Effects of different starch structures on energy metabolism in pigs

Table 6 Effect of dietary starch structure on net energy of pig diet

Item	CON	AR					SEM	P-value
Item	CON	3.09	1.47	0.25	0.15	0.12	SEM	ANOVA	Linear	Quadratic
Final body energy, Mcal	47.25^abc	42.51^c	46.34^bc	46.96^abc	51.92^a	48.69^ab	0.78	0.016	0.003	0.005
Energy retention, Mcal	32.58^abc	27.84^c	30.67^bc	32.29^abc	37.25^a	34.12^ab	0.78	0.016	0.003	0.005
Energy retention of starch, Mcal	-	23.64^c	30.86^bc	32.03^abc	41.40^a	35.29^ab	1.68	0.010	0.003	0.005
DE, kcal/kg	3,519.12^a	3,184.36^d	3,219.62^d	3,382.29^c	3,447.86^b	3,405.30^bc	18.93	< 0.001	< 0.001	< 0.001
Total NE_m, Mcal¹	28.92	29.83	29.92	30.19	30.55	30.00	0.17	0.116	0.424	0.516
Total NE intake, Mcal²	61.50^ab	57.66^b	61.58^ab	62.48^ab	67.80^a	64.02^ab	0.92	0.040	0.008	0.012
Total feed intake, kg	25.68^b	25.62^b	26.98^ab	27.93^ab	29.36^a	28.14^ab	0.41	0.048	0.020	0.031
NE of diets, kcal/kg	2,399	2,260	2,291	2,247	2,313	2,274	22.95	0.465	0.772	0.949
NE of starch, kcal/kg³	-	2,138	2,195	2,112	2,236	2,162	43.98	0.923	0.775	0.950
RE of diets, kcal/kg	1,269^a	1,082^b	1,175^ab	1,156^ab	1,267^a	1,206^ab	19.01	0.029	0.013	0.024
RE of starch, kcal/kg	-	895.86^b	1,134.65^ab	1,136.23^ab	1,399.60^a	1,246.33^a	46.91	0.008	0.002	0.004

AR amylose/amylopectin ratio, CON Control group, DE Digestible energy, RE Retained energy
¹Total NE_m was calculated by multiplying the mean metabolic BW (kg^0.6) of each pig by 179 kcal and the number of days the pigs were fed experimental diets
²Total NE intake = energy retention plus total NE_m
³NE of starch = AR included at 53%; The NE of AR was calculated using the difference method by subtracting the NE contribution from the control diet from the NE of the diet containing AR
^a–c Means within a row with different superscripts significantly different (P < 0.05)

ISSN: 2049-1891