干旱区生态环境知识资源中心(Arid): Impact of environmental changes and land management practices on wheat production in India

Arid

DOI	10.5194/esd-11-641-2020
	Impact of environmental changes and land management practices on wheat production in India
	Gahlot, Shilpa; Lin, Tzu-Shun; Jain, Atul K.; Roy, Somnath Baidya; Sehgal, Vinay K.; Dhakar, Rajkumar
通讯作者	Roy, SB
来源期刊	EARTH SYSTEM DYNAMICS
ISSN	2190-4979
EISSN	2190-4987
出版年	2020
卷号	11 期号:3 页码:641-652
英文摘要	Spring wheat is a major food crop that is a staple for a large number of people in India and the world. To address the issue of food security, it is essential to understand how the productivity of spring wheat varies with changes in environmental conditions and agricultural management practices. The goal of this study is to quantify the role of different environmental factors and management practices on wheat production in India in recent years (1980 to 2016). Elevated atmospheric CO2 concentration ([CO2]) and climate change are identified as two major factors that represent changes in the environment. The addition of nitrogen fertilizers and irrigation practices are the two land management factors considered in this study. To study the effects of these factors on wheat growth and production, we developed crop growth processes for spring wheat in India and implemented them in the Integrated Science Assessment Model (ISAM), a state-of-the-art land model. The model is able to simulate the observed leaf area index (LAI) at the site scale and observed production at the country scale. Numerical experiments are conducted with the model to quantify the effect of each factor on wheat production on a country scale for India. Our results show that elevated [CO2] levels, water availability through irrigation, and nitrogen fertilizers have led to an increase in annual wheat production at 0.67, 0.25, and 0.26 Mt yr(-1), respectively, averaged over the time period 1980-2016. However, elevated temperatures have reduced the total wheat production at a rate of 0.39 Mt yr(-1) during the study period. Overall, the [CO2], irrigation, fertilizers, and temperature forcings have led to 22 Mt (30 %), 8.47 Mt (12 %), 10.63 Mt (15 %), and -13 Mt (-18 %) changes in countrywide production, respectively. The magnitudes of these factors spatially vary across the country thereby affecting production at regional scales. Results show that favourable growing season temperatures, moderate to high fertilizer application, high availability of irrigation facilities, and moderate water demand make the Indo-Gangetic Plain the most productive region, while the arid north-western region is the least productive due to high temperatures and lack of irrigation facilities to meet the high water demand.
类型	Article
语种	英语
开放获取类型	DOAJ Gold
收录类别	SCI-E
WOS记录号	WOS:000552296500001
WOS关键词	CLIMATE-CHANGE ; ELEVATED CO2 ; CARBON ; WATER ; AGRICULTURE ; SENESCENCE
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/325204
作者单位	[Gahlot, Shilpa; Roy, Somnath Baidya] Indian Inst Technol Delhi, Ctr Atmospher Sci, New Delhi 110016, India; [Lin, Tzu-Shun; Jain, Atul K.] Univ Illinois, Dept Atmospher Sci, 105 S Gregory Ave, Urbana, IL 61801 USA; [Sehgal, Vinay K.; Dhakar, Rajkumar] Indian Agr Res Inst, Dept Agr Phys, New Delhi 110012, India
推荐引用方式 GB/T 7714	Gahlot, Shilpa,Lin, Tzu-Shun,Jain, Atul K.,et al. Impact of environmental changes and land management practices on wheat production in India[J],2020,11(3):641-652.
APA	Gahlot, Shilpa,Lin, Tzu-Shun,Jain, Atul K.,Roy, Somnath Baidya,Sehgal, Vinay K.,&Dhakar, Rajkumar.(2020).Impact of environmental changes and land management practices on wheat production in India.EARTH SYSTEM DYNAMICS,11(3),641-652.
MLA	Gahlot, Shilpa,et al."Impact of environmental changes and land management practices on wheat production in India".EARTH SYSTEM DYNAMICS 11.3(2020):641-652.