Navigation Links
Grazing management effects on stream pollutants
Date:7/21/2011

MADISON, WI, JULY 21, 2011 -- Surface water quality is important for the proper function of aquatic ecosystems, as well as human needs and recreation. Pasturelands have been found to be major sources of sediment, phosphorus and pathogens in Midwest surface water resources. While poor grazing management may lead to contaminated surface water, little is known about the specific amount of pollution in pasture streams that can be attributed to grazing cattle.

Scientists in the Departments of Animal Science, Veterinary Diagnostic and Production Animal Medicine, and Veterinary Microbiology at Iowa State University and the USDA-ARS National Laboratory for Agriculture and the Environment have studied the effects of grazing management practices on sediment, phosphorus, and pathogen deposits into pasture streams. Results of the study are published in the July/August 2011 issue of the Journal of Environmental Quality.

There were no differences in the amounts of sediment, phosphorus or pathogen deposits in the pasture stream between the different types of stream access given to the cattle. Most of the phosphorus and sediment introduced to the stream was the result of stream bank erosion.

The levels of pathogens cattle deposited into pasture streams were infrequent, and found to be dependent on the distribution of grazing cattle. The amount of pollutants in pasture streams were estimated from six 30-acre pastures in central Iowa for two years. The cattle were given different types of access to the pasture streams. Pollutants transported in precipitation runoff was quantified, and fecal samples were collected and analyzed for their levels of harmful bacteria.

Kirk Schwarte, the graduate student who conducted the study, explains, "While cattle can certainly contribute to the pollution of the streams, implementing simple and practical grazing management practices have the potential to greatly reduce these contributions while continuing to allow the cattle to have controlled access to graze on pasture stream banks."

Research on the relationship between grazing cattle and the pollution contributed by the cattle of pasture streams is ongoing at Iowa State University. Further research of grazing management techniques includes the evaluation of specific management practices to maintain water quality in pasture streams.


'/>"/>

Contact: Sara Uttech
suttech@sciencesocieties.org
608-268-4948
American Society of Agronomy
Source:Eurekalert

Related biology news :

1. AgriLife research: Multi-paddock grazing is superior to continuous grazing
2. Grazing as a conservation tool
3. SU biologist partners with National Park Service to study bison grazing in Yellowstone
4. How grazing lands influence greenhouse gas
5. ARS scientists study effects of grazing on grouse habitat
6. Alperujo -- a beneficial complement in diet of dairy sheep during non-grazing periods
7. Grazing animals help spread plant disease
8. A nutty solution to type 2 diabetes management
9. California groundwater management trickles up from local sources
10. Analyzing agroforestry management
11. First joint ESC/EAS guidelines for the management of dyslipidaemias
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/22/2016)... On Monday, the Department of Homeland Security ... solutions for the Biometric Exit Program. The Request for ... (CBP), explains that CBP intends to add biometrics to ... United States , in order to deter visa ... Logo - http://photos.prnewswire.com/prnh/20160622/382209LOGO ...
(Date:6/15/2016)... , June 15, 2016 ... market report titled "Gesture Recognition Market by Application Market - Global ... 2016 - 2024". According to the report, the  global ... billion in 2015 and is estimated to grow ... 48.56 billion by 2024.  Increasing application ...
(Date:6/3/2016)... June 3, 2016 ... Nepal hat ein ... hochsicherer geprägter Kennzeichen, einschließlich Personalisierung, Registrierung und ... der Produktion und Implementierung von Identitätsmanagementlösungen. Zahlreiche ... im Januar teilgenommen, aber Decatur wurde als ...
Breaking Biology News(10 mins):
(Date:6/24/2016)... NY (PRWEB) , ... June 24, 2016 , ... While ... machines such as the Cary 5000 and the 6000i models are higher end machines ... is the height of the spectrophotometer’s light beam from the bottom of the cuvette ...
(Date:6/23/2016)... (PRWEB) , ... June 23, 2016 , ... ... the release of its second eBook, “Clinical Trials Patient Recruitment and Retention Tips.” ... and retention in this eBook by providing practical tips, tools, and strategies for ...
(Date:6/23/2016)... , June 23, 2016   Boston ... of novel compounds designed to target cancer stemness ... has been granted Orphan Drug Designation from the ... treatment of gastric cancer, including gastroesophageal junction (GEJ) ... inhibitor designed to inhibit cancer stemness pathways by ...
(Date:6/23/2016)... Md. , June 23, 2016 A person ... from the crime scene to track the criminal down. ... the U.S. Food and Drug Administration (FDA) uses DNA evidence ... Sound far-fetched? It,s not. The FDA ... sequencing to support investigations of foodborne illnesses. Put as simply ...
Breaking Biology Technology: