Year 2015, Volume 61, Issue 4

Year : 2015
Volume : 61
Issue : 4
   
Authors : Konstantin KORLYAKOV, Antonina KOSOLAPOVA, Venera YAMALTDINOVA
Title : IMPACT OF FERTILIZATION ON CROP YIELDS AND SOIL STATUS WITH EMPHASIS ON HEAVY METALS
Abstract : Long-term study of organic, mineral and complex fertilization systems was fulfilled on experimental plots of Perm Agricultural Research Institute in 1993-2010 years. Stationary experiment was founded in 1969. Average yields in fourth and fifth rotations varied from 2650 to 3859 FU ha-1 as influenced by fertilization systems. All studied systems provided yields raising compared with control treatment (no fertilizers). The highest grain yield supplements were obtained for spring wheat (from 0.47 to 1.55 t ha-1) and oat (from 0.54 to 1.02 t ha-1). Essential advantage of complex fertilization systems was determined. Using these systems guaranteed raising of all soil fertility basic parameters, including humus, mobile phosphorus and potassium content, soil microbiological activity, and positive basic nutrition elements balances. The maximum grain yields (up to 3.85 t ha-1 for spring wheat) but minimum crop returns were obtained from combination of manure total rate 160 t ha-1 within rotation and equivalent mineral fertilizers application (fertilizers rates are defined according the nutrients quantity in manure). The highest net returns were gained after mineral fertilizers application. Mineral fertilizers and farmyard manure (FYM) may be the sources of heavy metals contamination. The essential pollution by heavy metals in agricultural product and soil was not noted in given studies after long-term (about forty years) manure and mineral fertilization.
For citation : Korlyakov, K., Kosolapova, A., Yamaltdinova, V. (2015): Impact of fertilization on crop yields and soil status with emphasis on heavy metals. Agriculture and Forestry, 61(4): 93-99.
Keywords : fertilization system, farmyard manure, crop rotation productivity, nutrient balance, heavy metals content
   
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ISSN 0554-5579 (Printed)
ISSN 1800-9492 (Online)
DOI : 10.17707/AgricultForest
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