Abstract

It is shown that sewage sludge formed during sewage treatment contains a significant amount of organic matter, nitrogen, and ash elements, which can be used by plants. The paper presents the results of a 3‑year microplot experiment on sod-podzolic soil to determine the effect of sewage sludge added together with sawdust, peat, and straw at different ratios (the total rate was 60 t/ha). The parameters of the soil organic matter regime (content, reserves, and group and fractional composition) were studied. The substrates used with sewage sludge led to a significant increase in all parameters compared to the control experiment (without fertilizers). A trend towards a decrease in the fertilizing effect was observed when the ratio between sewage sludge and additional organic components increased from 1 : 1 to 1 : 3. Fresh sludge used together with peat or sawdust at a 1 : 1 ratio proved to be more effective than the compost based on sewage sludge.

中文翻译：

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Sod-Podzolic土壤的污泥和有机质制度的利用

摘要

结果表明，在污水处理过程中形成的污水污泥包含大量有机物，氮和灰分元素，可被植物使用。本文介绍了在草皮土壤上进行的为期3年的微区试验的结果，以确定污水污泥与木屑，泥炭和稻草以不同比例（总流量为60吨/公顷）一起添加的效果。研究了土壤有机质状况的参数（含量，储量以及组和分数组成）。与对照实验（不使用肥料）相比，用于污水污泥的基质导致所有参数的显着增加。当污水污泥与其他有机成分之间的比例从1：1增加到1：3时，观察到施肥效果下降的趋势。