Rassadina I. Optimization of mineral nutrition of spring false flax on podzolized black soil in the Right-Bank Forest-Steppe of Ukraine

Object - the relationship between the nutritional regime of the chernozem podzolized Right Bank Forest-Steppe of Ukraine, the doses, forms, timing and methods of introducing mineral fertilizers and the productivity of false flax spring. Purpose - to improve the system of fertilizer false flax spring due to optimization the forms, doses, timing and methods of using mineral fertilizers to obtain high yields of quality seeds on chernozem podzolized Right Bank Forest-Steppe of Ukraine. Methods - fields, analytical, laboratory-field, mathematically-statistical and for settlement-comparative. Theoretical results - developed the theoretical approaches to addressing of optimization of process of mineral nutrition of false flax spring plants, based on the an integrated approach to assessing the of plant response to of the soil of nutrient regime change under the action fertilizers. Role is installed of major nutrients in productivity false flax spring, identified by their units costs for the formation of the harvest. Practical results - the system of application of mineral fertilizers for a false flax spring is substantiated and developed, which significantly increases the yield and raises the quality of the seeds of this crop. The optimal form and dose of nitrogen fertilizers is determined, and effective methods for application of mineral fertilizers are proposed. The expediency of local application of mineral fertilizers prior to sowing of false flax spring is substantiated, which ensures high economic efficiency. Novelty - for the first time the effectiveness of the forms, doses, timing and methods of application of mineral fertilizers for false flax spring has been established in the conditions of the Right-bank Forest-steppe of Ukraine on podzolized chernozem, and an optimal fertilizer system has been developed that provides seed yields of 2 t/ha with an oil content of more than 40 %; the advantages of using ammonium sulphate as a substitute for ammonium nitrate are proved, which makes it possible to reduce the dose of nitrogen addition by 30 %; regularities of the influence of various forms, doses, timing and methods of fertilizer application on the nutrient regime of the soil, the dynamics of plant growth and development, the assimilation of basic nutrients, the formation of yields and the quality of false flax spring seeds; the balance of basic nutrients in the soil and its intensity are determined taking into account the fertilizer and the use of straw for fertilizer; the coefficient of the use of nutrient elements from fertilizers with red dill with a different dose of their application on chernozem podzolized Right Bank Forest-steppe of Ukraine is specified. Degree of application - basic results of the thesis was implemented during the cultivation of the false flax spring in agricultural enterprises "Papugintsy" of the Talnivsky district of the Cherkassy region on an area of 15 ha and "Condor" of the Ulyanovsk district of the Kirovograd region on an area of 10 hа. The field is agriculture.