How to know the age of the jujube tree, don t cut the tree to see the annual rings. Because I want t

Knowing the age of a jujube tree without cutting it down can be judged by looking at characteristics such as trunk diameter, crown diameter, and bark texture. Here are some ways to do it:

1.Observe the diameter of the trunk: Measure the diameter of the trunk and calculate the number of rings.

Each ring represents the growth of the year, so the age of the tree can be determined by counting the number of rings. However, this method requires the bark to be peeled off, which can cause harm to the tree, so use it with caution.

2.Observe the canopy diameter: Measure the diameter of the canopy and judge the age based on the growth of the canopy.

In general, young canopies are narrower and gradually expand as they age. However, this method requires a relatively large canopy to accurately estimate the age.

3.Observe the bark lines: There are many lines on the bark of the date tree, and these lines can provide information about age.

In general, the bark of young trees is smoother, and as they age, the bark becomes rougher. However, this method requires careful observation to get accurate results.

Please note that these methods require a certain amount of experience and skill to get accurate results. If you're not sure how to use these methods, it's advisable to ask a professional to help you estimate the age of your tree.

You can only calculate the approximate age of the tree, and first calculate the diameter at breast height. Basically, jujube trees are 1 mm long a year within 100 years old, and 1 mm long every year for more than 100 years. In other words, jujube trees within 100 years are basically 10 years in diameter at breast height and 1 mile long.

If you are about the same thickness, find a tree stump in the same rainwater distribution area and count it, and you should be able to make an appointment.

Four or five years old is good to measure, and it is difficult to say how old the tree is!

Thrush parents want the new birds to be younger and easier to train, so how to judge the age of the birds, the following three methods will help you judge the age of the birds.

According to the experience of some bird watching enthusiasts, it can be observed and analyzed from the feathers and legs of birds. In general, the younger the bird (except for juvenile juveniles), the shiny and bright the feathers on the body. As we age, especially in old age, the feathers gradually lose their luster and appear messy and rough.

On the other hand, the skin on the toes of the legs of the new bird is relatively delicate, and there is no fish scale skin after 1-2 moults, and then with age, the fish scale skin on the legs becomes more and more obvious, and the cortex is getting thicker and thicker.

Generally speaking, young birds, their legs, toes, and claws are brown, shiny and reddish, and with age, the brownish color will gradually degrade and gradually turn to light white. To be sure, the scales on the legs, toes, and claws that are obvious and rough must be the older birds.

1. It is more complicated to calculate the age of ancient trees, and it is necessary to use the method of carbon 14 cross positioning to calculate: first use professional instruments to sample on ancient trees to calculate the approximate age of ancient trees (due to the large time error measured in this way, it is also necessary to use some auxiliary means to sample and analyze some trees of the same category that are recorded in writing and accurate in age, including the environment in which the trees grow, the soil, the precipitation in the area, etc.), on this basis, a certain formula is compiled, Based on the cross-reference of the results of the carbon-14 analysis, the age of the ancient tree was finally calculated. 2 Easiest Ways:

Measuring the age of a tree with annual rings is one way, but one way to do it is not to know how many years the tree has been cut down, and one of the usual ways is to look at its branches and look down from above. The annual branches are two-year-old, and the three-year-old branches are derived from this, from which the age of the main branch is calculated. From this, the approximate age of the tree is deduced.

3. At present, there are three methods for determining ancient trees in the world, one is to drill holes in the trunk and determine the age of the tree according to the growth rings; The second is CT scanning, but CT is a kind of radiation, which has an impact on trees, and the equipment is expensive, and the measurement cost is high; The third is the carbon-14 method, which is commonly used in archaeology, which also requires holes in trees and has an error of more than 20 years.

The methods are:

1. The height and trunk of the tree depend on experience.

2. How many branches are forked, and small trees are generally divided once a year.

3. Look at the number of scars on the tree.

4. Count the annual rings of the tree.

Arbors are generally referred to as trees, with distinctly erect trunks, and the plants are generally tall and have branches that are high above the ground, allowing them to form a canopy.

The most beautiful tree in the world:

10. Black pine.

It is not always accurate to rely on the growth rings, and it is not possible to cut down a tree in order to know the age, and there are generally the following without destroying the tree itself.

1 Empirically.

2 Ask some of the older people who live nearby.

3 According to the surrounding buildings or materials.

4 Isotope determination.

Generally, there are the following types without damaging the tree itself.

1. The height and trunk of the tree depend on experience.

2. How many branches are forked, and small trees are generally divided once a year.

3. Look at the number of scars on the tree.

4 In addition to knowledge, it is also necessary to rely on experience, and if you want to know how old a tree is, tell me a good way to count the rings of the tree.

So, what are the tree rings:

You must have seen a large sawn tree, with a ring that expands outwards from the center to the edge of the tree on the cross-section against the ground. Every year that a tree grows, it forms a ring, which is the tree's growth rings. Count the rings to see how old they are.

However, not all trees have growth rings. Some trees, like citrus trees, cannot be counted this way.

