[EBOOK] Water-wise Rice Production, Edited by B.A.M. Bouman, H. Hengsdijk, B. Hardy, P.S. Bindraban, T.P. Tuong, and J.K. Ladha, IRRI

Food security in Asia is challenged by increasing food demand and threatened by declining water availability. More than 75% of the annual rice supply comes from 79 million ha of irrigated paddy land. Thus, the present and future food security of Asia depends largely on the irrigated rice production system. However, rice is a profligate user of water. It takes 3,000-5,000 liters to produce 1 kilogram of rice, which is about 2 to 3 times more than to produce 1 kilogram of other cereals such as wheat or maize. Until recently, this amount of water has been taken for granted. Now, however, the water crisis threatens the sustainability of the irrigated rice ecosystem. In Asia, 17 million ha of irrigated rice areas may experience “physical water scarcity” and 22 million ha “economic water scarcity” by 2025. To safeguard food security and preserve precious water resources, ways must be explored to grow rice using less water. Various studies are under way to develop water-saving technologies for rice production, and there is a need to take stock and review the progress.

IRRI, together with Plant Research International of Wageningen University and Research Centre (WUR-PRI; The Netherlands), organized a thematic workshop on Water-Wise Rice Production held 8-11 April 2002 at IRRI, Los Banos, Philippines. The objectives were to present and discuss the state-of-the-art in the development, dissemination, and adoption of water-saving technologies at spatial scales ranging from the field to irrigation system. The workshop brought together scientists and irrigation system managers from several consortia and projects examining water scarcity in rice production: the Water Workgroup of the Irrigated Rice Research Consortium, the Rice-Wheat Consortium, and the projects “Water-less Rice,” Growing More Rice with Less Water,” and “Ground Cover Rice Production Systems.” In total, there were 75 participants from 12 countries. At the workshop, the participants created the International Platform for Saving Water in Rice (IPSWAR; www.irri.org/ipswar/ about_us/ipswar.htm). The platform’s purpose is to be a mechanism to increase the efficiency and enhance the coherence of research on water savings in rice-based cropping systems in Asia.

This book contains the papers presented at the workshop. One chapter of the book is included as a video on CD-ROM in the back of the book.

[EBOOK] Water-wise Rice Production, Edited by B.A.M. Bouman, H. Hengsdijk, B. Hardy, P.S. Bindraban, T.P. Tuong, and J.K. Ladha, IRRI

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