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The Impact of Biodegradable Mulch Film on Soil
2025-04-28 15:54
Improving Soil Structure: Biodegradable mulch films enhance soil temperature and help retain moisture during use, thereby improving the physical properties of the soil. Studies show that after applying biodegradable mulch films, soil temperatures increased by approximately 0.7% on average compared to bare soil—matching the effectiveness of conventional PE mulch films.
1. Additionally, the water-retention performance of biodegradable mulch film is initially comparable to that of conventional PE film, but it gradually diminishes as the biodegradable film breaks down over time.
Reducing White Pollution: Traditional agricultural mulch films are difficult to recycle and biodegrade, leaving behind significant amounts of residual film in the soil. This not only damages soil structure but also negatively impacts the quality of farmland. In contrast, biodegradable mulch films can be completely broken down within 120 days through the combined action of soil microorganisms, along with photothermal oxidation, ultimately decomposing into harmless byproducts—carbon dioxide and water. Since no recycling is required, this approach significantly cuts down on soil contamination.
Promoting crop growth: The degradation products of biodegradable mulch films can provide organic carbon sources for crops, supporting their development. Studies show that bio-degradable mulch films outperform conventional ones in enhancing soil nutrient conditions, particularly by boosting the soil’s total nitrogen content.
1. Additionally, using biodegradable mulch film can also improve corn emergence rates and yield.
Environmental Features: The main components of biodegradable mulch films include bio-degradable polymer materials such as polylactic acid (PLA) and polybutylene adipate terephthalate (PBAT). These materials can fully degrade in agricultural environments, ultimately breaking down into harmless substances like water, carbon dioxide, and other small-molecule compounds.
1. This not only reduces environmental pollution but also helps achieve the goals of low carbon and eco-friendliness.
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