Otsekülvi mõju mulla kvaliteedile Eesti tootmispõldudel
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Kuupäev
2018
Kättesaadav alates
Ajakirja pealkiri
Ajakirja ISSN
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Kirjastaja
Eesti Maaülikool; Eesti Taimekasvatuse Instituut
Abstrakt
Finding out the best agricultural management practices for certain climatic regions
and soils is crucial to maintain soils quality. One of the practices, to stop soil erosion,
reduce leaching and increase soil organic carbon content, is no-tillage. No tillage is
coming more popular also in Estonia. It helps to reduce fuel and labour costs. However,
as there is missing decades long practice of no-tillage in Estonia, its effect on soil
quality is not clear. At the same time, easy methods to detect soil quality are needed
next to the laboratory analyses. During the project iSQPER the visual assessment tool
was developed for easy detection of soil quality. The aim of the current study was to
compare visual assessment with laboratory measurements on Estonian no-till fields
in the 2016. The study was done on sandy loam Gleyic Stagnic Luvisol in Põlva and
sandy loam Stagnic Luvisol in Tartu County. Visual assessment was made from the soil
upper 30 cm layer, laboratory measurements from 5–10 cm and 25–30 cm depth. The
parameters studied were: erodibility, water logging, soil structure and slaking, colour,
porosity, plough pan, organic carbon content, penetration resistance and amount of
earthworms. The study revealed slightly better soil quality under no-tillage by visual
assessment. In most cases laboratory analyses confirmed these results. Structural
distribution was better by ploughing compared with no tillage. However, fine aggregate
(0.25–2 mm) stability was higher under no-tillage compared with ploughing. There
were no significant differences in number of earthworms between practices.
Kirjeldus
Märksõnad
visual assessment, laboratory measurements, no-tillage, ploughing, structure, articles