干旱区生态环境知识资源中心(Arid): Photosynthetic characteristics, yield and quality of sunflower response to deficit irrigation in a cold and arid environment

Arid

DOI	10.3389/fpls.2023.1280347
	Photosynthetic characteristics, yield and quality of sunflower response to deficit irrigation in a cold and arid environment
	Chen, Xietian; Zhang, Hengjia; Teng, Anguo; Zhang, Changlong; Lei, Lian; Ba, Yuchun; Wang, Zeyi
通讯作者	Zhang, HJ
来源期刊	FRONTIERS IN PLANT SCIENCE
ISSN	1664-462X
出版年	2023
卷号	14
英文摘要	In arid regions, deficit irrigation stands as an efficacious strategy for augmenting agricultural water conservation and fostering sustainable crop production. The Hexi Oasis, an irrigation zone situated in Northwest China, serves as a pivotal area to produce grain and cash crops. Nonetheless, due to the predominant conditions of low rainfall and high evaporation, the scarcity of irrigation water has emerged as a critical constraint affecting crop growth and yield in the area. In order to evaluate the effects of deficit irrigation on photosynthetic characteristics, yield, quality, and water use efficiency of sunflower, a two-year field experiment with under-mulched drip irrigation was conducted in the cold and arid environment of the Hexi Oasis region. Water deficits were implemented at sunflower seedling and maturity and consisted of three deficit levels: mild deficit (65-75% field capacity, FC), moderate deficit (55-65% FC), and severe deficit (45-55% FC). A total of six combined water deficit treatments were applied, using full irrigation (75-85% FC) throughout the entire crop-growing season as the control (CK). The results illustrated that water deficit engendered a decrease in leaf net photosynthetic rate, transpiration rate, and stomatal conductance of sunflower compared to CK, with the decrease becoming significant with the water deficit increasing. A mild water deficit, both at the seedling and maturity phases, precipitated a significant enhancement (p< 0.05) in leaf water use efficiency. Under mild water deficit, stomatal limitation emerged as the predominant factor inducing a reduction in the photosynthetic capacity of sunflower leaves, while as the water deficit escalated, non-stomatal limitation progressively assumed dominance. Moreover, a mild/moderate water deficit at seedling and a mild water deficit at maturity (WD1 and WD3) significantly improved sunflower seed quality under consistent yield conditions and significantly increased irrigation water use efficiency, with an average increase of 15.3% and 18.5% over the two years, respectively. Evaluations utilizing principal component analysis and membership function methods revealed that WD1 attained the highest comprehensive score. Consequently, a mild water deficit at both seedling and maturity (WD1) is advocated as the optimal deficit irrigation strategy for sunflower production within the cold and arid environment of Northwest China.
英文关键词	water deficit photosynthetic characteristics yield quality comprehensive evaluation sunflower
类型	Article
语种	英语
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:001111657100001
WOS关键词	HELIANTHUS-ANNUUS L. ; WATER-USE EFFICIENCY ; SEED YIELD ; DRIP IRRIGATION ; OIL QUALITY ; GROWTH ; NITROGEN ; DROUGHT ; LIMITATIONS ; CONDUCTANCE
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/396613
推荐引用方式 GB/T 7714	Chen, Xietian,Zhang, Hengjia,Teng, Anguo,et al. Photosynthetic characteristics, yield and quality of sunflower response to deficit irrigation in a cold and arid environment[J],2023,14.
APA	Chen, Xietian.,Zhang, Hengjia.,Teng, Anguo.,Zhang, Changlong.,Lei, Lian.,...&Wang, Zeyi.(2023).Photosynthetic characteristics, yield and quality of sunflower response to deficit irrigation in a cold and arid environment.FRONTIERS IN PLANT SCIENCE,14.
MLA	Chen, Xietian,et al."Photosynthetic characteristics, yield and quality of sunflower response to deficit irrigation in a cold and arid environment".FRONTIERS IN PLANT SCIENCE 14(2023).