August 2, 2016   •   News

The Paddy Rice Research Group’s Sub-America’s division met on 13-15 July this year in Stuttgart, Arkansas, USA. The meeting was attended by 10 GRA Member countries: Argentina, Brazil, Canada, Chile, Colombia, Indonesia, Japan, New Zealand, Uruguay and USA, and a meeting report will soon be available. The presentations for the meeting are now available in the Members’ Area of the website.

Field trip PRRG 2016

PRRG 2016 Meeting participants on a field trip

July 4, 2016   •   Events

13/07/2016 - 15/07/2016

Stuttgart - Arkansas, USA


April 6, 2016   •   Events

13/07/2016 - 15/07/2016

Stuttgart, Arkansas, USA

April 1, 2016   •   News

Three Research Groups of the GRA, Croplands, Livestock and Paddy Rice, have each produced an easy-to-read overview of their group activities and structure.

Each of the brochures cover the six areas of work that the GRA focuses on: understanding the current research landscape, building capability, good practice guidance and methodologies, research networks and databases, collaborative research, and policy support & links to international initiatives.

2016 RG brochures

More information on each of the Research Groups can be found on the GRA website.

March 29, 2016   •   News

The National Institute for Agro-Environmental Sciences (NIAES) has announced the media release of the new publication, “Guidelines for Measuring Methane (CH4) and Nitrous Oxide (N2O) Emissions from Rice Paddies by a Manually Operated Closed Chamber Method”.

The guidelines are supported by the MIRSA-2 project “Technology development for circulatory food production systems responsive to climate change (Development of mitigation option for greenhouse gas emissions from agricultural lands in Asia)”, and funded by MAFF, Japan, to support the goals and objectives of the Paddy Rice Research Group of the Global Research Alliance.mirsa_guidelines_1


View Guidelines

August 13, 2015   •   Events

18/09/2015 - 18/09/2015

Nanjing, China

October 28, 2014   •   News

The GRA Rice Research Group in collaboration with IRRI, CIAT and the CCAC are lanching a project to reduce methane emissions intensities by 30% in eligible systems by 2019, while increasing food security and adaptation capacities of farmers.

The project will produce technical and policy guidance for implementing scalable mitigation options in paddy rice in Southeast Asia, South Asia, and Latin America. For more information see here.


December 19, 2013   •   News

Summary Reports from the fifth meetings of the Croplands Research Group and the Paddy Rice Research Group are now available for you to download and read.

The Croplands Research Group met for the fifth time on 7 November in Tampa, Florida, USA alongside the ASA-CSSA-SSSA “Tri Societies” annual meeting. The meeting was attended by 21 Alliance member countries, Alliance Partners and other invited speakers. The short summary version of the 2013 meeting report is now available from the Croplands Research Group page.

The Paddy Rice Research Group held their fifth meeting in Bogor, Indonesia on 25 October alongside the ESAFS11 and was attended by representatives from 6 Alliance member countries, other invited experts and Alliance Partners. To read the summary report for this meeting visit the Paddy Rice Research Group page.

Both these Research Groups have agreed to meet again in the second half of 2014 for their sixth Group meetings.

April 23, 2013   •   News

The first issue of the Paddy Rice Research Group e-News has been released. Download it here: PRRG_e-News_130402.

The newsletter will be sent out to the contact points of member countries and partners and is planned to be issued once every three months or so. The e-News will be a good tool for communicating with eachother. Please transfer and circulate it to anyone whom you know to be interested in the activities of GRA-PRRG.

If you have any useful information that is relevant to the GRA-PRRG, such as events, meetings, publications and others, please send to Kaz Yagi at [email protected].

For more information on the Paddy Rice Research Group and its activities see the Paddy Rice Research Group page.

January 30, 2013   •   News

An article in support of the Paddy Rice Research Group – “Appropriate frequency and time of day to measure methane emissions from an irrigated rice paddy in Japan using the manual closed chamber method” has been published in the Greenhouse Gas Measurement and Management Journal. This research article is the first outcome for the Paddy Rice Research Group activity standardising measurements of greenhouse gas emissions from paddy rice. The next step for this research will be to compare data from irrigated rice paddies with different water management and tropical climates.

Kazunori Minamikawa, Kazuyuki Yagi, Takeshi Tokida, Bjoern Ole Sander & Reiner Wassmann (2012): Appropriate frequency and time of day to measure methane emissions from an irrigated rice paddy in Japan using the manual closed chamber method, Greenhouse Gas Measurement and Management, 2:2-3, 118-128.

Rice agriculture is a large anthropogenic source of atmospheric methane (CH4). The reliable estimation of CH4 emissions requires frequent measurements to trace diurnal and seasonal variations. To evaluate the appropriate intervals and optimal time of day to measure CH4 emissions using the manual closed chamber method, this study analysed four datasets of CH4 fluxes in a Japanese irrigated rice paddy measured at 2-hour intervals using the automated closed chamber method. The typical diurnal variation in the CH4 flux was observed after the rice’s heading stage, during which the daily time-weighted mean CH4 flux was observed twice, in the 08:00–11:59 and 18:00–21:59 time windows. During the flooded rice-growing period, the CH4 emissions, which were estimated by weekly measurements once per day during the 10:00–11:59 time window, corresponded to 93–106% of the emissions calculated using the automated measurement method. In contrast, no regular measurement strategies produced a satisfactory estimate of the CH4 emissions during the non-flooded rice-growing period because of a sharp increase in the CH4 flux just after the drainage. Consequently, the combination of weekly measurements once per day at approximately 10:00 as local mean time for the flooded rice-growing period and daily measurements once per day during the daytime for 1 week after each drainage event is recommended as a strategy to obtain the estimation with a ±10% error.

Read the complete article: Greenhouse Gas Measurement and Management (subscription required)