Növénytermelés / Volume 65 / Issue 2 (June 2016) / pp. 7-20
After 10 years of regular sewage sludge compost application we found an increase in parameters connected with organic matter content in the treatments of 9, 18 and 27 t ha-1 sewage sludge compost. The loss-on-ignition, the total carbon and nitrogen content, the humus and organic carbon content were higher in the treated plots compared to the control but significant treatment effect was found only in the highest dose treatment. In line with the organic matter input the intensity of decomposition processes increased, too. It was indicated by the elevated level of CO2 emission of soil.
Regular application of good quality sewage sludge compost resulted in favourable changes of soil chemical parameter connected with organic matter content. Quantitative and qualitative improving of organic matter content of soils are the basic requirement for safety plant production.
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János Nagy
Debreceni Egyetem
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