The influence of sewage sludge from dairy on yielding and some quality indices on grain of winter wheat
Tadeusz Filipek
Mirosław Fidecki
Paweł Harasim
Abstract
The sewage sludge was taken from a dairy located in Krasnystaw. The six experimental treatments, without organic fertilization – control, FYM, sewage sludge under liming and no liming conditions were established on brown soil. The dose of sewage sludge was comparable to the N dose applied with 35 t ha-1 FYM, i.e. 175 kg N ha-1 and it allowed to draw a direct comparison of both fertilizers. The sewage sludge contained higher concentrations of P, Ca, N and Na than farmyard manure. None of the heavy metals exceeded the maximum value in the sludge; therefore, it can be used for fertilization of the soil as well as higher plants. Sewage sludge should be treated as an organic matter. The application of sludge gave a higher crop of wheat, higher thousand grain weight and higher content of protein in grain comparing to the treatment without organic fertilization (control).
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