title: Modification of the137Cs,90Sr, and60Co transfer to wheat plantlets by NH4+fertilizers.
abstract: Inorganic fertilizers are used as agricultural countermeasures intended to inhibit the soil to plant transfer of radionuclides after a radioactive fallout. Two NH4+fertilizers, diammonium phosphate (DAP) and NPK, were applied to soil contaminated with a mixture of radionuclides to analyze whether they modify the transfer of137Cs,90Sr, and60Co and stable elements (K, Na, Ca, and Mg) to wheat plantlets grown under controlled laboratory conditions. DAP introduced NH4+in the soil, which can increase137Cs transfer, while NPK also introduced K+, which can decrease it. The application of DAP increased the accumulation of137Cs in wheat plantlets with increasing application rate, so did the137Cs/K in plantlets. Regarding the NPK application, the137Cs increased in all treatments, but at maximum rate, the available K introduced by the fertilizer was probably able to partially satisfy the nutritional requirements of the wheat plantlet and the137Cs decreased relative to the recommended rate. The137Cs/K ratio in plantlet decreased with increasing NPK rates. The transfer of90Sr increased with increasing DAP rate and only at the maximum NPK rate. The60Co transfer only increased at the maximum application rates for DAP and NPK. These modifications should be considered when using these fertilizers as agricultural countermeasures.
authors.affiliation: LARUEX, Applied Physics Department, Faculty of Veterinary Science, University of Extremadura. Avda. Universidad s/n, 10003, Cáceres, Spain. fguillen@unex.es.
authors.forename: J
authors.initials: J
authors.lastname: Guillén
authors.affiliation: LARUEX, Applied Physics Department, Faculty of Veterinary Science, University of Extremadura. Avda. Universidad s/n, 10003, Cáceres, Spain.
authors.forename: G
authors.initials: G
authors.lastname: Muñoz-Muñoz
authors.affiliation: LARUEX, Applied Physics Department, Faculty of Veterinary Science, University of Extremadura. Avda. Universidad s/n, 10003, Cáceres, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Baeza
authors.affiliation: LARUEX, Applied Physics Department, Faculty of Veterinary Science, University of Extremadura. Avda. Universidad s/n, 10003, Cáceres, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Salas
authors.affiliation: Department of Life and Environmental Physics, Horia Hulubei National Institute of Research and Development for Physics and Nuclear Engineering, 30 Reactorului Street, Ilfov, P.O. Box MG-6, 077125, Magurele, Bucharest, Romania.
authors.forename: N
authors.initials: N
authors.lastname: Mocanu
mesh_terms: D000641:Ammonia / Q000737:chemistry / Q000378:metabolism; D005308:Fertilizers; D019216:Metals, Heavy / Q000378:metabolism / Q000493:pharmacokinetics; D011868:Radioisotopes / Q000378:metabolism / Q000493:pharmacokinetics; D012989:Soil Pollutants / Q000378:metabolism / Q000493:pharmacokinetics; D014908:Triticum / Q000737:chemistry / Q000378:metabolism
chemical_list: D005308:Fertilizers; D019216:Metals, Heavy; D011868:Radioisotopes; D012989:Soil Pollutants; D000641:Ammonia
keywords: Co-60; Cs-137; Inorganic fertilizer; Potassium; Sr-90; Transfer; Wheat