EFFECTS OF AMINO ACID PREPARATIONS ON COSMOS BIPPINATUS AND COSMOS SULPHUREUS

The purpose of research is to study the effect of amino acid preparations on the quality of cosmos seedlings. For this purpose, the following tasks were solved: indicators of the average trend in the parameters of seedlings of two types of Cosmos were established; the contribution of varietal characteristics and preparations to seedling parameters was assessed; The reliability of the differences between the experimental variants was established. We used varieties of double-pinnate Cosmea (lat. Cosmos bippinatus) – Popsoks rozovyj, Limonad, Snezhnyj klik and variety of Cosmea serno-zheltaj (lat. Cosmos sulphureus) Zolotaya dolina. We tested the amino acid preparations Stimul Antistress and Aminozol. Measurements were carried out on such parameters as shoot height, plant height, number of leaves, stem thickness in the first internode. To analyze statistical data, methods of descriptive statistics, analysis of variance and the method of pairwise differences of group means with NSR05 were used. It was established that the Snezhnyj klik variety showed minimal germination, and further studies were not carried out on this variety. The most leveled seedlings of the Limonad variety in height are achieved when treated with Stimul and Aminosol (variation coefficient 14.5 and 15 %), the Popsoks rozovyj variety – in the control variant (11.8 %) and with Stimul Antistress (14 %), the Zolotaya dolina variety gives homogeneous plants without treatment and with Aminosol (12.3 and 12.4 %). Analysis of variance of the parameters of the Cosmos double-pinnate varieties showed that the drugs do not significantly affect the height of the shoot, but they affect the number of leaves and the thickness of the stem in the first internode by 13 % (49 %). When assessing the effect of drugs on cosmos species, it turned out that they only affect the thickness of the stem (by 35 %). Due to the low influence of drugs on the uniformity of seedling parameters, we consider further use of drugs to be ineffective specifically for cosmos species and varieties.