Sowing methods and matters needing attention of Cycas

In fact, cycads are commonly known as iron trees. Cycads are named because of their high wood density and sinking when they enter the water. Cycad is a relatively common and very beautiful ornamental tree species. The editor will introduce to you the sowing methods and matters needing attention about cycads.

Cycad

1. Seed treatment before sowing after the seeds were harvested at the end of autumn, the seeds were stored in a refrigerator or freezer of-20 ℃ or treated with sand storage, and the seedlings were raised in open field or hotbed from March to April in spring. Cycads are hard-shelled seeds, which are not easily breathable and permeable. Before sowing, the apical cortex of the seeds must be cut off with shears to expose the kernels (see right picture), and then sow to promote early germination.

2. the water retention of sandy soil for sowing is poor, clay and heavy soil is not suitable for sowing, the soil is too wet when the water is large, and the soil is dry and hard when there is little water. The ideal soil is a mixture of fine sand and peat soil.

3. The sowing method can be sowed on demand, and the buried depth is twice as deep as the seed, not too deep or too shallow. The indoor pot soil should be pressed flat, put the seed cover soil and soak the basin, wait for the basin surface soil to be fully moist, put it in a warm and sunny place, and cover the basin with a piece of glass to maintain a higher temperature and humidity. Generally, it begins to take root and sprout about 40 days after sowing.

4. Management after sowing the soil should be kept fully moist after sowing, but there should be no stagnant water. It is best to spray water with a fine-hole spray can at the initial stage of sowing. After the seeds germinate, the mulch should be removed to fully absorb the light.

5. Upper pot transplanting begins when the seedling root changes from white to yellowish brown. The basin soil should be loose and usually mixed with 2 parts of peat soil and 1 part of fine sand. At the initial stage, 3 seedlings could be transplanted in each pot, and then transplanted individually one year later. Cycads like acid fertilizer and water, and fermented alum fertilizer water is applied every half a month (0.2% ferrous sulfate is added to the fertilizer water), which can promote plant growth.

Culture methods and matters needing attention of Cycas

Latin name Cycas revoluta Thunb.

Don't call it iron tree, Phoenix tail iron, Phoenix tail banana, Phoenix tail pine.

Binomial Cycas revoluta

The plant kingdom.

Gymnosperms phylum

Cycas

Cycads

Kesutiaceae

Belong to Cycas

Grow cycad

Distributed in China, Japan, Philippines and Indonesia

Cycads. Commonly known as: iron tree, alias: fire banana, Phoenix tail banana, Phoenix tail pine, Phoenix tail grass, Latin name: Cycas revoluta Thunb. Cycads and cycads are named for their high wood density, sinking into the water, as heavy as iron, and the other because they need a lot of iron for their growth. Also known as Phoenix tail banana, fire-avoiding banana, Phoenix tail pine, mostly planted in the south, is now widely distributed in China, Japan, the Philippines and Indonesia and other countries. Cycad is most famous for its flowering, which is called "iron tree blooming". Cycad is a beautiful ornamental tree species, which is widely cultivated and can be eaten with starch in its stem. The seeds are oily and rich in starch, which are slightly poisonous for food and medicine, and have the effects of curing dysentery, relieving cough and stopping bleeding.

1. Morphological characteristics.

The trunk is about 2 meters high, sparse to 8 meters or more, cylindrical if there are obvious helical diamond-shaped petiole remnants. The pinnate leaf arises from the top of the stem, the lower layer bends downward, the upper layer extends obliquely, the outline of the whole pinnate leaf is Obovate and narrowly lanceolate, it is 75-200 cm long, the leaf axis is square and round in cross section, the stalk is slightly tetragonal, there are toothed thorns on both sides, extending horizontally or slightly obliquely, and the thorns are 2-3 mm long. Pinnate lobes up to more than 100 pairs, striped, thickly leathery, hard, 9-18 cm long and 4-6 mm wide, upward oblique and slightly V-shaped, margin significantly curled downward, upper slightly narrowed, apex with spiny tip, base narrow, bilateral asymmetry, lower lateral growth, dark green glossy above, center slightly concave, midrib slightly raised in grooves, light green below, midrib significantly raised Sparsely pilose or glabrous on both sides.

Male cones cylindrical, 30-70 cm long, 8-15 cm in diameter, short stalked, microspore flying leaves narrowly cuneate, 3.5-6 cm long, top broad and flat, its two corners subrounded, 1.7-2.5 cm wide, sharp tip, tip ca. 5 mm, erect, lower part narrowing, upper nearly keeled, lower rib and tip densely yellowish brown or grayish yellow tomentose, anthers usually 3-aggregated Megaspore leaves 14-22 cm long, densely yellowish or grayish yellow tomentose, upper apex ovate to long ovate, margin pinnately divided, lobes 12-18 pairs, strip-subulate, 2.5-6 cm long, apex with spiny tip, ovules 2-6, born on both sides of megaspore petiole, tomentose.

