Navigation Links
Nitrogen mysteries in urban grasslands
Date:10/13/2009

.

Differences in NO3- leaching and N2O flux between forests and grasslands were not as high as expected given the higher frequency of disturbance and fertilization in the grasslands. Annual NO3- leaching was usually higher in grass than forest plots, but in a very dry year and when a disturbed forest plot was included in the analysis, differences were small and insignificant. There were few differences in N2O between grass and forest plots, and markedly higher fluxes in wet years. In a dry year, N losses from the grasslands were equal to less than 10% of the amount of N applied in fertilizer, and even in a wet year, losses were less than 40%. Lots of N appears to be retained in urban grasslands, likely because they support rapidly growing vegetation and high stocks of soil organic matter.

While surprising, these results do not suggest that we should not be concerned about the environmental impacts of urban grasslands. If leaching losses equal 40% of the amount of N applied in fertilizer, and high rates of fertilizer (e.g., 200 kg N ha-1 yr-1) are applied, lawns will have a strongly negative effect on receiving water quality. However, our results suggest that urban grasslands have considerable capacity for N retention that should be studied and considered in evaluations of land-use change and in the development of management plans for urban and suburban watersheds.

The full article is available for no charge for 30 days following the date of this summary. View the abstract at http://jeq.scijournals.org/cgi/content/abstract/38/5/1848.

The Journal of Environmental Quality, http://jeq.scijournals.org is a peer-reviewed, international journal of environmental quality in natural and agricultural ecosystems published six times a year by the American Society of Agronomy (ASA), Crop Science Society of America (CSSA), and
'/>"/>

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

Page: 1 2 3

Related biology news :

1. Planets nitrogen cycle overturned by tiny ammonia eater of the seas
2. Is nitrogen the new carbon?
3. Nitrogen fixation and phytoplankton blooms in the southwest Indian Ocean
4. Ozone, nitrogen change the way rising CO2 affects Earths water
5. Nitrogen research shows how some plants invade, take over others
6. UC Davis begins $2.8 million in studies of agricultural nitrogens impacts
7. Illinois Soil Nitrogen Test measures microbial nitrogen
8. Tree species composition influences nitrogen loss from forests
9. Researchers call for nitrogen and phosphorus reductions to combat eutrophication in aquatic systems
10. Cropland diversity reduces nitrogen pollution
11. Lichens function as indicators of nitrogen pollution in forests
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/31/2014)... Dr. John Schoggins , Assistant Professor of Microbiology ... New Innovator Award from the National Institutes of Health ... can harbor numerous viruses without becoming sick. , ... is one of 85 awards given under the High ... The New Innovator Awards were created to support highly ...
(Date:10/31/2014)... Thomas Bugnyar and his team have been studying ... the Northern Austrian Alps for years. They observed ... such as grooming and playing. However, they also ... by a third individual. Although in about 50 ... and broke up the two affiliating ravens, intervening ...
(Date:10/30/2014)... available in German . ... our fellow humans to behave socially? This is one ... game theory. Previous studies assumed that it is almost ... from the Max Planck Institute for Evolutionary Biology have ... influence on the cooperative behaviour of others. However, the ...
Breaking Biology News(10 mins):UT Southwestern Microbiologist awarded prestigious NIH research grant 2Together we are strong -- or insufferable 2Together we are strong -- or insufferable 3Together we are strong -- or insufferable 4
... as men, but estrogen might not be the reason. Testosterone, ... findings in the lab of Florida State University researcher Mohamed ... was awarded a five-year, $1.8 million grant from the National ... anxiety. His research team also is working to identify the ...
... industry with an annual turnover of more than SEK 500 ... the malaria medication sold there could be ineffective or even ... a technique that could resolve the situation. In ... It will resemble a small briefcase, in which a pharmacist, ...
... Lizards are an important indicator species for understanding the ... crucial index for evaluating species health, but lizards are ... problem of spontaneous tail loss when lizards are in ... of evaluating these lizards. Dr. Shai Meiri of Tel ...
Cached Biology News:Why does anxiety target women more? FSU researcher awarded $1.8 million grant to find out 2Problem of fake medicines in developing countries could be solved 2Getting a tail up on conservation? 2
(Date:10/31/2014)... (PRWEB) October 31, 2014 Having access ... is an uphill battle in many corners of the ... rural farming community in northwestern Bolivia where many have ... a group from Fairfield University’s School of Engineering has ... Unidad Academica Campesina (UAC), “the united college for the ...
(Date:10/31/2014)... (PRWEB) October 30, 2014 Two ... America were hosted by Charm Sciences at its ... their week in the US, the participants discussed ... control, hygiene management, and process verification, and received ... , This was the first visit to the ...
(Date:10/31/2014)... Dallas, Texas (PRWEB) October 31, 2014 ... report on Global and China Biocides industry. The ... classification, application, and industry chain structure as well ... market analysis, including China’s domestic market as well ... economic situation analysis. The report on the Chinese ...
(Date:10/31/2014)... ENVIRON , an international environmental, ... Dr. Harvey Clewell III has rejoined the firm ... with senior professionals in ENVIRON’s Health Sciences practice. ... The Hamner Institutes for Health Sciences (The Hamner) ... is Director, Center for Human Health Assessment. , ...
Breaking Biology Technology:Fairfield University School of Engineering project reduces illness in rural community 2Fairfield University School of Engineering project reduces illness in rural community 3Charm Sciences Hosts Executives from Latin America for Dairy Safety Executive Seminar 2Biocides Market for International & Chinese Regional Development Analysis Now Available at DeepResearchReports.com 2Biocides Market for International & Chinese Regional Development Analysis Now Available at DeepResearchReports.com 3Internationally recognized health scientist Dr. Harvey Clewell renews association with ENVIRON 2Internationally recognized health scientist Dr. Harvey Clewell renews association with ENVIRON 3
... University a six-year, $16.2 million grant for support of ... of the oldest interdisciplinary research centers in the nation. ... a scientific research program, is one of six Materials ... successfully renew support from the NSF this fiscal year. ...
... Laureate Biopharmaceutical Services, Inc. announced today that their ... Food and Drug Administration (FDA) to submit electronic common ... 4 gigabyte test submission comprising CMC, preclinical and clinical ... in record time. The endorsement complements Laureate,s recent approval ...
... HUYA Bioscience International, a leader in ... partnership with the Zhejiang Chinese Medical University Life ... global drug development of China,s novel Traditional Chinese ... to bring productive synergy between the two parties. ...
Cached Biology Technology:Collaborative science and engineering 2FDA Approves Electronic Common Technical Document (eCTD) for Laureate's Regulatory Submissions 2FDA Approves Electronic Common Technical Document (eCTD) for Laureate's Regulatory Submissions 3HUYA Bioscience International Forms Alliance With Zhejiang Chinese Medical University Life Science College 2HUYA Bioscience International Forms Alliance With Zhejiang Chinese Medical University Life Science College 3
Mouse monoclonal [4i97] to HLA Class 1 A25 ( Abpromise for all tested applications). Antigen: Full length protein (Human): HLA Class 1 Antigen-A25. Swiss Protein ID: P18462...
Request Info...
Mouse Anti-Human MCAF-(MCP-1)...
Gastric Carcinoma Marker [BY-1 (3H11)]...
Biology Products: