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Biodegradable microplastics boost dissimilatory nitrate reduction to ammonium (DNRA) process contributing to ammonium nitrogen retention in farmland soils
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The Effect of N Mineralization, Nitrification and Ammonification Rates in Soils Contaminated with Microplastics
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A one-month soil experiment comparing polyethylene, PVC, and biodegradable polylactic acid microplastics found that smaller particles and PLA had the greatest disruptive effects on bacterial diversity, nitrogen cycling, and enzyme activity, inhibiting nitrification while enhancing denitrification. The finding that biodegradable plastics can be equally or more disruptive to soil microbiomes than conventional plastics complicates assumptions that they represent a safe environmental alternative.
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