This entry was posted in Uncategorized on Apby mel5413.Artificial forest regeneration using nursery produced growing stock is commonplace in the Pacific Northwest. “Douglas-Fir – National Wildlife Federation.” Douglas-Fir. Northeastern Area State and Private Forestry, n.d. “Pseudotsuga Menzieslif(Mirb.” Pseudotsuga Menzieslif(Mirb. “How to Germinate Douglas Fir Seeds.” Home Guides. Visit the links below to learn more about the Douglas-fir.ĭeziel, Chris. Seed propagation is both easy and inexpensive to perform as is indicated in the last section. For propagation of this magnificent tree, the most popular form is by seed and this is done in the home as well as in commercial settings. Since its first use as timber for Native American houses to its current use as furniture and holiday decorations, the Douglas-fir has been very influential in our everyday lives. The Douglas-fir tree is a very important tree both ecologically and economically in America. After seedlings start to grow, thin them out so that there is only one seedling per container.If needed apply fertilizer that has a low nitrogen content. Keep the pots in an area that is around 70 degrees F and keep the soil moist.Drop the seed into a hole that is about 2-3 inches deep and cover with soil.Wash small pots and fill them at least 6 inches deep with coarse potting soil.This is called stratification and it usually results in a higher percentage of germination. Refrigerate seeds for around 30 days in order to create a sense of dormancy.Place the seeds inside a moist paper towel inside a plastic bag.After soaking, place the seeds on a paper towel and allow them to dry for another 24 hrs.This is called scarification and it allows the hard seed shell to be penetrated by Place the seeds in a bowl of water and let them soak for 24 hrs.Remove the wings from the seeds by gently rubbing the seeds in between your fingers.Collect a cone from a Douglas-fir tree with desirable characteristics such as shape.Tissue Culture is rarely used because of how expensive it is and hardwood such as Douglas-fir is going to take a while to culture. Grafting is not often used because retailers often do not find it necessary and it takes a lot of time and manual labor. Some less popular forms of propagation are grafting and tissue culture. However, the success of the cuttings rooting is very slim and it can often be expensive because you have to buy rooting hormones. Cuttings is a good form of propagation in that it takes less time for the tree to grow and you can also choose cuttings based on favorable characteristics. Rooting cuttings is also a very popular form of propagation used in commercial settings. However, it can often take awhile for the trees to grow into adults and you also run the risk of high genetic variation. Seed propagation is mostly used because of the success rate of seed germination and it is a less expensive method. These great trees were used by the Native Americans to build homes, baskets, and they were also used for medicinal purposes. The Douglas-firs are not only known for their use as timber, but also for their historical value. The Douglas-fir is an amazing tree for many reasons, one being that they are often 500 years old and sometimes can reach over 1000 years old! When the Douglas-fir grows in dense areas they self-prune their lower branches and so their conical crown starts high above the ground. The Rocky Mountain Douglas-fir only reaches about 160 feet in length. They grow up to 250 feet and the old-growth forests can reach 5-6 feet in diameter. Coastal Douglas-fir grow faster and larger of the two varieties (the Coastal Douglas-fir and the Rocky Mountain Douglas-fir). The Rocky Mountain Douglas-fir grows best in soils in areas with gravely, acidic soils. They grow best in the northern coastal belt of California, Oregon, and Washington whose soils mainly originated from sandstones and shales. The variety menziesii grow best in well-aerated soils that go deep. They can grow in a variety of climatic conditions but they grow best in mild, wet winters and cool, dry summers with small fluctuations in temperature. These trees are evergreen trees and keep their needles all year around. In fact the scientific name Pseudotsuga means “false hemlock”. The Douglas-fir is a little bit of a mystery because it is not a true fir, or spruce, or pine. Of the world’s most valuable timber trees and is extremely important economically.
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