Sometimes happens it is necessary to determine the age of tree. If this plant was planted by you or someone from your relatives, then to tell how many it was years back, you will be able quite precisely. It is more difficult to be defined over the years the "unfamiliar" wood long-liver. There are several techniques for dating of age of trees. One of the most exact ways of definition is calculation of annual growth rings on trunk felling.
It is required to you
- - saw or Preszler's drill;
- - solutions for wood tincturing;
- - microscope or magnifying glass.
Instruction
1. Make saw cut, is whenever possible closer to the earth. For bigger convenience it is required to steam of circles. For broad-leaved breeds the saw cut can be made on slanting, width of rings so will increase. Well grind the place of saw cut. Consider by means of magnifying glass or binocular microscope annual growth rings. If it is all the same difficult to distinguish them, apply spirit solution of aniline or dichloride iron, blue or the diluted ink on wood.
2. If it is impossible to cut down tree, then use forest incremental drill of Preszler. In the right place take drill sample. Pull out the cylinder of wood and count annual growth rings on it, the same as on trunk felling. By means of this adaptation it is also possible to measure year layers easily.
3. For determination of age coniferous (pine, fir-tree, fir, cedar) there are no trees of need for above-mentioned two ways. The age of hvoynik can be learned, including verticils on trunk. Verticil is called the fanlike divergence of branches on trunkof tree. Count quantity of verticils. To the received value for pine add 3 years, for fir-tree – 4, for fir – 5, for cedar – 10. It is necessary to add these digits because the first verticil at different trees appears not in the first year of life. The received number will also be age of tree.
4. It is possible and to determine approximately the age of plant, knowing life expectancy of separate types. So, the aspen does not live more than 100 years, perishes in 80 from wood diseases more often. The oak is long-liver – on average grows up to 400-500 years. Yews live till 2000. The cypress can live also till 4000-5000. Sequoia – to 7000.