Influence of different fertilization and chemical recruitment systems on the phosphorus regime of gray forest soil

Abstract

Phosphorus is extremely important in agriculture. This is due to the fact that without its participation in the plant body does not undergo any biochemical reaction, because it is part of the ATP molecule, which provides energy. It is an essential element of nucleic acids, phospholipids and the others is actively involved in the regulation of enzymatic reactions. It is part of human, animal, plant and bacterial cells. The research was conducted on the basis of a stationary experiment conducted in 1992 on gray forest coarsegrained light loam soil, studied the effect of long-term chemical reclamation and various fertilization systems (mineral, organic, organic-mineral) on the transformation of Optimal phosphorus nutrition promotes the development of the root system, which improves the supply of plants with moisture and nutrients, increases the share of marketable products in the organic crop, increases the starch content in potatoes, sugar in roots, vegetables and fruits, oilseeds, oilseeds the output of a long fiber, its strength increases. That is why the management of phosphorus nutrition of plants is one of the key issues. Changes in various forms of phosphorus (gross, mobile, water-soluble) under the influence of the above factors are analyzed. For a more objective assessment of these factors on the phosphate regime of the soil on the variant results of the analysis were compared not only with absolute control, but also tied to baseline (age of fallow 28 years), located next to the experimental field. It was found that the content of gross phosphorus, which characterizes the genetic characteristics of the soil, depends almost entirely on the total humus reserves and clearly repeats the parameters of the profile accumulation of carbon, taking into account the depth and thickness of humus horizons. The particle size distribution is of great importance in the processes of gross phosphorus accumulation, as defects are quite easily adsorbed on the surface of soil structures. Evaluation of the results of the analysis shows a large gap in the gross forms of phosphorus and low concentration of its mobile forms, the content of which is 4.7% of the total. According to our data, water-soluble salts of phosphoric acid in gray forest soil are generally found in very small quantities (0.62 mg / kg in the horizon NOT with a gradual decline down the profile), which often becomes a limiting factor in phosphorus nutrition of crops. Lime, by reducing the activity of one and a half oxides, weakens the adsorption bonds of phosphorus and increases the relative amounts of calcium phosphates. The application of mineral fertilizers replenished the pool of gross phosphorus (by 0.08% of the control dock), but mobile forms of phosphorus (according to Kirsanov) increased by only 23 mg/kg, which was second only to liming. In general, the effect of liming significantly increases the use of soil phosphates and fertilizers.