Chemical properties of humic biostimulant “Lignohumate” at different stages of its synthesis

Zhurba, V.S.; Yakimenko, O.S.; Khreptugova, A.N.; Gorbunov, D.M.; Perminova, I.V.

Авторы: Zhurba V.S., Yakimenko O.S., Khreptugova A.N., Gorbunov D.M., Perminova I.V.
Сборник: Book of Abstracts. Ninth International Conference of the CIS IHSS on humic innovative technologies "Humic substances and green technologies" (HIT-2024)
Тезисы
Год издания: 2024
Место издания: Non-Commercial Partnership “Center for Biogenic Resources “Humus Sapiens” (NP CBR “Humus Sapiens”) Москва
Первая страница: 78
Последняя страница: 78
Аннотация: Humic products (HPs) are increasingly used in agriculture, being considered as the main category of biostimulants. The chemical composition and efficiency of HPs as plant growth stimulators vary depending on the organic matter source, extraction processes and the technologies used to obtain the products [1]. Therefore, chemical characterization of HPs entering the market combined with verification of their efficacy as biostimulants is an urgent complex task.The objective of this work was to characterize the chemical composition, biological and antioxidant activity of the product “Lignohumate” (LH) depending on the durability of its synthesis from row material. A number of samples were taken at different times of the technological process, and qualitative differences in the composition of LH were analyzed.The results showed that the pH of the solutions decreased from 10.8 to 8.1 with the duration of treatment, while the density increases from 1.08 to 1.14 g/mL. A gradual synthesis of humic-like substances (HLS) occurred: the share of HA in LH increased from 40-50% in the first period, and later reached 80%. The transformation of organic matter was evaluated by the optical properties of solutions in the UV-Vis regions. The absorption spectrum of the working solution differed from the spectra of samples subjected to artificial humification. The former was characterized by the lowest optical density, the presence of a maximum at 285 nm and a shoulder at 235 nm, indicating the presence of phenolic compounds. With increasing the oxidation time the absorbance increased, the shoulder at 235 nm disappeared, and the intensity of the peak at 285 nm became less pronounced. The calculated spectral indices indicated that molecular weights decreased with treatment time, and aromaticity increased. Examination of the antioxidant activity (AOE) trends for fast and slow centers showed that in the first period of the treatment, the fast antioxidant centers predominate over the slow centers, indicating a more fulvate character of the samples, which was also confirmed by the low humification index expressed by the low CHA/CFA ratio. The timing to obtain the maximum biological activity for the LH-product at concentration of 0.02% was evaluated in laboratory phytotest.Correlation analysis revealed a positive correlation between seedling root length and CHA/CFA (0.84); whereas no correlation was found between antioxidant and biological activity. Therefore, depending on the purpose of use and requirements for the humic product, the treatment time can be used as a tool to emphasize either biological activity or antioxidant activity of the final product.
Добавил в систему: Якименко Ольга Сергеевна

	ИСТИНА	Войти в систему Регистрация
	ИСТИНА ФИЦ ПХФ и МХ РАН
	Главная Поиск Статистика О проекте Помощь

ИСТИНА

ИСТИНА ФИЦ ПХФ и МХ РАН

Chemical properties of humic biostimulant “Lignohumate” at different stages of its synthesisтезисы доклада

Прикрепленные файлы