Zinc - effect on the spring barley's plant and roots growth, grain technological quality, and yeast fermentation
2010
Cerkal, R.,Mendelova Univ., Brno (Czech Republic). Ustav Pestovani, Slechteni Rostlin a Rostlinolekarstvi | Hrivna, L.,Mendelova Univ., Brno (Czech Republic). Ustav Technologie Potravin | Ryant, P.,Mendelova Univ., Brno (Czech Republic). Ustav Agrochemie, Pudoznalstvi, Mikrobiologie a Vyzivy Rostlin | Prokes, J.,Vyzkumny Ustav Pivovarsky a Sladarsky, Brno (Czech Republic) | Brezinova Belcredi, N.,Mendelova Univ., Brno (Czech Republic). Ustav Pestovani, Slechteni Rostlin a Rostlinolekarstvi | Vejrazka, K.,Zemedelsky Vyzkum, Troubsko (Czech Republic) | Michnova, M.,Mendelova Univ., Brno (Czech Republic). Ustav Pestovani, Slechteni Rostlin a Rostlinolekarstvi | Gregor, T.,Mendelova Univ., Brno (Czech Republic). Ustav Technologie Potravin
In 2005-2008, the effect of zinc foliar application (0.5 kg/ha in DC 31 and 55 growth stage in the form of the Zinran fertilizer containing sulphate and zinc oxide - 19.8 and 52.3 %) on the size of the plants root system (its electric capacity in DC 23 and 57 was measured), the yield and quality of grain, and the course of the sweet wort fermentation process of six spring barley varieties (Bojos, Jersey, Kompakt, Malz, Sebastian, Tolar) was studied. Varietal differences were found in regard to the impact of Zn on the root system development. The grain yield rose by 3% on average after Zn application and so did grain over sieve 2.5 mm (by 9%) and weight of thousand grains (by almost 2%). Zn application led to a higher starch synthesis in the grain, the extract content values increased by 0.3-0.5%. After the Zn fertilizer treatment, the native Zn content in grain increased by 3-11%. On average, 143 g/ha was taken up by the grain yield (from 126 g/ha - Kompakt to 159 g/ha - Bojos), a higher uptake was observed in stands after a foliar application of Zn fertilizer (by 10-17%). A negative correlation between the Zn content and N substances in grain (ranging from r = -0.274 to -0.525**) was proved, and a positive correlation between this microelement and the starch content (r = 0.014 up to 0.367*) was confirmed, too. Positive correlations between the Zn content and friability (r = 0.329*-0.691***), and MQI (r = 0.274-0.603***), were found, while negative ones were established between Zn and beta-glucans levels in grain (r = -0.265 to -0.521**). Faster sweet wort fermentation processes during the first 24 hours were found in variants treated by Zn (by 1-1.5%), however, this fact was not reflected in the resultant depth of fermentation.
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