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Nutritional Evaluation of Triticale in Swine Starter and Grower Diets^{1 ,2,}

Michigan State University, East Lansing 48824

Abstract

Three pig performance trials, a nitrogen balance and an in vitro trypsin inhibitor assay were conducted on a four variety composite of triticale. The triticale composite replaced part or all of the corn in nutritionally adequate, fortified corn-soybean meal starter and grower diets. In the first trial, triticale replaced corn in a starter diet in 20% increments. Eighty and 100% replacement of corn with triticale reduced average daily gain (ADG) significantly (P<.05). The antitrypsin activity in these diets was negatively correlated with ADG and gain per feed (r = –.87 and –.84, respectively). Nitrogen balance studies on these diets demonstrated increasing apparent protein digestibility and apparent net protein value as triticale increments increased despite the increased trypsin inhibition activity. In the second trial, triticale replaced 0, 50 or 100% of corn in pig starter diets adjusted to .96% lysine.

Complete replacement of corn with triticale resulted in significantly (P<.01) lower ADG and feed efficiency. In the third trial, heavier pigs (20 kg) were fed grower diets in which 0, 50 and 100% of the corn was replaced with triticale and adjusted to .75% lysine with soybean meal. ADG was significantly (P<.01) reduced when 100% of the corn in the grower diet was replaced with triticale.

¹ Michigan Agricultural Experiment Station Journal Article No. 8418.

² The authors express appreciation to Ms. A. Erickson and Ms. E. Fink for laboratory assistance.

³ Department of Animal Husbandry.

⁴ Department of Crop and Soil Sciences.