METHODOLOGICAL ASPECTS OF DETERMINING THE TREND
OF ORGANIC MATTER MINERALIZATION↔SYNTHESIS
PROCESSES IN CROPLANDS
V. V. Volkohon, O. V. Pyrig, K. I. Volkohon, S. B. Dimova
Institute of Agricultural Microbiology and Agro-Industrial Manufacture,
National Academy of Agrarian Sciences of Ukraine
97, Shevchenko Str., Chernihiv, 14027, Ukraine
E-mail: firstname.lastname@example.org, email@example.com, firstname.lastname@example.org,
Received January 11, 2019 / Received February 15, 2019 / Accepted March 22 , 2019
Aim. To determine the peculiarities of N2
O and CO2
soil emissions under different systems of crop
Methods. Field experiment, gas chromatography. Results. The data obtained during the permanent fi
experiment on leached chernozem with crop rotation including potatoes, spring barley, peas and
have shown that both absolute (N2
O) and specifi c (relative to carbon losses in the form of СО2
nitrogen depend on crop fertilization system. The introduction of raw organic material to the soil
in the form
of cattle manure or lupine (green manure) has led to the increased CO2
emission levels. However,
nitrogen losses in the form of N2
O (g N-N2
) have remained at the control level. The
mineral fertilizers (under the absence of raw organic material) have triggered N2
O emissions and
production of CO2
(up to 67 % in the variant with the highest dose of mineral fertilizers (N120
of active ingredient), which can be caused by the mineralization of humus compounds. In
fertilization system the specifi c losses of nitrous oxide have not exceeded the control and fallow.
the obtained results the authors propose the method of determining the “mineralization-synthesis”
organic matter in agricultural soils for estimation of the orientation of biological processes under
crop growing conditions. Conclusions. Systemic application of mineral fertilizers without
of raw organic material leads to the misbalance of mineralization and synthesis processes in soils.
such conditions the mineralization of organic matter is prevailing. The use of organic and
fertilizers has balanced these processes in the soil. The proposed methodological approach for
of mineralization-synthesis indices is based on the emission ratio of g N-N2
reference values and can provide an objective view of the tendency of mineralization (negative ratio
and synthesis (positive ratio values) processes in the soils. It provides grounds to the
of agricultural crops fertilization or introduction of certain agronomic techniques.
O soil emissions, CO2
soil emissions, crop fertilization, mineralization, synthesis, organic
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