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vol. 8, nr. 3 (2006)
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Content of some nutrients and mineral components in sugar beet depending on nitrogen fertilization and methods of weed control
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Joanna Kurus
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Department of Agricultural Ecology, Agricultural University, ul. Akademicka 13, 20-950 Lublin |
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vol. 13 (2009), nr. 3,
pp. 671-680
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abstract:
The field experiment was carried out in 1996-1998 in the Experimental Station in Bezek (near Chełm). Its aim was to investigate the effect of nitrogen doses, their division and date of application, as well as of methods of weed control on the content of some of nutrients and mineral components in roots and leaves of sugar beet. The experiment was carried out on a mixed rendzina soil formed from chalky bedrock, belonging to III b quality class. The experiment took into account three factors, i.e. 1. nitrogen fertilization (90 and 120 kg N ha-1), 2. systems of nitrogen dose splitting comprising two variants: a – 2/3 of nitrogen dose before sowing, 1/3 of nitrogen dose after thinning; b – 1/3 of nitrogen dose before sowing, 1/3 in one leaf phase of sugar beet, 1/3 after thinning, 3. method of weed control: I – Pyramin after sowing (6 l ha-1) + mechanical method, II – Pyramin after sowing (3 l ha-1) and Betanal foliar in 2-4 leaves phase of sugar beet (6 l ha-1), III – Betanal foliar in three splitting rates (2 l·ha-1) in the following terms: cotyledonous phase of weeds, 5-10 days after first application on new weed seedling, 5-10 days after second application, as required. The factors compared in the experiment did not affect significantly the content of dry mass, crude protein and crude fibre. Among mineral components only the content of N-total in roots of sugar beet increased with growing nitrogen fertilization intensity. The atmospheric factors modified the contents of nutritional and mineral components the most.
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keywords:
mineral components, nitrogen fertilization, nutrients, sugar beet, methods of weed control
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original in:
Polish
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