干旱区生态环境知识资源中心(Arid): Photosynthetic Physiological Characteristics of Water and Nitrogen Coupling for Enhanced High-Density Tolerance and Increased Yield of Maize in Arid Irrigation Regions

Arid

DOI	10.3389/fpls.2021.726568
	Photosynthetic Physiological Characteristics of Water and Nitrogen Coupling for Enhanced High-Density Tolerance and Increased Yield of Maize in Arid Irrigation Regions
	Guo, Yao; Yin, Wen; Fan, Hong; Fan, Zhilong; Hu, Falong; Yu, Aizhong; Zhao, Cai; Chai, Qiang; Aziiba, Emmanuel Asibi; Zhang, Xijun
通讯作者	Chai, Q (corresponding author), State Key Lab Aridland Crop Sci, Lanzhou, Peoples R China. ; Chai, Q (corresponding author), Gansu Agr Univ, Coll Agron, Lanzhou, Peoples R China.
来源期刊	FRONTIERS IN PLANT SCIENCE
ISSN	1664-462X
出版年	2021
卷号	12
英文摘要	To some extent, the photosynthetic traits of developing leaves of maize are regulated systemically by water and nitrogen. However, it remains unclear whether photosynthesis is systematically regulated via water and nitrogen when maize crops are grown under close (high density) planting conditions. To address this, a field experiment that had a split-split plot arrangement of treatments was designed. Two irrigation levels on local traditional irrigation level (high, I2, 4,050 m(3) ha(-1)) and reduced by 20% (low, I1, 3,240 m(3) ha(-1)) formed the main plots; two levels of nitrogen fertilizer at a local traditional nitrogen level (high, N2, 360 kg ha(-1)) and reduced by 25% (low, N1, 270 kg ha(-1)) formed the split plots; three planting densities of low (D1, 7.5 plants m(-2)), medium (D2, 9.75 plants m(-2)), and high (D3, 12 plants m(-2)) formed the split-split plots. The grain yield, gas exchange, and chlorophyll a fluorescence of the closely planted maize crops were assessed. The results showed that water-nitrogen coupling regulated their net photosynthetic rate (Pn), stomatal conductance (Gs), transpiration rate (Tr), quantum yield of non-regulated non-photochemical energy loss [Y(NO)], actual photochemical efficiency of PSII [Y(II)], and quantum yield of regulated non-photochemical energy loss [Y(NPQ)]. When maize plants were grown at low irrigation with traditional nitrogen and at a medium density (i.e., I1N2D2), they had Pn, Gs, and Tr higher than those of grown under traditional treatment conditions (i.e., I2N2D1). Moreover, the increased photosynthesis in the leaves of maize in the I1N2D2 treatment was mainly caused by decreased Y(NO), and increased Y(II) and Y(NPQ). The coupling of 20%-reduced irrigation with the traditional nitrogen application boosted the grain yield of medium density-planted maize, whose Pn, Gs, Tr, Y(II), and Y(NPQ) were enhanced, and its Y(NO) was reduced. Redundancy analysis revealed that both Y(II) and SPAD were the most important physiological factors affecting maize yield performance, followed by Y(NPQ) and NPQ. Using the 20% reduction in irrigation and traditional nitrogen application at a medium density of planting (I1N2D2) could thus be considered as feasible management practices, which could provide technical guidance for further exploring high yields of closely planted maize plants in arid irrigation regions.
英文关键词	maize irrigation and nitrogen coupling close planting photosynthesis chlorophyll a fluorescence grain yield
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:000705876500001
WOS关键词	SYSTEMIC REGULATION ; DROUGHT TOLERANCE ; USE EFFICIENCY ; NO-TILLAGE ; SENESCENCE ; STRESS ; LIGHT ; PRODUCTIVITY ; FLUORESCENCE ; ACCLIMATION
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/2XILL650/363351
作者单位	[Guo, Yao; Yin, Wen; Fan, Hong; Fan, Zhilong; Hu, Falong; Yu, Aizhong; Zhao, Cai; Chai, Qiang; Aziiba, Emmanuel Asibi; Zhang, Xijun] State Key Lab Aridland Crop Sci, Lanzhou, Peoples R China; [Guo, Yao; Yin, Wen; Fan, Zhilong; Hu, Falong; Yu, Aizhong; Chai, Qiang; Aziiba, Emmanuel Asibi; Zhang, Xijun] Gansu Agr Univ, Coll Agron, Lanzhou, Peoples R China
推荐引用方式 GB/T 7714	Guo, Yao,Yin, Wen,Fan, Hong,et al. Photosynthetic Physiological Characteristics of Water and Nitrogen Coupling for Enhanced High-Density Tolerance and Increased Yield of Maize in Arid Irrigation Regions[J],2021,12.
APA	Guo, Yao.,Yin, Wen.,Fan, Hong.,Fan, Zhilong.,Hu, Falong.,...&Zhang, Xijun.(2021).Photosynthetic Physiological Characteristics of Water and Nitrogen Coupling for Enhanced High-Density Tolerance and Increased Yield of Maize in Arid Irrigation Regions.FRONTIERS IN PLANT SCIENCE,12.
MLA	Guo, Yao,et al."Photosynthetic Physiological Characteristics of Water and Nitrogen Coupling for Enhanced High-Density Tolerance and Increased Yield of Maize in Arid Irrigation Regions".FRONTIERS IN PLANT SCIENCE 12(2021).