Utilization of distillers dried grains with solubles and phytase in sow lactation diets to meet the phosphorus requirement of the sow and reduce fecal phosphorus concentration1

Abstract

Two experiments were completed to determine the potential for using distillers dried grains with solubles (DDGS) in diets with or without phytase to provide available P, energy, and protein to highly productive lactating sows without increasing their fecal P. In Exp. 1, the dietary treatments were as follows: (1) corn and soybean meal with 5% beet pulp (BP) or (2) corn and soybean meal with 15% DDGS (DDGS). Besides containing similar amounts of fiber, diets were isonitrogenous (21% CP, 1.2% Lys) and isophosphorus (0.8% P). Sixty-one sows were allotted to dietary treatments at approximately 110 d of gestation (when they were placed in farrowing crates) based on genetics, parity, and date of farrowing. Sows were gradually transitioned to their lactation diet. On d 2 of lactation, litters were cross-fostered to achieve 11 pigs/litter. Sows and litters were weighed on d 2 and 18. Fecal grab samples were collected on d 7, 14, and 18 of lactation. Dietary treatment did not affect the number of pigs weaned (10.9 vs. 10.8) or litter weaning weight. On d 14, DDGS sows had less fecal P concentration than BP sows (28.3 vs. 32.8 mg/g; P = 0.04). Fecal Ca of sows fed DDGS decreased for d 7, 14, and 18 (55.6, 51.4, and 47.1 mg/g of DM, respectively; P = 0.05) but not for BP sows. In Exp. 2, the dietary treatments were as follows: (1) corn and soybean meal (CON), (2) CON + 500 phytase units of Natuphos/kg diet, as fed (CON + PHY), (3) corn and soybean meal with 15% DDGS and no phytase (DDGS), or (4) DDGS + 500 FTU of Natuphos/kg of diet, as fed (DDGS + PHY). Sows (n = 87) were managed as described for Exp 1. Litter BW gain (46.0, 46.3, 42.1, and 42.2 kg; P = 0.25) and sow BW loss (8.1, 7.2, 7.4, and 6.3 kg for CON, CON + PHY, DDGS, and DDGS + PHY, respectively; P = 0.97) were not affected by dietary treatment. Fecal P concentration did not differ among dietary treatments but was reduced at d 14 and 18 compared with d 7 (P = 0.001). However, fecal phytate P concentration was decreased by the addition of DDGS when DDGS and DDGS + PHY were compared with the CON sows except on d 7 (P < 0.05). Sows fed CON diet had greater fecal phytate P than sows fed DDGS, and sows fed DDGS + PHY had less fecal phytate P than sows fed DDGS with no phytase (P = 0.001). Although these experiments were only carried out for 1 lactation, these results indicate that highly productive sows can sustain lactation performance with reduced fecal phytate P when fed DDGS and phytase in lactation diets.

The influence of microbial phytase supplementation to diets with high or low native phytase activity on sow reproductive traits and composition of colostrum and milk

“…The results of some experiments have shown, however, analogically with trials on growing pigs, a beneficial effect of this enzyme on the digestibility of some nutrients and on the performance of these animals (Kemme et al, 1997;Jongbloed et al, 2004). It should be stressed that in almost all of the experiments on sows, the effect of phytase additive was examined when typical maize-soyabean meal diets, poor in intrinsic phytase, were fed (Hill et al, 2008). There are few studies concerning the effectiveness of microbial phytase in sow diets containing a high level of intrinsic phytase.…”

Effects of beet pulp supplementation on growth performance, fecal moisture, serum hormones and litter performance in lactating sows

“…However, Hill et al . () reported that sows fed a basal diet with 5% beet pulp or a basal diet with 15% distillers dried grains with solubles had similar bodyweight loss during the lactation period. In our study, no differences were found in BW loss during the lactation period.…”

The Influence of Distillers Dried Grains with Solubles During Gestation on Sow Productivity and Milk Composition

“…In the same way, Monegue and Cromwell (1995) reported BW lost of 10 or 8 kg when diets contained 400 or 800 g DDGS/kg (the old type, lower in digestible and metabolisable energy, lower in digestible Distillers dried grains in pregnant sows amino acids, and lower in available phosphorus than DDGS produced in modern), respectively, during lactation in sows. Hill et al (2008) reported that sows fed soybean meal with 50 g beet pulp (BP)/kg or maize and soybean meal with 150 g DDGS/kg dietary lost 6.18 kg (BP) and 8.04 kg (DDGS), respectively, during the lactation period. In addition, all sows in both the control and DDGS treatment groups lost BW during lactation.…”