Growth regulators’ action on grain yield formation of white lupin

The results of a comparative test of the growth regulators Circon and Epin-extra for white lupin (Lupinus albus L.) on the potassium monophosphate background are shown. The positive effect of the regulators on the vegetative development of white lupin plants and on development of assimilation surface, on chlorophyll and carotenoids content in leaves was set. Use of the chemicals in lupin crops fostered yield increase. The pre-sowing seed treatment following with spraying by the growth regulators Circon and Epin-extra at the bud formation stage were the most productive way to affect the development of this character. The yield of the var. Dega exceeded the standard one by 10.4 and 8.5% respectively; the yield of the var. Alyi parus — in 17.0 and 13.5%. The different response level of the white lupin varieties Dega and Alyi parus to the action of the growth regulators was observed.