How to divide male and female trees into Northeast yew trees?

The method of separating male and female yew is as follows:

1. The leaves of the yew mother tree are shorter and darker than those of the male tree.

2. The female yew germinates earlier than the male.

3. It is obvious that the flower buds must be male trees, which begin to bulge in July and are more obvious in October, and bloom and pollinate in February and March of the next year, with pollen. The flower buds of the mother tree are very small, and only a small droplet of water can be seen when it blooms, and there is no pollen, and small green beans can be seen in April after successful pollination. In the case of close observation of the male and female, you can roughly see the difference.

4. Male trees only bloom but do not bear fruit, and female trees need to be pollinated every year to bear fruit, once a year.

Yew is an evergreen tree with branchlets that turn yellow-green or pale reddish-brown in autumn, with striped, dioecious leaves and oblate seeds. The seeds are used to extract oil and can also be used as medicine. Yew is a shallow-rooted plant with inconspicuous taproot and well-developed lateral roots, with a height of 30 m and a dry diameter of up to 1 m.

The leaves are helical alternate, changing to 2 rows at the base, the bars are slightly tortuous, 1 long5cm, width 25mm, the leaf margin is slightly recurved, the leaf end is acute, there are 2 wide yellow-green or gray-green stomatal bands on the leaf back, there are small convex spots densely growing on the midrib, the green belt on the leaf margin is very narrow, dioecious, the male cones are solitary in the leaf axils, the ovules of the female cones are solitary at the top of the lateral short axis in the upper part of the flower axis, and there is a disc-shaped aril at the base.

The seeds are oblate-oval, with 2 ribs, the seeds are oval, the aril is cup-shaped, red. The biological characteristics of yew have high requirements for the ecological environment, and it takes 100 250 years to grow as a mature tree. Statistics from 1996 show that wild yew trees in Yunnan accounted for 55% of the country's total, of which 1.1 million trees survived in Lijiang.

Yew is a perennial evergreen tree with a huge biomass of 10 points and a short growth time. Its taproot is not obvious, the lateral roots are developed, the branches and leaves are lush, the germination is strong, the cold tolerance is low, and the ability is 25 low temperatures. It can be cultivated in most parts of the country.

The growth is fast, the annual growth is measured at 40 50cm, and the highest can be 60 70cm, which is 300 700% of the growth of domestic yew (Chinese yew, Yunnan yew, etc.). The biomass accumulation of 3 4 years is 600 800 plants/year, and the fresh raw materials produced at 5 years can be used to refine paclitaxel. In the following year, new branches and leaves can germinate, and their biomass is greater than that harvested in the first year.

Wild yew grows under harsh conditions, with a narrow growing area and strict climatic conditions, so why can there be such a lush growing community in the Ruyuan Mountains? According to Mo Yibin, a local expert who has studied and protected the tree species for many years, the unique geographical location, humid climate, good ecological environment, and vigorous protection of the local public are indispensable. Daqiao Town belongs to the alpine limestone mountainous area, the average altitude is more than 800 meters, the temperature difference between day and night is 7, the average temperature of the whole year is only 17, the climate humidity in spring and summer is large, which is very suitable for the growth of yew.

Yew is suitable for planting in all parts of the north and south, has the characteristics of shade-loving, drought tolerant and cold-resistant, requires the soil pH value to be in, can be interplanted with other tree species or orchards, and is easy to manage, among which the Northeast yew, it is an ancient tree species left by the glacier of the 4th period, under the despicable climatic conditions, the tenacious vitality has made it live on the earth for more than 2.5 million years. It not only has well-developed lateral roots, lush branches and leaves, strong germination ability, but also adapts to a wide range of climates, has wide requirements for soil quality, and is resistant to pruning, cold, diseases and pests. And can grow into tall trees, some single plants can even grow for thousands of years, can be used as medicinal varieties, can also be used as greening varieties, Northeast yew in folklore, known as "Feng Shui God Tree" said.

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Different varieties of yew have different cold tolerances. Southern yew is not hardy, and when the minimum temperature reaches about minus 10 degrees, it may suffer from frostbite or freeze to death. To maintain southern yew, it is best to keep the minimum temperature above freezing in winter, so that there is no frost.

Northeast yew is very cold-tolerant, and it is basically ignored in winter, and the possibility of frostbite freezing to death is very small. But if your Northeast yew seedlings are weak and have poor resistance, it is best to keep them in a warmer place. Mandia yew can withstand a minimum of about minus 20 degrees Celsius, as long as the location is not very cold in winter, it can be raised in the open for winter.

