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ЛУГОВЕДЕНИЕ И ЛУГОВОДСТВО
ͪКормопроизводствоͫ № 6, 2015
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THE EFFICACY OF MINERAL FERTILIZERS’ APPLICATION
ON THE NATURAL SWARD OF A FLOODPLAIN MEADOW
L.P. Kharkevich, Dr. Agr. Sc.
S.F. Chesalin, PhD Agr. Sc.
N.K. Zholudeva
A.P. Serdyukov
L.M. Baturo
Department of Agrochemistry, Soil Science and Ecology, Bryansk State Agrarian University
243365, Russia, the Bryansk region, Vygonichskiy rayon, selo Kokino, Sovetskaya str., 2a
E-mail:
Applying a complex of agrochemical methods to a natural sward can provide yield increments as well as a signifi-
cant reducƟon in radionuclides’ income with livestock diets. Influence of ferƟlizers on hay yield and quality of pe-
rennial grasses was studied on a natural sward in a long-term field trial. Effect of N on the background of PK fer-
ƟlizaƟon, and the influence of increasing potassium rates on the background of constant NP doses were invesƟ-
gated. Ammonium nitrate, granular superphosphate and KCl were used. N and K ferƟlizers were applied equally
before the first and the second cuts; P was applied once before the first cut. The rates of mineral ferƟlizers opƟ-
mal for hay quanƟty and quality were detected. The combinaƟon of N, P and K had the greatest effect on the pro-
ducƟvity, N ferƟlizers increasing 137Cs concentraƟon in hay. K had a contrary effect on 137 Cs concentraƟon. The
obtained feed quality directly depended on the mineral nutriƟon: the content of crude protein, carotene, phos-
phorus and potassium, and the amino acid composiƟon improved. Nitrate content did not exceed the standards
(0.5 % DM). All the differences caused by ferƟlizaƟon were significant; the greatest increase throughout the three
years of experiment followed N60 Р60К90 applicaƟon.
Keywords: natural sward, mineral ferƟlizers, protein, nitrates, 137Cs.
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