Featured Research

from universities, journals, and other organizations

The lifetime journeys of manure-based microbes

Date:
February 22, 2013
Source:
USDA/Agricultural Research Service
Summary:
Studies at the U.S. Department of Agriculture are shedding some light on the microbes that dwell in cattle manure -- what they are, where they thrive, where they struggle, and where they can end up.

ARS scientists are studying the fate of cow manure in feedlots and in fields with an eye to increased food and environmental safety.
Credit: Peggy Greb

Studies at the U.S. Department of Agriculture (USDA) are shedding some light on the microbes that dwell in cattle manure -- what they are, where they thrive, where they struggle, and where they can end up.

This research, which is being conducted by Agricultural Research Service (ARS) scientists at the agency's Agroecosystems Management Research Unit in Lincoln, Neb., supports the USDA priority of ensuring food safety. ARS is USDA's chief intramural scientific research agency.

In one project, ARS microbiologist Lisa Durso used fecal samples from six beef cattle to identify a core set of bovine gastrointestinal bacterial groups common to both beef and dairy cattle. She also observed a number of bacteria in the beef cattle that had not been reported in dairy cows, and identified a diverse assortment of bacteria from the six individual animals, even though all six consumed the same diet and were the same breed, gender and age.

In another study, Durso collaborated with ARS agricultural engineer John Gilley and others to study how livestock diet affected the transport of pathogens in field runoff from manure-amended soils. The scientists added two types of manure to experimental conventional-till and no-till fields at 1-, 2-, or 4-year application rates. The manure had been collected from livestock that had consumed either corn or feed with wet distillers grains.

After a series of simulated rain events, the team collected and analyzed samples of field runoff and determined that neither diet nor tillage management significantly affected the transport of fecal indicator bacteria. But they did note that diet affected the transport of bacteriophages -- viruses that invade bacteria -- in field runoff.

Gilley also conducted an investigation into how standing wheat residues affected water quality in runoff from fields amended with 1-, 2-, or 4-year application rates of manure. The scientists found that runoff loads of dissolved phosphorus, total phosphorus, nitrates, nitrogen, and total nitrogen were much higher from plots with residue cover. The team also observed that runoff from fields amended with 4-year application rates of manure had significantly higher levels of total phosphorus and dissolved phosphorus than fields amended with 1-year or 2-year manure rates.

Results from these studies have been published in Foodborne Pathogens and Disease, Applied and Environmental Microbiology, and Transactions of the ASABE.

Read more about this research in the February 2013 issue of Agricultural Research magazine: http://www.ars.usda.gov/is/AR/archive/feb13/cows0213.htm


Story Source:

The above story is based on materials provided by USDA/Agricultural Research Service. The original article was written by Ann Perry. Note: Materials may be edited for content and length.


Cite This Page:

USDA/Agricultural Research Service. "The lifetime journeys of manure-based microbes." ScienceDaily. ScienceDaily, 22 February 2013. <www.sciencedaily.com/releases/2013/02/130222143227.htm>.
USDA/Agricultural Research Service. (2013, February 22). The lifetime journeys of manure-based microbes. ScienceDaily. Retrieved August 22, 2014 from www.sciencedaily.com/releases/2013/02/130222143227.htm
USDA/Agricultural Research Service. "The lifetime journeys of manure-based microbes." ScienceDaily. www.sciencedaily.com/releases/2013/02/130222143227.htm (accessed August 22, 2014).

Share This




More Plants & Animals News

Friday, August 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Endangered Red Wolves Face Uncertain Future

Endangered Red Wolves Face Uncertain Future

AP (Aug. 22, 2014) A federal judge temporarily banned coyote hunting to save endangered red wolves, but local hunters say that the wolf preservation program does more harm than good. Meanwhile federal officials are reviewing its wolf program in North Carolina. (Aug. 22) Video provided by AP
Powered by NewsLook.com
Farm Resurgence Grows With Younger Crowd

Farm Resurgence Grows With Younger Crowd

AP (Aug. 22, 2014) New England farms are seeing a surge in younger farm hands as the 'buy local' food movement grows across the country. (Aug. 22) Video provided by AP
Powered by NewsLook.com
Drug Used To Treat 'Ebola's Cousin' Shows Promise

Drug Used To Treat 'Ebola's Cousin' Shows Promise

Newsy (Aug. 21, 2014) An experimental drug used to treat Marburg virus in rhesus monkeys could give new insight into a similar treatment for Ebola. Video provided by Newsy
Powered by NewsLook.com
Terrifying City-Dwelling Spiders Are Bigger And More Fertile

Terrifying City-Dwelling Spiders Are Bigger And More Fertile

Newsy (Aug. 21, 2014) According to a new study, spiders that live in cities are bigger, fatter and multiply faster. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins