کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8878933 | 1624429 | 2018 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Simulated adaptation strategies for spring wheat to climate change in a northern high latitude environment by DAYCENT model
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم زراعت و اصلاح نباتات
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Simulated adaptation strategies for spring wheat to climate change in a northern high latitude environment by DAYCENT model Simulated adaptation strategies for spring wheat to climate change in a northern high latitude environment by DAYCENT model](/preview/png/8878933.png)
چکیده انگلیسی
In order to identify strategies to support global food security while protecting the environment under future climate in northern high latitude environments such as the Canadian Prairies, the DAYCENT model was calibrated, validated, and subsequently used to project effects of climate change (increased carbon dioxide concentration, precipitation, and temperature), nitrogen (N) application rate, and yield potential (radiation use efficiency of biomass, RUEB) of spring wheat (Triticum aestivum L.) on yield production and environmental outputs. Results indicated that projected grain yield and environmental impacts, i.e. soil organic carbon (SOC), N leached below root zone and nitrous oxide (N2O) emission, are affected by different climate change scenarios, N fertilizer rate and RUEB. From these results, we can assess impacts of fertilizer rates on projected grain yield and environmental impacts (SOC, N leaching and N2O emission) in the near future (2017-2046) and distant future (2047-2076). In the near future, if wheat RUEB is improved from current 38-43â¯mgâ¯Câ¯kJâ1, the projected yield over seven climate change scenarios will increase 35% with a fertilizer rate of 100â¯kgâ¯Nâ¯haâ1 compared to the current rate (50â¯kgâ¯Nâ¯haâ1). Corresponding increases of N leaching, N2O emission and final SOC in 2046 are 29, 35 and 12%, respectively. Additional increases of yield and SOC will be small if more N is added, while N leaching and N2O emission will be further increased. Assuming the cultivar grown in the distant future is improved to 53â¯mgâ¯Câ¯kJâ1 RUEB and the fertilizer rate is raised to 125â¯kgâ¯Nâ¯haâ1, projected yield, N leaching, N2O emission and final SOC in 2076 will be increased by 69, 26, 56 and 80%, respectively. If the N input is increased to 150â¯kgâ¯Nâ¯haâ1, corresponding increases will be 83, 30, 103 and 151%. It seems that appropriate N input could be 100-125â¯kgâ¯Nâ¯haâ1 for the near future and distant future, respectively in order to balance production and environmental impacts. Results of our study indicated that after modification and calibration, DAYCENT model can be used to identify adaptation strategies for food security and environmental protection in high latitude environments under future climate change.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: European Journal of Agronomy - Volume 95, April 2018, Pages 45-56
Journal: European Journal of Agronomy - Volume 95, April 2018, Pages 45-56
نویسندگان
Xiaobo Qin, Hong Wang, Yong He, Yu'e Li, Zhiguo Li, Qingzhu Gao, Yunfan Wan, Budong Qian, Brian McConkey, Ron DePauw, Reynald Lemke, William J. Parton,