Balance of potassium in two long-term field experiments with different fertilization treatments

Balance of potassium (K) was observed in long-term stationary field experiments (21 years) at two sites with different soil and climatic conditions (Luvisol, Cambisol). The following crops were rotated within the trial: potatoes- winter wheat-spring barley. All three crops were grown each year. The...

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Bibliographic Details
Published in:Plant, soil and environment soil and environment, 2019-01, Vol.65 (5), p.225-232
Main Authors: Balík, Jiří, Černý, Jindřich, Kulhánek, Martin, Sedlář, Ondřej, Suran, Pavel
Format: Article
Language:English
Subjects:
Animal manures
Barley
bioavailable k
Cereal crops
Climatic conditions
Crops
farmyard manure
Fertilization
Fertilizers
Field tests
Hydroxyapatite
Manures
Mineral fertilizers
Nitrogen
non-exchangeable k
Potassium
Potatoes
Soil conditions
Soils
Spring
Straw
Wheat
wheat, barley
Winter wheat
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Summary:Balance of potassium (K) was observed in long-term stationary field experiments (21 years) at two sites with different soil and climatic conditions (Luvisol, Cambisol). The following crops were rotated within the trial: potatoes- winter wheat-spring barley. All three crops were grown each year. The trial comprised 6 treatments: (1) no fertilization; (2) farmyard manure; (3) half dose of farmyard manure + nitrogen (N) in mineral nitrogen fertilizers; (4) mineral nitrogen fertilizers; (5) NPK in mineral fertilizers; (6) straw of spring barley + N in mineral nitrogen fertilizers. The recovery rate of potassium from farmyard manure by crops was 24–26%, from mineral fertilizers it was 27–52%. Different fertilization intensities were manifested by significant differences in the content of exchangeable K in soil. Changes in non-exchangeable K (Kne) were recorded only at the Luvisol site (850 mg Kne/kg), but not at the Cambisol site (3000 mg Kne/kg). The maximum negative balance (–2376 kg K/ha/21 years) was recorded at the mineral nitrogen fertilization treatment.
ISSN:1214-1178
1805-9368
DOI:10.17221/109/2019-PSE