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Biorefined organic grass-clover for growing pigs: effect on performance and fatty acid profile.

Stødkilde, Lene; Ambye-Jensen, Morten and Jensen, Søren Krogh (2020) Biorefined organic grass-clover for growing pigs: effect on performance and fatty acid profile. Journal of Animal Feed Science and Technology., tba, tba. [draft]

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The purpose of the study was to extract protein from organic grass-clover in a biorefining process and report the effects on pig performance and fatty acid profile when including increasing amounts of the protein in feed mixtures. Forty-eight pigs were fed one of four experimental diets from one weak post-weaning to slaughter. The diets consisted of a control diet and diets with 5, 10, or 15% extracted grass-clover protein included. The extracted protein had a crude protein content of 458 g/kg dry matter, a content of total sulphur-containing amino acids comparable to soy press cake, but a lower lysine content. Acid-insoluble residue constituted 215 g/kg dry matter, and the dominating fatty acid was α-linoleic acid. Addition of grass-clover protein extract to the diet did not affect feed intake or growth in starter, grower or finisher pigs and no difference was found in animal slaughter weight. There was a significantly increased meat percentage in animals fed 15 % grass-clover protein extract compared to controls (57.2 % in control vs 60.3% in 15% pigs). Increased addition of grass-clover increased the content of α-linolenic acid in the fat and liver tissue and in the Longissimus dorsi muscle, but also increased the need for antioxidants as demonstrated by a lowered vitamin E content in the meat. In conclusion, the study reports on the composition of protein extracted from organic forages and presents important results from a feeding trial with 48 pigs, where grass-clover protein extract can substitute soybean press cake without adverse effects on performance.

EPrint Type:Journal paper
Keywords:Biorefining, grass-clover, organic pig production, fatty acids.
Subjects: Animal husbandry > Feeding and growth
Animal husbandry > Production systems > Pigs
Crop husbandry > Post harvest management and techniques
Research affiliation: Denmark > AU - Aarhus University
Denmark > Organic RDD 3 > SuperGrassPork
Deposited By: Stødkilde, Dr Lene
ID Code:37583
Deposited On:01 Apr 2020 10:11
Last Modified:01 Apr 2020 10:11
Document Language:English
Refereed:Not peer-reviewed

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