Influence of application N and S on the chemical composition of barley corn and malt
2011
Hrivna, L., Mendelova Univ., Brno (Czech Republic). Ustav Technologie Potravin | Radoch, T., Mendelova Univ., Brno (Czech Republic). Ustav Technologie Potravin | Gregor, T., Mendelova Univ., Brno (Czech Republic). Ustav Technologie Potravin | Sottnikova, V., Mendelova Univ., Brno (Czech Republic). Ustav Technologie Potravin | Cerkal, R., Mendelova Univ., Brno (Czech Republic). Ustav Pestovani, Slechteni Rostlin a Rostlinolekarstvi | Ryant, P., Mendelova Univ., Brno (Czech Republic). Ustav Agrochemie, Pudoznalstvi, Mikrobiologie a Vyzivy Rostlin | Prokes, J., Vyzkumny Ustav Pivovarsky a Sladarsky, Brno (Czech Republic). Sladarsky Ustav
The influence of S and N application (N1 = 30 kg N/ha, N2 = 50 kg N/ha) on the levels of starch and proteins in barley seeds (variety Jersey) was observed during vegetation in small-scale field experiments carried out from 2005 to 2009. In addition, concentrations of sulphur amino acids were determined in barley seeds and malt, concentrations of dimethyl sulfide precursors in malt. The highest average concentration of starch (64,12%) was detected after repeated application of the fertilizer SAM 240, the lowest conc. (63,42 %) was detected after the application of LAV 27 with subsequent fertilization with DAM. Sulphate sulphur applied in fertilizer SAM 240 in DC 31 stage stabilized starch levels in grain when using high doses of nitrogen. After high N doses N concentration in barley seeds increased by 0,12 %. When combined with S fertilization, it was by 0,24 %. S fertilization led to an increased N intake and utilization. The levels of sulphur amino acids in barley seeds and precursors of dimethyl sulfide in malt were not significantly affected by S fertilization.
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