How to make a collection of specimens that reflect the life of a plant body

How to make plant three-dimensional specimensThe content of the first volume of junior high school biology requires students to learn to make plant leaf specimens by pressing method. Although the plant specimens made by this method can maintain the original form of the plant, they are often yellowish in color, wrinkled, and have poor three-dimensional effect, which is not easy to preserve. After many experiments, the author has explored a new method for making plant specimens-three-dimensional method.

The principle of three-dimensional production is to use silica gel to quickly dehydrate the plant, so as not to destroy the pigment structure of the plant, so as to maintain its natural color (take flowers as an example). Materials: Silicone, horse dung paper (or cardboard for packaging), compasses, scissors, tape, beakers, thermometers, drying ovens, flowers, insect needles (or fine wires), pliers, specimen bottles, plexiglass sheets (or foam boards), etc. The purchased silica gel is crushed, and the evenly sized particles are selected to be dried and stored in the bottle for later use to prevent moisture absorption.

2 Make the receptacle. Use a compass to draw a circle of the corresponding size on the horse dung paper according to the size of the flower, cut it from the edge to the center of the circle with scissors to remove a fan, enclose the remaining part into a cone, and the tip part is the place where the flower handle passes, and paste the seam with tape paper. 3 Collection and processing of specimens.

Select the required flowers and strong flower branches, cut into two sections, make it a flower and a branch with a flower stalk, insert the insect needle from the flower stalk ** into the flower stalk, and then pull out the needle tip part after inserting the lower branch, leaving a pinhole, which is convenient for connection when making, such as the flower branch is longer, it can be cut into several sections, and connected one by one after drying. 4 Fill in.

I don't ask for points. I don't have to look for it, I know. I am also the most professional, people say that the herbarium of the plant is a lifetime of specimens, the practice is from the seed - germ - emergence - various days - flowering - fruiting, etc., I am a specimen, I don't understand to ask me 287498455 do the task, do not ask for points, only for satisfaction.

Even if it's just a sixth-grade kid, you ask me, I ask who?

The experimental principle of herbarium making is written as: herbarium: color preservation, and integrity, preferably with roots, stems, leaves, flowers and fruits at the same time, the color is true.

The smallest area and the most complete part should be selected, that is, each part of the plant body with representative characteristics should be selected, and in general, in addition to picking branches and leaves, it is best to pick flowers or fruits. If the useful part is the root and the underground stem or bark, it must also be selected at the same time a little pressing.

Pick 2-more copies of each plant. To use pruning shears to take specimens, do not fold them by hand, because they are easy to hurt the tree and the pressed specimens are not beautiful. Different collection methods should be selected for different plant specimens.

Trimming: Select the most complete plant with each organ from several of the same plant as a specimen. Remove the residual leaves first, and appropriately thin some overly dense branches and overgrown flowers, leaves, and fruits. If 10 large flowers are gathered together, it is generally advisable to leave only 4 or 5 flowers, but a small section of flowers, fruits, and leaf stems should be left to indicate the original ecological situation.

If you want to make a three-dimensional object flat, you need to cut off 1 2 or 2 3 so that it does not pile up.

Before the absorbent paper, it must be shaped, that is, the branches, leaves, fruits, and flowers of the specimen must be placed flat to avoid overlapping. Try to keep the specimen in its natural state and look good. For some berries, tubers, and roots that are inconvenient to press, they should be soaked and preserved.

Place the treated plants in a specimen holder lined with absorbent paper, cover it with two to three layers of absorbent paper, and tie the specimen holder tightly while pressing a weight. Labeling: Dried plants are bound to make specimens.

1. Collect and sort

Before making a plant specimen, it is necessary to select the plants with the most complete organs in the same plant, and then cut the dry branches and leaves, the branches and leaves that are not growing well, and at the same time thin the flowers, leaves, fruits, and branches and leaves that are too cumbersome, and when pruning and arranging, the integrity of the specimen should be ensured.

2. Pressing and drying

First, the absorbent paper is spread on the specimen clip, and then the treated plants are neatly placed in the specimen clip, and two to three layers of absorbent paper are spread on top of it, so that other plants can be placed, and then the specimen clip is tied with a thick rope, and at the same time, the weight is pressed and placed in a well-ventilated place to dry.

3. Tag and save

Put the dried plants on the table paper, bind them up to make specimens, pay attention to the label record under the table paper, and then put the specimens in the specimen cabinet or specimen box in different categories, pay attention to the rainy and humid season, and ensure that the environment is ventilated and breathable.

