How to plant wild yew and how to grow yew well

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2. Taxus CAM plants are CAM plants Yew inhales carbon dioxide and exhales oxygen 24 hours a day, compared with other plants.

The biggest advantage is that it is suitable for indoor placement, which has the effect of increasing oxygen, and is a natural, environmentally friendly, low-cost and high-quality oxygen bar production equipment.

3. Absorb toxic and harmful gases Yew can not only absorb carbon monoxide, sulfur dioxide and other toxic substances, but also absorb formaldehyde

Carcinogens such as benzene, toluene, and xylene can purify the air and play a role in preventing cancer.

4. Taxyl, which contains anti-cancer substances, is the only species in the world that can be extracted from paclitaxel.

Paclitaxel is internationally recognized as a good drug for cancer treatment, with broad spectrum, low toxicity and high efficiency.

5. The age of the auspicious tree yew can reach more than 5,000 years, called the "longevity tree", it is full of red fruits, crystal clear, meaning auspicious and festive, so it is also called "auspicious tree".

6. Shade-tolerant and temperature-tolerant yew is an excellent potted foliage plant, it likes shade and dampness, avoids sunlight, less watering, excellent maintenance, and still grows well when the temperature is as high as 41 degrees Celsius, and can be slightly long when the temperature is minus 6 degrees Celsius, evergreen in all seasons, beautiful in appearance, and is an evergreen plant suitable for the north and south. 7. Through photosynthesis, yew volatilizes its own odor molecule citronellal, which has the effect of preventing mosquitoes. The higher the temperature, the more incense molecules it plays, the better the mosquito repellent effect, and this kind of fresh and elegant, hot summer is refreshing, refreshing, and refreshing.

It has been authoritatively tested that this fragrance is harmless to humans and animals, and can repel hundreds of mosquitoes.

Yew is a national first-class protected plant and is cultivated in large quantities because it contains paclitaxel, an anti-cancer substance. It is a beautiful plant and is especially suitable as an ornamental bonsai. Yew is also one of the few plants that absorbs carbon dioxide and releases oxygen 24 hours a day, making it an excellent choice for indoor potted plants.

In fact, yew is not difficult to grow, as long as you pay attention to the following five points, you can easily raise yew well!

1. Soil] Yew prefers slightly acidic soil rich in humus, loose and moist and well-drained, and its suitable pH value is between. If you feel that the soil is relatively compact, you must loosen the soil to keep the soil loose and breathable, which is conducive to the growth of the root system. Although yew prefers a moist environment, it is a plant that is afraid of waterlogging, so it is important to keep the outlet at the bottom of the pot drained smoothly and drain excess water in time.

2. Watering] The climate is different in different places, and watering should be made according to the local system. In general, it needs more water during the growing period from March to November, while it needs less water from December to February during the yew dormant period. It is generally 5-7 days in spring and autumn, 3-5 days in summer, and watering once in 7-10 days in winter is fine.

Be sure to water thoroughly every time you water until water seeps out from the bottom of the pot.

In summer and autumn, it is best to water in the morning or evening, while in spring and winter because of the low temperature, it is best to choose to water at noon.

In addition, because the water quality in the north is harder and more alkaline, it is best to use rainwater or fully decomposed and diluted rice water to increase the acidity of the soil.

3. Light] Yew has strong shade tolerance and can grow in the lower layers of the forest in a natural environment. It is best not to put potted yew trees in a place where there is sun all day long, especially at noon, and must not be exposed to the sun. It can be placed in a ventilated place with sunlight in the morning or afternoon.

If it is placed indoors, it is best to place it in a ventilated place with strong scattered light, but it must not be in an air conditioning vent or near a heater, so that the leaves are easy to fall off.

Leave it in the morning sun for two to three hours every week to make the yew grow better, but it's best not to stay outside overnight in winter.

4. Fertilization] Fertilization is only needed in the growth period of yew, and fully decomposed cake fertilizer liquid fertilizer is applied every half a month, and it is used after dilution at 1:10, this liquid fertilizer must not be sprayed directly on the leaves, which is easy to burn the leaves. Remember to water the day after fertilization to prevent root burning.

Some people like to pour leftover tea leaves and water into potted plants, which is not suitable for yew, which contains substances such as theophylline, which not only changes the pH of the soil, but also destroys the organic matter in the soil.

5. Change pots] It is best to change a larger pot once a year, so as to fully meet the needs of yew growth and development. Repotting takes place every year before the sprouts sprout, probably in February or March. Before changing the pot, keep the soil in a semi-dry state, pour out the yew, remove the excess residual roots and bad roots around the periphery, try to keep the soil mass on the original root system, put it into a new pot together, fill the soil and water it once.

