DETERMINATION OF EFFECTIVE CONCENTRATIONS OF AMINE SALTS IN THE CREATION OF CHEMICAL GROWTH PROMOTERS

In a laboratory experiment, the effect of three compounds – [[N,N'-bis(dimethylaminomethyl)thiourea-acetic]-copper sulfate pentahydrate (1), [N,N'-bis¬ (dimethylaminomethyl)thiourea-oxalate]-copper sulfate pentahydrate (2) and [N,N'-bis(dimethylaminomethyl)-thiourea-succinic]-copper sulfate pentahydrate (3) with active substance concentrations of 0.001%, 0.01% and 0.05% - on seed germination and morphometric parameters of sudangrass seedlings was studied, and the antifungal properties of the compounds were also studied. The study showed that the use of amine salts 1 and 3 at a concentration of 0.05% led to an increase in the germination energy of sudangrass seeds by 1.1 ‒ 9.2% compared to the control. The root length was positively affected by amine salts 1 and 2 in concentrations of 0.001 and 0.05%: both compounds caused an increase in the root weight of the sudan grass, the second also led to its elongation. All concentrations of the studied compounds had a fungistatic effect. Among the tested compounds, amine salts 1 and 3 in a concentration of 0.05% can be recommended as seed dressings with fungistatic activity, promoting a more uniform emergence of shoots. Amine salt 2 in a concentration of 0.05% is the most effective agent, which in addition to antifungal activity also has a growth-stimulating effect.