Material flow analysis of heavy metals in large-scale cattle farms and ecological risk assessment of cattle manure application to fields
文献类型： 外文期刊
作者： Guo, Bin 1 ; Ren, Pengyu 1 ; Wang, Lu 1 ; Li, Shaohua 1 ; Luo, Chi 1 ; Zhao, Yimo 1 ; Zhao, Hanghang 2 ; Sun, Jian 3 ; Ji, Puhui 1 ;
作者机构： 1.Northwest A&F Univ, Coll Nat Resources & Environm, Yangling 712100, Shaanxi, Peoples R China
2.Shaanxi Univ Technol, Sch Chem & Environm Sci, Hanzhong 723001, Shaanxi, Peoples R China
3.Jilin Acad Agr Sci, Inst Agr Qual Stand & Testing Technol, Changchun, Peoples R China
关键词： Large-scale farms; Forage; Cattle manure; Material flow analysis; Heavy metals; Ecological risks
期刊名称：JOURNAL OF ENVIRONMENTAL MANAGEMENT （ 影响因子：8.0； 五年影响因子：7.9 ）
ISSN： 0301-4797
年卷期： 2024 年 364 卷
页码：
收录情况： SCI
摘要： This study bridges the knowledge gap pertaining to the pathways of heavy metal accumulation and migration within the industrial chain of large-scale cattle farms. Two such farms in Shaanxi serve as a basis for our exploration into Zn, Cu, Cr, Pb, As, and Cd dynamics. Employing material flow analysis complemented by predictive models, we evaluate the potential ecological risks of arable soil from heavy metal influx via manure application. Our findings indicate that Zn and Cu predominate the heavy metal export from these operations, composing up to 60.00%-95.67% of their total content. Predictive models based on 2021 data reveal a potential increase in Cd soil concentration by 0.08 mg/kg by 2035, insinuating a reduced safe usage period for cattle manure at less than 50 years. Conversely, projections from 2022 data point towards a gradual Cu rise in soil, reaching risk threshold levels after 126 years. These outcomes inform limitations in cattle manure utilisation strategies, underscoring Cu and Cd content as key barriers. The study underscores the criticality of continuous heavy metal surveillance within farm by products to ensure environmental protection and sustainable agricultural practices.
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