[Yield and content of the main nutritive elements in perennial cereal grasses in the conditions of cultivating on drained peat-boggy soil]
2007
Kasyanchik, S.A.,National Academy of Sciences of Belarus | Ustinova, A.M.,National Academy of Sciences. Scientific and Practical Center for Arable Farming (Belarus). Institute for Soil Science and Agrochemistry
Problems of maintaining and conservation of peat-boggy soils fertility and increasing of agricultural crops yielding capacity were analyzed. Principles of nutrients formation and their accumulation in plants under the influence of yield formation factors including fertilizers were stated. Research results of the analysis of the influence of different levels of phosphorous-potassium and nitrogen fertilizers on crops yield and the content of the main nutritive elements in perennial grasses cultivated on drained peat-boggy soils of the lowland type of the Belarusian Poozeriya included into crop rotation after the drainage system reconstruction were presented. Research results showed that N80-120P50-70K230-300 was the optimal dose of mineral fertilizers for perennial grasses that provided the basis for obtaining 112.0-161.4 c/ha of dry substance or 66.3-95.5 c/ha of feed units and the recoupment of 1 kg of fertilizers by 19.4-24.4 kg of dry substance. Besides, the observed dose promoted the increasing of the concentration of the basic nutritious elements in plants. First hay crop grasses contained in dry substance 2.68-3.38% of general nitrogen, 0.30-0.32% of phosphorus, 2.60-3.38% of potassium. At the same time, second hay grasses contained the surplus accumulation of total nitrogen and potassium. Optimal dozes of mineral fertilizers exerted the favorable influence perennial grasses resistance to the unfavorable conditions of vegetation period
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