Why are oleanders planted more along the railways in the southern provinces?

Oleanders are not only found next to railways, but also on both sides of highways. First, there is a thin layer of "wax" on the leaves of oleander, which can retain water and heat for the leaves, so that the plant can resist the cold, so that oleander is not afraid of cold, and in winter, it is still green; second, it has strong drought tolerance, does not have strict requirements for soil, and can grow on alkaline soil, oleander has strong adaptability, and cultivation and management are relatively easy; Third, oleander has the ability to resist smoke, dust, poisons, purify the air and protect the environment. The leaves of oleander have a strong resistance to harmful gases such as sulfur dioxide, carbon dioxide, hydrogen fluoride, and chlorine.

Oleander is native to India, Iran, Afghanistan, likes warm and humid climate, cold tolerance is not strong, in the south of the Yangtze River basin in China can be planted in the open field, not resistant to water and moisture, requiring the choice of high dryness and good drainage of the place to plant. The ability to resist air pollution is strong, the resistance to toxic gases such as sulfur dioxide, chlorine, smoke and dust is very strong, and the absorption capacity is also strong, so it is an excellent tree species for the greening and decoration of industrial and mining and railway platforms.

The climate in the south is humid, the rainfall is more, and the alkali content is relatively high, while oleander is not strict with the soil, it can also grow on alkaline soil, and it can also solidify the soil to ensure that the railroad tracks will not loosen.

Contraception!! Aren't there many babies who have children on the train now!!

Oleander has the ability to resist smoke, dust, poisons and purify the air and protect the environment. The leaves of oleander have a strong resistance to sulfur dioxide, carbon dioxide, hydrogen fluoride, chlorine and other toxic and harmful gases to the human body.

It looks like an oleander, I don't know if it's an oleander.

According to legend, oleander is very poisonous and only needs 10 leaves! can kill and be invisible!

The ability of oleander to absorb dust is very high, and it is not considered poisonous, the plants of the Euphorbiaceae family are like that, but they are easy to make people allergic, that is, the juice and pollen are generally planted in open places, and human allergies are rare.

Who said that it can purify polluted air, that it is good for humans, and besides, poison is nothing more than its own defense.

It can effectively absorb pollutants in chemical polluted environments.

Oleander has the effect of anti-smoke, anti-dust, anti-poison and air purification, especially to sulfur dioxide, hydrogen fluoride, chlorine and other toxic gases have strong resistance and adsorption effect. Even if the oleander is covered with dust, it can still grow vigorously, so it is known as the "environmental protection guard" in the garden industry.

Oleander ** is not high, the growth rate is fast, it can be formed in 2 to 3 years, and the oleander flower period is very long, it can bloom from May to November, so it is also widely planted in countries around the world. "Because of the growth, ornamentality and environmental protection of oleander, it is widely planted in urban gardens, roads, communities and units.

It can come in handy when someone is bullying you.

Oleander prefers abundant sunshine and a warm, humid climate. It is cultivated in many places in the southern region, with strong growth, developed root system and strong drought tolerance. Northern potted plants, winter needs to be overwintered indoors, and the room temperature is maintained at 7 15 .

Oleander is highly adaptable, resistant to smoke and harmful gas pollution, and easy to cultivate. Ground-planted oleanders should be transplanted in spring, and in order to maintain plant balance, some of the upper branches and leaves can be cut off. Compact and water after transplanting, but do not accumulate water to facilitate the roots.

The transplanted plant is ready to bloom in the same year. Oleander transplanting is easy to survive, and seedlings with soil or bare roots can be used, but they must be planted in the spring when the buds germinate. Oleander buds are stronger, and senescent plants can be pruned in the spring, where all branches are cut off from the base to allow them to germinate new branches.

Generally, the plants can also be pruned appropriately in spring. Oleander is mostly propagated by cuttings, with a high survival rate, and can be cut in spring and summer. In spring April, combined with pruning to take 15 20 cm long, the upper end with 5 cm long 3 branch cuttings, the lower end soaked in clean water, about 10 days to see the incision sticky, can be taken out and inserted in the seedbed or pot, placed in the semi-shade, pay attention to avoid the wind, keep the potting soil moist.

In summer, it can be soaked in water for 20 to 30 days, pay attention to changing the water, take it out after rooting, plant it in a sand bed or flower pot, start to pay attention to shade, and then gradually move to strong light for maintenance. A small amount of propagation can also be propagated with a strip. In summer, potted oleanders should be watered frequently, but not too much, and keep the potting soil moist.

Oleander also has a characteristic, as long as there is a large water or drought, the lower leaves of the plant will soon all turn yellow and lose their leaves, so watering should be timely. After strong pruning in early spring, it is necessary to pay attention to water to avoid rotting the root bark. Oleander likes fertilizer, liquid fertilizer can be applied frequently during the growth period, and well-rotted organic fertilizer can also be applied once a week, and the soil should be loosened after application, so that more flowers can be made.

After the flowers of oleander wither, they should be removed in time.

Oleander has the ability to absorb drugs and purify the air and protect the environment.

There are oleanders in the old Beijing courtyard.

Oleander is not suitable for indoor planting, which is harmful to the human body.