English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

Soil organic matter (SOM) is an essential soil constituent. The deficiency of SOM is an essential problem in many regions in Poland. Diversity of organic matter and the environment create varying structures and compositions, and thus differences in properties of humic substances (HS) especially humic acids (HAs). It was found that soil amendment with organic matter resulted in improving of soil and HAs properties compared with non-treatment ones. The results obtained provided the following evidences. With respect to HAs: an increasing content of carboxylic groups in HAs from amended soils; a major content of aromatic ring systems; higher carbon, nitrogen, hydrogen, and sulphur and lower oxygen contents comparing to the control; the addition of straw caused an increase of carbon content in HAs particles and, consequently a decrease of the C:H ratio; higher content of oxygen functional groups compared with non-treated ones. Organic matter from straw is more resistant to fast decomposition as compared to compost and it shows higher long-term sorption capacity. Therefore, straw may be an equivalent to natural sources of SOM in terms of agriculture and ecosystems protection. W zalezności od rodzaju egzogennej materii organicznej (obornik, kompost, sloma) wprowadzonej do gleb wyekstrahowane kwasy huminowe charakteryzowaly sie roznymi wlaściwościami. Stwierdzono, ze w kwasach huminowych wystąpil wzrost zawartości grup karboksylowych i fenolowych, wiekszy udzial struktur aromatycznych. W kwasach huminowych z gleb nawozonych stwierdzono wiekszą zawartośc wegla, wodoru, azotu i siarki oraz nizszą zawartośc tlenu w porownaniu do kwasow huminowych z gleb bez dodatku egzogennej materii organicznej. Dodatek slomy spowodowal wzrost zawartości wegla w skladzie pierwiastkowym kwasow huminowych a w konsekwencji zmniejszenie stosunku C:H. Materia organiczna ze slomy jest bardziej odporna na szybki rozklad w porownaniu z kompostem.

THE COMPARISON OF THE STRUCTURE OF HUMIC ACIDS FROM SOIL AMENDED WITH DIFFERENT SOURCES OF ORGANIC MATTER