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Rice Cultivation under Film Mulching Can Improve Soil Environment and Be Beneficial for Rice Production in China
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This review examines the benefits and drawbacks of growing rice under plastic film mulch in China, which improves water efficiency and yield but contributes to microplastic contamination of agricultural soil. While degradable films and organic fertilizers offer partial solutions, long-term plastic residue in farmland remains a concern. The study highlights the tension between agricultural productivity and the risk of microplastic pollution entering the food supply through soil.
Rice cultivation under film mulching is an integrated management technology that can conserve water, increase soil temperature, improve yield, and enhance water and nitrogen use efficiencies. Despite these advantages, the system does have its drawbacks, such as soil organic matter reduction and microplastic pollution, which impede the widespread adoption of film mulching cultivation in China. Nonetheless, the advent of degradable film, controlled-release fertilizer, organic fertilizer, and film mulching machinery is promoting the development of rice film mulching cultivation. This review outlines the impact of rice cultivation under film mulching on soil moisture, soil temperature, soil fertility, greenhouse gas emissions, weed control, and disease and pest management. It also elucidates the mechanism of changes in rice growth, yield and quality, water use efficiency, and nitrogen use efficiency. This paper incorporates a review of published research articles and discusses some uncertainties and shortcomings associated with rice cultivation under film mulching. Consequently, prospective research directions for the technology of rice film mulching cultivation are outlined, and recommendations for future research into rice cultivation under film mulching are proposed.
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This study evaluated dry direct-seeded rice yield and water use efficiency under biodegradable film mulching compared to conventional polyethylene mulch in a rain-fed agricultural context. Biodegradable films showed comparable agronomic performance to PE films while offering environmental benefits through reduced plastic persistence in soil.
Sustainable Plasticulture in Chinese Agriculture: a Review of Challenges and Routes to Achieving Long-term Food and Ecosecurity
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This review examines the challenges of plasticulture in Chinese agriculture, where macro-, micro-, and nanoplastic pollution from mulch films threatens long-term soil health and crop production. The authors propose holistic solutions targeting plastic production, use, and waste management to protect food security.
Exploring the Occurrence Characteristics of Microplastics in Typical Maize Farmland Soils With Long-Term Plastic Film Mulching in Northern China
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A survey of 225 soil samples from maize farmland with long-term plastic film mulching in northern China found widespread microplastic contamination, with abundance, distribution, and polymer composition reflecting the history of film use and agricultural management practices.
The agricultural plastic paradox: Feeding more, harming more?
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This review examines the trade-off between the agricultural benefits of plastic film mulch, which helps feed an estimated 85 million additional people in China alone, and the growing microplastic contamination it causes in farmland soils. Researchers found that current studies on the effects of mulch-derived microplastics use inconsistent methods and often unrealistically high concentrations, making it difficult to assess the true risks. The study calls for standardized research approaches to better understand whether the agricultural benefits of plastic mulch outweigh its environmental costs.
Distribution and weathering characteristics of microplastics in paddy soils following long-term mulching: A field study in Southwest China
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Researchers investigated microplastic distribution in paddy soils following long-term plastic film mulching in Southwest China, finding that ten years of continuous mulching significantly increased filmy microplastic accumulation and that weathering altered the chemical properties of these particles.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.