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Kvasny Prum. 2011; 57(7-8): 223-230 | DOI: 10.18832/kp2011023
Within the scope of small-scale fields' experiments, the influence of application of sulphur and nitrogen (N1 = 30 kg N.ha-1, N2 = 50 kg N.ha-1) on the content of starch and proteins in barleycorn of Jersey variety was observed during vegetation in 2005 to 2009. There were also determined the content of sulphur amino acids in barleycorn and malt, and the content of precursors of dimethyl sulfide in malt. On average the highest content of starch (64,12 %) was detected after repeated application of fertilizer SAM 240, the lowest content (63,42 %) was detected after fertilization by LAV 27 in grain with subsequent fertilization DAM. Sulphate sulphur applied in fertilizer SAM 240 in DC 31 stage stabilized the content of starch in grain when using of higher doses of nitrogen. There was determined a medium dependence between the content of sulphur and starch. Higher dose of nitrogen rose the content of N in corn by 0,12 % and in combination with fertilization by sulphur it was by 0,24 %. Fertilization by sulphur rose the intake and utilization of N which is also proved by the medium dependence between the content of nitrogen and sulphur in barleycorn (r = 0,503**). The content of sulphur amino acids of nitrogen in barleycorn and precursors of dimethyl sulfide in malt was not significantly affected by sulphur supplements.Within the scope of small-scale fields' experiments, the influence of application of sulphur and nitrogen (N1 = 30 kg N.ha-1, N2 = 50 kg N.ha-1) on the content of starch and proteins in barleycorn of Jersey variety was observed during vegetation in 2005 to 2009. There were also determined the content of sulphur amino acids in barleycorn and malt, and the content of precursors of dimethyl sulfide in malt. On average the highest content of starch (64,12 %) was detected after repeated application of fertilizer SAM 240, the lowest content (63,42 %) was detected after fertilization by LAV 27 in grain with subsequent fertilization DAM. Sulphate sulphur applied in fertilizer SAM 240 in DC 31 stage stabilized the content of starch in grain when using of higher doses of nitrogen. There was determined a medium dependence between the content of sulphur and starch. Higher dose of nitrogen rose the content of N in corn by 0,12 % and in combination with fertilization by sulphur it was by 0,24 %. Fertilization by sulphur rose the intake and utilization of N which is also proved by the medium dependence between the content of nitrogen and sulphur in barleycorn (r = 0,503**). The content of sulphur amino acids of nitrogen in barleycorn and precursors of dimethyl sulfide in malt was not significantly affected by sulphur supplements.
Received: May 24, 2011; Accepted: June 24, 2011; Published: July 1, 2011