Seeds reddish brown or orange, Obovate or ovoid, slightly flat, 2-4 cm long, 1.5-3 cm in diameter, densely gray-yellow tomentose, glabrescent, mesocarp woody, with two ridges on both sides, no ridge at the top or inconspicuous, with a tip at the top. The flowering period is from June to August, and the seeds mature in October.

2. Growth habits

Cycads like warm, hot and humid environment, can not bear the cold, grow very slowly, and live for about 200 years. Trees more than 10 years old in the tropics and subtropics of southern China blossom and bear fruit almost every year, while cycads cultivated in the Yangtze River basin and northern parts of China often do not blossom for life or occasionally blossom and bear fruit.

Culture methods and matters needing attention of South China Cycas Chinese scientific name South China Cycas

Latin name Cycas rumphii Miq.

Also known as Cycas prickly and Cycas longwei

The plant kingdom.

Gymnosperms phylum

Cycas

Cycads

Kesutiaceae

Belong to Cycas

Grow South China cycad

Distributed from southern Asia to northern Oceania

South China cycad (Latin name: Cycas rumphii Miq.) is also known as Cycas przewalskii and Cycas longwei. It is cultivated in all parts of South China. Produced in Indonesia, northern Australia, Vietnam, Myanmar, India and Madagascar in Africa. The type specimens were collected from Indonesia. It is an evergreen tree. Sex likes bright light and is born in a warm, dry and well-ventilated place. Reproduce by sowing or tillering. It can be used as medicine. For viewing, the young leaves are edible, the pith contains starch, and can be eaten.

1. Morphological characteristics.

Trunk cylindrical, 4-8 m high, sparse to 15 m, distally with residual petiole, branched or unbranched. The pinnate leaves are 1 to 2 meters long, the leaf axis is nearly round or triangular in cross section, the petiole is 10 to 15 centimeters or more long, often with three obtuse edges, short thorns on both sides, and the distance between thorns is 1.5 to 2 centimeters, sparse and unarmed. Lobes 50-80 pairs arranged in two rows, long lanceolate or strip-shaped, slightly curved or straight, leathery, green, glossy, midvein retuse on both surfaces, apex acuminate, margin flat or slightly reflexed, sparse microwave, base asymmetric, upper side sharply narrow, lower side wider or narrower, decurrent growth, pinnate lobes in the middle of leaf rachis 15 cm long and 10 mm wide. Male cones have short stalks, elliptic moments, 12 cm long, 5 cm in diameter, microspore leaves cuneate, 2.5 cm long, apically truncate, densely red or brownish tomentose, slightly retrorse or not retrorse, with curved obtuse tip, anthers 2-5 aggregates. The megasporium is 20-35 cm long, initially tomentose, then gradually falling off, the lower stalk is long, often quadrangular, on each side of the upper part there are 1-3 (mostly 2-3) ovules, 4-8 ovules, the ovules are nearly smooth, half-trapped in the hole when young, the upper top piece is narrowly spatulate or lanceolate, the apex has a subulate tip, and there are several slender short cleft teeth on both sides. Seeds oblate or ovoid, apex sometimes retuse, center slightly convex, 3-4.5 cm in diameter, mesocarp woody, with two ridges. The flowering period is from May to June and the seeds mature in October.

2. Growth habits

Sex likes bright light and is born in a warm, dry and well-ventilated place. Not resistant to cold, slow growth. The soil should be fertile and slightly acidic sandy soil.

3. Geographical distribution

It is cultivated in all parts of South China. Produced in Guangdong, Guangxi, Hainan and southern Yunnan. It is distributed in Indonesia, northern Australia, Vietnam, Myanmar, India and Madagascar in Africa. The type specimens were collected from Indonesia.

4. Reproduction and cultivation

Reproduce by sowing or tillering. The sowing method is collected and stored at the end of autumn and sparsely sown in spring. Deeply covered with soil, it can germinate in 2 weeks under the high temperature of 3033 ℃. It is feasible to transplant after 2-3 years of culture. The tillering method was carried out after the growth stopped in winter and the small buds were cut off from the rhizosphere and cultured. If the bad bud is not easy to sprout, you can cover a flowerpot so that it can not see the sun, and then gradually see the light after the leaves are sent out. The method of burying and inserting is to cut the stem of cycad into thick pieces of 10~15cm and bury them in sandy soil, waiting for new buds to be sent out around them, then they can be planted separately. This method should be careful not to pour water, otherwise it is perishable.