Impact of wastes application on selected soil quality parameters

On the basis of a field experiment, the influence of organic wastes application on the balance and the fractional composition of organic matter in light soil was investigated. The scheme of the experiment consisted of three blocks with 6 randomized treatments each: control treatment, without fertilization (0); NPK mineral fertilization (NPK); farmyard manure (FYM); sawdust from a sawmill + waste lime from a sugar factory (T(l) + Ca(dcf)); sawdust from a workshop + waste lime from a sugar factory (T(rz) + Ca(def)); and waste lime from a sugar factory(Ca(def)). The level of soil organic carbon accumulation under conditions of wood and food industry wastes application shows that a significant positive change in the soil occurred. The applied fertilization affected changes in the fractional composition of humus, which was manifested in the increase of stable fractions (the humins) as well as a change in C(KH) : C(KF) ratios. With regard to the positive influence on the quality of humus compounds, the studied substances were ranked as follows: FYM > T(rz) + Ca(def) > T(l) + Ca(def) > Ca(def).