0soyoung
Imperial Masterpiece
I have just potted 16 Douglas fir (Pseudotsuga menziesii var. glauca) seedlings, to start my repotting-plus experiment (pretty much as I described in the “Let’s All Get Some Answers and Not Wait for the Book” thread):
[table="width: 500, class: grid"]
[tr]
[td]run[/td]
[td]repot[/td]
[td]rhizo[/td]
[td]cuts[/td]
[td]shoot pru[/td]
[td]defol[/td]
[/tr]
[tr]
[td]1[/td]
[td]-[/td]
[td]-[/td]
[td]-[/td]
[td]+[/td]
[td]+[/td]
[/tr]
[tr]
[td]2[/td]
[td]+[/td]
[td]-[/td]
[td]-[/td]
[td]-[/td]
[td]-[/td]
[/tr]
[tr]
[td]3[/td]
[td]-[/td]
[td]+[/td]
[td]-[/td]
[td]-[/td]
[td]+[/td]
[/tr]
[tr]
[td]4[/td]
[td]+[/td]
[td]+[/td]
[td]-[/td]
[td]+[/td]
[td]-[/td]
[/tr]
[tr]
[td]5[/td]
[td]-[/td]
[td]-[/td]
[td]+[/td]
[td]+[/td]
[td]-[/td]
[/tr]
[tr]
[td]6[/td]
[td]+[/td]
[td]-[/td]
[td]+[/td]
[td]-[/td]
[td]+[/td]
[/tr]
[tr]
[td]7[/td]
[td]-[/td]
[td]+[/td]
[td]+[/td]
[td]-[/td]
[td]-[/td]
[/tr]
[tr]
[td]8[/td]
[td]+[/td]
[td]+[/td]
[td]+[/td]
[td]+[/td]
[td]+[/td]
[/tr]
[tr]
[td]9[/td]
[td]-[/td]
[td]-[/td]
[td]-[/td]
[td]-[/td]
[td]+[/td]
[/tr]
[tr]
[td]10[/td]
[td]+[/td]
[td]-[/td]
[td]-[/td]
[td]+[/td]
[td]-[/td]
[/tr]
[tr]
[td]11[/td]
[td]-[/td]
[td]+[/td]
[td]-[/td]
[td]+[/td]
[td]+[/td]
[/tr]
[tr]
[td]12[/td]
[td]+[/td]
[td]+[/td]
[td]-[/td]
[td]-[/td]
[td]-[/td]
[/tr]
[tr]
[td]13[/td]
[td]-[/td]
[td]-[/td]
[td]+[/td]
[td]-[/td]
[td]-[/td]
[/tr]
[tr]
[td]14[/td]
[td]+[/td]
[td]-[/td]
[td]+[/td]
[td]+[/td]
[td]+[/td]
[/tr]
[tr]
[td]15[/td]
[td]-[/td]
[td]+[/td]
[td]+[/td]
[td]+[/td]
[td]-[/td]
[/tr]
[tr]
[td]16[/td]
[td]+[/td]
[td]+[/td]
[td]+[/td]
[td]-[/td]
[td]+[/td]
[/tr]
[/table]
o repot ‘+‘ = Aug/Sep
o repot ‘-‘ = spring
o rhizo ‘+‘ = nested clear orchid pot & proLeague
o rhizo ‘-‘ = MVP in black pot
o cuts ‘+’ = cuts at stem base done at repotting
o cuts ‘-‘ = do nothing
o shoot pru ‘+’ = nip shoot tip to just remove terminal leaves
o shoot pru ‘-‘ = do nothing
o defoliate ‘+’ = remove fraction of leaves by cutting through petiole
o defoliate ‘-‘ = do nothing
I am also trying to measure root growth, in addition to monitoring the ‘above ground’ growth. To facilitate measuring root growth, I am using 6 inch clear orchid pots (filled with dark colored Turface proLeague Heritage Red to contrast with growing roots) as a new experiment factor, ‘rhizo’. These ‘rhizotrons’ will be nested within a gallon size black plastic pot except when I periodically remove them to estimate the root growth. The other trees (not in clear orchid pots) are potted in one gallon black plastic pots filled with Turface MVP.
