ORGANIC CARBON STOCKS AND LOSSES IN SOD-PODZOL SOILS OF THE CENTRAL POLISSYA AGROCENOSES OF UKRAINE
Journal Title: «Таврійський науковий вісник» - Year 2018, Vol 104, Issue
Abstract
The article presents the results of studying organic carbon reserves and losses in sod-podzol soils of Polissya agrocenoses over a 30-year-long period. Based on the results of long-term observations conducted on the monitoring sites of the state network by the Institute of Soil Conservation of Ukraine, the scale of the organic matter loss was determined, the main determinants and their structure were identified. It was revealed that among the main factors causing the loss of soil organic matter the following should be highlighted: the system and intensity of their use during crop growing, temperature increase and carbon dioxide emission. It was found that at the beginning of the investigated period, the reserves of organic carbon, depending on the particle-size distribution and hydromorphic rate of sod-podzol soils, fluctuated in the range from 20.5 to 29.6 t/ha. The average loss values in these soils, calculated per 1 hectare of arable land, are about 120 kg. It was determined that annual CO2 emission losses in sod-podzol soils during the study period varied in the range from 3.7–6.9 to 5.5–10.2 kg/ha/year-1. It is shown that soil organic matter losses occurred simultaneously with the permanent decrease in fertility indicators. It was found that in the general pattern of the loss of soil organic carbon, average annual emissions account for 3.–8.5 % of the average annual Corg loss from 1 ha of arable land. The rest of the factors causing soil losses make up about 90 % of the loss total value of the organic matter
Authors and Affiliations
П. І. Трофименко, Н. В. Трофименко
Keywords
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