Feedstock and transformation processes drive the valorization of agro-livestock waste for a circular agriculture
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View abstract on PubMed
Summary
This summary is machine-generated.Circular economy strategies transform agro-livestock residues into beneficial soil amendments. Compost and digestate offer nutrients, while biochar improves soil, but careful feedstock selection is crucial to avoid phytotoxicity.
Area Of Science
- Agricultural Science
- Environmental Science
- Soil Science
Background
- Modern agriculture faces challenges like soil degradation and climate variability.
- Synthetic fertilizers pose environmental risks and threaten food security.
- Circular economy principles offer sustainable solutions through agro-livestock residue valorization.
Purpose Of The Study
- To comprehensively assess various organic materials as bio-based soil amendments.
- To evaluate their physicochemical properties, nutrient content, and phytotoxicity.
- To determine their suitability for regenerative agriculture.
Main Methods
- Characterization of composts, digestates, and biochars (physicochemical, elemental, thermogravimetric).
- Trace element analysis and phytotoxicity testing using barley germination assays.
- Correlation analyses to link material properties with agronomic performance.
Main Results
- Compost and digestate amendments showed beneficial traits: high nutrients, neutral pH, and labile organic matter.
- Lignocellulosic biochars had optimal carbon content and stability within regulatory limits.
- Some biochars (wool, digestate) and compost/digestate leachates exhibited phytotoxicity due to heavy metals or salinity.
Conclusions
- Composts, digestates, and biochars play complementary roles in regenerative agriculture.
- Feedstock selection, pyrolysis optimization, and amendment blending are key for improving soil amendment performance.
- Sustainable management of agro-livestock residues is vital for soil health and food security.
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