Which is broken by the mountain of cold tolerant plant species?

The south side is also sunny, where there is plenty of sunshine, and it should be better if the cold-tolerant plants are planted on that slope.

There are many that are not cold-tolerant, and the vast majority of tropical plants are not cold-tolerant, such as many plants growing in Hainan, Guangdong and other places.

Such as rubber, coconut palm, fortune tree, king palm, banana, star fruit, etc., are all plants that are not cold-tolerant. For example, rubber trees can die if the temperature is below 7 to 10 degrees.

Bananas, natural rubber, citrus, pineapple,

Cedar is a shallow-rooted tree, the north enters the winter wind, for the cedar shallow root tree, can give the beautiful cedar a wind barrier, this is the most ideal method of frosting, cedar grows in the Yangtze River Basin, in recent years in Beijing also has a large number of planting, its root system is shallow, wind resistance is poor, every winter, will set up a wind barrier for it, shelter the strong northwest wind.

Another method of covering the soil, the so-called method of covering the soil is to cover the soil to prevent cold should be carried out when the cedar seedlings have stopped growing, the soil freezes 3-5 days before (around the beginning of winter), and the temperature is stable at about 0. The specific method of covering the soil and preventing cold: plow the trail (or ditch) with a plow, cover the soil in one direction to the bed (ridge) surface after breaking the soil, so that the seedling tips fall to one side, and do not cover the soil from the top of the seedling downward.

The covering soil should be uniform and buried tightly, so as to avoid frost damage caused by soil ventilation, and the windward side of the south side of the bed should be properly thickened. After covering the soil, it is necessary to check frequently, and find that the seedlings are covered in time. 1 2 weeks before the seedlings in the spring of the following year, when the temperature is stable at 5 left, the soil will be removed twice, and the soil will not be withdrawn on windy days, which is conducive to slowing down the seedlings and gradually adapting to the changes in environmental conditions.

The removal of the soil should not be too late, otherwise the soil will freeze and sink, adhere to the seedlings, affect the growth, and inconvenient operation. After the soil is removed, it is necessary to irrigate in time to prevent spring drought. After the winter water is irrigated, combined with the sealing weir, a mound of soil with a diameter of 50 80 cm and a height of 30 50 cm is cultivated at the root neck of the tree, which can prevent low-temperature frostbite on the root neck and roots, and can also reduce the evaporation of soil moisture.

In addition to cedars, many trees native to the south of the Yellow River and the Yangtze River basin, such as bauhinia and plane trees, are widely planted in the Beijing area. The most commonly used methods are covering soil, wrapping plastic wrap, wrapping straw rope, whitening, etc.

Whitening is another method of protection, not only to protect against insects, but also to protect the bark. Coated with pomegranate mixture mixture liquid, winter in the cracks of the bark, kill insect eggs, prevent frost damage, sunburn, sap flow during the day, cold at night, sap can not go back, bark cracking, white to sunlight reflection.

In the separation zone of many of the main roads, boxwood is planted, which has been obscured by green baffles used to shield the snow melting agent. With these methods, I believe that the plants can survive the winter safely and bloom again next year.

Hello, in general, cedar is a more cold-tolerant tree species, in the southern region, the winter temperature is not very low, and generally do not need to take cold protection measures. However, in the northern region, the air is dry and sandy in winter and early spring, and if you do not take measures to protect the cedar from cold and warmth, it is easy to cause the cedar bark to dry and dehydrate, resulting in poor growth, resulting in a yellowish patch and even death. Hope it helps.

When the severe cold comes, many animals thicken their "skin robes" and live in seclusion, or simply burrow into the warm depths of the earth to "sleep", but many plants are still energetic and immovable, stretching out their green leaves as if nothing happened, as if they did not "feel" the coming of the severe cold.

Are plants really "insensitive" and completely indifferent to the cold? No! Excessive cold can also "freeze to death" plants.

For example, when the water in plant cells forms ice crystals, many of the plant's physiological activities cannot be carried out. What's worse is that the ice crystals will burst the cell wall, causing the plant to suffer a "fatal disaster". Aren't frosted greens and radishes sweet and soft?

Sweet because they convert a part of the starch into sugar, and soft because the cell tissue has been destroyed.

However, it is not easy to freeze the water in the plant. For example, delicate cabbage will not freeze until -15, radishes and so on can withstand -20 without freezing, and many evergreen trees will not freeze even at -45, what is the secret?

If thick trees can be explained by the fact that cold air is not easy to invade, then why are tiny branches and leaves, delicate vegetables not easy to freeze? It is also true that cabbage, radish, sweet potatoes, etc., will convert part of the stored starch into sugar when it is cold, and when sugar is dissolved in the water in the plant, the water is not easy to freeze. But if we do the math, we know that this is not the main reason why plants are hardy.

It is important to know that the freezing temperature of the water will only drop after 180 grams of glucose is dissolved in 1 kilogram of water, and even if these sugar solutions are concentrated like syrup, they can only reduce the freezing temperature by 7 8. It can be seen that there must be another reason for this.

It turns out that there are two kinds of water in the body of plants, one is ordinary water, and the other is called "bound water". The so-called "bound water", according to its chemical composition, is no different from ordinary water, but the molecules of ordinary water are arranged in a messy manner and can flow everywhere, while the molecules of bound water are arranged around the plant tissues in a very neat "formation", and the plant tissues are intimately "combined" together, and refuse to be easily separated, so it is called bound water. Interestingly, chemists have found that the "temper" of bound water is much the same as that of ordinary water, such as 100 boiling and 0 freezing.

In winter, the amount of ordinary water in the plant decreases, and the proportion of bound water increases. Since the bound water freezes at a much lower temperature than 0, the plants are of course more hardy.

1. Melaleuca rubrum.

Melaleuca is a very common plant in the south, it grows well in a warm and humid environment all year round, likes a high-calorie and arid environment, and grows particularly vigorously under the scorching sun in summer, but the disadvantage is that it is not cold-tolerant and shade-tolerant, likes slightly acidic soil cultivation, and is not picky about the fertility and water-holding capacity of the soil.

2. Ten merits.

Ten Credits is a common ornamental plant, it is particularly hardy, it is especially good in the shade or semi-shade, it can flower and bear fruit with proper light, with yellow bunches of flowers and small blue-purple berries. It is suitable for growing on some shady slopes and does not like scorching sun and waterlogging.

3. Purple-leaved barberry.

The purple-leaved barberry is a particularly easy plant to grow, it can grow in all kinds of environments, and can grow vigorously in sunny and semi-shady places, but its leaves will only grow brighter and turn purple if it is given as much light as possible, and its leaves will turn green when the sun is not enough.

4. Alum root. If you want to arrange plants and flowers on a shady slope, alum root is a good choice, it is very tolerant of negativity, likes to grow in loose fertile and well-drained soil, its cold tolerance is particularly good, and it can survive in more than 30 degrees below zero.

5. Fugui grass.

At the beginning of the growth will be relatively slow, and after the second or third year it will grow very quickly, the plant is not too tall, this plant is generally used to prevent soil erosion, rich grass even grows under pine trees, in the spring will produce very small white flowers.

In China's ancient literary works, there are three kinds of cold-tolerant plants that are particularly praised, known as "three friends of the cold", these three plants are (plum), bamboo), (chrysanthemum)?

In winter, outdoor cold-tolerant plants compete, chrysanthemums, oranges, and iron trees are more cold-resistant. Camellia and copper money grass are all frozen and yellow.