Figure 7

Dynamics of winter wheat tills number (× 107 ha-1) at different growth stages in 2018–2019 (a), 2019–2020 (b) and 2020–2021 (c). W, S, J, A, B and M indicate the growth stages of wintering, standing, jointing, booting, anthesis, and maturity, respectively. Each value represents the mean ± SE (n = 3). Bars showing the same letter are not significantly different at P ≤ 0.05 as determined by the LSD test.