干旱区生态环境知识资源中心(Arid): Potential benefits of genotype-based adaptation strategies for grain sorghum production in the Texas High Plains under climate change

Arid

DOI	10.1016/j.eja.2020.126037
	Potential benefits of genotype-based adaptation strategies for grain sorghum production in the Texas High Plains under climate change
	Kothari, Kritika; Ale, Srinivasulu; Bordovsky, James P.; Porter, Dana O.; Munster, Clyde L.; Hoogenboom, Gerrit
通讯作者	Ale, S
来源期刊	EUROPEAN JOURNAL OF AGRONOMY
ISSN	1161-0301
EISSN	1873-7331
出版年	2020
卷号	117
英文摘要	Adaptation measures are required to enhance climate change resilience of agricultural systems and reduce risks associated with climate change at both regional and global scales. The Texas High Plains is a semi-arid region that faces major challenges from climate change risks and dwindling groundwater supply from the exhaustible Ogallala Aquifer for sustaining irrigated agriculture. The overall goal of this study was to assess the impacts of climate change on yield and water use of grain sorghum and identify optimum climate change adaptation strategies for three study sites in the Texas High Plains. Future climate data projected by nine Global Circulation Models (GCMs) under two Representative Concentration Pathways (RCPs) of greenhouse gas emissions (RCPs 4.5 and 8.5) were used as input for the DSSAT CSM-CERES-Sorghum model. The climate change adaptation strategies were designed by modifying crop genotype parameters to incorporate drought tolerance, heat tolerance, high yield potential, and long maturity traits. Irrigated and dryland grain sorghum yield and irrigation water use were projected to decrease at varying percentages at the study sites in the future. On an average (of 9 GCMs), irrigated grain sorghum yield is expected to decrease by 5-13 % and 16-27 % by mid-century (2036-2065) and late-century (2066-2095), respectively under RCP 8.5 compared to the baseline (1976-2005). The irrigation water use is expected to decrease by 7-9% and 14-16 % by the mid-century and late-century, respectively. Among the adaptation strategies, an ideotype with high yield potential trait (10 % higher partitioning to the panicle, radiation use efficiency, and relative leaf size than the reference cultivar) resulted in maximum grain sorghum yield gains in the future under both irrigated (6.9 %-17.1 %) and dryland (7.5 %-17.1 %) conditions, when compared to the reference cultivar. Enhancing drought tolerance by increasing root density at different soil depths also resulted in a significantly higher irrigated grain sorghum yield than the reference cultivar. A longer maturity cultivar will likely increase irrigation water use and, therefore, is not recommended for water limited conditions.
英文关键词	Drought tolerance DSSAT CSM CERES-Sorghum Genetic adaptation Heat tolerance Long maturity Yield potential
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:000532043200006
WOS关键词	ATMOSPHERIC CARBON-DIOXIDE ; WATER-USE ; USE EFFICIENCIES ; ELEVATED CO2 ; COMPUTER-PROGRAM ; DROUGHT STRESS ; YIELD ; MODEL ; TEMPERATURE ; SYSTEM
WOS类目	Agronomy
WOS研究方向	Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/324436
作者单位	[Kothari, Kritika; Ale, Srinivasulu; Bordovsky, James P.; Porter, Dana O.; Munster, Clyde L.] Texas A&M Univ, Dept Biol & Agr Engn, College Stn, TX 77843 USA; [Kothari, Kritika] Univ Kentucky, Plant & Soil Sci Dept, Lexington, KY 40546 USA; [Ale, Srinivasulu] Texas A&M Univ Syst, Texas A&M AgriLife Res, POB 1658, Vernon, TX 76385 USA; [Bordovsky, James P.] Texas A&M Univ Syst, Texas A&M AgriLife Res, Plainview, TX 79072 USA; [Porter, Dana O.] Texas A&M Univ Syst, Texas A&M AgriLife Res & Extens Ctr, Lubbock, TX 79403 USA; [Hoogenboom, Gerrit] Univ Florida, Inst Sustainable Food Syst, Gainesville, FL 32611 USA; [Hoogenboom, Gerrit] Univ Florida, Dept Agr & Biol Engn, Gainesville, FL 32611 USA
推荐引用方式 GB/T 7714	Kothari, Kritika,Ale, Srinivasulu,Bordovsky, James P.,et al. Potential benefits of genotype-based adaptation strategies for grain sorghum production in the Texas High Plains under climate change[J],2020,117.
APA	Kothari, Kritika,Ale, Srinivasulu,Bordovsky, James P.,Porter, Dana O.,Munster, Clyde L.,&Hoogenboom, Gerrit.(2020).Potential benefits of genotype-based adaptation strategies for grain sorghum production in the Texas High Plains under climate change.EUROPEAN JOURNAL OF AGRONOMY,117.
MLA	Kothari, Kritika,et al."Potential benefits of genotype-based adaptation strategies for grain sorghum production in the Texas High Plains under climate change".EUROPEAN JOURNAL OF AGRONOMY 117(2020).