Potapenko L. Optimization of the fertilizers system for potatoes on sod-podzolic soil in the Polesie zone

Object - the following processes had attention: optimization of nutrient regime, soil's biological activity, migration of nutrients in the system "soil-plant-fertilizer" and photosynthetic activity of plants that determined potato yield capacity. Purpose - optimization of potato fertilizer system under the sod-podzolic soil conditions in the left-bank Polissia within traditional and alternative inputs. Methods - field, lysimeter and laboratory experiments with comparative calculating, mathematical and statistical processing. Theoretical results - was developed new direction in potato farming toward resource and energy saving by the replacing traditional fertilizer inputs (farmyard manure and NPK) to the alternative one (green manure and Bioproferm). Applying of bacterial inputs (Hetomix and Bioproferm) was theoretically justified as the way of biological farming in the Polesye. Practical results - on the base of agrochemical, natural, ecological and energy-economic assessment the perspective of replacing farmyard manure on the green manure and multipurpose compost (Bioproferm) in the grain-potato rotation was demonstrated. Moreover, alternative inputs provided the same yields and crop quality and at the same time reduced expenses on the 40-60% and increased efficiency of farm technology in the 1,5-1,7 times. Novelty - was proposed new ways of optimization of potato fertilization system under sod-podzolic soil conditions in the left-bank Ukrainian Polesya. It was established agronomy, agrochemical and agroecological assessment of traditional and alternative fertilization systems with using Bioproferm. This is organic fertilizer of new generation, produced by organic waste biofermentation. Besides it was conducted nutrients migration out of root zone soil area with using different fertilizer inputs. Biogran and Hemitox showed their efficiency and ability to improve fungistastical data, soil's biology activity, yield capacity and crop quality. Degree of application - was carried out the manufacturing inspection of alternative fertilizer system in 2011 on an area of 32 hectares in the LLC "Agroresursy - 2006" Mensky district, Chernihiv region and the introduction of a variety of potato Malitch in 2012 on an area of 120 hectares in the experimental farm "Levon - S" Chernigov district Chernigov region. The field is agriculture.