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The impact of barley nitrogen fertilization rate on barley brewing using a commercial enzyme (Ondea Pro)

Yousif, AM and Evans, E ORCID: 0000-0001-8765-9227 2018 , 'The impact of barley nitrogen fertilization rate on barley brewing using a commercial enzyme (Ondea Pro)' , Journal of the Institute of Brewing, vol. 124, no. 2 , pp. 132-142 , doi: 10.1002/jib.478.

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Abstract

Two Australian (Buloke and Commander) and two Canadian (CDC Meredith and Bentley) barley varieties were grown under four levels of nitrogen fertilization (0, 20, 40 and 80 kg ha−1). Barley samples were assessed by barley brewing with the Ondea Pro enzyme cocktail for mashing analysis and were compared with typical malt brewing quality specifications. The study observed that increased nitrogen fertilization resulted in increased barley kernel nitrogen content which significantly impacted a range of wort quality parameters including increased soluble nitrogen, free amino nitrogen and barley beta‐amylase level, but also reduced extract, barley Kolbach index, β‐glucan and colour. Increased grain nitrogen had relatively little effect on apparent attenuation limit, lautering and barley limit dextrinase level. Knowledge of the effects of interactions between barley of different qualities (e.g. nitrogen content) and the Ondea Pro enzymes on wort quality will result in enhanced barley to directly and efficiently brew good quality beer, to better satisfy the quality expectations of brewers.

Item Type: Article
Authors/Creators:Yousif, AM and Evans, E
Keywords: barley, brewing, Ondea Pro, DP enzymes, nitrogen fertilization, quality
Journal or Publication Title: Journal of the Institute of Brewing
Publisher: Wiley-Blackwell Publishing
ISSN: 2050-0416
DOI / ID Number: 10.1002/jib.478
Copyright Information:

Copyright 2018 The Institute of Brewing & Distilling

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