干旱区生态环境知识资源中心(Arid): Nitrogen fertilization affects maize grain yield through regulating nitrogen uptake, radiation and water use efficiency, photosynthesis and root distribution

Arid

DOI	10.7717/peerj.10291
	Nitrogen fertilization affects maize grain yield through regulating nitrogen uptake, radiation and water use efficiency, photosynthesis and root distribution
	Su, Wennan; Ahmad, Shakeel; Ahmad, Irshad; Han, Qingfang
通讯作者	Han, QF (corresponding author), Northwest Agr & Forestry Univ, Minist Educ, Key Lab Agr Soil & Water Engn Arid & Semiarid Are, Inst Water Saving Agr Arid Areas China, Yangling, Shaanxi, Peoples R China. ; Han, QF (corresponding author), Northwest Agr & Forestry Univ, Minist Agr, Key Lab Crop Physioecol & Tillage Sci North Weste, Coll Agron, Yangling, Shaanxi, Peoples R China. ; Han, QF (corresponding author), Northwest Agr & Forestry Univ, Coll Agron, Yangling, Shaanxi, Peoples R China.
来源期刊	PEERJ
ISSN	2167-8359
出版年	2020
卷号	8
英文摘要	High external nitrogen (N) inputs can maximize maize yield but can cause a subsequent reduction in N use efficiency (NUE). Thus, it is necessary to identify the minimum effective N fertilizer input that does not affect maize grain yield (GY) and to investigate the photosynthetic and root system consequences of this optimal dose. We conducted a 4-year field experiment from 2014 to 2017 with four N application rates: 300 (N-300), 225 (N-225), 150 (N-150), and 0 Kg ha(-1) (N-0) in the Northwest of China. GY was assessed by measuring the photosynthetic capacity and root system (root volume, surface area, length density and distribution). Grain yield decreased by -3%, 7.7%, and 21.9% when the N application rates decreased by 25%, 50%, and 100% from 300 Kg ha(-1). We found that yield reduction driven by N reduction was primarily due to decreased radiation use efficiency (RUE) and WUE instead of intercepted photosynthetically active radiation and evapotranspiration. In the N-225 treatment, GY, WUE, and RUE were not significantly reduced, or in some cases, were greater than those of the N-300 treatment. This pattern was also observed with relevant photosynthetic and root attributes (i.e., high net photosynthetic rate, stomatal conductance, and root weight, as well as deep root distribution). Our results suggest that application of N at 225 Kg ha(-1) can increased yield by improving the RUE, WUE, and NUE in semi-arid regions.
英文关键词	Maize Nitrogen reduction Root system Resource use efficiency Photosynthesis characteristics
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:000615529800001
WOS关键词	LOESS PLATEAU ; LEAF PHOTOSYNTHESIS ; SOIL ; CHINA ; WHEAT ; GROWTH ; ACQUISITION ; DYNAMICS ; TRAITS ; RATES
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
来源机构	西北农林科技大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/349102
作者单位	[Su, Wennan; Ahmad, Shakeel; Ahmad, Irshad; Han, Qingfang] Northwest Agr & Forestry Univ, Minist Educ, Key Lab Agr Soil & Water Engn Arid & Semiarid Are, Inst Water Saving Agr Arid Areas China, Yangling, Shaanxi, Peoples R China; [Su, Wennan; Ahmad, Shakeel; Ahmad, Irshad; Han, Qingfang] Northwest Agr & Forestry Univ, Minist Agr, Key Lab Crop Physioecol & Tillage Sci North Weste, Coll Agron, Yangling, Shaanxi, Peoples R China; [Su, Wennan; Han, Qingfang] Northwest Agr & Forestry Univ, Coll Agron, Yangling, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Su, Wennan,Ahmad, Shakeel,Ahmad, Irshad,et al. Nitrogen fertilization affects maize grain yield through regulating nitrogen uptake, radiation and water use efficiency, photosynthesis and root distribution[J]. 西北农林科技大学,2020,8.
APA	Su, Wennan,Ahmad, Shakeel,Ahmad, Irshad,&Han, Qingfang.(2020).Nitrogen fertilization affects maize grain yield through regulating nitrogen uptake, radiation and water use efficiency, photosynthesis and root distribution.PEERJ,8.
MLA	Su, Wennan,et al."Nitrogen fertilization affects maize grain yield through regulating nitrogen uptake, radiation and water use efficiency, photosynthesis and root distribution".PEERJ 8(2020).