Secondary Salinization of Reclaimed Solonetzes and Its Aftereffect
| Autor: | N. V. Elizarov, N. I. Dobrotvorskaya, N. V. Semendyaeva |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Soil salinity
Gypsum Chemistry Soil Science Sodic soil 04 agricultural and veterinary sciences 010501 environmental sciences engineering.material 01 natural sciences Exchangeable sodium Agronomy Soil pH 040103 agronomy & agriculture engineering 0401 agriculture forestry and fisheries Soil horizon Composition (visual arts) Groundwater 0105 earth and related environmental sciences Earth-Surface Processes |
| Zdroj: | Eurasian Soil Science. 52:1429-1438 |
| ISSN: | 1556-195X 1064-2293 |
| DOI: | 10.1134/s1064229319110097 |
| Popis: | The studies were performed at the long-term stationary experiment on crusty hydromorphic solonetzes of the Baraba Plain during 1986–2017. In the humid year of 2013, the ground water level drastically rose from a depth of 250 cm to 50 cm, and secondary salinization was recorded. The content of soluble salts increased, their composition changed, the soil pH shifted to higher values, and the exchangeable sodium percentage increased. After lowering of the ground water table, salts were gradually washed out from the soil profile in the reclaimed solonetzes, and the positive effect of gypsum was partially restored. The soil adsorption complex was dominated by Mg2+ in the control variant and by Ca2+ in the reclaimed solonetzes. This phenomenon should be taken into consideration when reclaiming solonetzes, because the positive effect of gypsum application is preserved after secondary salinization. |
| Databáze: | OpenAIRE |
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