Featured Research

from universities, journals, and other organizations

Managing Carbon Loss

Date:
December 8, 2008
Source:
American Society of Agronomy
Summary:
The push for alternative energy has created a large demand for corn stover, a popular feedstock used to produce cellulosic ethanol, but utilizing these materials, rather than using it as compost, means a loss of soil organic carbon. Researchers have studied the effectiveness of alternative carbon augmentation practices and have reported positive results.

As the United States continues to develop alternative energy methods and push towards energy independence, cellulosic-based ethanol has emerged as one of the most commercially viable technologies. Corn stover remains the most popular source available, but the loss of soil organic carbon (SOC) associated with the removal of corn fodder as a cellulosic ethanol feedstock is of agricultural and environmental concern.

In the November-December 2008 issue of Agronomy Journal, scientists from Michigan State University report on the effectiveness of carbon augmentation practices, including the integration of cover crops, manure, and compost, to supplant carbon loss in corn stover removed cropping systems. The results indicate that corn stover based bioenergy cropping systems can be managed to increase short-term carbon sequestration rates and reduce overall net global warming potential by using no-till planting methods and a manure-based nutrient management system.

The research team measured soil carbon changes as well as nitrous oxide and methane gas emissions from corn stover-ethanol field plots managed under various carbon augmentation practices. In addition to the gas emissions measured in the field, other carbon emissions assessed included estimates for the manufacturing carbon cost of crop inputs; methane emissions from the livestock manure source; methane and nitrous oxides generated during manure storage and application; and the fuel used in crop production and in gathering and land applying the manure.

“These results show that bioenergy cropping systems, particularly those integrating livestock manure into their management scheme, are a win-win option on both alternative energy and environmental fronts,” says Kurt Thelen, member of the research team.

Thelen says this research demonstrates that under proper management, livestock manure can supplant carbon lost from corn stover removal, and actually provide an environmental benefit, both in terms of greenhouse gas (GHG) mitigation, and from the established improved soil properties associated with increasing SOC levels such as increased water retention.

“For every gallon of gasoline burned, the equivalent of 19 lbs of CO2 is released to the atmosphere which contributes to the environmental GHG problem,” says Thelen. “Conversely, this work shows that in the not too distant future, choosing a cellulosic ethanol alternative at the pump may actually result in a net removal of CO2 from the atmosphere.”

Research is ongoing at Michigan State University to evaluate the environmental, agronomic, and economic sustainability of bioenergy cropping systems. Support for this work was provided by USDA-CSREES, the CASMGS program, and the Michigan Agricultural Experiment Station.


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. Fronning, Bradley E., Thelen, Kurt D., Min, Doo-Hong. Use of Manure, Compost, and Cover Crops to Supplant Crop Residue Carbon in Corn Stover Removed Cropping Systems. Agronomy Journal, 2008; 100 (6): 1703 DOI: 10.2134/agronj2008.0052

Cite This Page:

American Society of Agronomy. "Managing Carbon Loss." ScienceDaily. ScienceDaily, 8 December 2008. <www.sciencedaily.com/releases/2008/12/081203184535.htm>.
American Society of Agronomy. (2008, December 8). Managing Carbon Loss. ScienceDaily. Retrieved September 19, 2014 from www.sciencedaily.com/releases/2008/12/081203184535.htm
American Society of Agronomy. "Managing Carbon Loss." ScienceDaily. www.sciencedaily.com/releases/2008/12/081203184535.htm (accessed September 19, 2014).

Share This



More Earth & Climate News

Friday, September 19, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Raw: Wildfires in CA Burn Forest Asunder

Raw: Wildfires in CA Burn Forest Asunder

AP (Sep. 18, 2014) An out-of-control Northern California wildfire has nearly 2,800 people from their homes as it continues to grow, authorities said Thursday. Authorities said a man has been arrested on suspicion of arson for starting the fire on Saturday. (Sept. 18) Video provided by AP
Powered by NewsLook.com
Raw: Elephant Undergoes Surgery in Tbilisi Zoo

Raw: Elephant Undergoes Surgery in Tbilisi Zoo

AP (Sep. 18, 2014) Grand the elephant has successfully undergone surgery to remove a portion of infected tusk at Tbilisi Zoo in Georgia. British veterinary surgeons used an electric drill to extract the infected piece. (Sept. 18) Video provided by AP
Powered by NewsLook.com
Raw: Scientists Examine Colossal Squid

Raw: Scientists Examine Colossal Squid

AP (Sep. 16, 2014) Squid experts in New Zealand thawed and examined an unusual catch on Tuesday: a colossal squid. It was captured in Antarctica's remote Ross Sea in December last year and has been frozen for eight months. (Sept. 16) Video provided by AP
Powered by NewsLook.com
Man Floats for 31 Hours in Gulf Waters

Man Floats for 31 Hours in Gulf Waters

AP (Sep. 16, 2014) A Texas man is lucky to be alive after he and three others floated for more than a day in the Gulf of Mexico when their boat sank during a fishing trip. (Sept. 16) 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