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Rice Cultivation under Film Mulching Can Improve Soil Environment and Be Beneficial for Rice Production in China
Summary
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.