干旱区生态环境知识资源中心(Arid): Water deficit index to evaluate water stress status and drought tolerance of rainfed barley genotypes in cold semi-arid area of Iran

Arid

DOI	10.1016/j.agwat.2021.107395
	Water deficit index to evaluate water stress status and drought tolerance of rainfed barley genotypes in cold semi-arid area of Iran
	Feiziasl, V; Jafarzadeh, J.; Sadeghzadeh, B.; Shalmani, M. A. Mousavi
通讯作者	Feiziasl, V
来源期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
EISSN	1873-2283
出版年	2022
卷号	262
英文摘要	Drought and heat are major stresses that adversely affect crop production in arid and semi-arid regions. This study assessed the water stress status of rainfed barley genotypes and identified their critical drought stress threshold in the cold semi-arid area of Iran. The field experiments were conducted at the Dryland Agricultural Research Institute, Maragheh, Iran in 2015-16 and 2017-18. The experimental design was a split-plot arrangement in a randomized complete block design with three replications. The main plots included two water regimes, rainfed (stress) and supplemental irrigation, and the subplots included 15 barley genotypes. Data were collected for grain yield, and its components, surface temperature (Ts) taken at six crop growth stages from flag leaf to soft dough, and normalized differences vegetative index (NDVI) at seven crop growth stages from the first node to the soft dough. The water deficit index (WDI) was determined using NDVI and the difference between Ts and air temperature (Ta). Based on the WDI, the critical water stress and temperature thresholds for genotypes were 0.59, and 24.3 degrees C, respectively. The identified temperature threshold was equivalent to 7.2 mm day(-1) evapotranspiration (ET0) and 4.3 kPa vapor pressure deficient. The genotypes experienced a maximum drought stress when the WDI, Ts, and ET0 reached 1.01, 34.6 degrees C (upper limit), and 11.6 mm day(-1), respectively. The critical drought threshold happened 254 days after the sowing date. WDI had strong negative correlation with both grain and biological yields. According to WDI, Ghara Arpa, Kuban-06, and Ansar genotypes were placed in the drought-tolerant group and are suitable for rainfed conditions, whereas ARM-ICB, Sahand, Sararood1, and Ste/Antares//YEA762 genotypes were more suitable for supplemental irrigation conditions. It can be concluded that WDI could effectively discriminate genotypes into tolerant and susceptible groups, and identify the starting time of water stress under rainfed conditions.
英文关键词	Canopy temperature NDVI Supplemental irrigation Rainfed conditions Surface temperature
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000788760900003
WOS关键词	TEMPERATURE ; PLANT ; PRESSURE ; GROWTH ; WHEAT ; WIND ; SOIL
WOS类目	Agronomy ; Water Resources
WOS研究方向	Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/391582
推荐引用方式 GB/T 7714	Feiziasl, V,Jafarzadeh, J.,Sadeghzadeh, B.,et al. Water deficit index to evaluate water stress status and drought tolerance of rainfed barley genotypes in cold semi-arid area of Iran[J],2022,262.
APA	Feiziasl, V,Jafarzadeh, J.,Sadeghzadeh, B.,&Shalmani, M. A. Mousavi.(2022).Water deficit index to evaluate water stress status and drought tolerance of rainfed barley genotypes in cold semi-arid area of Iran.AGRICULTURAL WATER MANAGEMENT,262.
MLA	Feiziasl, V,et al."Water deficit index to evaluate water stress status and drought tolerance of rainfed barley genotypes in cold semi-arid area of Iran".AGRICULTURAL WATER MANAGEMENT 262(2022).