减少从奶牛场道路径流中磷、沉积物和大肠杆菌的损失

IF 0.9 4区农林科学 Q3 AGRICULTURE, MULTIDISCIPLINARY

Irish Journal of Agricultural and Food Research Pub Date : 2020-11-30 DOI:10.15212/ijafr-2020-0117

R. McDowell, K. Daly, O. Fenton

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引用次数: 3

摘要

农场道路上的奶牛沉积物是进入溪流的污染物的潜在来源。测量了奶牛场道路的两半在12个月内发生的18次径流事件中的磷（P）、悬浮沉积物（SS）和大肠杆菌（E.coli）负荷，这些径流事件流入了受磷影响的相邻溪流。其中一半的径流未经处理，而另一半则直接通过喷有1%ACH溶液的钢熔化渣[称为氯化铝（ACH）改性渣]过滤器，以提高磷的吸附能力。考虑到沉积物重量、数量和磷含量的变化，进行了不确定性分析，以确定道路上磷损失的潜在负荷。在监测期间，与对照相比，ACH改性渣路的总负荷降低了P（92%）、SS（98%）和大肠杆菌（76%）。然而，不确定性分析表明，沉积在道路上的粪肥量可能会增加10倍。

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Mitigation of phosphorus, sediment and Escherichia coli losses in runoff from a dairy farm roadway

Dairy cow deposits on farm roadways are a potential source of contaminants entering streams. Phosphorus (P), suspended sediment (SS) and Escherichia coli (E. coli) loads in 18 runoff events over 12 mo from two-halves of a section of dairy farm roadway that spilt into an adjacent P-impacted stream were measured. The runoff from one half was untreated while the other half was directed through a filter of steel melter slag [termed aluminium chlorohydrate (ACH)-altered slag] sprayed with 1% ACH solution to improve P sorption capacity. An uncertainty analysis was conducted to ascertain potential loads of P lost from roadways considering variation in deposit weight, number and P content. Over the monitoring period, the total load decreased P (92%), SS (98%) and E. coli (76%) from the ACH-altered slag roadway compared to the control. However, uncertainty analysis showed that the amount of dung-P deposited on the roadway could be 10-fold greater.

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来源期刊

Irish Journal of Agricultural and Food Research 农林科学-农业综合

CiteScore

2.50

自引率

20.00%

发文量

审稿时长

>36 weeks

期刊介绍： The Irish Journal of Agricultural and Food Research is a peer reviewed open access scientific journal published by Teagasc (Agriculture and Food Development Authority, Ireland). Manuscripts on any aspect of research of direct relevance to Irish agriculture and food production, including plant and animal sciences, food science, agri environmental science, soils, engineering, buildings, economics and sociology, will be considered for publication. The work must demonstrate novelty and relevance to the field of research. Papers published or offered for publication elsewhere will not be considered, but the publication of an abstract does not preclude the publication of the full paper in this journal.