• • • Improvement of contaminated forage lands after the Chernobyl accident
The investigation tested the effectiveness of tillage and chemical treatment, aimed at obtaining of green and roughage feeds (hay), meeting the health-based exposure limit of 137Сs specific activity. It took place in the Bryansk region in 2014–2016 on the long-term trial field, used from 1994 in the central floodplain of the Iput River. Soil contamination density by 137Сs averaged to 559–867 kBq/m2 in the period of the experiment. Agrocenosis consisted of meadow fescue (6 kg ha-1), common foxtail (5 kg ha-1) and reed canary grass (7 kg ha-1). Cultivation complex comprised disking by harrow BDF-2.4 and plowing by double deck plow PYA-40 at the depth of 40 cm. Fertilization happened fractionally: 1/2 of NK rate and full dose of P — before the first cut and 1/2 of NK rate — before the second one. 137Сs migration within a food chain depended on tillage method and fertilization. Plowing gave the most significant effect. Migration of 137Сs within the food chain was estimated (from fodder — into milk and meat). Rate of N:K, being 1:1.5 resulted in decrease of 137Сs specific activity in animal products and internal dose in human body, meeting the Radiation Safety Standard, irrespective of tillage technique.
Source:http://kormoproizvodstvo.ru/en/2-2018-2/ , p. 11
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