The cold hardiness of Yunnan yew is a little poor, and it is recommended to maintain it in an environment above minus 10 degrees for winter. If the yew is potted, no matter what the species is, it is best to keep it in a warmer environment if you want to grow in winter, so that it can maintain its growth, and if the temperature is too low, the yew will enter dormancy and stop growing. Whether it is in the south or the north, the maintenance of yew in winter should have sufficient light, so that photosynthesis can be fully carried out and normal growth needs to be maintained.

Leaves tend to fall off when there is not enough light in unheated areas, and they may grow long when there is not enough light in heated areas. Adequate light also makes yew branches strong.

Increases resistance and is not easy to get sick. Long-term ** various specifications of Northeast yew cuttings seedlings [land seedlings] seed seedling, cuttings, yew seeds, branches, etc., the best quality, **the lowest, provide [keepalive technology] responsible for delivery. The formalities are complete, Jilin Tonghua, Mr. Bai.

Yes, yew.

In dioecious plants, there are female and male plants, and the male tree must pollinate the female tree to bear fruit.

<> red chiqi yew female tree fruiting.

The specific basis is as follows:

Yew. Taxus (scientific name: taxuslinn): The plants are all evergreen trees.

or shrubs, dioecious, cross-pollinated. The bulbs are small, solitary in the leaf axils and bloom in early spring. The male cones are sessile, scaly inflorescences with stamens 6-14 and shields, and each stamens has anthers.

4-9 pcs; The female has a parietal ovule, the base is supported by a disc-shaped bead, and the lower part has bracts.

Several. The seeds are nutty, spherical, and born in a red, fleshy cup-shaped aril, ripe in the same year. There are about 11 species in this genus, the leaves are evergreen, dark green, and the aril is fleshy red, which is quite beautiful, and is an excellent ornamental shrub that can be used as a garden tree.

And often used for Christmas wreaths. The sapwood of this genus is narrow, distinct from the heartwood, without resin channels and resin cells, uniform texture, fine structure, high hardness, strong anti-corrosion and strong toughness. It is an excellent material for buildings, bridges, furniture, equipment and so on.

Because it is the only plant of this genus in the world, it can be used to synthesize the anti-cancer drug paclitaxel.

paclitaxel，taxol）。It is found in the northern hemisphere.

temperate to tropical.

dioecious, the bulb flower is born in the leaf axils of the previous year's branches, the male bulb flower has 9 14 stamens, the female ball flower has an ovule, ovule, pale red, straight.

The former one is a male flower, and the latter one is a female flower.

In the process of yew planting, water-soluble fertilizer can be appropriately applied to supplement nutrients.

Summary. 1. The male flowers of yew are spherical, with short peduncles, light brownish yellow to yellow, 5 6 mm long, and about 3 mm in diameter.

2. densely borne in the leaf axils on both sides of the branch, stamens 6 14, shield-shaped, each stamens have 5 (4 9) anthers.

3. Female flowers nearly spherical, sessile, 5 6 mm in diameter, bead tray disc-shaped, sparse solitary branchlets dorsal leaf axils.

4. Mandia yew, the seedling distinction within two years depends on experience.

5. Seedlings of more than two years have flower buds from July, and those that bloom in March of the next year must be male, the male tree flower buds are relatively large and obvious, and the flower buds are round.

6. The flower buds of the mother tree are very small, and there are small water droplets on them when they bloom in March, and the leaves of the mother tree are short and thick and dark in color compared with the male tree.

7. The growth rate of the female tree is slower than that of the male, and judging the male and female on the leaves is also a method, which needs to be seen more.

How to divide male and female yew from branches.

There are two main ways to distinguish male and female from yew. The first one: the growth position is different, for example, the male stamen grows in the leaf axils, while the female stamens grow in the upper part of the flower axis; The second:

The morphology is different, usually the female stamen has a rock hand ovule, the ovule is ovate, and the color is pale red.

How to divide the one that did not bloom from the branches.

1. The male flowers of yew are spherical, with short peduncles, light brown yellow to yellow, 5 6 mm long, about densely born in the leaf axils on both sides of the branch, stamens 6 14, shield-shaped, and each stamens have 5 (4 9) anthers. 3. Female flowers nearly spherical, sessile, 5 6 mm in diameter, bead tray disc-shaped, sparse solitary branchlets dorsal leaf axils. 4. Mandia yew, the seedling distinction within two years depends on experience.

5. Seedlings of more than two years have flower buds from July, and those that bloom in March of the next year must be male, the male tree flower buds are relatively large and obvious, and the flower buds are round. 6. The flower buds of the mother tree are very small, and there are small rotten water droplets on them when they bloom in March, and the leaves of the mother tree are short and thick compared with the male tree, and the color is dark. 7. The growth rate of the female tree is slower than that of the male, and the hungry leaves are also a method to judge the male and female, which needs to be seen more.