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Scientists urged to speed up heat crop research by blair zhang
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Scientists urged to speed up heat crop research |
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Du Huabin newspaper reporter in Canada, U.S. scientists recently in "Science" magazine published a study warning that, due to global warming, the world will be the period from 2040 to 2060 food crisis faced by long-lasting. By that time, climate warming will also result in most regions of the world crop is significantly reduced. Reported that regions of the world previously suffered extreme hot weather,
Du Huabin newspaper reporter in Canada
U.S. scientists recently in "Science" magazine published a study warning that, due to global warming, the world will be the period from 2040 to 2060 food crisis faced by long-lasting. By that time, climate warming will also result in most regions of the world crop is significantly reduced.
Reported that regions of the world previously suffered extreme hot weather, as in 2003, Europe experienced extremely hot summer weather may be a few years become a popular summer temperatures. Despite the extreme hot weather of summer temperatures become the norm until the middle of this century, but only some parts of the world, but scientists believe that extreme hot weather in the period 2080 to 2100 will be a global Chang Tai phenomenon.
The study was funded by two University of Washington and Stanford scientists completed. Research model used by the "Intergovernmental Panel on Climate Change," developed a computer simulation model to rely on future weather patterns, its strengths are its reasonable accuracy on the average temperature estimates. Before, many studies model to forecast the result of the accumulation of greenhouse gases in the atmosphere, the impact of climate research focused on the threat of drought on the subtropical region, while not studied the problems caused by high temperatures. The new research project will focus on the impact of high temperatures. In fact the extreme hot weather on crops and the impact of drought on crop damage caused by par. Plant itself has its own optimum temperature of growth and breeding, once over the appropriate temperature, determine the development and production of leaves the size of the kernel will be affected by two factors.
Report that rising temperatures will lead to heat-sensitive crops are withering, including essential staple of daily life wheat crop, resulting in lower production of 20% to 40%%%. In addition to the main cereal crops of wheat, the Rice and corn are also particularly sensitive to heat. High temperature of some heat-resistant crops, such as sorghum, millet and other millet crops of small, but the taste of these crops are not necessarily suitable for mass demand.
In recent years, France has been as a result of extreme hot weather crop, but other parts of the world grain production has not been affected, the impact of cuts in France have not been too much attention. The new findings show that in the future due to extreme hot weather will also appear in many regions, will cause the world food also significantly cut. Researcher, University of Washington climate scientist David? Batisidi in an interview, warned that some of the world's most important grain output in tropical and subtropical regions have dire results, because in those areas now, there have been many people hungry.
Dr. Batisidi that the impact of climate change on agriculture is greater than sea-level rise impact on coastal cities. He said the impact on agriculture in 100 years will become a reality within, and the impact of sea level rise may be only three or four hundred years later become a real threat. In his view, this is the most powerful evidence that the world needed to take steps against global warming, or to find out the method should decrease crop yield.
The impact of climate change on agriculture are also in dispute. Some people believe that rising temperatures on the northern countries such as Russia and Canada to extend the benefit of farming time, and crops with higher carbon dioxide concentrations in the environment will grow better. However, Dr. Batisidi, high temperature of the northern countries will only be in the next several decades to be useful, but to the end of the century, the northern countries will be high the pressure. And near the Arctic region, where the frozen soil is not fertile, not suitable for farming.
Scientists believe that the world should fall crop yields due to climate warming is one way to accelerate the development of more heat-resistant crop varieties, although this requires scientists continued efforts for decades. ( I am Cheap On Sales writer, reports some information about pierre cardin suit , multi pocket vest.
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