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The answers are as follows; 1. Light.
Light is the most important factor for plant growth. Each plant has a different need for light intensity, most plants like to bask in the sun, and a few like shaded places, so before choosing plants for planting, we should first consider the time and degree of sunshine that the environment can give.
2. Moisture. Proper water is given to the plants to maintain normal growth. Some plants are dry and bloom in a slightly dry environment, while others bloom due to rain, depending on the native environment of the plant.
Giving water according to the habit adjustment of the plant is the key to planting.
3. Temperature. Each plant has its own suitable temperature for growth, according to the different native environment of the plant, some like high temperatures, some tolerate low temperatures; Some flowers bloom in the cool season and some in the hot season; Some are dormant and fall asleep. Before planting flowers and plants, it is important to know the right temperature for them to grow.
4. Humid environment.
Plants from the tropical rainforest like a humid environment very much, plants from the desert like a drier environment, different plant native environments, there are also differences in growth habits, but most plants like to grow in a more humid environment.
5. Air. The more air is circulated, the better it is for plant growth. In a well-ventilated environment, plants can grow more smoothly and there are fewer pests and diseases. The leaves of plants photosynthesize during the day, absorbing carbon dioxide and releasing oxygen.
It breathes at night, absorbs oxygen and releases carbon dioxide. However, the roots of plants are respiring at all times, so the roots of plants need a lot of oxygen, and if the air circulation is insufficient, resulting in a lack of oxygen in the roots of plants, it will be harmful to the growth of plants.
6. Soil. Plant cultivation media that contain the right nutrients is beneficial to the growth of plants. Some plants originally grew in deserts or humid swamps, where these barren areas do not have much nutrients on their own.
If too much nutrients are given to these plants, it will hinder the growth of the plants, for example, if too many nutrients are given to the cactus, it will cause its stems to split, so the amount of nutrients depends on the native environment of the plants.
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Plants in different environments have different needs for sunlight, water and other conditions. For example, aquatic plants are adapted so that they can grow in water, while other plants cannot. For example, plants that grow in different regions, such as cacti and banana trees, have different water and temperature requirements.
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The characteristics of plants adapting to arid environment: 1. Morphologically speaking: the root system is developed and deep-rooted, and the root-shoot ratio is large, which can effectively use soil moisture, especially the water in the depths of the soil, and can maintain water balance.
The leaf cells are small, the leaf veins are dense, and the number of stomata per unit area is large, which strengthens transpiration and is conducive to water absorption. 2. Physiological characteristics: the permeability of cell fluid is low, it can resist transitional dehydration, and the stomata close late in the case of water deficiency, and photosynthesis.
If it is not stopped immediately, the synthetic activity of the enzyme is still dominant, that is, it maintains a certain level of physiological activity, and the synthesis is greater than the decomposition.
For plants to live in such an environment, they must have the ability to resist extreme drought; Enhance water absorption, reduce water loss and store large amounts of water. However, different species have different ways of fighting drought; Examples include the genus Opuntia and Euphorbia.
In some species, they can live in desert areas because their stems become obese and fleshy, their leaves degenerate, and the parenchyma cells in their bodies can store large amounts of water; The stored moisture can sometimes reach up to 95 per cent.
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1.Control growth.
2.Store moisture.
3.Flowering pollination.
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Plants that grow underwater do not need sunlight. (
1. When recording the height of a large tree, you can use the buildings around it. (2. There are branches and leaves on the crown of a large tree. (3. Plants cannot move, so they are lifeless.)
4. When we come to a big tree to observe, we should first think about what to observe, and then think about how to observe, and then carefully observe in a certain order. (5. We can shake the branches and observe what is hidden in the canopy.) (6. The leaves of dogtail grass are egg-like and ovate.)
7. Water hyacinth is a herbaceous plant. (8. Plants that grow underwater do not need sunlight.) (9. In autumn, the trunk of a tree does not grow thick, indicating that the tree has died.)
10. Trees grow in a certain environment and have certain survival needs. (11. The swelling of the spongy body at the petiole of the water hyacinth is filled with air, which is the reason for sinking to the bottom of the water.) (12. Plants are constantly changing, some of which are more obvious, and some of which are less obvious.)
13. The change of plants is one of the characteristics of living organisms. (14. The leaves of many plants grow from spring to wither and die in winter, completing the life of the leaves.) (15. Although some trees do not lose their leaves in autumn, their leaves also have a complete process of growth and aging.
