Rise In CO2 Level Declines Quality Of Important Food Crop
Rise In CO2 Level Declines Quality Of Important Food Crop
Global warming may have 'devastating' effects on rice: study
26 May, 2018, 15:39
"If we do nothing, then yes, there is this potential for profound negative impacts on human health", saidKristie Ebi, a public health researcher at the University of Washington in Seattle and one of the authors of the study, which also involved researchers at institutions in China, Japan, Australia and the United States, including at the US Agriculture Department. A system of pipes delivered different levels of Carbon dioxide to the rice plants. The scientists have found that human-caused greenhouse gas emissions in the atmosphere will make rice less nutritious.
On average, protein content fell 10.3 per cent, iron dropped eight percent and zinc was reduced by 5.1 percent, compared to rice grown today under current Carbon dioxide conditions.
The conclusion that rice will become less nutritional as climate change continues carries significant consequences for more than two billion people who depend on the grain as their primary food source.
The researchers looked at the countries that consumed more rice - on populations that took half of their daily calories from rice.
The finding remains true - although at different levels of impact - for the 18 varieties or hybrids of rice tested so far. These vitamins are vital for the people to clinch in the energy from the food.
As global temperatures rise in response to ever greater levels of Carbon dioxide and other greenhouse gases in the atmosphere, harvests of all the staple cereals could in any case decline - sometimes as a response to ever wilder extremes of heat, rain and windstorm - by between 20 and 40%.
Testing higher Carbon dioxide in rice paddies in China indicates loss in four vitamins - B1, B2, B5, and B9 - as per the reports on May 23 in Science Advances. "Folate [vitamin B9] declines across the nine rice varieties ranged from 10 percent to 45 percent".
The research was funded by National Basic Research Program of China, Natural Science Foundation of Jiangsu Province in China, and Youth Innovation Promotion Association of Chinese Academy of Sciences.
"Overall, these results indicate that the role of rising Carbon dioxide on reducing rice quality may represent a fundamental, but under-appreciated, human health effect associated with anthropogenic climate change".
"People say more Carbon dioxide is more plant food - and it is". "Reductions in the nutritional quality of rice could affect maternal and child health for millions of people".
Scientists from China, Japan, the U.S. and Australia report in the journal Science Advances that they began their research, using what they call the technique of free air carbon dioxide enrichment, in 1998, to recreate what they expect to be the conditions under which farmers will grow crops a few decades from now.
Some varieties of rice may not experience as severe of a nutrient loss as carbon dioxide levels go up. That knowledge gives researchers an opportunity, given enough funding, to breed climate change-resistant strains of rice.
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