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...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Czech Academy of Agricultural Sciences
2019-05-01
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| Series: | Plant, Soil and Environment |
| Subjects: | |
| Online Access: | https://pse.agriculturejournals.cz/artkey/pse-201905-0001_balance-of-potassium-in-two-long-term-field-experiments-with-different-fertilization-treatments.php |
| 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. |
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| ISSN: | 1214-1178 1805-9368 |