Navigation Links
Is rainfall a greater threat to China's agriculture than warming?

New research into the impact of climate change on Chinese cereal crops has found rainfall has a greater impact than rising temperature. The research, published in the Journal of the Science of Food and Agriculture found that while maize is sensitive to warming increases in temperature from 1980 onwards correlated with both higher and lower yields of rice and wheat.

The study was carried by Dr. Tianyi Zhang, from the Institute of Atmospheric Physics, and Dr. Yao Huang, from the Institute of Botany, both at the Chinese Academy of Sciences. The paper is part of a special collection of free articles on the links between climate change, agriculture and the function of plants.

"China has experienced significant climate change over the last century", said Zhang. "The annual mean air temperature increased by 1.1 C from 1951 to 2001, rainfall in Western China increased by up to 15% per decade and decreased in the North."

"Projections from climate models predict that mean temperature could rise by 2.3-3.3 C by 2050 while rainfall could increase by 5-7%," said Huang. "This could have a major impact on China's agriculture which accounts for 7% of the world's arable land but feeds about 22% of the global population."

The authors turned to China's provincial agricultural statistics and compared the data to climate information from the China Meteorological Administration. They focused their analysis on China's main cereal crops, rice, which is grown throughout China, as well as wheat and maize, which are mainly grown in the North.

The results show a significant warming trend in China from 1980 to 2008 and that maize is particularly sensitive to warming. However, they also found that rising temperature collated with both higher and lower wheat and rice yields, refuting the thoughts that warming often results in a decline in harvests.

"Of the three cereal crops, further analysis suggested that reduction in yields with higher temperature is accompanied by lower rainfall, which mainly occurred in northern parts of China," said Zhang. "This suggests it was potentially droughts, relative to warming, that more affected harvest yields in the current climate."

"It is often claimed that the rising temperature causes a decrease in the yields of Chinese cereal crops, yet our results show that warming had no significant harmful effect on cereal yields especially for rice and wheat at a national scale from 1980 to 2008," concluded Zhang and Huang. "However, warming may still plays an indirect role, like the exacerbated drought conditions caused by the rising temperatures."


Contact: Ben Norman

Related biology news :

1. Evidence of past Southern hemisphere rainfall cycles related to Antarctic temperatures
2. Rainfall suspected culprit in leaf disease transmission
3. Landslides: How rainfall dried up Panamas drinking water
4. University of Miami scientists find new way to estimate global rainfall and track ocean pollution
5. Volcanic eruptions affect rainfall over Asian monsoon region
6. Ethiopias climate 27 million years ago had higher rainfall, warmer soil
7. The sky is not falling: Pollution in eastern China cuts light, useful rainfall
8. Nearby chimpanzee populations show much greater genetic diversity than distant human populations
9. Postmenopausal women at greater risk of stroke from high trans fat intake
10. Climate sensitivity greater than previously believed
11. Climate change effect on release of CO2 from peat far greater than assumed
Post Your Comments:
(Date:6/9/2016)... 9, 2016 Paris Police ... video security solution to ensure the safety of people and ... during the major tournament Teleste, an international technology ... services, announced today that its video security solution will be ... back up public safety across the country. The system roll-out ...
(Date:6/2/2016)... LONDON , June 2, 2016 ... has awarded the 44 million US Dollar project, ... Security Embossed Vehicle Plates including Personalization, Enrolment, and IT Infrastructure ... world leader in the production and implementation of Identity Management ... in January, however Decatur was selected ...
(Date:6/1/2016)... June 1, 2016 Favorable Government ... Administration and Criminal Identification to Boost Global Biometrics System ... released TechSci Research report, " Global Biometrics Market ... Forecast and Opportunities, 2011 - 2021", the global biometrics ... 2021, on account of growing security concerns across various ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... ... June 23, 2016 , ... Supplyframe, the Industry Network ... Supplyframe Design Lab . Located in Pasadena, Calif., the Design Lab’s mission is ... projects are designed, built and brought to market. , The Design Lab is ...
(Date:6/23/2016)...  Blueprint Bio, a company dedicated to identifying, protecting ... has closed its Series A funding round, according to ... "We have received a commitment from Forentis Fund that ... meet our current goals," stated Matthew Nunez . ... complete validation on the current projects in our pipeline, ...
(Date:6/23/2016)... ... June 23, 2016 , ... ... regulatory and technical consulting, provides a free webinar on Performing Quality ... 13, 2016 at 12pm CT at no charge. , Incomplete investigations are still ...
(Date:6/22/2016)... 2016 Cell Applications, Inc. and StemoniX ... produce up to one billion human induced pluripotent ... week. These high-quality, consistent stem cells enable researchers ... spend more time doing meaningful, relevant research. This ... manufacturing process that produces affordable, reliable HiPSC for ...
Breaking Biology Technology: