Effect of retention time in containerz on post-landscape planting tree height increase, xylem water potential, and visual root imprint rating of Acer.
Retention time (months) in containersz | Tree height increase | Ψ 5/19/10w (Mpa) 2011y,x (m) | Ψ 6/7/10w (Mpa) | Visual root imprint rating from 57 Ly,v container (1–5) | ||
---|---|---|---|---|---|---|
11 L | 57 L | 170 L | ||||
4 | 8 | 20 | 0.7 bu | −1.59 b | −1.50 ab | 2.9 b |
7 | 10 | 15 | 0.8 ab | −1.56 b | −1.45 b | 2.2 b |
9 | 12 | 11 | 1.1 a | −1.61 b | −1.45 b | 4.0 a |
12 | 14 | 6 | 0.7 b | −1.69 a | −1.58 a | 4.2 a |
↵z All trees were retained in three progressively larger containers (11, 57, and 170 L) for a total of 32 months with varying retention times in each.
↵y Tree attribute not affected for Magnolia and Ulmus (P > 0.07).
↵x Height increase 2011 growing season; height increase during 2010, 2012, and 2013 growing seasons not significant (P > 0.06).
↵w Ψ not significant October 2010, March and April 2011 (P > 0.08); Ulmus Ψ was not affected by retention time, and Magnolia was not measured.
↵v Imprint imposed on root system by roots deflecting at the 57 L nursery container wall; 1 = little imprint, 5 = highly visible imprint; imprint imposed by 11 L and 170 L containers not significant (P > 0.16).
↵u Means in a column with a different letter are statistically different at P < 0.05; n = 10, mean across root pruning treatment due to insignificant interaction (P > 0.41).