Influence of locality, year and sampling term on the stability of soil aggregates under diffirent tillage

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00027006%3A_____%2F22%3A10175829" target="_blank" >RIV/00027006:_____/22:10175829 - 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 locality, year and sampling term on the stability of soil aggregates under diffirent tillage

Original language description

Soil aggregate stability is an important factor because it affects soil fertility, water and nutrient retention and erosion rates. The choice of appropriate tillage practices is therefore essential to maintain soil fertility and ensure crop economy. Conventional tillage is very energy-intensive and can reduce soil organic carbon content compared to limited and no-tillage intensity. Therefore, the European Common Agricultural Policy subsidy rules favour no-tilled management.Herein, it was compared the effect of conventional tillage (CT) and no-tillage (NT, direct sowing) on grain yield and soil aggregate stability (SAS) in crop rotation. The changes in SAS and grain yield between CT and NT management were evaluated in winter wheat grown after two-year-old alfalfa, and in spring barley cultivated after sugar beet. The Ivanovice and Žabčice Czech Republic sites chosen for these long-term field trials differed in soil and climate conditions. The 1970 Ivanovice trial was established on Luvi-haplic Chernozem and the 2004 Žabčice trial crops were grown on Gley Fluvisol.The greater 0.5 cm topsoil SAS was established at both sites for the CT compared to NT crop variants, but the soil organic carbon (SOC) content was lower in the CT variants. The pH values of all variants ranged from 6.6-7.5, and CT pH decreased, or it remained similar in the Žabčice winter wheat strains.The CT increase in soil aggregate stability is explained by the combined decrease in pH-value and increased exchangeable Ca2+ content with an overall higher Feox content for both sites. The Žabčice site&apos;s exchangeable Ca2+ content is controlled by the proportion of smectite layers in the clay fraction, and higher smectite layer ratio was identified in the CT variants. The proportion of illite layers in the clay fraction and the content of exchangeable K+ in the fraction below 2 mm decreased with CT management. Increased illite layers in the no-tilled variant&apos;s topsoils is related to the greater K+ fixation by mixed-layer minerals due to K+ fertiliser and higher SOC plant residue content. The increase in the proportion of smectite layers and decrease in illite layers in the CT variants&apos; clay fraction is due to soil plough-mixing. This management procedure homogenises the mineral phase content in the ploughed layers.

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