Uman NUH | today: 09/10/2019

The balance of nitrogen in the soil after a long application of fertilizers in crop rotation

Author(s) Hospodarenko G.M., Doctor of Agricultural Sciences, Professor, Uman National University of Horticulture, Ukraine
Prokopchuk I.V., Candidate of Agricultural Sciences, Associate Professor of Soil Science and Agricultural Chemistry, Uman National University of Horticulture
Nikitina O.V., , , Uman National University of Horticulture, Ukraine
Category The Agronomy
year 2017 issue Випуск №90. Частина 1
pages 7-14 index UDK 632.1 : 631.8
DOI
Abstract In recent years, in agriculture of Ukraine there has been a negative trend to a decrease in inventories and, consequently, to a negative balance of nutrients in the soil. And in first place among the macronutrients nitrogen comes out with a negative balance, and thus is the main limiting element. Formation of a crop and its quality. The article presents the results of nitrogen balance studies at different levels and systems, manure nitrogen removal and according to its balance chernozem podzolized heavy loamy. Indicators of its receipt of manure and fertilizers, as well as due to symbiotic nitrogen fixation clover and peas. Based on the results of the research it was found that in all systems and levels of nitrogen fertilizer use average balance is negative - from -67.3 to -109.0 kg / ha of crop rotation. At the same time, provided the abandonment of crops by-products in the field of surface removal of nitrogen is significantly reduced. In spite of the negative balance, its value decreases significantly (-14.3 to -60.4 kg / ha), while the organo-mineral fertilizer system is even a positive nitrogen balance in the soil -10.1 kg / ha in variant of the experiment 13 Manure 5 t / ha + NPK. Therefore, to comply with the sufficient balance of nitrogen in the crop rotation of cultivated grain-type and, accordingly, improve soil fertility is necessary along with the application of organic and mineral fertilizers to leave the field as fertilizer monetized part of the crop.
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