J. Anim Sci.
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Published online first on March 14, 2008
J. Anim Sci. 1910. doi:10.2527/jas.2007-0338
© 2008 American Society of Animal Science
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J. Anim Sci., doi: 10.2527/jas.2007-0338
©Copyright, 2008, The American Society of Animal Science

ARTICLE

Evaluation of NutriDense low-phytate corn and added fat in growing and finishing swine diets

S. K. Linneen 1, J. M. DeRouchey 1*, R. D. Goodband 1, M. D. Tokach 1, S. S. Dritz 2, J. L. Nelssen 1, J. L. Snow 3

1 Department of Animal Sciences and Industry, Kansas State University, Manhattan, KS 66506-0201
2 Food Animal Health and Management Center, College of Veterinary Medicine, Kansas State University, Manhattan, KS 66506-0201
3 BASF Plant Science, Research Triangle Park, NC 27709-3528

* To whom correspondence should be addressed. E-mail: jderouch{at}ksu.edu.


  Abstract

Two experiments were conducted to evaluate the effects of NutriDense low-phytate corn in conjunction with increasing added dietary fat on growing and finishing pig performance. Diets in both experiments were corn-soybean meal-based diets with either yellow dent or NutriDense low-phytate corn and 0, 3, or 6% added choice white grease arranged in a 2 x 3 factorial. There were 25 to 28 pigs per pen and 7 pens (replications) per treatment in both experiments. In Exp. 1, a total of 1,162 gilts with an initial BW of 44.6 kg were used in a 28-d growth assay. A constant true ileal digestible (TID) Lys:ME ratio of 2.80 g/Mcal and available P:ME ratio of 0.90 g/Mcal were maintained in all treatment diets. Overall (d 0 to 28), there were no corn source x added fat interactions (P ≥ 0.79). Regardless of corn source, ADG and G:F increased (linear, P = 0.03) with increasing added fat. There were no differences (P ≥ 0.34) in pig growth performance between those fed NutriDense low-phytate and yellow dent corn. In Exp. 2, a total of 1,128 gilts with an initial BW of 81.6 kg were used in a 28-d growth assay. A constant TID Lys:ME ratio of 2.15 g/Mcal ME and available P:ME ratio of 0.75 g/Mcal were maintained in all treatment diets. Overall (d 0 to 28), there was a tendency (P = 0.07) for a corn source x added fat interaction in G:F, which can be explained by the improved G:F in pigs fed yellow dent corn only when 6% fat was added to the diet; whereas, G:F was improved at both 3 and 6% added fat in pigs fed NutriDense low-phytate corn. There were no differences (P ≥ 0.18) in growth performance between pigs fed NutriDense low-phytate and yellow dent corn. These results indicate that increasing added fat improved growth performance regardless of corn source. In addition, growth performance was similar for pigs fed either NutriDense low-phytate corn or yellow dent corn.

Key Words: growth, low-phytate corn, swine, yellow dent corn






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