Collecting plants: Look for a complete plant, and choose plants with complete roots, leaves, stems, flowers, and fruits as much as possible, so as to ensure the integrity of the specimen. Cleaning plants:

Removing plant sludge and dead leaves is conducive to maintaining the ornamental nature of plant specimens. Pressing the plant: Place a clean, dry piece of paper on the table, place the plant on the paper, cover it with paper, and pad it with a thick book.

Or sandwich the plant specimen in a thick book. Change the paper regularly: Change the absorbent paper every 2-3 days.

After about 10 days, the plant specimen is ready to be made. <

1. Collect plants: Find a complete plant, and choose plants with complete roots, leaves, stems, flowers and fruits as much as possible to ensure the integrity of the specimen.

2. Clean the plant sails and combustibles: remove the sludge and dead leaves of the plants, which is conducive to maintaining the ornamentality of plant specimens.

4. Regular paper change: replace the absorbent paper every 2-3 days. After about 10 days, the plant specimen is ready to be made.

1. The process of making plant specimens.

2. The method and process of herbarium.

4. How to make plant specimens?

1.Collecting plants: Collecting a whole plant, you can collect dwarf herbaceous plants, and you can't choose diseased and unhealthy plants.

2.Cleaning plants: Wash the sludge off and remove the dead leaves.

3.Pressed plants: Plants are placed in paper and the plant specimens are sandwiched in a thick book, or a thick book is placed on a paper pad.

4.Regular paper change: Regularly change the absorbent paper of the plant to dry the specimen.

5.Label recording: Hang the label and record the condition of the specimen.

There are five steps in the production of common plant specimens: collection, pressing, putting on paper, fixing and labeling; Secondly, we need some necessary tools: absorbent paper, specimen holders, collection bags, record books, newspapers, heavy books, etc.

1. Find a complete plant, preferably with rhizomes, leaves, flowers, fruits, and seeds at the same time.

2. The plant body should not exceed the size of A4.

3. Carefully dig down the plant body, carefully clean the sludge, remove the dead leaves, spread the plant on A4 paper, and cover another A4 paper.

4. Carefully move the specimen into the newspaper.

5. Nailed the openings in both places of the newspaper.

6. Mark the opening, label it, and place about ten pieces of old newspaper on the dry floor, which need to be folded neatly.

7. Newspapers with specimens should be placed on the newspaper pile, and the fold should be reversed to facilitate identification.

8. Put a few more newspapers and press them on the whole stack of specimens with wooden boards and heavy objects to help the specimens dry and shape.

9. On the first day, replace the absorbent newspaper between the specimens to dry the specimens, and the plant specimens will be finished after about ten days.

To collect and make plant specimens, you need to prepare a plant specimen clip and absorbent straw paper, the specimen clip can be made by yourself, make two mesh racks with wooden strips, leave a head that can be tied with a rope on the shelf, put water-absorbing straw paper between the two wooden frames, and tie it with a rope to carry it around.

The production process of plant specimens has four steps: trimming, pressing, putting on paper, and preservation, so let's take a look at it together.

Trimming:Choose a plant with the most complete organs, preferably rhizomes, leaves, flowers, fruits, and seeds at the same time, dig up the plant body, clean the sludge, and remove dead leaves and overly dense branches. The organs of the specimen are laid flat and cannot be folded, so that the specimen remains in its natural state.

Suppression:Place the sorted specimens on absorbent paper, flatten the front of the leaves and flowers upwards, and cover them with two to three layers of absorbent paper. The specimens are stacked layer by layer, the specimen clamps are tied tightly with thick rope, and then the weight is pressed and placed in a well-ventilated place to dry.

At regular intervals, replace the paper in the specimen holder with dry paper, and at the same time organize the specimen so that the water evaporates quickly, which can prevent discoloration or mold.

Paper:Place the dried specimen flat on the table paper, adjust the specimen arrangement, and then paste the specimen with a paper strip or transparent glue for fixation, and pay attention to the aesthetics of the specimen when fixing. Then paste a label record under the paper, which can indicate the name of the specimen, the collection location, the collection time, etc.

Save:Specimens should be placed in a ventilated and dry place to prevent mold. Note that in the rainy and humid season, the specimen storage environment should be kept ventilated.

The above is today's sharing, I hope it can help you.