Impacts of African swine fever on water quality in China
Impacts of African swine fever on water quality in China
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DOI：
10.1088/1748-9326/abe2ce
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发表时间：
2021-02
影响因子：
6.7
通讯作者：
Z. Bai;X. Jin;O. Oenema;Michael R. F. Lee;Jun Zhao;Lin Ma
中科院分区：
文献类型：
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作者：
Z. Bai;X. Jin;O. Oenema;Michael R. F. Lee;Jun Zhao;Lin Ma
非洲猪瘟（ASF）在中国的爆发大大降低了该国的生猪生产能力，同时也对更广泛的食品系统中的畜产品供应产生了深远的影响。先前的研究已经量化了对粮食价格的潜在长期影响，但是，关于对粮食系统变化（畜产品供应和消费模式）和与疫情相关的水质保护的直接短期影响的信息很少。在这里，我们使用了与消费模式和水质相关的多个数据来源来填补这一知识空白。我们的研究结果表明，非洲猪瘟的爆发已经改变了中国短期的畜产品消费模式，对进口畜产品的依赖越来越大。猪肉自给率的快速变化，也带动了不少城市居民消费价格指数的快速上涨。在水道密集地区禁止泔水喂养和颠倒环境法规会产生意想不到的后果，特别是对水质。不再供应的泔水被倾倒在废水流中，降低了污水处理效率。在水道密集地区重新建立养猪业，导致农业用地的当地粪便养分负荷能力下降。我们建议：（a）一个短期的中间政策，以禁止排放的污水系统，恢复其以前的效率，（B）的安全回收利用的新技术的发展，和（c）设计一个长期的智能空间规划的生猪生产，屠宰和运输在中国，以确保持续保护水质脆弱区。
The outbreak of African swine fever (ASF) in China has significantly reduced the country’s pig production capability, whilst also having far-reaching impacts on livestock products supply in the wider food system. Previous studies have quantified the potential long-terms impacts on food prices, however, little information is available regarding the direct short-term impacts on food system changes (livestock products supply and consumption patterns) and water quality protection associated with the outbreak. Here, we used multiple sources of data in relation to consumption patterns and water quality to fill this knowledge gap. Our results indicate that the ASF outbreak has changed the short-term livestock products consumption pattern in China, with increasing reliance on importation of livestock products. A rapid change in pork self-sufficiency rate has also driven a rapid increase in the consumer price index of many cities. Banned swill feeding and reversed environmental regulations in the watercourse intense regions has unintended consequences, especially on water quality. Swill, which is no longer fed, was dumped into water waste streams and lowered the sewage treatment efficiency. The re-establishment of pig production back into watercourse intense regions has led to exceedance of local manure nutrient loading capacity of agricultural land. We suggest (a) a short-term intermediate policy to prohibit discharge of swill to sewage systems, to return their previous efficiency, (b) the development of new technologies for the safe recycling of swills, and (c) the design of a long-term intelligent spatial planning of pig production, slaughter and transportation within China to ensure continued protection of water quality vulnerable zones.