. 2023 Aug 28;36(12):1869–1879. doi: 10.5713/ab.23.0212

Table 4.

Apparent total tract digestibility (ATTD) of nutrients, and nitrogen retention (NR) of soybean meal in pigs¹⁾ fed soybean meal diets with and without selected feed enzymes supplemented individually or combined

Item²⁾	Treatment³⁾								SEM	p value

	CON	Phy	Pro	Xyl	Phy+Pro	Phy+Xyl	Xyl+Pro	Phy+Xyl+Pro
Soybean meal diet
ATTD of DM (%)	90.3^d	92.1^abcd	93.8^abc	91.7^bcd	94.4^ab	94.6^a	90.1^d	91.1^cd	1.1	0.001
DE (kcal/kg)	3,402^b	3,419^ab	3,438^a	3,415^ab	3,436^a	3,443^a	3,397^b	3,405^ab	14	0.030
ME (kcal/kg)	3,296	3,291	3,323	3,310	3,347	3,336	3,291	3,298	20	0.240
ATTD of N (%)	88.2^abcd	88.0^bcd	89.2^a	87.7^cd	89.0^ab	88.8^abc	87.3^d	88.1^abcd	0.6	0.021
NR (%)	74.3	67.4	66.2	74.5	75.2	74.1	70.8	74.6	3.2	0.162
ATTD of ash (%)	67.5^bc	69.9^ab	68.3^bc	68.4^bc	72.1^a	71.9^a	66.2^c	69.0^abc	1.5	0.007
ATTD of Ca (%)	73.5^bc	77.5^a	73.8^bc	73.8^bc	78.5^a	77.9^a	72.4^c	76.8^ab	1.5	0.002
ATTD of P (%)	70.0^c	76.6^a	69.7^c	71.5^bc	74.0^ab	74.5^ab	68.6^c	70.2^bc	2.7	0.003
Soybean meal
ATTD of DM (%)	92.4^d	94.2^abcd	95.9^abc	93.8^bcd	96.6^ab	96.8^a	92.3^d	93.3^cd	1.1	0.001
DE (kcal/kg)	3,427^b	3,425^b	3,479^a	3,440^ab	3,477^a	3,478^a	3,421^b	3,430^ab	21	0.030
ME (kcal/kg)	3,304	3,268	3,344	3,317	3,376	3,351	3,296	3,306	29	0.108
ATTD of N (%)	88.6^abc	87.7^c	89.7^a	87.9^bc	89.5^a	89.1^ab	87.6^c	88.4^abc	0.6	0.010
NR (%)	74.9	66.0	68.2	74.5	76.3	74.3	70.8	75.2	3.4	0.165
ATTD of ash (%)	50.9^bc	54.4^ab	52.0^bc	52.1^bc	57.8^a	57.4^a	48.9^c	53.2^abc	2.2	0.007
ATTD of Ca (%)	36.2^bc	45.9^a	36.9^bc	36.8^bc	48.2^a	46.6^a	33.6^c	44.2^ab	3.7	0.002
ATTD of P (%)	55.5^B	62.4^A	54.3^B	58.1^AB	57.5^AB	60.4^AB	54.0^B	53.3^B	4.2	0.098

SEM, standard error of the mean; ATTD of DM, apparent total tract digestibility of dry matter; DE, digestible energy; ME, metabolizable energy; ATTD of N, apparent total tract digestibility of nitrogen; NR, nitrogen retention; ATTD of ash, apparent total tract digestibility of ash; ATTD of Ca, apparent total tract digestibility of calcium; ATTD of P, apparent total tract digestibility of phosphorus.

¹⁾

Each least squares mean represents 4×4 Latin square replicated pens; 16 pigs were used in this experiment.

²⁾

The values were calculated as dry matter basis.

³⁾

CON, control treatment with no enzyme supplementation; Phy, Ronozyme Hiphos (DSM, Parsippany, NJ, USA), 100 mg/kg (1,000 FTU/kg feed); Pro, Ronozyme WX (DSM, Parsippany, NJ, USA), 200 mg/kg (200 FXU/kg feed); Xyl, Ronozyme ProAct (DSM, Parsippany, NJ, USA), 200 mg/kg (15,000 PRO/kg feed); Phy+Pro, combination of phytase and protease; Phy+Xyl, combination of phytase and xylanase; Xyl+Pro, combination of xylanase and protease; Phy+Xyl+Pro, combination of phytase, xylanase, and protease.

^a–d

Within a row, means without a common superscript letter differ (p<0.05).

^A,B

Within a row, means without a common superscript letter differ (0.05≤p<0.10).