article · Processes
Agricultural soils benefit from organic supplements, but the specific influence of biochar on soil enzyme activity requires clearer understanding in certain regions. Over a three-year field study, researchers evaluated the impact of six different soil treatments, including biochar, compost, compost combined with biochar, biochar with compost tea, fescue, and an untreated control. The treatments were assessed for their effects on soil pH, organic matter, cation exchange capacity, and vital soil enzymes such as phosphatases, cellulase, urease, and dehydrogenases. The findings reveal that treatments containing compost and biochar substantially increased soil enzyme activities in comparison to other methods. Applying nitrogen raised these enzyme activities even further. Key soil indicators including pH, organic matter, and cation exchange capacity were critical in driving enzyme performance, demonstrating that biochar and compost amendments boost biological and physicochemical health in agricultural soils.
Enzymes in soil play a critical role in nutrient cycling and overall soil fertility. Understanding how soil amendments like biochar and compost affect these biological catalysts allows land managers to implement practices that sustain soil productivity, improve organic matter, and maintain vital agricultural ecosystems over multi-year periods.
This research is applied and field-tested, offering direct evidence to agricultural amendment producers, agronomists, and farmers seeking sustainable soil management techniques. The findings support the commercial blending of biochar and compost formulations, potentially enhanced with nitrogen, to market high-performance soil conditioners designed to improve soil biological function and nutrient turnover.
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This study examines the effect of biochar as an agricultural soil supplement on soil quality indicators, specifically enzyme activity in Missouri regions. While the benefits of biochar on soil bulk density, soil organic carbon, and infiltration have been established, its effect on soil enzyme activity has remained underexplored in this region. A three-year field investigation was conducted with six treatments (compost, biochar, compost + biochar, biochar + compost tea, fescue, and control) to evaluate the effects on enzymes such as β-glucosidase (BG), acid and alkaline phosphatases (ACP-ALP), arylsulfatase (ARS), dehydrogenases (DG), arylamidase (AMD), cellulase (CLS), and urease (URS). Furthermore, soil pH, organic matter (OM), and cation exchange capacity (CEC) were determined. The results showed that compost and biochar treatments considerably increased soil enzyme activity compared to other treatments, with nitrogen application further increasing enzyme activity. Soil pH, OM, and CEC were all important determinants in determining enzyme activity, with BG demonstrating strong positive associations with ACP and AMD (99.5%). This study shows that compost and biochar amendments significantly improve soil physicochemical and biological properties, thereby enhancing soil health and assisting farmers’ sustainable soil management practices.
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DOI: 10.3390/pr12081678
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