کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6327882 1619768 2015 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Current irrigation practices in the central United States reduce drought and extreme heat impacts for maize and soybean, but not for wheat
ترجمه فارسی عنوان
شیوه های فعلی آبیاری در مرکز ایالات متحده باعث کاهش خشکسالی و گرمای شدید برای ذرت و سویا می شود، اما نه برای گندم
کلمات کلیدی
اثر سازگار، آبیاری، گرما شدید خشکی، تجربی،
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
چکیده انگلیسی
In this study, we assessed the adaptive effects of irrigation on climatic risks for three crops (maize, soybean, and wheat) at the regional scale from 1981 to 2012 in the Central US. Based on yields of 183 counties for maize, 121 for soybean and 101 for wheat, statistical models were developed for irrigated, rainfed and county-level yields. Results show that irrigation has a statistically significant effect on abating detrimental climate impacts, specifically drought and extreme heat, in maize and soybean but not in wheat. On average, irrigation reduces the negative influences of extreme heat by around 7.2% for maize and 5.0% for soybean yields for each additional 10 degree-days above the optimal temperature for each crop. This is approximately two-thirds of the negative effects of extreme heat under rainfed management. The remaining third of the yield reduction is caused by heat damage that cannot be alleviated by irrigation. No significant differences were detected between county yields and irrigated yields for maize and soybean, suggesting that the existing irrigation practices were reasonably efficient. Efforts to mitigate future climate risks for these two crops should focus on improving the heat sensitivity contributing to the yield losses from heat damage. In contrast, the existing irrigation does not improve the resilience of wheat to climate risks. Both increased temperature and drought were critical to wheat production, which was potentially caused by relatively poor irrigation supplies for wheat. Further enhancement of wheat yield may be possible through improved irrigation management.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Science of The Total Environment - Volume 508, 1 March 2015, Pages 331-342
نویسندگان
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