Pigs receiving daily tailored diets using precision-feeding techniques have different threonine requirements than pigs fed in conventional phase-feeding systems

Remus, Aline; Hauschild, Luciano; Corrent, Etienne; Létourneau-Montminy, Marie-Pierre; Pomar, Candido

doi:10.1186/s40104-019-0328-7

Journal of Animal Science and Biotechnology

Table 4 Plasma free amino acid concentrations of growing barrows pigs (25 to 42 kg body weight) fed different levels of threonine (70%, 85%, 100%, 115%, and 130% of the ideal threonine:lysine ratio of 0.65) in an individual precision-feeding (IPF) system or a group phase-feeding (GPF) system

From: Pigs receiving daily tailored diets using precision-feeding techniques have different threonine requirements than pigs fed in conventional phase-feeding systems

Parameters	IPF					GPF						P-value^b
Parameters	70	85	100	115	130	70	85	100	115	130	MSE^a	Thr	FS	Thr × FS
Number of observations	10	8	11	10	10	11	10	11	11	11
Essential amino acids, μmol/L
Arginine	215.26	210.37	222.60	212.17	208.10	216.69	226.5	217.58	195.36	210.64	18.40	0.87	0.98	0.92
Histidine	54.23	41.64	39.29	44.31	30.26	58.55	45.08	33.79	35.65	35.50	4.05	< 0.001^e	0.92	0.18
Isoleucine	89.37	78.62	93.25	82.33	88.10	84.62	85.85	82.43	83.39	83.93	5.35	0.67	0.43	0.37
Leucine	148.46	159.01	169.55	166.34	155.39	154.52	153.0	153.95	156.69	157.46	7.62	0.27	0.18	0.25
Lysine	136.93	80.90	75.53	59.26	76.68	125.19	70.60	64.79	62.92	64.32	11.86	< 0.001^d	0.17	0.89
Methionine	58.56	51.48	47.48	48.34	51.24	46.68	46.42	44.62	51.22	40.38	4.71	0.44	0.04	0.37
Phenylalanine	64.69	70.51	61.73	58.04	61.18	58.25	59.41	59.03	63.69	62.14	3.66	0.69	0.19	0.12
Threonine	50.61	93.59	133.52	245.22	256.03	42.70	93.98	157.41	235.81	258.58	19.75	< 0.001^c	0.87	0.89
Tryptophan	46.20	41.19	43.72	39.76	39.57	44.84	41.96	40.98	41.36	42.52	2.76	0.21	0.87	0.72
Valine	242.59	238.27	261.83	249.92	239.29	250.49	226.3	239.95	247.28	253.52	10.37	0.34	0.63	0.30
Non-essential amino acids, μmol/L
Alanine	437.05	468.17	390.13	446.80	490.21	423.24	413.6	404.66	451.39	419.79	28.47	0.15	0.14	0.37
Asparagine	39.87	40.07	42.51	42.70	41.25	40.86	40.77	42.00	40.47	41.52	3.75	0.94	0.93	0.98
Aspartic acid	11.57	13.91	13.14	15.50	14.86	12.77	13.22	14.47	12.80	13.77	1.30	0.37	0.59	0.37
Cysteine	193.73	189.57	204.18	200.91	211.29	195.79	200.8	207.32	195.66	201.82	7.36	0.17	0.93	0.54
Glutamate	163.27	217.79	207.69	235.01	238.14	207.22	200.5	214.63	203.51	225.17	20.14	0.12	0.85	0.26
Glutamine	452.58	483.11	490.92	491.77	485.81	438.95	478.8	500.46	533.40	477.22	31.74	0.06^‡	0.74	0.76
Glycine	967.1	1116.3	990.8	1028.5	1108.8	939.9	914.6	1037.9	1060.6	1112.0	16.78	0.07^c	0.40	0.18
Homocysteine	19.72	20.42	22.07	22.29	25.53	18.15	20.44	24.24	22.15	21.70	2.24	0.08^c	0.58	0.58
Proline	185.7	194.93	183.91	206.57	197.87	186.82	180.70	188.69	198.42	187.42	10.56	0.09^c	0.22	0.60
Serine	93.00	103.71	99.89	111.67	108.68	86.12	93.51	98.25	98.64	108.81	4.97	< 0.001^c	0.02	0.44
Tyrosine	67.24	64.18	55.65	63.62	59.75	66.12	62.22	59.40	59.41	55.32	3.79	0.03^c	0.45	0.74

^aMSE, maximum standard error
^bThr, level of threonine; FS, feeding system; L × Thr, interaction between level of threonine and feeding system; ^clinear effect for Thr; ^dquadratic effect for Thr; ^ecubic effect for Thr

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ISSN: 2049-1891

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