The reason of plant encyclopedic knowledge
Can Venus flytrap really eat insects?
Yes, because of the lack of some nutrients, the leaves of venus flytrap gradually change, and the demand for nutrients is met by catching and digesting insects. Not all these insect-eating plants feed on insects. But insects will grow stronger after eating them.
Can castor seeds be eaten?
I can't. Because castor seeds are very toxic, people will be poisoned if they eat them. Although you can't eat it, it is very useful. It can be made into castor oil to be used on airplanes, and it can also be used to detoxify and treat people as medicine.
Why do rice seeds hatch?
Before sowing, rice should hatch into neat and delicate white buds at home. One is to catch up with the season; Second, it is easy to take care of; The third is to avoid bird pecking and wind and rain. Wind and rain will make seeds move and distribute unevenly. Seeds with well-hatched buds take root faster, and will not move despite the wind and rain.
Why do rice seedlings rot in rice seedling fields?
After sowing, the weather is hot and cold, and suddenly it is attacked by cold wave or frost, and the buds will freeze to death if they can't stand it. If the paddy field is uneven, there will be more water in the low-lying areas, or the seeds or seedlings will die because of lack of oxygen in cold water. The manure or manure in the seedling field does not decompose, but continues to ferment, releasing harmful gases, causing the young roots to turn black and die. Rice seeds carry germs, or there are germs in the seedling field, which will make the seedlings sick and die. Weeds such as moss grow in the seedling field, and competing with seedlings for territory will also cause rotten seedlings. Birds peck at rice seeds, and pests gnaw at seedlings, resulting in rotten seedlings.
Encyclopedia of plants
What's the use of cocoa trees?
The seed of cocoa tree is the main raw material for making chocolate. Chocolate is made of cocoa powder, and some sand grains, spices and nuts are added.
Why do vegetables taste better after the first frost?
Frosted vegetables will convert starch into sugar in order to resist the cold, so the taste will change.
Why can't people who are allergic to paint eat mangoes?
Mango belongs to the Rhus family, and contains monohydroxy benzene or dihydroxy benzene, which is similar to the ingredients usually contained in paint. It has a great stimulating effect on skin and mucosa, and it is particularly easy to cause allergies.
What flowers and plants have good mosquito repellent effect?
Geranium can emit fresh and elegant lemon fragrance, which has a good mosquito repellent effect indoors. The higher the temperature, the better the mosquito repellent effect. Mosquito repellent plants include pyrethrum, Qilixiang, Cordyceps, Drosophila melanogaster, Zanthoxylum bungeanum, eucalyptus citriodora, mint, lavender, Artemisia argyi, cordate telosma and jasmine.
Which plants eat animals?
Common herbivorous plants are Lauraceae, Venus flytrap, Nepenthes, Nepenthes and so on. They generally grow in harsh environments. In order to get the nutrients needed for growth, some parts of them, such as leaves, are specialized into insect traps, which prey on mosquitoes, flies and small beetles.
Is there a sound in bloom?
Flowering, with the movement of flower organs, will produce a certain sound, but this sound is difficult for human ears to distinguish.
How to tell the sex of plants?
A complete flower consists of six basic parts, namely, pedicel, receptacle, calyx, corolla, stamen group and pistil group. Most plants have both stamens and pistils on the same flower, that is, bisexual flowers. This kind of plants can be divided into male and female, such as pumpkin, cucumber, paulownia, corn, zucchini, pea, oak and so on. Some plants have two kinds of unisexual flowers in one plant, which can also be pollinated in the same plant, so it is generally difficult to distinguish between male and female plants; Some plants have only one kind of unisexual flower on a plant, such as poplar, willow, ginkgo, Podocarpus and so on.
Matters needing attention in plant encyclopedia knowledge
What is the longest-lived plant in the world?
The "dragon blood tree" growing in Africa can generally live for 2000 years, and some can live for five or six thousand years, or even 8000 to 10000 years.
What is China's first botanical monograph?
China's first botany monograph appeared in the early 4th century, the Southern Vegetation written by Han Ji in the Western Jin Dynasty. It is the earliest existing local flora in the world, and describes the morphology, living environment, uses and origins of 80 species of plants.
Are there inbreeding or alternate generations of plants?
Existence. For example, the same plant always breeds in a small area, and the offspring of a plant pollinates its parents. This situation will not affect the normal reproduction of plants. The real evolution process of plants mainly depends on the variation (including gene mutation) brought by foreign genes, so as to realize the survival of the fittest. However, long-term inbreeding of some plants will also cause variety degradation.
Do plants have biological clocks?
Of course there is. For example, the flowering time of plants and the sleeping behavior of leaves are dominated by the biological clock of plants, and are also manifested in various physiological phenomena such as respiration, photosynthesis and growth rate of plants.
Which plants glow?
Because there are a lot of phosphorus in plants, phosphorus will emit luminescence when it comes into contact with air, such as "luminous tree" in northern Africa, "cordate telosma" in Cuba and "lantern tree" in Jinggangshan area of China. The brightness of this phosphorescence is proportional to the size of the tree.
What's the secret of flower color?
Why are flowers born on alpine snowfields generally light in color, while tropical flowers are strong and bright in color? Because flowers contain anthocyanins, anthocyanins, carotenoids and other substances. Anthocyanins can be colored according to the pH of leaves and the temperature of the surrounding environment. The pH of each planting object is different, so the color is naturally different. In addition, temperature will also affect the discoloration of anthocyanins, so the temperature is low in the morning and the color of flowers is light; When the temperature is high in the afternoon, the color becomes darker. The color difference between the plateau and the tropics is caused by temperature.
Roses are all varieties of Chinese rose, right?
Roses and roses are native to China. In China, Hongkong, Taiwan Province Province, Guangdong and other regions, the rose has always been called the rose due to the influence of foreign countries. Botanically speaking, "Rose" and "Rose" are two different "species" belonging to Rosaceae. Although they look alike, they are easy to identify by "seeing, touching and smelling". At first glance: from the lobule point of view, the lobule of roses is generally around 3, while the lobule of roses is generally between 5 and 9; The second touch: touch the flower stem, the thorns on the rose stem are relatively large, with about three or four in each section, while the thorns on the rose stem are relatively dense; Three smells: the rose is rich in fragrance, and the rose has almost no taste.
Are there any plants that can walk or move?
Yes In the east and west of the United States, there is an "awakening tree" that can grow peacefully in places with sufficient water. Once there is drought and water shortage, it will "pull" its roots out of the soil and roll them into a ball. Follow the wind, stretch the curly roots when you meet water, insert them into the soil, and start a new life. When drought comes, tumbleweeds in the Gobi desert in the northeast will also collect their roots from the soil and roll them into a ball with the wind.
Animals have parasites, but do plants?
Plants also have parasites. Some plants are parasitic on other plants and maintain their lives by absorbing nutrients from parasitic plants. This phenomenon is called "parasitism". Common parasitic plants are dodder, sorghum, Agkistrodon acutus, mistletoe, mistletoe, rootless vine and so on.
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