You may notice that originally I planned to have 2 trees per ‘run’ and use just the first 8 runs of the tabl above. This would have meant that any effect of shoot pruning on seasonal weight gain couldn’t be distinguished from the interaction (if any) of repotting time and the soil & pot size of the rhizotrons. If there turned out to be such an effect then I would have to execute the runs 9 -16 to find out whether the effect was due to shoot pruning or the interaction of rhizotrons and repotting time. Since I had 16 trees, I opted to just execute the full 16 run factorial experiment.
I cut off the ‘needles’ from one side of the central leader of those trees getting the defoliation treatment. The idea is to see if back budding preferentially occurs where needles are (ala mugo pines) or where they are not (ala JBP). I left any existing buds untouched.
Lastly, I gave each 1 teaspoon of Osmocote 14-14-14.
[table="width: 500, class: grid"]
[tr]
[td]id[/td]
[td]base dia (mm)[/td]
[td]defol[/td]
[td]cuts[/td]
[td]wt (gm)[/td]
[td]clr pot[/td]
[/tr]
[tr]
[td]1[/td]
[td]4.55[/td]
[td]yes[/td]
[td]no[/td]
[td]10[/td]
[td]no[/td]
[/tr]
[tr]
[td]2[/td]
[td]5.12[/td]
[td]no[/td]
[td]no[/td]
[td]15[/td]
[td]no[/td]
[/tr]
[tr]
[td]3[/td]
[td]4.75[/td]
[td]yes[/td]
[td]no[/td]
[td]12[/td]
[td]yes[/td]
[/tr]
[tr]
[td]4[/td]
[td]4.2[/td]
[td]no[/td]
[td]no[/td]
[td]13[/td]
[td]yes[/td]
[/tr]
[tr]
[td]5[/td]
[td]6.3[/td]
[td]no[/td]
[td]yes[/td]
[td]22[/td]
[td]no[/td]
[/tr]
[tr]
[td]6[/td]
[td]7.48[/td]
[td]yes[/td]
[td]no[/td]
[td]22[/td]
[td]no[/td]
[/tr]
[tr]
[td]7[/td]
[td]5.28[/td]
[td]no[/td]
[td]yes[/td]
[td]15[/td]
[td]yes[/td]
[/tr]
[tr]
[td]8[/td]
[td]5.08[/td]
[td]yes[/td]
[td]no[/td]
[td]14[/td]
[td]yes[/td]
[/tr]
[tr]
[td]9[/td]
[td]6.67[/td]
[td]yes[/td]
[td]no[/td]
[td]31[/td]
[td]no[/td]
[/tr]
[tr]
[td]10[/td]
[td]5.77[/td]
[td]no[/td]
[td]no[/td]
[td]17[/td]
[td]no[/td]
[/tr]
[tr]
[td]11[/td]
[td]5.56[/td]
[td]yes[/td]
[td]no[/td]
[td]20[/td]
[td]yes[/td]
[/tr]
[tr]
[td]12[/td]
[td]5.03[/td]
[td]no[/td]
[td]no[/td]
[td]12[/td]
[td]yes[/td]
[/tr]
[tr]
[td]13[/td]
[td]4.55[/td]
[td]no[/td]
[td]yes[/td]
[td]9[/td]
[td]no[/td]
[/tr]
[tr]
[td]14[/td]
[td]4.7[/td]
[td]yes[/td]
[td]no[/td]
[td]13[/td]
[td]no[/td]
[/tr]
[tr]
[td]15[/td]
[td]6.53[/td]
[td]no[/td]
[td]yes[/td]
[td]21[/td]
[td]yes[/td]
[/tr]
[tr]
[td]16[/td]
[td]6.3[/td]
[td]yes[/td]
