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In four-year-lasting field experiment yielding and chemical composition of goldenrod (Solidago virgaurea L. ssp. virgaurea) herb depending on different methods of plantation establishment and natural growth regulator Atonik application were analysed. In the experiment different methods of goldenrod plantation establishment were compared: A. direct spring diaspores sowing, B. spring planting of seedlings, C. direct autumn diaspores sowing, D. autumn planting of seedlings as well as spraying with 0.1% solution of Atonik twice a year. Diaspores were sown directly onto the field in rows 40 cm apart, whereas seedlings were produced in multicell trays in plastic tunnel throughout 5 weeks and then transplanted onto the field in 40 cm × 15 cm raw spacing. Raw material was harvested every year at the beginning of blooming stage and after that chemical analyses comprised leiocarposide content (by HPLC method) were done. The highest yields of raw material were obtained in the second and third years of cultivation, while in the fourth year a considerable yields decrease was observed, indicating that goldenrod plantation should last two or three years. Higher raw material yields characterized by higher leiocarposide content were collected from the plots with spring seedlings transplanting or autumn diasporas sowing, thus these methods of plantation establishment should be recommended on commercial plantations of goldenrod. Additionally, plants should be sprayed with 0.1% Atonik in order to increase raw material yields.
The influence of year, weather conditions, cultivars and variants of Atonik and Polybor 150 applications on sugar beet root yield and digestion was observed in field polyfactorial trial. We observed that the most optimal variant for yield (58.87 t·ha-1) and digestion (19.90°S) was the variant C (Atonik: 0.4 dm3·ha-1 - 2. post-emergence herbicide application + Atonik + Polybor 150: 0.6 + 2.5 dm3·ha-1 - 3. postemergence herbicide application + Atonik + Polybor 150: 0.6 + 2.5 dm3·ha-1 - 1. fungicide treatment). Significant root yield values achieved the cv. Flair (+ 1.28 t·ha-1 compared with Swing) and digestion values achieved the cv. Swing (+ 0.26°S compared with cv. Flair). The highest root yield (70.68 t·ha-1) and digestion (24.85°S) were achieved in 2002 and 2004 at the cv. Swing.
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