Pre-breeding planting method.

The conservation of yew resources and the rapid propagation of seedlings are the basis for the construction of paclitaxel timber forests, and the large-scale construction of yew plantations is the key to solving the problems of paclitaxel raw materials.

When using yew seeds to breed seedlings, it is necessary to pay attention to the storage method of seeds, and to mix sand seeds or control temperature, which has a good effect on germination and breaking dormancy habits after wintering. Before sowing, the seed coat should be rubbed, soaked in warm water, and treated with pesticides and hormones. Shade after emergence is the key to seedling raising.

It can prevent seedlings from burning at high temperature, keep them moist, and the light transmittance is appropriate at 40%. The seedling emergence rate of Taxus chinensis in Northeast China and Taxus chinensis in South China can reach 70 to 80%, and the seedling emergence temperature is required to be higher than 15 degrees.

The dynamic growth of seedlings is as follows: the plant height and stem thickness of seedlings grow slowly in the first two years of emergence, the plant height generally grows about 10cm per year, and the growth accelerates after one year of transplanting. 3 5 years The annual increase can reach 20 30 cm

Tissue culture takes advantage of the totipotency and clonability of plant cells. The young stems, needles, bark, cambium, arils, and embryos of yew plants were used as implants for culture research. （1）.

Excellent varieties of yew, such as the high-quality organs of Taxus northeast (with high paclitaxel content) were selected as explants, and a large number of tissue culture seedlings could be obtained in the laboratory after callus formation, rooting, and seedling bud cluster formation in the inoculation medium. After substrate transplanting, seedling training, and epidemic prevention, it becomes a production seedling. （2）.

The ratio of late to early callus formation of yew varies between different species and different plants of the same species. At the same time, it is related to factors such as explant type, sampling site and collection season, light conditions, and culture medium type. In the induction medium, Taxus northeastern, southern yew and Yunnan yew could form callus.

However, the formation varies depending on the type of yew and the plant. The results showed that a certain degree of hydrolyzed complex protein (Ca) could promote the growth of healed tissues of Taxus chinensis and Taxus chinensis, but the concentration was not conducive to the formation and accumulation of paclitaxel.

When the concentration is greater than 1%, it can promote the healing of the healed tissue and form new growth points, without affecting the accumulation of paclitaxel. After comparison, d is also conducive to the formation of healed tissue, and can also improve the induction rate. The callus in D medium was fresh in color, large and soft, and it was easy to induce callus from Taxus.

However, other media additions, such as cell suspension culture, B5 medium, and charcoal-derived sucrose, can also increase paclitaxel content. However, glucose in high-agricultural sucrose inhibits paclitaxel synthesis. At the same time, galactose has a significant effect on promoting cell growth.

Gibson's research has shown that both suspension culture and induction of callus cell growth and the formation of paclitaxel content are better in dark conditions than in light conditions. No matter what variety and part of tissue culture is used, it is necessary to select the cells with strong proliferative ability in the middle layer (the surface cells contain a large number of starch granules, the center cells are nucleus, and the tubular molecules that are prone to differentiation should appear). This facilitates the formation of cell-to-cell filaments, resulting in the formation of large cell clusters, which facilitates the signaling of small substances between cells.

As a result, the cells of yew exist in the form of cell clusters, produce functional cell bodies, promote the regionalization of cell masses, and the functional differentiation of cells, which is the premise for the production of metabolites by yew.

1. Illumination. It is a masculine tree that requires plenty of light in the growing environment. However, for its seedlings, especially seedlings within 3 years, it needs to shade the environment, and after 3 years, it can gradually see the sun.

2. Soil. Yew soil needs to be slightly acidic loam, and it is very afraid of waterlogging, so its permeability should be strong, and it must have a certain ability to retain water and fertilizer.

3. Moisture. This plant is very afraid of waterlogging, so it is not easy to water too often, and it is necessary to avoid standing water, as long as it can meet its normal growth needs.

Fourth, fertilizer. Yew does not have particularly strict fertilizer requirements, and sufficient fertilizer can make the plant grow robust. Generally, after the dormant period before growth, we can give it a thin Bika water-soluble fertilizer, and change the pot once every two to three years to meet its growth needs.

5. Pruning. We should often prune it moderately, mainly pruning the side branches to keep its top branches, so that it can grow more closely. In addition, the occurrence of pests and diseases is relatively rare, and we can pay less attention to this aspect in general maintenance.