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Table 4 Plant number per unit area (1 m × 1 m) across different densities during the second year (Mean ± SE)

From: The significance of biomass allocation to population growth of the invasive species Ambrosia artemisiifolia and Ambrosia trifida with different densities

Growth stages

A. artemisiifolia

A. trifida

Low-density

High-density

Low-density

High-density

SS

141 ± 5.3Ba

434 ± 10.5Aa

258 ± 4.8Ba

512 ± 11.5Aa

VS

59 ± 3.1Bb

101 ± 5.2Ab

113 ± 2.8Bb

435 ± 6.2Ab

BS

43 ± 1.3Bc

62 ± 2.6Ac

76 ± 1.4Bc

103 ± 1.1Ac

MS

34 ± 1.6Bc

45 ± 1.4Ad

26 ± 0.7Bc

38 ± 1.1Ad

  1. Different uppercase letters indicate significant differences in plant number between high and low densities at the same growth stage (P < 0.05), while different lowercase letters indicate significant differences in plant number across different growth stages at the same density (P < 0.05)