What's the name of this plant? What's the matter with all the branches and leaves withered? How to raise it?

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-like light, like iron, slightly tolerant of semi-yin. Like to keep warm, not too cold-resistant, when planting in Shanghai open field, we need to take warm measures such as straw wrapping in winter. I like fertile, moist and slightly acidic soil, but it can also resist drought. Slow growth, 10 years old plants can bloom. [2]

Because of the slow growth of the humid soil environment in the west of Suzhou Creek, it is necessary to pay attention to the fact that the amount of water should not be too large, otherwise it is not conducive to the normal physiological activities of its roots. From March to September every year, topdressing the plants with dilute liquid fertilizer once a week can effectively promote leaf growth. Su Tiexi enjoys a sunny environment. Try to keep the environment ventilated, otherwise plants are prone to scale insects. Su Tie likes warmth and avoids cold. The suitable growth temperature is 20 ~ 30℃, and the overwintering temperature is not lower than 5℃. [3]

3 Distribution scope editing

Produced in Fujian, Taiwan Province Province and Guangdong Province, it is often cultivated everywhere. In Fujian, Guangdong, Guangxi, Jiangxi,

Yunnan, Guizhou and East Sichuan are mostly garden plants, while Jiangsu, Zhejiang and North China are mostly potted plants.

Overwintering in the greenhouse in winter. It is also distributed in southern Japan, the Philippines and Indonesia. Cycas likes warm and humid environment, can't resist cold, grows very slowly, and its life span is about 200 years. Age of tropical and subtropical trees in southern China

Trees older than 10 bloom and bear fruit almost every year, while Cycas cultivated in the Yangtze River basin and northern areas often do not bloom all their lives, or occasionally blossom and bear fruit. Type specimens were collected from Japan. [4]

4 main value editor

Cycas is a beautiful ornamental tree species, which is widely cultivated. Its stem contains starch and can be eaten. The seeds are oily, rich in starch, slightly toxic, edible and medicinal, and have the effects of treating dysentery, relieving cough and stopping bleeding. It has the function of absorbing toxic and harmful gases such as sulfur dioxide, nitrogen peroxide, benzene, fluorine, mercury vapor and lead vapor. [4]

Medicinal value

Source: Cycas. Cycadaceae Cycads, whose leaves, roots, flowers and seeds are used as medicine. Roots and leaves can be collected in four seasons, flowers can be collected in summer, and seeds can be collected in autumn and winter and dried.

Tropism of nature and taste: sweet, light, flat and slightly toxic. This species is a poisonous plant, and its toxicity is slightly toxic to seeds and apical pulp of stems. People will feel dizzy and vomit after poisoning. Residents of Iwo Jima are poisoned by eating starch made from this plant. Their symptoms include sweating, vomiting, coma and even death.

Functional indication

Leaves: astringe and stop bleeding, detoxify and relieve pain. Used for various bleeding, gastritis, gastric ulcer, hypertension, neuralgia, amenorrhea and cancer.

Flowers: regulating qi and relieving pain, benefiting kidney and solidifying essence. Used for stomachache, nocturnal emission, leucorrhea and dysmenorrhea.

Seed: calming the liver and lowering blood pressure. Used for hypertension.

Root: expelling wind and activating collaterals and tonifying kidney. It can be used for treating pulmonary tuberculosis hemoptysis, toothache due to kidney deficiency, low back pain, numbness and pain of rheumatic joints, and traumatic injury.

Usage and dosage: yehua1~ 2; Seeds and Roots 3 ~ 5 yuan.

Note: Cycas seeds and stem tips are toxic, so use them with caution.

Ornamental value

The tree shape of Cycas is simple and the trunk is as thick as iron. Feather leaves are clean, smooth and bright, evergreen all the year round, and it is a precious ornamental tree species. In the south, it is planted in front of the yard and in the lawn; Suitable for large potted plants in the north, it is very beautiful to decorate courtyard corridors and halls.

