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. 2018 Sep 25;8:14319. doi: 10.1038/s41598-018-32749-9

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© The Author(s) 2018

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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The N accumulation, N translocation and N translocation efficiency in different organs at the silking and physiological maturity stages were affected by plastic mulching and the N fertilizer application rate in 2015. NM: no-mulch treatment; M: plastic mulch treatment; SS: silking stage; PMS: physiological maturity stage. The bars are the mean + one standard error of the mean (n = 4). Different lowercase letters indicate significant differences among the N fertilizer rates (p < 0.05), and capital letters indicate significant differences among the effects of the N fertilizer rates on total N accumulation, N translocation and N translocation efficiency (p < 0.01).