	2	42
	29	2016	Greece	8	136	42	2	80
	30	2016	Greece	8	136	42	2	80
	31	2016	Romania	8	72	42	2	80
	32	2016	Thailand	5	30	42	2	100
	33	2017	UK	10	350	42	3	100

¹Dietary density categorised as follows: diets with energy <3100 kcal/kg were assigned a density category of 1, diets with 3100 to 3200 kcal/kg were assigned a density category of 2, and diets with >3200 kcal/kg were assigned a density category of 3.

Table 2. Dataset descriptions for trials used in this analysis.

	On Top	Reformulation
N trials, total	16	17
Dietary Main Grain, N trials
Corn/Soya	6	7
Wheat/Corn/Soya	6	7
Complex^1	1	2
Wheat/Soya	3	1
Fat Source, N trials
1 (Tallow, Palm)	6	5
2 (Poultry, Animal)	4	1
3 (Vegetable Oils)	2	7
4 (Blends)	4	4
LCL dose, N treatment means
125 g/t	5	8
250 g/t	11	9
% added fat, control diets
Mean	3.99	4.19
Min	1.15	2.50
Max	5.60	7.00
U:S ratio, control diets
Mean	2.21	3.57
Min	0.94	0.89
Max	5.01	7.65
Energy reduction between control and supplemented diets, kcal
Mean	0	65.94
Min	0	30
Max	0	117

¹Complex diets consist of 4 or more basal dietary ingredients in the formulation

Table 3. Effect of lysolecithin supplementation on whole life growth performance in broiler chickens.

		ADG, g	ADFI, g	FCR	FCRc^1	Energy Recovered, kcal
On Top	0 g LCL/t	63.59	100.36	1.623^a	1.599^a	0.00^b
	125 g LCL/t	64.22	109.86	1.608^ab	1.581^ab	52.73^ab
	250 g LCL/t	63.72	99.38	1.601^b	1.576^b	69.79^a
	SEM	2.263	4.333	0.031	0.034	16.629
	P-value	0.3784	0.2031	0.0273	0.0516	0.0446
Reformulation	0 g LCL/t	61.97	103.06	1.672	1.672	0.00^b
	125 g LCL/t	61.49	101.83	1.669	1.674	60.17^a
	250 g LCL/t	61.02	102.37	1.671	1.680	52.98^a
	SEM	1.924	2.947	0.026	0.040	12.653
	P-value	0.0672	0.3649	0.956	0.7099	0.0208

^a,bValues within a column sharing superscripts are not significantly different at P < 0.05

¹FCRc = FCR standardised to 2.5 kg BW

Figure 1. Forest plot demonstrating the effect of on top lysolecithin supplementation in broiler diets on FCR standardised at 2.5 kg BW.