The effect of the ratio of standardized ileal digestible lysine to metabolizable energy on growth performance, blood metabolites and hormones of lactating sows

Table 3 The effect of dietary ME level on sow body weight change in lactation (Exp. 1)

Item	Parity	No.	ME level, Mcal/kg								P-value
			3.06	3.16	3.20	3.25	3.30	3.40	Mean¹³	SEM	Treat	Linear	Quadratic
Initial sow body weight, kg	1	36	202.6	208.9	205.8	209.4	201.6	214.3	206.8^x	6.0	0.70	--	--
	2	36	235.3	231.9	222.6	224.2	239.0	214.1	227.3^y	7.7	0.19	--	--
	3+	113	273.8	264.1	277.6	274.6	274.2	279.9	274.0^z	5.8	0.51	--	--
	Overall²	185	255.9	252.7	256.6	255.9	257.5	258.5	256.2	6.5	0.91	--	--
Sow body weight at weaning, kg	1	36	178.5	185.3	188.4	190.5	181.9	194.3	186.3^x	6.1	0.48	0.12	0.87
	2	36	217.2	211.8	207.7	210.2	223.5	196.0	210.7^y	7.8	0.19	0.20	0.39
	3+	113	258.6	250.2	264.1	260.7	260.0	264.4	259.6^z	6.0	0.61	0.32	0.73
	Overall²	185	238.7	236.4	242.3	241.3	242.3	241.9	240.5	6.9	0.83	0.80	0.91
Sow body weight change, kg¹	1	36	-24.3^a	-23.5^ac	-17.5^b	-18.8^bc	-20.0^ab	-19.7^ab	-19.7^x	1.9	0.06	0.07	0.08
	2	36	-18.0^ab	-20.0^a	-14.9^bc	-14.0^bc	-15.4^bc	-18.2^ab	-16.2^y	1.6	0.07	0.51	0.07
	3+	113	-15.2	-13.6	-13.6	-13.9	-14.2	-15.7	-14.8^y	1.0	0.65	0.80	0.10
	Overall²	185	-17.2^a	-16.3^ab	-14.3^b	-14.6^bc	-15.2^ab	-16.6^ac	-15.7	0.9	0.06	0.56	0.01

¹Initial sow body weight was used as a covariate in the analysis
²Parity effect was included in the model
³Parity effect; treatment effect was included in the model
^{a, b, c}Within a row, values with no common superscript differ significantly (P < 0.05)
^{x, y, z}Within a column, values with no common superscript differ significantly (P < 0.05)

ISSN: 2049-1891