Effects of Sewage Sludge Compost on Carbon, Nitrogen, Phosphorus, and Sulfur Ratios and Soil Enzyme Activities in a Long-Term Experiment

Agronomy, Journal Year: 2025, Volume and Issue: 15(1), P. 143 - 143

Published: Jan. 9, 2025

The carbon, nitrogen, phosphorus, and sulfur (CNPS) ratios of soils are known to be relatively stable parameters, characterizing different land uses. We hypothesized that the long-term application sewage sludge compost (SSC) would not change these but increase concentration elements quality organic matter (OM), as well soil enzyme activities. Hence, chemical microbiological properties were studied in a 20-year experiment. plots grouped into five blocks treated every third year with SSC at rates 0, 9, 18, or 27 t ha−1. Three plants, crop rotation, tested sown follows: rye, rye hairy vetch, maize. results showed basic parameters (pH, OM content, E4/E6 ratio, NO3-NO2-N, AL-P2O5, moisture content) increased, along doses for rye. Similar trends found CNPS concentrations, β-glucosidase, alkaline phosphatase activities, while acidic activity was reduced. C:N, C:S, N:S affected by application. main factors treatment effects plant-available phosphorus (ammonium lactate (AL)-soluble P2O5), total P, based on principal component analysis. canonical correspondent analyses revealed activities C:P, N:P β-glucosidase correlated P forms pH strongly all enzymes. Based role microbes became more important increasing mobilization. conclude addition could improve health through pH, OM, nutrient microbial activity. Also, some elemental have an regulation

Language: Английский

Rapid on-site maturity and stability assessment of sewage sludge compost by mathematical treatment of UV and fluorescence spectroscopic data

Waste Management Bulletin, Journal Year: 2025, Volume and Issue: 3(2), P. 1 - 9

Published: March 1, 2025

Language: Английский

The Impact of Exogenous Organic Matter on the Properties of Humus Compounds of Soils Developing on a Reclaimed Fly Ash Landfill

Sustainability, Journal Year: 2024, Volume and Issue: 16(23), P. 10579 - 10579

Published: Dec. 3, 2024

Fly ash does not contain organic matter to initiate soil-forming processes and the proper development of plant cover. Therefore, in reclamation fly landfills, an integrated approach is required, including introduction exogenous into top layer ash. This study assessed changes content quality soils developing on a reclaimed landfill. included areas without EOM (RV_1—the direct plants) with (RV_2—surface humus RV_3—sewage sludge). In samples taken 15 years after reclamation, contents total carbon (TOC) nitrogen (TN), fractional composition matter, susceptibility oxidation, soil management indices (carbon pool index (CPI), C lability (L), (LI), (CMI)) were determined. The results showed that use dump significantly increased improved parameters thus influenced initiation process accumulation. RV_1 soil, accumulation resources was only found topsoil. An increase 15–40 cm noted variants which introduced (RV_2 RV_3). Carbon transformations covered layers these closely related inflow. interdependence CPI L most beneficial sewage sludge. this reclaiming variant, CMI had value above 100, indicates process. Significant differences between confirmed by means PCA based indicators. indicators favorable variant RV_3. obtained has effect Technosols

Language: Английский