5 cultivation technology editor

Breeding mode

It can be propagated by sowing, tillering and burying.

Fruit bag shape at the top of cycad (4 pieces)

Seed propagation and tillering propagation are the main propagation modes of Cycas. Because it is difficult to obtain seeds, tillering propagation has become the main propagation mode. [4]

Sowing propagation

Seeds are collected at the end of autumn, sown at the time of collection, or stored in sand for planting when needed in the next spring; Because the seed coat is thick and hard, germination is slow, usually after 4 ~ 6 months; The temperature should be above 15 degrees, and the soil should be covered deeply, about 3 cm. At the high temperature of 30 ~ 33℃, it can germinate in about 2 weeks. Seedling growth is slow, and seedling transplanting takes 2 to 4 years.

Cultivation method

First, farming soil: it is best to have fertile sandy loam. The mixing ratio is 1 loam, 1 humus and 1 coal ash, and they are fully mixed. This kind of soil is loose and fertile, permeable and breathable, which is very suitable for the growth of Cycas. [5]

Second, reproduction: there are three ways of reproduction: sowing, tillering and cutting. Tillering bud cultivation is the most common, which can be carried out from spring to autumn, with the best effect in spring. In early spring, when the tillering buds of old plants are as big as eggs.

From March to April, cut off the mother plant with a sharp knife, cut off the stem skin as little as possible, cut off the leaves and put it in the shade for about 7 days. After the wound is slightly dry, transplant it into the culture soil, water it once, and put it in a semi-shady place.

Roots and leaves grow in 45 days at 27-30℃. [5]

Third, cultivation management. Su Tiexi likes warm and humid environment, and is slightly tolerant of shade and cold, and generally grows 2 new leaves every year. The first round is in May and the second round is in August. The leaves of Cycas are short and stout, which have high ornamental value. To make blades

Short and strong, the role of water and light is extremely important. Every year, the hairs on the top of the stem of Cycas are blooming, and when new leaves are about to be extracted, watering and fertilization should be stopped to ensure sufficient light until the leaves are fully developed and the petioles are completely extracted.

It can be water, and it should be rain at the same time. When watering, water less for the first time, then increase it gradually, and apply appropriate amount of nitrogen and potassium fertilizer. If possible, rotten vegetable cakes can be diluted with water and watered every 10 day. Ruoxin

When the leaves become Huang Shi, ferrous sulfate can be applied to supplement the habit of Cycas fond of iron. Cycas are afraid of waterlogging, and water should be controlled in spring, autumn and winter. Too much water tends to rot the roots. Cycas like sunshine, but in summer the sunshine is too strong and the temperature is too high.

The film is easy to be scalded, resulting in yellow and white spots. Therefore, potted Cycas should be placed in a well-ventilated and well-lit place in summer, and the leaves should be sprayed with water frequently at high temperature. [5]

Fourth, pruning. When the stem grows to 50 cm high, the old leaves should be cut off in spring, and then cut once a year, or at least once every three years. If the plant is still small and the spreading degree is not ideal, all the leaves can be cut off, which will not affect the angle of new leaves and make the plant more perfect. When pruning, try to cut to the base of petiole to make the stem neat and beautiful. [5]

Fifth, change pots. Potted Cycas are changed at least once every five years. When changing pots, phosphate fertilizer such as bone powder can be mixed into the pot soil, and the pot changing time is about 15℃. At this time, the growth is vigorous, and some old roots should be cut off appropriately to facilitate the timely growth of new roots. [5]

pot culture

Cultivation tips: when changing pots in early spring, cut off tillering buds (also called sucking buds) from the base of mother plants, and plant them in pots after the incision is slightly dry. In spring, you can go to the flower market to buy Cycas stems for potted plants.

Potted soil can be mixed with humus soil or peat soil plus about 1/4 river sand and a small amount of base fertilizer, or mixed with 4 parts humus soil, 4 parts garden soil and 2 parts river sand. Spread broken tiles on the bottom of the basin to facilitate drainage. Suction buds are planted shallowly in a mud basin, watered and placed in a semi-shady place, and gradually exposed to sunlight after survival.

