Halogen content modification in the soil-plant system under agrocenosis conditions
The aim of our research was to study halogen content modification in the soilplant system under agrocenosis conditions during a long-term application of mineral fertilizers under soil-climatic conditions of Western Siberia. We started the experiment in 1988 on virgin grey forest soil. During the first years, we cultivated vegetable crops in rotation, and since 2000-potatoes. In the autumn of 2013, we selected some samples of different soil layers up to 1 m with the help of a soil tube, as well as tubers and potato tops. In the long-term stationary experiment we studied the effect of increasing doses of potassium introduced on the NP background on agro-ecological condition of agrocenosis, including the behavior of halogens in the soil-plant system. Our investigation showed the importance of optimizing mineral nutrition of plants to obtain high and stable yields. The results of these studies also confirm the essential role of mineral nutrition of plants for the effective functioning of agroecosystems. Perennial fertilization led to accumulation of fluorine in the soil, mainly in the upper profile. However, the fluorine content in the soil does not exceed the maximum permissible concentrations. Different intensity of use of mineral fertilizers in agrocenosis affected the release of halogens in the plant. The concentration of halogens in the vegetative parts (leaves, stems) was significantly higher than in the storage organs (tubers). The fluorine content in potato plants was the highest when using only NP-fertilizers; balanced nutrition (NPK) contributed to a significant reduction of fluorine in plants. With increasing doses of KCl introduced in potato plants, the concentration of chlorine and iodine increased. In general, the concentrations of halogens in the main and incidental agrocenosis plant production with a long-term use of substantially high doses of fertilizers do not exceed environmentally dangerous levels.
Keywords
halogen, plant, soil, agrocenosis, галогены, растения, почва, агроценозAuthors
Name | Organization | |
Konarbaeva Galina A. | Institute of Soil Science and Agrochemistry, Siberian Branch of the Russian Academy of Sciences (Novosibirsk) | konarbaeva@issa.nsc.ru |
Yakimenko Vladimir N. | Institute of Soil Science and Agrochemistry, Siberian Branch of the Russian Academy of Sciences (Novosibirsk) | yakimenko@issa.nsc.ru |
References
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Halogen content modification in the soil-plant system under agrocenosis conditions | Vestnik Tomskogo gosudarstvennogo universiteta. Biologiya - Tomsk State University Journal of Biology. 2014. № 3 (27).