Tree rings record the traces of nature's ever-changing nature, and are an extremely valuable scientific material. It contains a wealth of historical information about climate, astronomy, medicine, and the environment. For example:

In the investigation of forest resources, according to the width of the annual rings to understand the growth of forest trees in the past few years, the future growth dynamics, for the formulation of forestry planning, the determination of reasonable felling and the adoption of different management measures to provide a scientific basis; Meteorologists understand the climate conditions of each year through the width of the tree's rings: the width of the rings indicates that the year has sufficient sunshine and good wind and rain; If the rings are narrow, it means that the temperature is low, the rainfall is low, and the climate is harsh. If the climate of a certain place has a certain periodicity, it will also be reflected in the corresponding periodic changes in the width and narrowness of the tree rings.

Length and width, roughness of ** hehe.

You can cut down the tree and see how many loops the tree has.

1. Soil method:

To know the age of a growing tree, a 5-10 cm long and centimeter-diameter sample is usually drilled on the trunk with a sample volume of cubic centimeters, embedded in a suitable wooden trough, flattened and observed with a magnifying glass.

The age of the tree is calculated and confirmed according to the method of directly counting the growth rings given in the "Dendrology". After sampling, the tree holes need to be disinfected and then filled with glass glue to ensure the normal growth of the trees.

2. New measures:

Scientists have previously discovered that the average fish can tell age by the growth rings on the middle canalith in the inner ear, sharks by the ring growth rings on the spine, and shellfish by the growth rings on the shell.

Those who said that they relied on the annual rings stepped on it.

I listened to the teacher to see the annual rings, that is, after the tree is cut down, there is no circle and circle, and there are as many circles as there are years

If you judge it from something else, I think it depends on experience! Or like the 2nd floor

If you can: look at the growth rings. You can also judge by the shape of the tree!

The height, trunk thickness, and roots of the tree, if they are cut off, look at the growth rings.

1. It is more complicated to calculate the age of ancient trees, and it is necessary to use the method of carbon 14 cross positioning to calculate: first use professional instruments to sample on ancient trees to calculate the approximate age of ancient trees (due to the large time error measured in this way, it is also necessary to use some auxiliary means to sample and analyze some trees of the same category that are recorded in writing and accurate in age, including the environment in which the trees grow, the soil, the precipitation in the area, etc.), on this basis, a certain formula is compiled, Based on the cross-reference of the results of the carbon-14 analysis, the age of the ancient tree was finally calculated.

2 The easiest way: using annual rings to measure the age of the tree is a method, but you can't want to know how many years the tree will cut it, a common method is to look at its branches, from top to bottom. The annual branches are two-year-old, and the three-year-old branches are derived from this, from which the age of the main branch is calculated.

From this, the approximate age of the tree is deduced.

3. At present, there are three methods for determining ancient trees in the world, one is to drill holes in the trunk and determine the age of the tree according to the growth rings;

The second is CT scanning, but CT is a kind of radiation, which has an impact on trees, and the equipment is expensive, and the measurement cost is high;

The third is the carbon-14 method, which is commonly used in archaeology, which also requires holes in trees and has an error of more than 20 years.

Generally documented! If not......

Then do you have an impression of high school physics - the problem of the half-life of the element ......It's the carbon-14 method they talked about upstairs.

It is also necessary to refer to the literature ...... that we estimate the approximate ageto determine ...... specificallySome of the trees in the park are marked with an integer, which is just an approximate ......Yes, okay......

Look at the growth rings, or look at the thickness of the roots.

The annual rings, a little more advanced, seem to use carbon-14, more accurate.

You have to use C14 to measure a tree!

Use a cylinder to make an eye on the trunk of the tree, take out the wooden strip in the cylinder, and count how many layers there are.

Count the annual rings on the branches of trees.

growth rings, or by C14 determination.

The easiest way: Measuring the age of a tree with tree rings is one way, but you can't know how many years the tree has been cut down, a common way is to look at its branches and look down from above. The annual branches are two-year-old, and the three-year-old branches are derived from this, from which the age of the main branch is calculated.

From this, the approximate age of the tree is deduced.

1.Years of rings. This is the most well-known method, but it only works for felled trees. In error, because the annual rings have false annual rings.

2.Drill several growth rings. Like drilling cores for geological prospecting.

3.Count the number of layers of side branches. Generally, conifers produce one round of side branches every year, and count the number of layers of its side branches to know its age. This is valid within a certain age range, 30 years for plantations and 50 years for wild forests, and it is not accurate to be older.

4.Measure age. The age of a tree is calculated based on the annual growth data of the species, i.e., how much the trunk thickens each year. Obviously, there will be errors.

5.Check the file. Consult the tree planting files of the forestry or garden department to determine the age of the trees. For plantations to be effective, it is difficult for us to know when a wild tree grows.

6.Visual. Judge the age of the tree empirically. Obviously, the error is large.

7.Carbon-14 determination. Samples were taken from the trees and carbon-14 measurements were done to determine the age of the trees. The error is also more than 20 years.

Scan. The equipment is expensive and inconvenient to operate.

The so-called age of trees we see includes real age, measured age, and legendary age. So, you don't have to take it all seriously.

One of the most common ways to do this is to look at its branches, from above. The annual branches are two-year-old, and the three-year-old branches are derived from this, from which the age of the main branch is calculated. From this, the approximate age of the tree is deduced.

Look at the tree's rings, which is to sleep in the middle of the circle, and one circle represents the year.

Some people say it's the rings of a tree, but I don't believe it.

The big tree cut down several stumps and it was a year old.