Comparative analysis of the influence of biostimulants on the sowing quality of soybeans in laboratory conditions

Abstract

Objective. To establish the effectiveness of using biostimulants GRAND Alitti, CRAND ERMEI and GRAND in different concentrations to improve the sowing qualities of soybean seeds. Methods. When determining the germination energy and laboratory germination of soybeans in laboratory conditions, generally accepted methods of DSTU 4138-2002 were used. A certain number of seeds were sown in standard conditions. The germination energy was determined on the 5th day. Results. According to the results of the studies, treatment with the GRAND biopreparation (in concentrations of 1:2, 1:3, 1:4) gave lower germination energy indicators than the control, which indicates a negative or neutral effect of this drug. Treatment with GRAND Alitti 1:3 demonstrated the lowest average value – 30 %. The results of the studies on the treatment with the GRAND ERMEI preparation at a concentration of 1:2 showed the worst result – an average value of 22 %, which is 14 % lower than the control, while the concentrations of 1:3 and 1:4 showed the same average results – 32 % each, which is 4 % lower than the control. The results of laboratory germination studies on the treatment of seeds with the GRAND biological preparation at a concentration of 1:2 had an average value of 32 % (2 % lower than the control) and defines the effect as neutral; the GRAND 1:3 variant has an average value of 34 %; the GRAND 1:4 variant has an average value – also 34 %. The best laboratory germination results were shown by the GRAND Alitti concentration of 1:2 with an average value of 42 %, which significantly exceeds the control (34 %). The results of the studies showed that when treating GRAND ERMEI at a concentration of 1:2, the average germination value is 20 %, which is 14 % lower than the control, i.e. this concentration inhibits soybean germination; in the GRAND ERMEI 1:3 variant, the average value is 26 %, 8 % lower than the control and is characterized by a neutral effect; in the GRAND ERMEI 1:4 variant, the average value is 40 %, which is 6 % higher than the control. Conclusions. As a result of laboratory studies, it was found that the effect of biostimulants on germination energy and laboratory germination of soybeans largely depends on the characteristics of the drug and the concentration of the solution. The most effective were GRAND Alitti (1:2), which had a positive effect on both germination energy and laboratory germination, exceeding the control values; GRAND ERMEI (1:4) provided the highest laboratory germination (40 %) among all variants.