When the temperature rises to 20 degrees in early summer, new buds begin to grow and new leaves are pulled out, indicating that the roots at the lower part have grown out and cannot be placed in the semi-shade. Otherwise, the new leaves become slender and the new leaves are pulled out, indicating that the roots at the lower part have grown out and cannot be placed in the semi-shade. Otherwise, the new leaves will become slender and affect the ornamental value, so they should be put in.

Photo Gallery of Cycas (20 photos)

A well-ventilated and sunny place. During the growing period, water should be sufficient. When new leaves grow vigorously, always keep the soil moist and spray water in the morning and evening to keep the leaves fresh. Be careful not to have water in the basin, otherwise it will cause rotten roots and stems; But if the soil is too dry, the leaves will turn yellow and wither.

The soil moisture should be kept at about 60% during the maintenance of Cycas, and the principle of seeing dry and seeing wet should be followed when watering. In the vigorous growth period of leaves in spring and summer, especially in the hot and dry climate in summer, it is necessary to water more, and spray water on the leaves every morning and evening 1 time to keep the leaves fresh and green. Water 2 ~ 5 days after autumn 1 time. Compound fertilizer or urea 1 ~ 2 times a month during the growth period. It is best to spray urea on leaves with 0.2% aqueous solution as foliar fertilizer, and the principle of "eat less and eat more" should be followed in applying foliar fertilizer. Peanut bran is applied 1 time in early spring every year, which can be directly applied to the basin surface or buried in the soil without retting. Don't get oil stains on the rice washing water before cooking at home every day. It is necessary to pack a bucket and pour liquid fertilizer the next day, which has certain fertilizer effect.

Water 1 ~ 2 times a day in summer. After autumn, water should be properly controlled, generally watering every 3 ~ 4 days 1 time. In winter, the watering interval needs to be longer, less watering, and the basin soil can be dried.

All right. If it continues to be too wet, it is easy to rot the roots and turn the leaves yellow and sharp. Fertilize during the growth period, applying 1 time every month, diluting 40% of the decomposed bean cake fertilizer and adding 0.5% ferrous sulfate. Rusted nails and iron sheets can also be used as iron in the soil.

It gradually infiltrated into the soil and was absorbed by Cycas, making the leaves of Cycas green. Avoid sun exposure in summer, prevent freezing and keep warm in winter, and winter can be safe above 0 degrees. For the withered and yellow basal leaves, the old leaves should be trimmed appropriately to regenerate them.

Leaves. [4]

control of insect

Spots:

This is a fungal disease. After infection, the leaves are light brown spots at first, and then spread into a nearly round or irregular shape with a diameter of 65438 0 mm ~ 5 mm. The center of the lesion is dark brown to grayish white, the edge is reddish brown, and the lesion is black.

Small spots, due to the relationship between diseased spots, form spots, leading to leaf death and fracture. In hot and rainy weather, the disease spreads easily. In terms of prevention and control, the cultivated soil should be suitable for slightly acidic sandy soil and should be leached more in summer.

Water and sick old leaves should be removed in time. At the initial stage of the disease, 600 times of Bordeaux mixture or 75% chlorothalonil wettable powder, 800 times to 1000 times of 50% thiophanate wettable powder, or 1000 times of potassium permanganate solution were sprayed every day, and the effect was good.

Scale insects: balcony planting and maintenance, ventilation and light transmission is not good enough, leaves are often vulnerable to scale insects. At the early stage of the disease, there are several preventive and therapeutic methods: ① Add water to white wine at the ratio of 65,438+0: 2, and thoroughly pour the topsoil every half month for four consecutive times, which will have an effect. ② Repeated rubbing of injured leaves with alcohol can kill adults and larvae. (3) Soaking rice vinegar with cotton balls and gently rubbing the damaged leaves can wipe off the scale insects and kill them, and also make the leaves turn green and shiny again. [2]

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