16. In the spring season, many plants quickly enter the maturity period, germinate, grow, blossom and bear fruit. (17. There are plants in the world that have a short lifespan, but there are no plants that have a long lifespan.) (18. As the old saying goes:
Everything depends on the sun to grow", and the relationship between plants and sunlight is very close. (19. Algae and ferns do not bloom, they reproduce with their own spores.) (20. The differences between trees are:
The crown of the tree is of size, the trunk is thick, the shape of the leaves is different, and the fruit is different. (21. It is one thing to look casually and observe. (22. Herbaceous plants will die, but big trees will not die.)
23. Using drawings and rubbings to record and collect some physical specimens are all methods that we can use when observing and describing trees. (24. In order to observe the leaves, we can pick the leaves we need on the tree at will.) (25. Humans have life, but plants have no life.)
26. There are many plants growing on the land, and many plants also growing in the water. (27. Compared with the fallen leaves, fresh leaves are the same except for the different colors.) (28. Trees are woody plants, and grasses are herbaceous plants.)
29. The leaves are all green. (30. A complete leaf is composed of leaves and petioles. (31. Plants only need water and air to grow, and do not need sunlight.)
32. Only by observing the big tree with a purpose can we discover more. (33. The stems of large trees and small grasses are equally hard.) (34. Plantain and water peanut are both aquatic plants.
35. Duckweed does not need soil to grow. (36. Spring is the season when trees lose their leaves.) (37. Fresh leaves are yellow.)
38. Chrysanthemums generally bloom in autumn. (39. Some trees grow for a long time and will never die.)
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Because the crystal orchid is different from other plants with chlorophyll, its stems and leaves do not contain chlorophyll at all, so it cannot photosynthesize, it is saprophytic, and lives in the forest where thick fallen leaves accumulate. The root system of crystal orchid is very thin, and it lacks the root hairs that absorb nutrients in the soil, so it needs to combine with the hyphae of some fungi to form a mycorrhizal symbiont, and then the mycelium is responsible for absorbing the water, inorganic salts, etc., and provides the crystal orchid through the mycorrhizal symbiont, and the crystal orchid provides organic acids and other ridges for the fungus, and the two are mutually beneficial and win-win life.
Shui Wu Shen Jing Orchid that grows in rotten leaves.
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This issue needs some clarification. In fact, substances such as sunlight, air, water, and soil are all necessary for plant growth, and each of them plays an important role in the growth of plants. Sunlight is the energy for plants to photosynthesize**, providing the nutrients and energy they need.
Carbon dioxide in the air is one of the essential substances for photosynthesis. Water is necessary for plant growth, providing the structure and nutrients of plants. The soil contains nutrients and minerals that plants need.
As for the fact that flowers do not need sunlight, this statement is incorrect. While not all plants need direct sunlight, all plants need bends to photosynthesize. Even in an environment with insufficient sunlight, plants still need indirect light for photosynthesis.
Therefore, flowers also need light to grow and reproduce.
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When there is too much moisture:
1. Hypoxia and excessive water will compress the air in the soil, which will affect the normal respiration of plant roots, resulting in anaerobic respiration in plant roots, causing plant roots to rot, affecting the absorption and utilization of plants, and resulting in poor plant growth.
2. Nutrient dilution, too much water will dilute the nutrients in the soil, affect the absorption and utilization of plants, and lead to poor plant growth.
When there is too little moisture.
When the plant is short of water, it will affect the absorption of nutrients in the soil by the root system, resulting in the dwarf of the plant, and the lack of water in the plant, the water of the transpiration of the plant leaves is not proportional to the water absorption, which will lead to the drying of the leaves, and the serious leaves will fall.
When the plant is short of water, it will also affect the flowering and fruiting of crops, and the plant will die in the case of a long time of water shortage.
The yield of the bright chain of plants is generated when solar energy is converted into chemical energy, and the decrease of water in the soil will affect and affect the absorption of water by the root system and the transpiration of leaves, resulting in the inability to convert solar energy into chemical energy normally, thereby reducing the accumulation of dry matter and producing the phenomenon of reduced plant yield.
When there is a lack of water, it will also lead to damage to the root system of the plant, and the root system of the plant will continue to stretch deep into the soil in the process of growth, so as to absorb the water stored in the soil to meet its own needs, and then transport it to the aboveground part.
