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Impact dehulling oat grain to improve quality of on-farm produced feed. I. Hullability and associated changes in nutritive value and energy content

Peltonen-Sainio, Pirjo; Kontturi, Markku; Rajala, Ari and Kirkkari, Anna-Maija (2004) Impact dehulling oat grain to improve quality of on-farm produced feed. I. Hullability and associated changes in nutritive value and energy content. Agricultural and Food Science, 13 (1), pp. 18-28.

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Summary

High hull content of oat (Avena sativa L.) limits its use as on-farm feed. Dehulling, used in the oat processing industry, can be performed on-farm, to increase nutritive value and energy content. A laboratory model of an impact oat dehuller, similar to a commercial device, was used to study the effects of rotation speed, grain characteristics and moisture content on hullability and groat energy content. Grain of oat cultivar Salo [from official variety trials, MTT Agrifood Research Finland, Jokioinen (60°49'N), 1996–2000] was assessed for quality prior to dehulling. Impact dehulling rotation speed ranged from 200 to 500 r min-1 at 50 r min-1 intervals, with moisture content of grains ranging from 10% up to 18%. Dehulling improved oat energy content markedly. Hullability was better at higher rotation speeds. 350 r min-1 was determined to be adequate to result in improved quality as no marked additional improvements were demonstrated by increasing rotation speed further. As the proportion of hulless groats increased with higher rotation speeds, nutritional and energy content of groat yield improved consistently. The higher the grain moisture, the higher the proportion of grains retaining hulls. Impact dehulling proved to be a potentially useful method to increase energy content of oat grains on-farm.


EPrint Type:Journal paper
Keywords: Avena sativa, fat, fibre, grain, groat, hulls, metabolizable energy, oat, proteins, rotational speed
Subjects: Crop husbandry > Post harvest management and techniques
Research affiliation: Finland > MTT Agrifood Research
ISSN:1795-1895
Related Links:http://www.mtt.fi/english
Deposited By: Koistinen, Riitta
ID Code:16837
Deposited On:11 Mar 2010 10:31
Last Modified:12 Apr 2010 07:43
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

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