Fate of 15N fertilizer under different nitrogen split applications to plastic mulched maize in semiarid farmland

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	Fate of 15N fertilizer under different nitrogen split applications to plastic mulched maize in semiarid farmland
	Shaojie Wang 1,4; Shasha Luo 3; Shanchao Yue 1; Yufang Shen 1; Shiqing Li 1,2
刊名	NUTRIENT CYCLING IN AGROECOSYSTEMS
	2016-04-18
通讯作者邮箱	sqli@ms.iswc.ac.cn
期号	105 页码:129-140
关键词	15N recovery Dryland N application Grain yield Plastic mulching
通讯作者	Li, SQ
英文摘要	A 2-year field microplot experiment was conducted to determine the effects of nitrogen (N) splits on grain yields and the fate of 15N-labelled fertilizer applied to plastic mulched maize (Zea mays L.). Three N split applications at the same rate of 225 kg N hm-2 were performed. The N was applied at the day before sowing, the eight-leaf stage (V8), and the silking stage (R1) in the following ratios: 100 %– 0–0 (N1), 40–60 %–0 (N2), and 40–30–30 % (N3). 15N-labelled urea (10.14 atom%) was used to trace the fate of each N application in the microplots. The results showed that grain yields increased by 8.3 and 10.7 % in the treatments N2 and N3, respectively, compared with the N1 treatment. Plant N uptakederived from fertilizer (Ndff, %) averaged 26.8–32.4 % compared with 67.6–73.2 % derived from soils (Ndfs, %). Split applications of N significantly increased the Ndff in plant. The residual 15N in the 0–200 cm soil layer ranged from 48.3 to 51.3 % at maize harvest, approximately half of which remained in 0–20 cm soil layer. The 15N recovery efficiency (15NRE) was 37.5 and 39.1 % for treatments N2 and N3, respectively, and was significantly higher than that for N1 treatment (27.9 %). The potential N losses in the treatments N2 and N3 were 11.2 and 12.7 %, respectively, and were significantly lower than losses in treatment N1 (22.2 %). In conclusion, applying N with two splits could produce higher grain yields, higher NRE, and lower N losses in semiarid plastic mulched maize cropping system.
收录类别	SCI
原文出处	derived from fertilizer (Ndff, %) averaged 26.8–32.4 % compared with 67.6–73.2 % derived from soils (Ndfs, %). Split applications of N significantly increased the Ndff in plant. The residual 15N in the 0–200 cm soil layer ranged from 48.3 to 51.3 % at maize harvest, approximately half of which remained in 0–20 cm soil layer. The 15N recovery efficiency (15NRE) was 37.5 and 39.1 % for treatments N2 and N3, respectively, and was significantly higher than that for N1 treatment (27.9 %). The potential N losses in the treatments N2 and N3 were 11.2 and 12.7 %, respectively, and were significantly lower than losses in treatment N1 (22.2 %). In conclusion, applying N with two splits could produce higher grain yields, higher NRE, and lower N losses in semiarid plastic mulched maize cropping system.
语种	英语
WOS记录号	WOS:000376295700004
内容类型	期刊论文
源URL	[http://ir.iswc.ac.cn/handle/361005/7761]
专题	水土保持研究所_水保所科研产出--SCI_2016--SCI
作者单位	1.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resource, Yangling 712100, China 2.College of Resources and Environmental Sciences, Northwest A&F University, Yangling 712100, China 3.Lab of Soil Microbiology and Nutrient Cycle, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China 4.University of Chinese Academy of Sciences, Beijing 100049, China
推荐引用方式 GB/T 7714	Shaojie Wang,Shasha Luo,Shanchao Yue,et al. Fate of 15N fertilizer under different nitrogen split applications to plastic mulched maize in semiarid farmland[J]. NUTRIENT CYCLING IN AGROECOSYSTEMS,2016(105):129-140.
APA	Shaojie Wang,Shasha Luo,Shanchao Yue,Yufang Shen,&Shiqing Li.(2016).Fate of 15N fertilizer under different nitrogen split applications to plastic mulched maize in semiarid farmland.NUTRIENT CYCLING IN AGROECOSYSTEMS(105),129-140.
MLA	Shaojie Wang,et al."Fate of 15N fertilizer under different nitrogen split applications to plastic mulched maize in semiarid farmland".NUTRIENT CYCLING IN AGROECOSYSTEMS .105(2016):129-140.