Efficacy of xylanase and β-glucanase in sows fed wheat-barley-based diet

Abstract Text:

Sow body weight losses during lactation is one of the most important parameters related to its reproductive life and longevity. Forty-eight gestation sows (initial BW 256.9 ± 24.0 kg; parity 3.6 ± 0.24), and their resulting piglets were used to evaluate efficacy of carbohydrase containing a combination of xylanase (1,220 units/kg) and β-glucanase (152 units/kg; Axtra^TM XB; DuPont Industrial Biosciences-Danisco Animal Nutrition, UK) in wheat-based diet in gestation, lactation and litter performance. Sows were weighed individually, and back-fat thickness measured on d 93 of gestation, a day after farrowing, and at weaning (d 18 of lactation). Sows were randomly assigned to one of two dietary treatments (0 or 100 g XB/metric ton of feed) from d 93 of gestation and throughout lactation. Basal diet was formulated to contain 2,263 kcal/kg NE, 15.4% NDF, 6.40 ADF%, 0.96% Lys, 0.24% Met and 0.60% Thr. Feed intake of sows was recorded daily and effect of dietary treatments on litter performance evaluated at farrowing and weaning. The data were analyzed as a completely randomized design using the GLM procedure of SAS. The model includes parity, farrowing Group, enzyme and their interaction. The sow and the litter was the experimental unit and statistical significance set at P ≤ 0.05. Dietary treatments did not affect (P>0.05) sow ADFI, litter weight and ADG of piglets. However, compared with control, sows fed XB lost less (P= 0.04) BW during lactation -0.22 vs -8.4kg.  The differences in the lactation associated body weight loss, combined with similar performance for the litters and BF thickness of sows indicate that the added carbohydrase containing xylanase and β-glucanase combination improved the efficiency with which sows translates ingested nutrients (energy and protein) into milk components, and thereby preventing sows body protein loss associated with lactation. 

 

Carbohydrase supplementation on sow performance
	XB, g/metric ton			P - Values
	0	100	SEM	XB	XB x Parity	Group	Parity
Parity	3.6	3.6	0.24
Sow BW before farrowing, kg	264.9	256.6	4.86	0.24	0.89	0.68	0.02
Sow BW at Farrowing, kg	247.8	237.7	4.62	0.12	0.99	0.36	<0.01
Sow BW at weaning, kg	239.3	237.2	4.69	0.75	0.98	0.45	<0.01
Body weight change, kg	-8.40a	-0.22b	2.66	0.04	0.38	0.79	0.41
Back fat change, kg	-2.56	-2.51	0.41	0.93	0.38	0.01	0.34
Lactation feed intake, kg	101.68	101.52	4.74	0.98	0.20	0.41	0.04
N, number of sows	24	24

^a,bMeans in the same row with different superscripts differ

Keywords: Enzyme, gestation, lactation, sow and litter performance