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. 2020 Jun 19;20:282. doi: 10.1186/s12870-020-02477-2

Fig. 7.

Fig. 7

Nitrogen translocation efficiency in different maize organs (leaf, stem and cob) from silking to physiological maturity as affected by mulching (no mulch, plastic mulch), planting density (55,000 seeds ha− 1, 90,000 seeds ha− 1), and N fertilizer application rate (N0, 0 kg N ha− 1; N120, 120 kg N ha− 1; N240, 240 kg N ha− 1; N360, 360 kg N ha− 1) in 2015 (a, b), 2016 (c, d), and 2017 (e, f). Bars represent the mean + one standard error of the mean (n = 4)