Navigation Links
Rice agriculture accelerates global warming, new research finds
Date:10/25/2012

More carbon dioxide in the atmosphere, coupled with rising temperatures, is making rice agriculture a larger source of the potent greenhouse gas methane, according to a study published today in Nature Climate Change by a research team that includes a University of California, Davis, plant scientist.

The authors note that relatively simple changes in rice cultivation could help reduce methane emissions.

"Together, higher carbon dioxide concentrations and warmer temperatures predicted for the end of this century will about double the amount of methane emitted per kilo of rice produced," said Chris van Kessel, professor of plant sciences at UC Davis and co-author of the study, published in this week's edition of Nature Climate Change. "Because global demand for rice will increase further with a growing world population, our results suggest that without additional measures, the total methane emissions from rice agriculture will strongly increase."

Rice paddies are one of the largest man-made sources of methane, and rice is the world's second-most produced staple crop.

Van Kessel and his colleagues gathered findings from 63 different experiments on rice paddies, mostly in Asia and North America. They used a technique called meta-analysis, a statistical tool for finding general patterns in a large body of experimental published data.

The experiments measured how rising temperatures and extra carbon dioxide in the atmosphere affect both rice yields and the amount of methane released by rice paddies.

"Our results show that rice agriculture becomes less climate-friendly as our atmosphere continues to change," said Kees Jan van Groenigen, research fellow at Trinity College Dublin, and lead author of the study.

As more carbon dioxide enters the atmosphere, rice plants grow faster, the experimental data showed. This growth, in turn, pumps up the metabolism of methane-producing microscopic organisms that live in the soil beneath rice paddies. The end result: More methane.

Overall, the rice paddy experiments revealed that increased carbon dioxide in the atmosphere boosted rice yields by 24.5 percent and methane emissions by 42.2 percent, increasing the amount of methane emitted per kilo of rice.

Unlike carbon dioxide levels, rising temperatures were found to have only small effects on methane emissions. However, because warming decreases rice yield, it effectively increases methane emissions per kilo of rice.

The authors point out several options available to reduce methane emissions from rice agriculture. For instance, management practices such as mid-season drainage and using alternative fertilizers have been shown to reduce methane emissions from rice paddies. By switching to more heat-tolerant rice cultivars and by adjusting sowing dates, yield declines due to temperature increases can largely be prevented, reducing the effect of warming on methane emissions per yield.


'/>"/>

Contact: Chris van Kessel
cvankessel@ucdavis.edu
University of California - Davis
Source:Eurekalert

Related biology news :

1. Is rainfall a greater threat to Chinas agriculture than warming?
2. U of M researchers Darwinian Agriculture explains how evolution can improve agriculture
3. Clemson scholar receives top agriculture science award
4. Study shows hope of greater global food output, less environmental impact of agriculture
5. Novo Nordisk and BGI establish global collaboration framework
6. EU-funded study underlines importance of Congo Basin for global climate and biodiversity
7. Global warming threat to coral reefs: Can some species adapt?
8. 1 solution to global overfishing found
9. Young researcher taking fight against global killer to the next level in Vietnam
10. Heightened Security Threats and Economic Issues Provide Fillip to Global Civil and Military Biometrics Market, Says Frost & Sullivan
11. Global Information Inc. Announces Discounted Conference Registration For Bio-IT World Asia and Biodetection Technologies 2012
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/22/2016)... 22, 2016 According ... Market for Consumer Industry by Type (Image, Motion, ... (Communication & IT, Entertainment, Home Appliances, & ... to 2022", published by MarketsandMarkets, the market ... reach USD 26.76 Billion by 2022, at ...
(Date:3/18/2016)... --> --> ... & Unmanned Vehicles, Physical infrastructure and Perimeter Surveillance & Detection ... border security market and the continuing migration crisis in the ... has led visiongain to publish this unique report, ... defence & security companies in the border security ...
(Date:3/15/2016)... , March 15, 2016 Yissum ... , the technology-transfer company of the Hebrew University, announced ... of remote sensing technology of various human biological indicators. ... raising $2.0 million from private investors. ... based on the detection of electromagnetic emissions from sweat ...
Breaking Biology News(10 mins):
(Date:4/29/2016)... Elekta is pleased to announce ... industry-leading treatment planning software, is available for clinical release. ... version 5.11 provides significant performance speed enhancements over ... to four times faster than in previous versions of ... standard Monte Carlo algorithm, users ...
(Date:4/28/2016)... ... April 28, 2016 , ... As part ... top industry experts, and expanding its LATAM network and logistics capabilities. Enhancements ... to manage their clinical trial projects. , The expansion will provide unmatched clinical ...
(Date:4/27/2016)... ... 27, 2016 , ... Most consumers engage with biometrics technology ... secure access, voice recognition for hands-free communication, and facial recognition to help organize ... technology today. But if they asked Joey Pritikin, Vice President of Marketing ...
(Date:4/27/2016)... MD (PRWEB) , ... April 27, 2016 , ... ... Greg Lamka, PhD to its Scientific Advisory Board. Dr. Lamka will assist PathSensors ... plant pathogen detection. , PathSensors deploys the CANARY® test platform for the ...
Breaking Biology Technology: