The effect of selected factors of production on yields and contents of N-substances in malt barley grain
Babianek, P.,Mendelova Zemedelska a Lesnicka Univ., Brno (Czech Republic). Ustav Agrochemie, Pudoznalstvi, Mikrobiologie a Vyzivy Rostlin | Vavrousova, P.,Mendelova Zemedelska a Lesnicka Univ., Brno (Czech Republic). Ustav Technologie Potravin | Ryant, P.,Mendelova Zemedelska a Lesnicka Univ., Brno (Czech Republic). Ustav Agrochemie, Pudoznalstvi, Mikrobiologie a Vyzivy Rostlin | Hrivna, L.,Mendelova Zemedelska a Lesnicka Univ., Brno (Czech Republic). Ustav Technologie Potravin | Cerkal, R.,Mendelova Zemedelska a Lesnicka Univ., Brno (Czech Republic). Ustav Pestovani Rostlin, Slechteni a Rostlinolekarstvi
The objective of our three-year small-plot trial was to assess the effect of the weather, forecrop, variety, form of sulphur (elementary and sulphate) and additional nitrogen fertilising on the yields and the content of N-substances of the malting barley varieties Jersey and Sebastian. The trial was carried out in 2006-2008. The two varieties were grown after three different forecrops - winter wheat with ploughed down straw, sugar beet with ploughed down tops and maize for grain with ploughed down straw. The fertilising treatments differed in the form of sulphur (elementary and sulphate) and date of the additional N fertilising. As the sulphate form we chose ammonium sulphate (40 kg/ha N and 45.6 kg/ha S) and the same amount was supplied in the form of elementary S; N was in the form of urea. A dose of 30 kg/ha of ammonium nitrate with limestone (ANL) was applied as additional N fertilising. The results show that the weather conditions of the respective years had an almost 94 % effect on yields. The very strong effect of the weather overshadowed the effect of the forecrop (3.8 %); the effect of the variety was only half that of the forecrop (1.8 %). The form of additionally applied S and N during cultivation had a relatively little effect on the yields (0.2 %). The forecrop affected the content of N-substances most of all (47.3 %). The quality of barley grain was markedly dependent on the course of the weather (40.1 %); the effect of the variety on the level of N-substances was relatively low (1.6 %). Applications of various forms of S had a small effect on the grain quality (0.01 %), while the effect of additional N fertilising on the content of N-substances was 8.5 %.
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