Biochemical indices of lentil seeds depending on cultivation technology elements
Purpose. To investigate the effect of sowing time, microfertilizers and growth regulators on biochemical indices of lentil seeds. Methods. Field and laboratory ones. Results. Biochemical indices of lentil seed quality are given depending on the influence of sowing time, microfertilizers, growth regulators and their combination. Various factors affected the formation of biochemical indices of lentil seeds. Over the years of investigation, the content of crude fiber on the average was 3.2-3.3% for the control, the maximum value reached 6.9% in case of application of Reakom-SR-Bobovi + Regoplant during the first sowing time and 8.4% when applying Kvantum-Bobovi during the second sowing time. The Stimpo growth regulator influenced most of all on the starch content in the absolutely dry matter of seeds (56.5%) du­ring the first sowing time and when it was combined with microfertilizer Kvantum-Bobovi (54.3%) during the second sowing time. On the whole, the content of crude protein in the lentil seeds of the ‘Linza’ variety was 26-28% over the years of investigation. In case of the combined application of microfertilizers and growth regulators (Reakom-SR-Bo­bovi + Stimpo), the protein content was 27.81% during the first sowing time and from 27.69% (Kvantum-Bobovi + Regoplant) to 28.60% (Reakom-SR-Bobovi) during the second sowing time. Conclusions It was found that the maximum content of crude fiber were in versions with the application of microfertilizer Kvantum-Bobovi for plant nutrition in the bud-formation stage (4.5%) during the first sowing time and 10,8% during the second sowing time in 2016. The maximum content of starch in lentil seeds in 2016 during both sowing periods was 58,0 and 55,8% respectively in the version with the application of a growth regulator Stimpo in the bud-formation stage. In 2017, the highest indices were shown in the versions of Kvantum-Bobovi and Kvantum-Bobovi + Regoplant (55.1%) during the first sowing time and in the version of Reakom-SR-Bobovi (54.3%) during the second sowing time. The content of crude protein in lentil seeds in 2016 for Reakom-SR-Bobovi + Regoplant version was 27.92% during the first sowing time and for Reakom-SR-Bobovi + Stimpo version reached 29.93% during the second sowing time. In 2017, the above index was amounted to 28.21% for the Regoplant version during the first sowing time and 28.39% for the version of Kvantum-Bobovi during the second sowing time.