Special Issue "Research Progress on Extraction and Characterization of Humus" - Separations (MDPI)Dear Colleagues, I am pleased to invite you to publish your new humus data in a Special Issue "Research Progress on Extraction and Characterization of Humus" - Separations (MDPI).

Humus is a stable natural product of the joint evolution of living and nonliving matter. It is formed as a result of repeated transformation of plant and animal remains in the presence of minerals under the influence of biological, climatic, and geological factors for a long time. Humus is not just a specific product of biological waste disposal, but also an important soil component. In particular, it acts as a stabilizer of the physical and chemical state of soils. Moreover, it acts as a source and regulator of the supply of nutrients to plants and soil organisms while also serving as their habitat.

More details... | Подробнее...

Foliar Application of Humic-Stabilized Nanoferrihydrite Resulted in an Increase in the Content of Iron in Wheat Leaves

The image in the bottom row presents the total view of the droplets deposited on the surface of the wheat leaf; Images of the foliar spray droplets with ferrihydrite nanoparticles (FH) deposited on the surface of wheat leaf;  TEM image of the synthesized ferrihydrite (FH) nanoparticles and the corresponding electron diffraction image (inset); Mössbauer spectra of the ferrihydrite (FH) sample without urea treatment, models for their description, and the corresponding quadrupole splitting probability distribution functions.Foliar Application of Humic-Stabilized Nanoferrihydrite Resulted in an Increase in the Content of Iron in Wheat Leaves. Zimbovskaya M.M., Polyakov A.Y., Volkov D.S., Kulikova N.A., Lebedev V.A., Pankratov D.A., Konstantinov A.I., Parfenova A.M., Zhilkibaev O.T., Perminova I.V. //Agronomy. 2020. V.10. №12. P.1891.Search the full text below. Ищи полный текст ниже.Open access

The objective of this study was to synthesize iron (hydr)oxide nanoparticles (IONPs) stabilized by humic substances, and to estimate the feasibility of their use for foliar application on iron deficient plants. The IONPs were synthesized by rapid hydrolysis of iron(III) nitrate in a solution of potassium humate. The iron speciation and nanoparticle morphologies were characterized using X-ray diffraction, transmission electron microscopy, and Mossbauer spectroscopy. The obtained sample of IONPs was applied at concentrations of 1- and 10-mM Fe, and 0.2% urea was used as an adjuvant. Wheat plants (Triticum aestivum L. cv. L15) were used for the iron uptake test. For both of the concentrations tested, spraying the nanoparticles resulted in a 70–75% higher iron content in wheat leaves compared to ferric ammonium salt of ethylenediaminetetraacetic acid (Fe-EDTA). The synergistic effect of humic substances acting as a surfactant seemed to promote an increase in the iron uptake of the ferrihydrite nanoparticles compared to the aqueous Fe-EDTA solution used in this study. We concluded that humic-stabilized IONPs are much better suited to foliar application as compared to soil amendment when applied as a source of iron for plants. This is because humic substances act as a capping agent for nanoparticles and the surfactants enhance iron penetration into the leaf.

Подробнее...

Печать E-mail

Еще статьи...

Рейтинг@Mail.ru

http://www.youtube.com/RuRedOx

Feedback | Контакт
E-mail:
Этот адрес электронной почты защищён от спам-ботов. У вас должен быть включен JavaScript для просмотра.