Gorzelany Józef, Belcar Justyna
Department of Food and Agriculture Production Engineering, University of Rzeszów, St. Zelwerowicza 4, 35-601 Rzeszów, Poland.
Molecules. 2025 Apr 25;30(9):1921. doi: 10.3390/molecules30091921.
The degree of hydrolytic modification (marked by parameters: extractive capacity, diastatic power and degree of fermentation) in wheat malts significantly influences their quality, determining their potential for use in brewing. Nitrogen fertilisation at a dose of 60 kg N·ha applied in 3-year field experiments had a positive effect on the extractability value of wheat malts, with an average value of 84.51% d.m. The value of diastatic power in the obtained malts, depending on the variety, was on average at the level of 334-414 units W-K (Windisch-Kolbach) and 357-380 units W-K, depending on nitrogen fertilisation. Wort attenuation obtained from the analysed wheat malts was at a similar level (on average 78.1%), except for malt obtained from grain of wheat fertilised with a nitrogen dose of 40 kg N·ha, for which significantly lower values were obtained (respectively, by 5.12%). The viscosity parameter of wheat malts, determining the degree of cytolytic modification, varied and averaged 1.95 mPa·s for the variety and for the nitrogen fertilisation applied. In 2-year canopy experiments, at a nitrogen fertilisation level of 60 kg N·ha, the Elixer cultivar was characterised by the best indicators of the degree of hydrolytic and cytolytic modification.
小麦麦芽的水解改性程度（以参数：浸出能力、糖化力和发酵程度为标志）显著影响其品质，决定了它们在酿造中的使用潜力。在为期3年的田间试验中，施氮量为60 kg N·ha对小麦麦芽的浸出率值有积极影响，干物质平均含量为84.51%。所获得麦芽的糖化力值，取决于品种，平均在334 - 414单位W-K（温迪施-科尔巴赫）水平，以及取决于氮肥用量的357 - 380单位W-K。从分析的小麦麦芽中获得的麦汁发酵度处于相似水平（平均78.1%），但从施氮量为40 kg N·ha的小麦籽粒获得的麦芽除外，其值显著较低（分别低5.12%）。决定细胞溶解改性程度的小麦麦芽粘度参数各不相同，对于所应用的品种和氮肥用量，平均值为1.95 mPa·s。在为期2年的田间试验中，在施氮量为60 kg N·ha的水平下，Elixer品种具有水解和细胞溶解改性程度的最佳指标。