[td]no[/td]
[td]12[/td]
[td]yes[/td]
[/tr]
[/table]
[table="width: 500, class: grid"]
[tr]
[td]run[/td]
[td]repot[/td]
[td]rhizo[/td]
[td]cuts[/td]
[td]shoot pru[/td]
[td]defol[/td]
[/tr]
[tr]
[td]1[/td]
[td]-[/td]
[td]-[/td]
[td]-[/td]
[td]+[/td]
[td]+[/td]
[/tr]
[tr]
[td]2[/td]
[td]+[/td]
[td]-[/td]
[td]-[/td]
[td]-[/td]
[td]-[/td]
[/tr]
[tr]
[td]3[/td]
[td]-[/td]
[td]+[/td]
[td]-[/td]
[td]-[/td]
[td]+[/td]
[/tr]
[tr]
[td]4[/td]
[td]+[/td]
[td]+[/td]
[td]-[/td]
[td]+[/td]
[td]-[/td]
[/tr]
[tr]
[td]5[/td]
[td]-[/td]
[td]-[/td]
[td]+[/td]
[td]+[/td]
[td]-[/td]
[/tr]
[tr]
[td]6[/td]
[td]+[/td]
[td]-[/td]
[td]+[/td]
[td]-[/td]
[td]+[/td]
[/tr]
[tr]
[td]7[/td]
[td]-[/td]
[td]+[/td]
[td]+[/td]
[td]-[/td]
[td]-[/td]
[/tr]
[tr]
[td]8[/td]
[td]+[/td]
[td]+[/td]
[td]+[/td]
[td]+[/td]
[td]+[/td]
[/tr]
[tr]
[td]9[/td]
[td]-[/td]
[td]-[/td]
[td]-[/td]
[td]-[/td]
[td]+[/td]
[/tr]
[tr]
[td]10[/td]
[td]+[/td]
[td]-[/td]
[td]-[/td]
[td]+[/td]
[td]-[/td]
[/tr]
[tr]
[td]11[/td]
[td]-[/td]
[td]+[/td]
[td]-[/td]
[td]+[/td]
[td]+[/td]
[/tr]
[tr]
[td]12[/td]
[td]+[/td]
[td]+[/td]
[td]-[/td]
[td]-[/td]
[td]-[/td]
[/tr]
[tr]
[td]13[/td]
[td]-[/td]
[td]-[/td]
[td]+[/td]
[td]-[/td]
[td]-[/td]
[/tr]
[tr]
[td]14[/td]
[td]+[/td]
[td]-[/td]
[td]+[/td]
[td]+[/td]
[td]+[/td]
[/tr]
[tr]
[td]15[/td]
[td]-[/td]
[td]+[/td]
[td]+[/td]
[td]+[/td]
[td]-[/td]
[/tr]
[tr]
[td]16[/td]
[td]+[/td]
[td]+[/td]
[td]+[/td]
[td]-[/td]
[td]+[/td]
[/tr]
[/table]
o repot ‘+‘ = Aug/Sep
o repot ‘-‘ = spring
o rhizo ‘+‘ = nested clear orchid pot & proLeague
o rhizo ‘-‘ = MVP in black pot
o cuts ‘+’ = cuts at stem base done at repotting
o cuts ‘-‘ = do nothing
o shoot pru ‘+’ = nip shoot tip to just remove terminal leaves
o shoot pru ‘-‘ = do nothing
o defoliate ‘+’ = remove fraction of leaves by cutting through petiole
o defoliate ‘-‘ = do nothing
I am also trying to measure root growth, in addition to monitoring the ‘above ground’ growth. To facilitate measuring root growth, I am using 6 inch clear orchid pots (filled with dark colored Turface proLeague Heritage Red to contrast with growing roots) as a new experiment factor, ‘rhizo’. These ‘rhizotrons’ will be nested within a gallon size black plastic pot except when I periodically remove them to estimate the root growth. The other trees (not in clear orchid pots) are potted in one gallon black plastic pots filled with Turface MVP.
