图2. 羊草叶宽的差异及变化趋势(平均值±标准误)。ALW, 展开叶宽; AMN, 展自叶差; LW, 叶宽; NLW, 自然叶宽。y, 二次曲线拟合方程(对照, CK): y₁, 展开叶宽; y₂, 展自叶差; y₃, 自然叶宽。Y, 二次曲线拟合方程(切根, CR): Y₁, 展开叶宽; Y₂, 展自叶差; Y₃, 自然叶宽。*表示在0.05水平上差异显著(双尾检测)。

Fig. 2. Dynamics of leaf width of Leymus chinensis (mean ± SE). ALW, spread leaf width; AMN, difference between spread leaf width and natural leaf width; LW, leaf width. NLW, natural leaf width. y, the quadratic curve fitting equation for control (CK): y₁, spread leaf width; y₂, difference between spread leaf width and natural leaf width; y₃, natural leaf width. Y, the quadratic curve fitting equation for root-cutting (CR): Y₁, spread leaf width; Y₂, difference between spread leaf width and natural leaf width; Y₃, natural leaf width. * indicate differences at the 0.05 level.