Determination of the doses of ameliorants for conducting a field experiment to reduce alkalinity on alluvial meadow soils of the floodplain of the Kuma river, Stavropol Territory
| Autor: | V. P. Yegorov, A. V. Chernov, V. A. Chernov |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Agrarian science. :99-101 |
| ISSN: | 2686-701X 0869-8155 |
| DOI: | 10.32634/0869-8155-2020-341-9-99-101 |
| Popis: | Relevance. In the Stavropol Territory, the area of arable land with a pH of 8.5-9.0. in the arable horizon as of 01.01.2020 — 930891 hectares, which is 23.8% of the total arable land in the region. The decrease in alkalinity, especially under perennial plantations, alternative phosphogypsum ameliorants such as organic acids, has been little studied. The results of studying the degree of influence of organic acids on the reduction of soil alkalinity will help to establish the doses, methods of application and the economic effect of reclamation of such soils. Material and methods . The object of research was an alluvial meadow calcareous weakly solonetzic weakly saline soil of the Kuma river floodplain with an initial pH of 8.61 units. The research scheme consisted of six variants of ameliorant doses with control in triplicate. Results. The study of the effect of ameliorants on the soil has shown that they contribute to varying degrees of decrease in alkalinity. The best results in reducing alkalinity with an application dose of more than 500 kg/ha were noted for malic acid, followed by tartaric, citric acids and phosphogypsum. A significant effect of organic acids was noted at the application rate from 700 kg/ha, where the decrease in the pH was 0.13–0.19. At a dose of organic acids application of 1000 kg/ha, the decrease in the pH value from control was 0.17–0.26 units, at 5000 kg/ha, the pH decreased within 0.58–0.65. |
| Databáze: | OpenAIRE |
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