Muñoz Yustres Jorge Leonardo, Zapata-Restrepo Lina María, Garcia-Chaves Maria Carolina, Gomez-Mendez Luis David
Faculty of Engineering, University of Antioquia, Medellín, Colombia, 050010.
Institute of Biology, Faculty of Exact and Natural Sciences, University of Antioquia, Medellín, 050010, Colombia.
Chemosphere. 2025 Jun;378:144423. doi: 10.1016/j.chemosphere.2025.144423. Epub 2025 Apr 18.
The presence of microplastics (MPs) in agricultural soils is a growing concern, especially in rice cultivation systems, where information is limited, particularly in Latin America. Given the economic importance of this crop in Colombia and the generation of plastic waste from some associated practices, it is crucial to determine the presence of MPs related to agricultural activities in soils dedicated to this activity. This study evaluated the presence of MPs in soils and irrigation water of rice crops in Chicoral, Tolima, Colombia, during two contrasting seasons. Soil samples from seven plots (upper, middle, and lower zones) and water samples from seven points along the irrigation canal were collected. MPs were found in all samples, with similar concentrations in water samples collected in the rainy and dry seasons (0.11 ± 0.10 vs. 0.10 ± 0.06 items/m, respectively), and higher abundance in soil samples during the rainy season (4 ± 2.71 vs 3.62 ± 1.92 items/50 g). Fragments and fibers were the most abundant forms of plastics (53 % water, 55 % soil), predominantly larger than 100 μm and blue in color. Polypropylene (PP) was the most abundant polymer (50 %) in the meso- and macroplastic samples. Our results suggested that MPs contamination in rice crop soils at Chicoral is influenced by irrigation water transport and improper plastic waste management, highlighting the need for further research on their effects on agricultural systems.
农业土壤中微塑料（MPs）的存在日益受到关注，尤其是在水稻种植系统中，而这方面的信息有限，在拉丁美洲尤为如此。鉴于这种作物在哥伦比亚的经济重要性以及一些相关活动产生的塑料废物，确定与该活动相关的农业活动土壤中微塑料的存在至关重要。本研究评估了哥伦比亚托利马省奇科拉尔地区两个对比季节水稻作物土壤和灌溉水中微塑料的存在情况。采集了七个地块（上部、中部和下部区域）的土壤样本以及灌溉渠沿线七个点的水样。所有样本中均发现了微塑料，雨季和旱季采集的水样中微塑料浓度相似（分别为0.11±0.10和0.10±0.06个/米），而雨季土壤样本中的微塑料丰度更高（4±2.71和3.62±1.92个/50克）。碎片和纤维是最常见的塑料形式（水样中占53%，土壤中占55%），主要大于100微米且为蓝色。聚丙烯（PP）是中塑料和大塑料样本中最丰富的聚合物（占50%）。我们的结果表明，奇科拉尔地区水稻作物土壤中的微塑料污染受灌溉水运输和不当塑料废物管理的影响，突出了对其对农业系统影响进行进一步研究的必要性。