You may notice that originally I planned to have 2 trees per ‘run’ and use just the first 8 runs of the tabl above. This would have meant that any effect of shoot pruning on seasonal weight gain couldn’t be distinguished from the interaction (if any) of repotting time and the soil & pot size of the rhizotrons. If there turned out to be such an effect then I would have to execute the runs 9 -16 to find out whether the effect was due to shoot pruning or the interaction of rhizotrons and repotting time. Since I had 16 trees, I opted to just execute the full 16 run factorial experiment.
I cut off the ‘needles’ from one side of the central leader of those trees getting the defoliation treatment. The idea is to see if back budding preferentially occurs where needles are (ala mugo pines) or where they are not (ala JBP). I left any existing buds untouched.
Lastly, I gave each 1 teaspoon of Osmocote 14-14-14.
[table="width: 500, class: grid"]
[tr]
[td]id[/td]
[td]base dia (mm)[/td]
[td]defol[/td]
[td]cuts[/td]
[td]wt (gm)[/td]
[td]clr pot[/td]
[/tr]
[tr]
[td]1[/td]
[td]4.55[/td]
[td]yes[/td]
[td]no[/td]
[td]10[/td]
[td]no[/td]
[/tr]
[tr]
[td]2[/td]
[td]5.12[/td]
[td]no[/td]
[td]no[/td]
[td]15[/td]
[td]no[/td]
[/tr]
[tr]
[td]3[/td]
[td]4.75[/td]
[td]yes[/td]
[td]no[/td]
[td]12[/td]
[td]yes[/td]
[/tr]
[tr]
[td]4[/td]
[td]4.2[/td]
[td]no[/td]
[td]no[/td]
[td]13[/td]
[td]yes[/td]
[/tr]
[tr]
[td]5[/td]
[td]6.3[/td]
[td]no[/td]
[td]yes[/td]
[td]22[/td]
[td]no[/td]
[/tr]
[tr]
[td]6[/td]
[td]7.48[/td]
[td]yes[/td]
[td]no[/td]
[td]22[/td]
[td]no[/td]
[/tr]
[tr]
[td]7[/td]
[td]5.28[/td]
[td]no[/td]
[td]yes[/td]
[td]15[/td]
[td]yes[/td]
[/tr]
[tr]
[td]8[/td]
[td]5.08[/td]
[td]yes[/td]
[td]no[/td]
[td]14[/td]
[td]yes[/td]
[/tr]
[tr]
[td]9[/td]
[td]6.67[/td]
[td]yes[/td]
[td]no[/td]
[td]31[/td]
[td]no[/td]
[/tr]
[tr]
[td]10[/td]
[td]5.77[/td]
[td]no[/td]
[td]no[/td]
[td]17[/td]
[td]no[/td]
[/tr]
[tr]
[td]11[/td]
[td]5.56[/td]
[td]yes[/td]
[td]no[/td]
[td]20[/td]
[td]yes[/td]
[/tr]
[tr]
[td]12[/td]
[td]5.03[/td]
[td]no[/td]
[td]no[/td]
[td]12[/td]
[td]yes[/td]
[/tr]
[tr]
[td]13[/td]
[td]4.55[/td]
[td]no[/td]
[td]yes[/td]
[td]9[/td]
[td]no[/td]
[/tr]
[tr]
[td]14[/td]
[td]4.7[/td]
[td]yes[/td]
[td]no[/td]
[td]13[/td]
[td]no[/td]
[/tr]
[tr]
[td]15[/td]
[td]6.53[/td]
[td]no[/td]
[td]yes[/td]
[td]21[/td]
[td]yes[/td]
[/tr]
[tr]
[td]16[/td]
[td]6.3[/td]
[td]yes[/td]
[td]no[/td]
[td]12[/td]
[td]yes[/td]
[/tr]
[/table]