W.D. Johnstone (emeritus scientist) F. J. van Thienen (retired) Presented by G. Harper (Research Scientist, FPIB, MoFML) 1

EP What is the optimum pine management regime? - Species espacement (planting density) trial : - 26 installations - (Pl, Sx/Sw, Lw, Fdi) - 500, 1000, 1500, 2000, 2500 sph trees /plot x 3 reps / site (CRBD) 2

Treatment number Treatment (trees/ha) Intertree distance (m) Plot size (ha)

Lodgepole pine 12 sites total Only years old ( ) Example: 20 years after establishment at Crow Creek –

EP – Lodgepole pine Crow Creek - Nadina Forest District  SBS mc2 / 01 (Sx, Pl, Bl)  970 m elevation  Lodgepole pine planted 1987  Fill planted mortality (88-91)  Brushed & ingress removed 1997  5-20 year data (1992, 1997, 2001, 2006) Johnstone and van Thienen (2011, in press) 5

EP – Lodgepole pine - diameter growth Johnstone and van Thienen (2011, in press) 6

EP – Lodgepole pine - height growth 500 tph Johnstone and van Thienen (2011, in press) 7

EP – Lodgepole pine Individual tree total volume Stand total volume Johnstone and van Thienen (2011, in press) 8

EP – Lodgepole pine Installation # 6 (Nadina) Effects of espacement after 20 years: No effect on height, periodic height growth, % survival Significant effect on all other tree and per hectare values Crown size DBH Volume (tree & stand) 9

EP – Lodgepole pine 20 year Response Summary from 5 installations - the (%) difference between overall mean and treatment mean. Installation #DistrictBEC data - years post treatment 2NadinaSBSmc220 6NadinaSBSmc220 7Williams LakeSBSdw220 9Rocky MountainMS20 11Rocky MountainMS20 10

Lodgepole pine 1500 tph 11 EP Williams Lake 2001 SBSdw2 EP Nadina 2003 SBSmc2 EP Rocky Mountain 2004 MS

EP 964 – Lodgepole pine 20 year Response - 5 sites combined - the (%) difference from the overall mean. 12

EP 964 – Lodgepole pine 20 year Response - 5 sites combined - the (%) difference from the overall mean. 13

EP 964 – Lodgepole pine 20 year Response - 5 sites combined - the (%) difference from the overall mean. 14

EP 964 – Lodgepole Pine 20 year Response - 5 sites combined 15

EP 964 – Interior Spruce 16

17 EP MPB damage