A.N. Postnikov, E.V. Zol’nikova
Russian State Agrarian University-Moscow Timiryazev Agricultural Academy, Russia, Moscow city, Timiryazevskaya Str., 49
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Summary. This article presents the results on studying the growth regulators – IAA, EPIN – extra and 6 BAP (6-benzylaminopurine) for yield formation of fodder beet (Beta vulgaris convar. Crassa L.) and rutabaga (Brassica napus rapifera L.) in the first year of life in the conditions of Central non-Black soil zone. Research was carried out in 2010-2012 at the experimental field station at Russian State Agrarian University-Moscow Timiryazev Agricultural Academy. The higher increase in average during 3 years in variants with treatment of plants at the beginning of the second vegetation period was marked in variants with treatment of fodder beet plants with growth regulators EPIN – extra – 56,8 t-ha and IAA – 55,9 t-ha in comparison with control – 49,7 t-ha. As for the rutabaga plants, the highest yield was obtained while treatment with 6 BAP – 57,7 t-ha. Effects of growth regulators IAA and EPIN – extra applying gave practically the similar results – 55,2 and 55,6 t-ha . In average the largest leaf area of fodder beet and rutabaga plants in harvesting time – 63,1and 79,7 thousand sq. m-ha along with reducing the concentration of dry matter – 12,2 and 8,0% was observed in variant with treatment by EPIN – extra referring control – 41,8 and 68,6 thousand sq. m-ha and 13,0 and 8,4% accordingly. Applying 6 BAP led to reducing both the concentration of dry matter (while processing fodder beet – at 0,7%, rutabaga – 0,9%) and the leaf area (at 0, 9 thousand sq. m-ha at fodder beet), and treatment of rutabaga by above growth regulation increased the leaf area at 4,0 thousand sq. m-ha . In dry weather conditions (2010 and 2011) the use of IAA and 6 BAP was most effective, in conditions of sufficient moisture (2012) – all the studied variants at both crops.
Keywords: fodder beets, rutabaga, growth regulation, productivity, leaf area, dry substance.