Sadržaj nikla u uzorcima zemljišta tipa humoglej i na njemu gajene crvene deteline / Nickel content in soil samples from humogley and on it grown red clover
2015
Jakšić, Snežana (Institut za ratarstvo i povrtarstvo, Novi Sad (Srbija)) | Vasin, Jovica (Institut za ratarstvo i povrtarstvo, Novi Sad (Srbija)) | Vučković, Savo (Poljoprivredni fakultet, Beograd (Srbija)) | Marinković, Jelena (Institut za ratarstvo i povrtarstvo, Novi Sad (Srbija)) | Grahovac, Nada (Institut za ratarstvo i povrtarstvo, Novi Sad (Srbija)) | Tintor, Branislava (Institut za ratarstvo i povrtarstvo, Novi Sad (Srbija)) | Dozet, Gordana (Fakultet za biofarming, Bačka Topola (Srbija))
Production of high-quality roughage is influenced not only by the presence of nutrients, but also by the absence of harmful elements, such as heavy metals. Increased nickel content is found in soils formed on serpentinites, but it can also have anthropogenic cause due to application of waste and waste-water sludge, fertilizers, liquid manure, pesticides or vicinity of industrial facilities. In previous research, we found its high content around the mines. The aim of this study was to test total Ni content in humogley soil and its accumulation in red clover plants. The testing was performed at eight sites in Hetin, Vojvodina, during May of 2011, in the second year of red clover production. Soil samples for chemical and microbial analysis were taken from depths 0-30 cm and 30-60 cm. In order to determine Ni content in plant material and total Ni content in soil, samples were digested in closed microwave system under high pressure on Milestone Ethos 1, and determined by using ICP-OES Vista Pro-Axial Varian. Also, the microbial activity in the soil was high. Average value of total Ni content in soil was 40.9 mg/kg, which did not exceed the set maximum allowed concentration (MAC) for agricultural soils (50 mg/kg), except at one site in deeper layer was exactly 50.2 mg/kg. Average Ni content in the tested red clover plants was 0.9 mg/kg. This is below average critical and toxic concentration of Ni in crops and the tolerance level for cattle feed. High Ni values in feed can enter food chains and pose a potential threat to human health. Because of that further control of nickel content in soil is necessary.
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