Кількісні показники вмісту золи лучних рослин Лівобережного Лісостепу України

Abstract

We have carried out the study of the ash content in representatives of the various economic and systematic groups of wild meadow plants of the Left-bank Forest-steppe of Ukraine. It is established that the ash content of the investigated plants ranged from 3,4 to 23,2 per cent. The amount of ash in some of the investigated gramineous representatives fluctuated almost in 7 times (the 3,0-16,9 per cent), in the bean – this scale was not so big. All studied species by the ash content was divided into three groups: small (7,0%), medium (score of 7,0-10,0%) and high (more than 10,0%). The greatest number of systematic groups had an ash content at the level of the second group. The accumulation of ash substances on the economic groups in the meadows in the phase of flowering showed a slightly larger content for the representatives of Fabaceae (8,0±0,4%) in comparison with the Poaceae (7,5±0,7%), for the representatives of forbs it was at the level of 9,0±0,2 per cent. The decrease in ash content at the end of the growing season was founded mostly in perennials. For the annual this trend is not followed. It was established that the total ash content in the aboveground mass of Urtica dioica L. from wet biotops is lower than in ones from drier biotops. Meadow representatives that grow on ordinary and typical chernozems have high ash content, on other soil types – medium and low. The significant difference in the ash content depending on hygromorpha was not detected. Only representatives of halophyts have a higher mineral content. Thus, the ash content of meadow plants from the researched region characterized by high variability. It depends on the systematic position, ontogeny phase of plants and the influence of external conditions, among which the major environmental factors are light, moisture and soil type. With this purpose to determine the nutritional value of plants, in particular, the ash content, it is necessary to conduct regular monitoring studies in specific areas and take them into account in forecasting the yield and productivity of meadow phytocenoses.