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. 2020 Feb 28;11:188. doi: 10.3389/fpls.2020.00188

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Copyright © 2020 Liu, Zhang, Liu, Chen and Zou

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Effects of Zn application rate on shoot biomass at the V6, V12, VT, R3, and R6 stages of maize (A) and correlations of the 1,000-kernel weight of apical (B), middle (C), and basal (D) sections of maize spikes with shoot biomass at maturity. Shoot biomass refers to the aboveground biomass, which includes stem, leave, and cob after tasseling (VT) stage. Values are the average ± SE of four replicates. ***P < 0.001, **P < 0.01, and *P < 0.05. ns, not significant..