In the dissertation the results of researches on development of elements of technology of lentil growing in the conditions of the Forest-Steppe zone of Ukraine are presented. The peculiarities of the influence of the investigated elements of cultivation technology, in particular, on the influence of seedlings, microfertilizers and growth regulators on the growth and development of lentil and the productivity of the culture have been established.
Depending on the density of plants and weather conditions on plants a different number of leaves was formed. So, in plants of the 2nd stage of sowing, there was a significantly smaller number of leaves compared to the 1st year. The greatest difference between the terms for this indicator was found in the achievement phase, where the values vary from -14.5 to 38.1 % (Stympo and Reakom-SR-Bobovi + Stympo respectively), the lowest – in the phase of bean production - from -8.0 to -27.1 % (Rehoplat and control). Depending on the sowing period, the average number of leaflets varied from 342.7 units per plant to 419.7 units per plant in the Kvantum-Bobovi + Stympo variant for the 1st term and from 245.7 units per plant – Reakom-SR-Bobovi + Stympo to 410.8 pieces/plant Kvantum-Bobovi – for the 2nd term.
On average, over the years of research, the largest peak of the leaf surface falls on the flowering phase on experimental sites of both sowing periods (3944.2 cm2 and 2504.3 cm2). In the phases of the stairs (170.2 cm2 – the 1st row, 219.1 cm2 – the 2 nd row) and stalks (568.0 cm2 – the 1st row, 662.9 cm2 – the 2 nd row) of the plants 2 th period have higher indicators of the area of the leaf surface.
Describing the structural element of the crop – beans, it can be concluded that the highest values of the total number of beans (35.4 pcs.) And the number of sifted beans (27.4 pc.) For the first sowing period were formed in the version number 9 Reakom-SR-Bobovi + Stympo, for the 2nd term – in the version number 16 Reakom-SR-Bobovi – 23.8 and 18.4 pc. in accordance.
As a result of the conducted research, it was found that, on average, over the years of research, the highest yields for the first period after the Stympo growth regulator were 2.37 tons/ha (+7.1 %) and in the versions of Kvantum-Bobovi + Rehoplant and Reakom-SR-Bobovi + Stympo – 2.02 (+13.3 %) for the second sowing season. Similarly to the dynamics of seed yield changes, in the first sowing period, the value of the obtained products was higher.
The main indicator of the quality of lentil seeds is the content of crude protein. Thus, the maximum values were Reakom-SR-Bobovi + Stympo – 27.81 % (+ 2.1 %) for the first sowing date and Reakom-SR-Bobovi – 28.60 % (+1.9 %) in the 2nd line.
In addition to crude protein in the seeds, lentils also determined the content of starch and crude fiber. The content of starch in the absolutely dry substance was the highest in the variant with the growth regulator Stympo – 56.5 % (+5.8 % to control) for the first term and Kvantum-Bobovi + Stympo – 54.3 % (+2.3 %) for the 2nd line. The highest indices of the content of crude fiber for the first sowing date were recorded in the variant Reakom-SR-Bobovi + Rehoplant – 6.9 % (+109.1 %), in the 2nd term – Kvantum-Bobovi – 8.4 % (+ 86.7 %).
Keywords: lentil, lines of sowing, microfertilizers, growth regulators, yield, energy efficiency coefficient, economic efficiency.
