Effects of preceding crop, year, growing intensity and variety on grain yield and quality parameters in spring barley
2011
Vanova, M., Agrotest Fyto, Kromeriz (Czech Republic) | Palik, S., Agrotest Fyto, Kromeriz (Czech Republic) | Jirsa, O., Agrotest Fyto, Kromeriz (Czech Republic)
Spring barley (five varieties) was grown after four preceding crops (sugar beet, maize, cereal crop and oilseed rape) during the period of 2005_2008. All varieties, after all preceding crops, were grown using three crop management practices. Grain yield, volume weight, percentage of plump kernels (2.5 mm sieves) and concentrations of N-substances were evaluated. The effect of the year predominated in the experiments. It was due to a high instability of crop rotations containing only a few crops often repeated in the rotation and leaving a large amount of organic matter in the soil. It is followed by another important factor, weather conditions. If there was a lack of moisture during a short growing season of spring barley, especially at early growth and developmental stages, an overall structure of the stand was less able to form the required yield with high volume weight, low concentration of N-substances and a high percentage of plump kernels. The soil environment determined by the preceding crop limited or, conversely, stressed the negative effect of the weather in the given year. The highest grain yield as well as the highest volume weight were produced when the preceding crop was sugar beet. The percentage of plump kernels (87.8 %) was also high after sugar beet. The average level of N-substances was 12.1 %.
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