engleski

Does mineral and organic fertilization affect CO2 emissions and soil quality?

Agricultural sector is one of the major source of CO2 due to increased decomposition of soil organic matter caused by disturbance various agricultural practices such as fertilization, tillage and irrigation. The objectives of this study were to determine the influence of mineral and organic fertilization in winter wheat agroecosystem on CO2 respiration and soil quality. Field experiment was conducted in Potok near Popovača, where soil type is drained lowland distric Stagnosols. Investigated period (2016) was characterized by higher annual precipitation than average (+159 mm), higher average annual temperature (+1.5 °C) and real evapotranspiration (+30 mm). Four investigated treatments were OF (organic fertilization – 40 t/ha of solid farmyard mixed manure), MF (mineral fertilization – 300 kg N/ha), C (control treatment) and BF (black fallow). Mean annual values of C-CO2 flux ranged from 7.8 kg/ha x day (BF) to 21.9 kg/ha x day (OF) and were statistically significant. Annual yield ranged from 1.12 kg/ha (C) to 7.37 t/ha (MF) and values were statistically significant (SAS 9.1: p < 0.05). Organic matter content in soil ranged from 1.39 % (C) to 2.80 % (OF). Application of organic and mineral fertilizers and calcification had influence on soil chemical characteristics and daily C-CO2 flux, but not on average annualy emissions.

soil respiration, calcification, winter wheat, yield, C-CO2 flux

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