The productivity of fenugreek depending on growth stimulators and retardant treatments

The results of four years of research (2016-2019) on the influence retardant of Hardy new generation; growth regulators Epin-extra, Zircon and microfertilizer Ferovit on the yield of hay fenugreek plants (Trigonella foenum-graecum L.) were analysed. Comparative study of the growth, development and productivity of medicinal plants revealed their dependence on meteorological conditions of vegetation season. In unstable weather conditions, growth regulators with different active substances were effective; their impact on increasing the productivity of the aboveground part and seeds was not always the same. With excessive moisture in 2017 Epin-extra and Hardy preparations increased seed yield by 29.72 and 28.37 % compared to the control. In 2016 and 2018 the yield of fenugreek was increased by a binary mixture of Zircon + Ferovit and Hardy’s retardant. In 2018 the best result was when using a binary mixture (by 21.83 % compared to the control), and in 2016 - a retardant (by 27.18 % compared to the control). In 2019 Epin-extra and binary mixture of Zircon + Ferovit increased the yield of seeds by 25.0 and 27.5 % compared to the control. The use of Hardy retardant significantly positively affected the high mass indices of 1000 Pcs. seeds regardless of the observation year conditions. Average value of this indicator for four years of observations was 18.8 g. The data obtained prove that exogenous treatments compensate for negative effects of adverse weather conditions. The work was realized in the framework of the research topic № 0576- 2019-0007.