Why do cacti grow in areas that are arid all year round?

Because it has a strong vitality.

Cacti, covered in thorns, are resistant to drought for the following reasons:

Because of the large area of the leaves of plants, the water in the body is easy to transpirate from the leaf surface, but the cactus skillfully turns the leaves into thorns, which greatly reduces the transpiration area and makes it difficult to lose water in the body. In addition, the cactus' green fleshy stems not only replace the leaves for photosynthesis, but also cover the surface with an extraordinary "coat".

This layer of "Oak State Coat" is impermeable, like a layer of wax applied to the outside of the body, which protects the water in the body tightly. Another important thing about cacti being thirst-tolerant is that their bodies are fat and fleshy. Once it rains, it can absorb a large amount of water and store it in the fat body, like a small reservoir that can store water, and then slowly take it out when needed to use it for sensitive limbs.

The flower language of the cactus

1. Flower language related to appearance and habits.

The first is "strong", the cactus lives strong in the desert, and this flower language is born. The second is "warmth", its presence gives people a feeling of warmth, especially in the desert bridge where no other plants grow. The third is "resolute love", its character is related to love, and there is this flower language.

The fourth is "strong on the outside but soft on the inside", according to legend, the cactus was originally the softest on the inside, and later it was given a hard appearance, so it also became its flower language.

2. Hide the language of flowers.

In addition to the above-mentioned obvious flower language, it also has some hidden flower language. For example, "loneliness", cacti living alone in the vast desert are indeed lonely. This is associated with love, and the flower language of "love that can't be obtained" is derived.

Growing environment. Cactus likes sunshine, warmth, drought tolerance, is afraid of cold, waterlogging, acidic soil, suitable for growing in neutral, slightly alkaline soil, pH value. For this reason, the family cultivation of cactus should be placed on the windowsill with sunlight, and the sandy soil with good ice turning is preferable.

Methods of reproduction. Cacti are cultivated at home, and asexual propagation is mostly used, that is, the division method, the cutting method and the grafting method.

Branches. Most cactus flowers are very easy to divide seedlings or balls, and their seedlings or balls are pulled out and planted separately, which is very easy to survive. For some varieties that are not easy to meristem balls, they can be forced to reproduce daughter balls by cutting off.

That is, the upper part of the stem of the mother plant is cut off (the cut part can be used as a cutting, grafted or cutting), so that it loses the growth point of the upper part and can no longer grow upward. Strengthen water and fertilizer management, and new balls can grow. Cuttage.

Most of the cacti cultivated at home are propagated by cuttings, and the survival rate is extremely high. Cuttings can be done in spring, summer and autumn. Cuttings should be selected not old and tender stems, cut the stems from the mother plant, first put in a semi-shaded and ventilated place to dry for 5-7 days, and so the incision is dry, the cortex shrinks slightly inward, and a layer of film is generated, and then cuttings, the length of the cuttings is 10 cm, and the depth of the cuttings is 3 cm.

Insert it into the sterilized sandy soil, water it after a few days, and water it slightly when watering to prevent the cuttings from rotting, and the cactus generally takes root after 20 days of cuttings.

The reason why the desert cactus survives well in arid environments is that its root system is very large, it can absorb water deep underground, its leaves are needle-shaped, which can slow down the evaporation of water, and its stem has a layer of wax on the surface of its stem to protect it from dehydration caused by strong sunburn.

First, the root system is huge.

The root system of the cactus is very well developed, and it can not only penetrate deep into the ground, but also spread and grow around. Some varieties have roots that can grow up to tens of meters long and penetrate deep into the ground to obtain groundwater. In addition, its root system is relatively strong, and the roots are very strong, which can ensure that it will not be unable to absorb water due to root problems.

Second, needle-shaped leaves.

Its leaves are needle-shaped, which is formed by the degradation of its habitat in order to adapt to the living environment of long-term water shortage. The needle-shaped leaves have a small area and are effective in reducing water evaporation, helping the plant retain more water.

3. Waxy stems.

It has a wax on the surface of its stem, which protects it from dehydration caused by strong sunlight. In addition, this layer of wax slows down the evaporation of water from the plant's body, helping it resist drought.

The cactus is a tropical plant that is a clump of succulent shrubs that resembles the palm of a hand. In order to reduce the evaporation of water, the leaves degenerate into needle-like spines, which are shorter in the early years and longer and thicker in the later growth. The overall color is dark green, the stems and leaves are thick, and the roots are slender.

It can bloom, the flowering period is from June to October, and the flowers are yellow. It is tenacious and can grow in arid deserts with little need for water. <

The cactus is a tropical plant that belongs to the clump of succulent shrubs, and the shape of the Hepacha is more like the palm of the hand. In order to reduce the evaporation of water, the leaves degenerate into needle-like spines, which are shorter when young and longer and thicker in later growth. The overall color is dark green, the stems and leaves are thick, and the roots are slender.

It can bloom, the flowering period is from June to October, and the flowers are yellow. It has tenacious vitality and can grow in the dry desert with little demand for water.

Its root system is huge.

Why the cactus is not afraid of drought plays a decisive factor is that its root system is very large, and it is a divergent growth pattern to the surroundings, it is a kind of plant in the tropics, growing in the desert area all year round, the water resources in the desert area are very scarce, and the cactus to adapt to the living environment there, it can only grow its roots longer, farther away from the land, in order to absorb the nutrients and water resources they need to leak, so as not to die of thirst.

The stalk of the cactus is relatively thick and fat, is composed of a lot of parenchyma element cells, its stem flesh is very soft, has a good contraction property, which causes it to freely expand and contract its own body to play the role of storing water, for the absence of water in the case of the wheel posture, it can protect the epidermis by shrinking the stem flesh, and will not produce wilting due to thirst.