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#1
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ulmus racemosa; seed and cuttings
Thank God for Newton Hills State Park in South Dakota for I was able to
get seeds of Rock Elm. This is becoming a rare tree. It may go extinct if we are not careful. I made some cuttings tonight and planted about 200 seeds. Has anyone had success with cuttings of elm species? Archimedes Plutonium www.iw.net/~a_plutonium whole entire Universe is just one big atom where dots of the electron-dot-cloud are galaxies |
#2
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ulmus racemosa; seed and cuttings
Now I am referencing Burns & Honkala, Silvics of North America Volume
2, Hardwoods, circa 1991 #654. On page 823 it states and I quote. --- quoting in parts page 823 --- Trees 20 years old produce viable seeds.... Despite its high seed viability, rock elm regenerates poorly.... persistence of dormant terminal buds...... Emergent seedlings rarely develop more than a single pair of leaves during the first growing season due to this dormancy. However under field conditions with competition....averaged only 27 cm (10.6 in) in height 5 years after planting and only 52 cm (20.4 in) 10 years after planting in northern Wisconsin. --- end quoting --- I was expecting a species that grows almost as fast as American elm. It seems not unreasonable to expect all species of elm to grow about the same rate. That the metabolism within a specific species should all be about the same. This is making me suspicious that most endangered species of trees are slow growing. That if a tree species is slow growing then its chances of going extinct are that much greater. This is bad news to me for I probably will not see my rock elm develop into a "stand of trees" before I die. Archimedes Plutonium www.iw.net/~a_plutonium whole entire Universe is just one big atom where dots of the electron-dot-cloud are galaxies |
#4
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light lamp to overcome dormancy and aid in cuttings ulmus racemosa; seed and cuttings
I am going to call it the Alaska effect. Since in Alaska summers can be
almost nearly 24 hours of sunlight. Maybe this is the answer for such slow growing trees such as Pinyon pine, Swiss stone pine and Korean pine. But most of all, perhaps this is the best method of cuttings, where placing them under a lightlamp for the nighttime increases the chances and rate of rooting. My Rock Elm seed of approx 150 were seeded last Friday and according to the book, can germinate in 6 days provided the seed was dry. Mine were not dry. I have 24 cuttings in addition to the 150 seeds, both begun last Friday 12May. So I want to monitor their progress. I find it hard to believe that since American Elm, White Elm grows fast that the entire genus, Ulmus, would all be fast growers or relatively fast growers. Willow genus is fast growing and as far as I know all Salix are fast growers. But the pine genus, Pinus has fast growers and slow ones such as Pinyon and the nut-pines. So I wonder about the metabolism determinants in the DNA coding as to fast growing compared to slow growing. Archimedes Plutonium www.iw.net/~a_plutonium whole entire Universe is just one big atom where dots of the electron-dot-cloud are galaxies |
#5
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light lamp to overcome dormancy and aid in cuttings ulmus racemosa; seed and cuttings
Now my Rock Elm seed were all green when I planted them last Friday and
7 days are near approaching for today is Monday and I do not expect any to germinate by Friday. I expect this because the book says they need to be dry. But I wonder why seeds need to be dry instead of green? Has anyone given a science explanation or is this merely someone's wishy washy attitude. I planted them green because I am under the suspicion of keeping the procedures as close to what Nature provides and Nature does not take time out and time off and dries the Rock Elm seed. Contrary to drying the seed before planting, I suspect that the green seed aids and facilitates germination in that some of the greenness goes towards the aid of germination. Has anyone really studied the science process of green to dry seed and whether it aids or hinders germination. Archimedes Plutonium www.iw.net/~a_plutonium whole entire Universe is just one big atom where dots of the electron-dot-cloud are galaxies |
#6
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light lamp to overcome dormancy and aid in cuttings ulmus racemosa; seed and cuttings
Of the 24 cuttings made last Friday, only 11 are not wilted and one
which is nearest to the lightlamp is sprouting a preexisting bud. I am hoping that elm is like willow cuttings that lose all their old leaves and sprout new leaves, along with, of course new roots formed. Taxus cuttings on the other hand kept all their old leaves when forming new roots. But maybe all the hardwoods lose their leaves. None of the 150 seeds have done anything, but this is just day 4 for them. I am beginning to think that the best way to tell apart species of elm is from their seed. It is easy to distinguish Rock Elm seed from the other elm species. In fact, on my trip to the Newton Hills State Park, I kept looking on the ground for fallen seeds to tell me if the tree was Rock Elm. The Rock Elm in Ponca State Park Nebraska looks like a American Elm in form and shape and has no corky branches, but the seed cases is distinguishable. I am resting most of my hopes on the seed and little if none on the cuttings. Archimedes Plutonium www.iw.net/~a_plutonium whole entire Universe is just one big atom where dots of the electron-dot-cloud are galaxies |
#7
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light lamp to overcome dormancy and aid in cuttings ulmus racemosa; seed and cuttings
wrote in message oups.com... ... But I wonder why seeds need to be dry instead of green? Has anyone given a science explanation or is this merely someone's wishy washy attitude. ... I don't know the answer for this species, but delayed germination can have a survival benefit for some species. Delays can get the seeds past difficult seasons or conditions and start the seedling growing at a more propitious time. Delays can also give seeds more chance to disperse, allowing the species to colonize a larger territory. Perhaps the drying out functions as a delay timer, or perhaps it signals to the seed that it is in sunlight, away from the shade of the parent tree or other plants. All just speculation on my part. Good luck with your seedlings. Alan |
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