Trace Elements in Medicine (Moscow)
2016, 17(4): 39-43
ZINC IN THE SYSTEM «SOIL – PLANT – MAN» IN THE CONDITIONS OF CENTRAL SIBERIA
A.E. Pobilat¹, E.I. Voloshin²
1 Krasnoyarsk State Medical University, Partizan Zheleznyak str. 1, Krasnoyarsk 660022, Russia
2 Krasnoyarsk State Agricultural University, Mira ave. 90, Krasnoyarsk 660049, Russia
ABSTRACT. The content of zinc in uncontaminated soils of Central Siberia was found to vary within 9.4–115.0 mg/kg. The average content of zinc on the studied area of 2,536 million hectares was 25.3 mg/kg. The highest concentration of zinc was detected in soils of subtaiga and Kansk forest-steppe zone, and the smallest one was in Minusinsk forest-steppe. Spatial distribution of zinc in different natural zones of the territory is connected with considerable diversity of soil cover, with differences in particle size and mineralogical distribution of soils and concentration of the element in soil-forming rocks. It was revealed that soils of the agricultural part of the region have low and average supply of mobile zinc. The largest areas of soils with deficiency of zinc were observed in the Achinsk-Bogotol, Minusinsk, Nazarovo and Chulym-Yenisei forest-steppe zones. Insufficient supply of zinc in the soils is connected with low mobility of this element. The mobile form of zinc in the majority of soils makes 0.8–5.5% of total content. It was shown that the increased humus cover of regional soils (the average content is 6.5%) and the near neutral pH (average 5.9) facilitates the reduction of bioavailability of this element for plants. In grain yield, forage and vegetable crops the deficiency of zinc was noted that leads to loss of vegetable production quality. Optimization of plants nutrition with macro- and trace elements is necessary for the improvement of production quality. Complex application of organic fertilizers and microfertilizers will promote the improvement of trace element composition of plants, increasing quality parameters of the production (starch, protein, sugar, vitamins, nutritional value of forages etc.) with saving their ecological safety.
KEYWORDS: zinc content, distribution, safety, deficiency, optimization, microfertilizers.Corresponding author: A.E. Pobilat; E-mail: email@example.com