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According to the adaptation of plants to different light intensity, plants can generally be divided into three categories:
(1) Sunny plants(2) Shade plantsShade plants (sciophytes) are plants that grow better in low light conditions than in bright light. Weak light is relative to the light intensity of the plants in the sun, not the weaker the light intensity, the better, if the light is too weak to reach the light compensation point of the plants in the shade, they will not be able to grow normally. In general, shady plants can grow and develop normally at 1 50 years of full light, and their optimal light intensity for photosynthesis is lower than that of full sunlight.
Plants in the shade mostly grow in moist, shady places or in dense forests. For example, the ferns under the forest judge Lao Zheng plants, bryophytes, and even money grass, as well as hemlock, yew, ginseng, three.
Seven, Banxia, etc.
(3) Shade-tolerant plantsShade-tolerant plants are plants that fall somewhere in between. This type of plant has a wide adaptability to light intensity, but grows best under the sunshine of Quanhanling. The minimum amount of light they require is approximately equal to 1 15 1 6 of full illumination.
Generally, the strength of shade tolerance varies according to the nutrient conditions, temperature and water status of the soil. For example, wheat winter, polygonatum bamboo, spruce, codonopsis, cinchona and so on are shade-tolerant plants.
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Phnom Penh rich bambooIt is also called longevity bamboo, likes warm and humid environment, avoids direct sunlight, and is afraid of cold. Afraid of the sunIt likes high temperature and humidity environment, is not cold-tolerant, and freezes below 13.
Spray frequently during the leaf growth period to maintain humidityAvoid strong light exposure.
The growth of ferns is inseparable from the high humidity environment, especially the scaly fern, which is more demanding. In addition, arrowroot, begonia, saxifrage, pineapple, reticulated grass, fruit taro, philodendron taro, silver king bright silk grass, Lou's alocasia, etc., they require air humidity to be maintained at 70 80.
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Aquatic planting must be carried out in ponds, pools and other water environments, but also to ensure that there is sufficient sunlight, aquatic requirements of the soil is rich in organic matter pond mud.
Strawberries are grown at a temperature of 17 to 18 degrees Celsius and are light-loving. Take care to avoid drought. The soil needs to retain moisture and be well ventilated.
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Loofah. The loofah has strong luminosity and good ventilation, and is usually planted mainly by scaffolding, and the gap in front of the house and behind the house is also an ideal place to plant the loofah. Loofahs do not distinguish between soil conditions, but growing on fertile and loose soil is a prerequisite for increasing yields.
The loofah fertilizer is mainly based on sufficient basic fertilizer, and the base fertilizer is subject to farmhouse fertilizer, equipped with compound fertilizer with more phosphorus and potassium, which helps plant growth and female flowers to bloom, and promotes the increase of loofah yield.
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Raw stone flowers. In summer, the weather will be dormant, like the sun, suitable for the temperature of 20 to 24, spring and autumn are easier to raise.
Orchids: Afraid of soot pollution in winter.
Rhododendron americana: requires to live in slightly acidic soil, pH value.
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Light, temperature, moisture, air, and soil are key environmental factors that affect plant growth and development. The effects of these environmental factors on plants are described below:
Light: Light is a necessary factor for plant growth, and its intensity and quality will directly affect the growth and development of plants. Sufficient light can promote plant photosynthesis, increase chlorophyll synthesis, and improve yield and quality.
Different plants have different light needs, for example, positive plants need enough light to grow normally, while negative plants need moderate shade.
Temperature: Temperature has a direct impact on plant growth and development. Low temperatures can inhibit plant metabolism and growth, while high temperatures can lead to water loss, drought and death.
The right temperature helps to speed up the growth rate of plants and promote the formation and development of flower and fruit brigades of plants.
Water is an important factor in plant growth. Water can promote photosynthesis in plants and maintain the normal absorption and distribution capacity of the plant body. Too much or too little water can cause growth restriction or death of the plant.
Air: Oxygen and carbon dioxide are essential gases for plant growth. Oxygen is an important energy source for plant respiration, and carbon dioxide is the raw material for plant photosynthesis.
Pollutants and harmful gases in the air can affect the normal growth of plants, such as air pollution can cause a decrease in leaf area and photosynthesis in plants.
Soil: Soil provides the nutrients and water that plants need and is essential for plant growth and development. The pH of the soil, the organic matter content, the nutrient content and the species, texture, aeration, etc., all affect the growth and development of plants.
Different plants also have different soil requirements, for example, barren-tolerant plants are adapted to grow on poor soils, while fertile soils help to increase plant yields.
In conclusion, light, temperature, moisture, air and soil are the five major environmental factors that affect the growth and development of plants, and different plants have different needs and adaptations to these factors.
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