Stimulated fine root growth benefits maize nutrient uptake under optimized nitrogen management

doi:10.1002/ece3.3088

	Stimulated fine root growth benefits maize nutrient uptake under optimized nitrogen management
	Zeng, X.; Peng, Y.
	2017
发表期刊	INTERNATIONAL JOURNAL OF PLANT PRODUCTION
ISSN	1735-6814
卷号	11 期号:1 页码:89-100
摘要	Optimized nitrogen (N) management reduces total N application without sacrificing crop yield. However, the underlining mechanisms have not been well investigated, especially lacking the evidence from roots. Here we performed a two-year field experiment with maize grown under zero-N, conventional N and optimized N applications and examined grain yield, N, phosphorous (P) and potassium (K) uptake and root length in diverse diameter classes. Results showed that both conventional N and optimized N managements significantly increased plant nutrient contents and grain yield compared with zero-N treatment, but no obvious difference was observed between the two N-fertilized treatments. Notably, the response of different nutrients to N application was not synchronous temporally over the growth period, following the order of N first, P second and K last. Though N application generally had minor impact on total root length and root biomass, optimized N regime significantly increased fine root (diameter <= 0.2 mm) length compared with conventional N at the eighth leaf emerged stage. The stimulated fine root growth under optimized N management is beneficial for adequate N uptake during the key growth stage, which determines subsequent PK acquisition and final crop yield. Our findings highlight the importance of fine roots in maize NPK uptake and a better understanding of the response of fine roots to changes in N availability may therefore be critical for optimizing N input in maize farming system.
关键词	Root length Phosphorous (P) Potassium (K) Leafarea Grain yield Zea mays L
学科领域	Environmental Sciences & Ecology ; Evolutionary Biology
DOI	10.1002/ece3.3088
收录类别	SCI
语种	英语
WOS关键词	NITRATE ; YIELD ; WATER ; GRAIN ; PHOSPHORUS ; DYNAMICS ; FIELD
WOS记录号	WOS:000406323100043
出版者	SPRINGER
文献子类	Article
出版地	NEW YORK
EISSN	1735-8043
资助机构	National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31400417] ; China Postdoctoral Science FoundationChina Postdoctoral Science Foundation [2014T70140, 2013M540160]
作者邮箱	pengyf@ibcas.ac.cn
作品OA属性	gold, Green Published
引用统计	被引频次：8[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/22249
专题	植被与环境变化国家重点实验室
作者单位	1.[Zeng, X.] Chinese Acad Agr Engn, Inst Protected Agr, Beijing 100125, Peoples R China 2.[Peng, Y.] China Agr Univ, Coll Resources & Environm Sci, Ctr Resources Environm & Food Secur, Key Lab Plant Soil Interact,MOE, Beijing 100193, Peoples R China 3.[Peng, Y.] Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China
推荐引用方式 GB/T 7714	Zeng, X.,Peng, Y.. Stimulated fine root growth benefits maize nutrient uptake under optimized nitrogen management[J]. INTERNATIONAL JOURNAL OF PLANT PRODUCTION,2017,11(1):89-100.
APA	Zeng, X.,&Peng, Y..(2017).Stimulated fine root growth benefits maize nutrient uptake under optimized nitrogen management.INTERNATIONAL JOURNAL OF PLANT PRODUCTION,11(1),89-100.
MLA	Zeng, X.,et al."Stimulated fine root growth benefits maize nutrient uptake under optimized nitrogen management".INTERNATIONAL JOURNAL OF PLANT PRODUCTION 11.1(2017):89-100.

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