Geoscience Reference
In-Depth Information
ChApteR eIGht
Global warming impact
on rice crop productivity
D.P. Singh
Contents
Abstract
187
8.1 Introduction
188
8.2
Global warming
188
8.3
Global warming and rice productivity
189
8.4
Land and water resources for rice
191
8.5
Salinity, flooding and rice
193
8.6
Water shortage and rice productivity
194
8.7
Global warming and its impact on pests, diseases
and weeds
194
8.8
Strategies for mitigating effects of global
warming on rice production
195
References
196
Abstract
Rice is a major food crop of Asia and of the world. The
impact of global warming on rice may be due to a rise in
sea level, thus resulting in inundated lands with sea water
which makes these lands unsuitable for rice cultivation.
Climate change is estimated to affect 20 million hectares
of the world's rice-growing area adversely, mainly in India
and Bangladesh. It is forecasted by the International Food
Policy Research Institute that by 2050, the rice prices
will increase between 32% and 37% as a result of climate
change due to the reduction in rice productivity by 14% in
South Asia, 10% in East Asia and the Pacific and 15%
in sub-Saharan Africa. The rise in carbon dioxide levels
in the environment may result in higher biomass in rice,
which, depending on the type of cultivars, may or may not
187