School of Science, Wuhan University of Technology, Wuhan, 430070, People's Republic of China.
Wuhan Academy of Agricultural Sciences, Wuhan, 430208, People's Republic of China.
Environ Sci Pollut Res Int. 2021 Mar;28(9):10564-10575. doi: 10.1007/s11356-020-11246-5. Epub 2020 Oct 24.
The livestock manure nitrogen load on farmland (LMNLF) is often used to assess the potential environmental pollution risk of livestock manure nitrogen nutrient (LMN) in a target region. First, the LMNLF of Wuhan city is calculated, and the potential environmental pollution risk of LMN is mainly concentrated in Jiangxia District, Xinzhou District, and Huangpi District, but does not exceed the European Union (EU) standards. Heat map results also certificate this conclusion. Therefore, these three districts are the research emphases. Second, considering spatial distribution of farms, an improved LMNLF method is proposed combining the previous LMNLF and density-based spatial clustering of applications with noise (DBSCAN) methods. Several regions with pollution risks including seven regions in Jiangxia District, one in Xinzhou District, and one in Huangpi District are found out using the improved LMNLF method. Third, to evaluate the carrying capacity of the intensive breeding areas more reasonably, 2 km is taken as the farthest transportation distance of manure; there is still one region in Huangpi District which has serious pollution risk on the environment. These above results can help evaluate the pollution degree of livestock manure to the surrounding environment more precisely.
农田畜禽粪便氮负荷（LMNLF）常用于评估目标区域农田畜禽粪便氮养分（LMN）的潜在环境污染风险。首先，计算了武汉市的 LMNLF，结果表明，LMN 的潜在环境污染风险主要集中在江夏区、新洲区和黄陂区，但未超过欧盟（EU）标准。热图结果也证明了这一结论。因此，这三个区是研究重点。其次，考虑到农场的空间分布，提出了一种改进的 LMNLF 方法，将先前的 LMNLF 与基于密度的空间聚类应用和噪声（DBSCAN）方法相结合。使用改进的 LMNLF 方法发现了七个位于江夏区、一个位于新洲区和一个位于黄陂区的具有污染风险的区域。第三，为了更合理地评估集约化养殖区的承载能力，将 2 公里作为粪便的最远运输距离；黄陂区仍有一个区域对环境存在严重的污染风险。这些结果有助于更准确地评估畜禽粪便对周围环境的污染程度。
