Featured Research

from universities, journals, and other organizations

Rising temperatures hinder Indian wheat production

Date:
July 23, 2014
Source:
University of Southampton
Summary:
A link between increasing average temperatures in India and a reduction in wheat production has been found by researchers. They have shown that recent warmer temperatures in the country's major wheat belt are having a negative effect on crop yield. More specifically, they found a rise in nighttime temperatures is having the most impact.

Geographers at the University of Southampton have found a link between increasing average temperatures in India and a reduction in wheat production.

Researchers Dr John Duncan, Dr Jadu Dash and Professor Pete Atkinson have shown that recent warmer temperatures in the country's major wheat belt are having a negative effect on crop yield. More specifically, they found a rise in nighttime temperatures is having the most impact.

Dr Jadu Dash comments: "Our findings highlight the vulnerability of India's wheat production system to temperature rise, which is predicted to continue in the coming decades as a consequence of climate change. We are sounding an early warning to the problem, which could have serious implications in the future and so needs further investigation."

The researchers used satellite images taken at weekly intervals from 2002 to 2007 of the wheat growing seasons to measure 'vegetation greenness' of the crop -- acting as an indicator of crop yield. The satellite imagery, of the north west Indo-Gangetic plains, was taken at a resolution of 500m squared -- high enough to capture variations in local agricultural practices. The data was then compared with climate and temperature information for the area to examine the effect on growth and development of the crop.

The study, published in the journal Global Change Biology, found that:

  • warmer temperature events have reduced crop yield
  • in particular, warmer temperatures during the reproductive and grain-filling (ripening) periods had a significant negative impact on productivity
  • warmer minimum daily temperatures (nighttime temperatures) had the most significant impact on yield

In some areas of the Indian wheat belt, growers have been bringing forward their growing season in order to align the most sensitive point of the crop growth cycle with a cooler period. However, the researchers have also shown that in the long-term this will not be an effective way of combating the problem, because of the high level of average temperature rise predicted for the future.

Dr Dash comments: "Our study shows that, over the longer period, farmers are going to have to think seriously about changing their wheat to more heat tolerant varieties in order to prevent temperature-induced yield losses.

"Currently in India, 213 million people are food insecure and over 100 million are reliant on the national food welfare system, which uses huge quantities of wheat. This underlines how crucial it is to consider what types of wheat need to be grown in the coming decades to secure production.

"We hope that soon, we will be able to examine agricultural practices in even greater detail -- with the launch of the European Space Agency's Sentinel satellites which will provide regular data at even higher spatial resolution."


Story Source:

The above story is based on materials provided by University of Southampton. Note: Materials may be edited for content and length.


Journal Reference:

  1. John. M. A. Duncan, Jadunandan Dash, Peter. M. Atkinson. Elucidating the impact of temperature variability and extremes on cereal croplands through remote sensing. Global Change Biology, 2014; DOI: 10.1111/gcb.12660

Cite This Page:

University of Southampton. "Rising temperatures hinder Indian wheat production." ScienceDaily. ScienceDaily, 23 July 2014. <www.sciencedaily.com/releases/2014/07/140723110417.htm>.
University of Southampton. (2014, July 23). Rising temperatures hinder Indian wheat production. ScienceDaily. Retrieved October 23, 2014 from www.sciencedaily.com/releases/2014/07/140723110417.htm
University of Southampton. "Rising temperatures hinder Indian wheat production." ScienceDaily. www.sciencedaily.com/releases/2014/07/140723110417.htm (accessed October 23, 2014).

Share This



More Plants & Animals News

Thursday, October 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Working Mother DIY: Pumpkin Pom-Pom

Working Mother DIY: Pumpkin Pom-Pom

Working Mother (Oct. 22, 2014) How to make a pumpkin pom-pom. Video provided by Working Mother
Powered by NewsLook.com
San Diego Zoo's White Rhinos Provide Hope for the Critically Endangered Species

San Diego Zoo's White Rhinos Provide Hope for the Critically Endangered Species

Reuters - Light News Video Online (Oct. 22, 2014) The pair of rare white northern rhinos bring hope for their species as only six remain in the world. Elly Park reports. Video provided by Reuters
Powered by NewsLook.com
Raw: Bear Cub Strolls Through Oregon Drug Store

Raw: Bear Cub Strolls Through Oregon Drug Store

AP (Oct. 22, 2014) Shoppers at an Oregon drug store were surprised by a bear cub scurrying down the aisles this past weekend. (Oct. 22) Video provided by AP
Powered by NewsLook.com
Family Pleads for Pet Pig to Stay at Home

Family Pleads for Pet Pig to Stay at Home

AP (Oct. 22, 2014) The Johnson family lost their battle with the Chesterfield County, Virginia Planning Commission to allow Tucker, their pet pig, to stay in their home, but refuse to let the board keep Tucker away. (Oct. 22) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins