Featured Research

from universities, journals, and other organizations

Estrogen concentrations in manure runoff: Pelletized manure reduces toxic runoff

Date:
November 18, 2010
Source:
American Society of Agronomy
Summary:
Higher concentrations of hormones in waterways have been found to cause physiological and sexual impairment in fish. A new study examines estrogen concentrations in runoff from agricultural plots fertilized with chicken manure.

There is considerable amount of uncertainty concerning the environmental impacts that animal hormones have on surface water. Higher concentrations of hormones in waterways have been found to cause physiological and sexual impairment in fish and other aquatic species. However, a study from the University of Delaware that examined estrogen concentrations runoff from agricultural fields fertilized with chicken manure found that it is as much about the application of the manure as it is about the measurement of the types of estrogen.

The study was conducted on the experimental plots on the Coastal Plain agricultural soils in Middletown, DE. It measured and compared the amounts of both toxic, free forms of estrogen hormones and less toxic species found in runoff. Corn was planted as a cover crop and chicken manure was applied in either a pelletized form or a raw litter form. Reduced tillage and no tillage treatments were also employed. Samples of surface runoff were collected after 10 rain storms during the 2008 summer growing season from April through July.

Sudarshan Dutta, the author of the study, found that the amounts of estrogen were lower in plots fertilized with pelletized manure and plots that received no-tillage treatments.

Additionally, Dutta discovered the entire range of estrogen concentrations in the samples was significantly lower than those observed in other previous agricultural studies. Nevertheless, concentrations of the less toxic conjugate forms of estrogen were higher than the toxic, free forms.

According to Dutta, prior studies did not usually measure the conjugate forms of estrogen, saying it is necessary to measure these forms.

"The higher concentration of conjugate forms of estrogens underscores the need for reporting all forms of the hormones. This is especially critical considering that conjugate species can be converted to the toxic free forms under certain environmental conditions," he says.

The study was partly funded through a grant by the United States Department of Agriculture and the results are published in the September-October 2010 issue of the Journal of Environmental Quality.



Story Source:

The above story is based on materials provided by American Society of Agronomy. Note: Materials may be edited for content and length.


Journal Reference:

  1. Sudarshan Dutta, Shreeram Inamdar, Jerry Tso, Diana S. Aga, J. Tom Sims. Free and Conjugated Estrogen Exports in Surface-Runoff from Poultry Litter–Amended Soil. Journal of Environment Quality, 2010; 39 (5): 1688 DOI: 10.2134/jeq2009.0339

Cite This Page:

American Society of Agronomy. "Estrogen concentrations in manure runoff: Pelletized manure reduces toxic runoff." ScienceDaily. ScienceDaily, 18 November 2010. <www.sciencedaily.com/releases/2010/11/101117161248.htm>.
American Society of Agronomy. (2010, November 18). Estrogen concentrations in manure runoff: Pelletized manure reduces toxic runoff. ScienceDaily. Retrieved July 30, 2014 from www.sciencedaily.com/releases/2010/11/101117161248.htm
American Society of Agronomy. "Estrogen concentrations in manure runoff: Pelletized manure reduces toxic runoff." ScienceDaily. www.sciencedaily.com/releases/2010/11/101117161248.htm (accessed July 30, 2014).

Share This




More Plants & Animals News

Wednesday, July 30, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Raw: Thousands Flocking to German Crop Circle

Raw: Thousands Flocking to German Crop Circle

AP (July 30, 2014) Thousands of people are trekking to a Bavarian farmer's field to check out a mysterious set of crop circles. (July 30) Video provided by AP
Powered by NewsLook.com
Concern Grows Over Worsening Ebola Crisis

Concern Grows Over Worsening Ebola Crisis

AFP (July 30, 2014) Pan-African airline ASKY has suspended all flights to and from the capitals of Liberia and Sierra Leone amid the worsening Ebola health crisis, which has so far caused 672 deaths in Guinea, Liberia and Sierra Leone. Duration: 00:43 Video provided by AFP
Powered by NewsLook.com
At Least 20 Chikungunya Cases in New Jersey

At Least 20 Chikungunya Cases in New Jersey

AP (July 30, 2014) At least 20 New Jersey residents have tested positive for chikungunya, a mosquito-borne virus that has spread through the Caribbean. (July 30) Video provided by AP
Powered by NewsLook.com
Raw: Otters Enjoy Water Slides at Japan Zoo

Raw: Otters Enjoy Water Slides at Japan Zoo

AP (July 30, 2014) River otters were hitting the water slides to beat the summer heatwave on Wednesday at Ichikawa City's Zoological and Botanical Garden. (July 30) Video provided by AP
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