Wu Rui-Ting, Cai Ying-Feng, Chen Ying-Xi, Yang Yi-Wen, Xing Si-Cheng, Liao Xin-Di
College of Animal Science, South China Agriculture University, PR China.
College of Animal Science, South China Agriculture University, PR China; College of Animal Science, South China Agricultural University, Guangzhou, 510642, Guangdong, PR China; Guangdong Provincial Key Lab of Agro-Animal Genomics and Molecular Breeding, And Key Laboratory of Chicken Genetics, Breeding and Reproduction, Ministry Agriculture, Guangzhou, 510642, Guangdong, PR China; National-Local Joint Engineering Research Center for Livestock Breeding, Guangzhou, 510642, Guangdong, PR China.
Environ Pollut. 2021 May 15;277:116790. doi: 10.1016/j.envpol.2021.116790. Epub 2021 Feb 23.
Microplastic (MP) contamination in soil has attracted much attention, and increasing evidence suggests that MPs can accumulate in agricultural soils through fertilization by compost. In addition, the most common raw materials for composting are livestock and poultry manure wastes. Because the presence of MPs may threaten the safe utilization of fertilizers composted by livestock and poultry wastes during crop planting, it is necessary to understand the contamination risk of MPs present in livestock and poultry manure. In this study, the distribution of MPs in 19 livestock and poultry farms with 3 different species was investigated by using FTIR microscopy. A total of 115 items manure MPs and 18 items feed MPs were identified as PP and PE types dominated by colorful fragments and fibers. Furthermore, after comparing the compositions of plastic products used in the feeding process, we proposed two transport pathways for MP pollution in manure and one potential transport pathway in feeds. Our result proved that the application of swine and poultry manure directly could be a new route of MPs in agricultural soil, furthermore, the presence of MPs could threaten the safety of resource utilization in agricultural soil by using swine and poultry manure for manure potentially. Not, only that, our study also provided a reference for the remediation of MP-contaminated soil.
土壤中的微塑料（MP）污染已引起广泛关注，越来越多的证据表明，微塑料可通过堆肥施肥在农业土壤中积累。此外，堆肥最常见的原材料是畜禽粪便废物。由于微塑料的存在可能会威胁到畜禽粪便堆肥肥料在作物种植期间的安全利用，因此有必要了解畜禽粪便中微塑料的污染风险。在本研究中，利用傅里叶变换红外光谱显微镜（FTIR显微镜）研究了19个具有3种不同畜禽种类的养殖场中微塑料的分布情况。共鉴定出115份粪便微塑料和18份饲料微塑料，主要为PP和PE类型，以彩色碎片和纤维为主。此外，在比较了饲养过程中使用的塑料制品成分后，我们提出了粪便中微塑料污染的两种传输途径以及饲料中的一种潜在传输途径。我们的研究结果证明，直接施用猪粪和禽粪可能是微塑料进入农业土壤的一条新途径，此外，微塑料的存在可能会潜在地威胁到利用猪粪和禽粪进行农业土壤资源利用的安全性。不仅如此，我们的研究还为微塑料污染土壤的修复提供了参考。
