Influence of acidification caused by ammonium sulphate application on the stability of soil aggregates - CISTRO Conference, Brno 2022

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F22%3A00000207" target="_blank" >RIV/00025798:_____/22:00000207 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Influence of acidification caused by ammonium sulphate application on the stability of soil aggregates - CISTRO Conference, Brno 2022

Original language description

The stability of soil aggregates and grain yields were evaluated in 2018-2021 in selected variants of a long-term small-plot field trial with spring barley monoculture. The trial was established in 1970 in a dry location with Gleyic Fluvisol in the Žabčice locality of the Czech Republic. The evaluated variants included a combination of incorporated and harvested straw with doses of 0, 30, 60 and 90 kg N/Ha in the form of ammonium sulphate (NH4)2SO4. The soil aggregate values (SAS) determined on all compared variants were high to very high at 54-64percent, and the effect of evaluated cropping measures on SAS values was overlain by the effects of year, sampling period and their interaction. Results of the overall assessment over four years revealed approximately 5percent SAS increase in harvested straw in all 30N, 60N and 90N nitrogen application than the 0N control. The SAS in incorporated straw gradually increased with increasing nitrogen dosage. This was also within the 5percent range. These differences between the evaluated variants are related to the results determined by soil sample mineral and geochemical analysis. The relatively high content of Fe- and Al-(oxo)hydroxides extracted with ammonium oxalate - poorly crystalline, amorphous phases and bound to organic matter (Feox and Alox) confirmed their influence on increased SAS values with decreasing pH. Acidification increased with increasing fertiliser dosage, and SAS values increased with decreasing pH due to increased ammonium sulphate application. The effect of Feox + Alox on soil organic matter stability at lower pH increased at the expense of the influence of exchangeable calcium content. The variants with incorporated straw had significantly higher 0.51 t/Ha average barley grain yields although the SAS value for 30N and 60N fertiliser rates was lower than for variants with harvested straw. This indicated the significant effect of organic matter in influencing soil processes and soil fertility. Although SAS is an important indicator, it should be considered in relationship to other soil properties when evaluating soil quality and fertility.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

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OECD FORD branch

40106 - Agronomy, plant breeding and plant protection; (Agricultural biotechnology to be 4.4)

Project

<a href="/en/project/QK1810186" target="_blank" >QK1810186: Agrotechnical measures for improvement of soil structure stability and rainwater infiltration</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2022

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů