Salo L. Phosphatic conditions of peat low-laying area soils and efficiency of phosphoric fertilizers under long-term herbages

Object - conformities to the law of influencing of the systematic bringing of fertilizers on the nourishing mode of peat soils that their productivity. Purpose - to learn the features of forming of the phosphatic mode of peat low-laying area soils depending on application of phosphoric fertilizers, the norms of their bringing at growing of long-term herbages are recommended. Methods - the field experiments, analytical and comparative-computation methods, mathematical statistics. Theoretical results - the character of transformation of phosphatic fund of peat low-laying area soils is certain under act of phosphoric fertilizers depending on material well-being of soil by mobile connections of phosphorus. The phosphatic capacity of absorption, kinetics of sorbtion of phosphate-ions and character of migration and transformation of phosphorus of fertilizers, in the type of peat soils is certain. Influence of increasing doses of phosphoric fertilizers on a harvest is set, quality of long-term herbages. The character of dynamics of receipt of phosphorus of fertilizers in the plants is certain. Practical results - the coefficients of the use of phosphorus of fertilizers and soil are expected by cereal herbages. The differentiated doses of phosphoric fertilizers at growing of long-term herbages on a hay on peat low-laying area soils taking into account a different phosphatic level are set. To production it is recommended on a background nitric-potassium fertilizers (N120 K180) to bring in the phosphoric fertilizers on soils with low maintenance 90 kg/ga P2O5, on soils with middle maintenance - 30kg/ga P2O5, that promotes the level of productivity of hay on 29,2% and 11,6% accordingly. Novelty - consists in the ground of necessity of application of phosphoric fertilizers on peat low-laying area soils. First for the western non-black area of Russia and polesskoy area of Ukraine transformation of phosphorus of fertilizers for the basic groups of soil phosphates depending on the level of material well-being of soil is set by phosphorus; conformities to the law of sorbtion of phosphates in peat low-laying area soils depending on a phosphatic level and depth of soil layer are set (with the use of the radioisotope mark 33P); migration of the borne phosphorus of fertilizers in the type of peat soil of a different level of phosphatic material well-being is studied (with the use of the radioisotope mark 33P); the dynamics of receipt of phosphorus of fertilizers in the plants during vegetation of herbages depending on mowing (with the use of the radioisotope mark 33R) is set, that enables exactly to set optimum doses and terms of bringing of phosphoric fertilizers. Degree of application - dissertation job performances are a basis for the improvement of existent methods of complex decision of problems of rekultivation of the produced peat soils. Some positions of dissertation work can be used in an educational process at the study of disciplines of soil science and agricultural chemistry. The field is agriculture.