The yew at home was doing well at first~ but recently it has begun to languish. All the leaves have drooped down, and a white thing has appeared on the branches. This

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Yew is a shallow-rooted plant with an inconspicuous main root and well-developed lateral roots. It is recognized as an endangered natural rare anti-cancer plant in the world. It is an ancient tree species left behind by the Quaternary glaciers. The earth has a history of 2.5 million years. Due to the slow growth rate and poor regeneration ability of yew under natural conditions, there has not been a large-scale yew raw material forest base around the world for a long time. China has classified it as a first-class rare and endangered plant, and the United Nations has also banned logging.

It likes a moist environment and a warm and humid climate. It is not only drought-resistant and cold-resistant, resistant to pests and diseases, has strong germination ability, slow growth, and long life, but its biological characteristics have high requirements on the ecological environment. ,

The growing conditions of wild yew are almost harsh, the growing area is narrow, and it has strict requirements on climatic conditions. Why can there be such a lush growth community in the Ruyuan Mountains? According to Mo Yibin, a local expert who has studied and protected this tree species for many years, the unique geographical environment, humid climate, good ecological environment, and the vigorous protection of the local people are all indispensable. Daqiao Town is an alpine limestone mountainous area with an average altitude of more than 800 meters. The temperature difference between day and night reaches 7°C. The average temperature throughout the year is only 17°C. The climate is relatively humid in spring and summer, which is very suitable for the growth of yew.

Yew is suitable for planting in all parts of the north and south of my country. It is shade-loving, drought-tolerant, and cold-resistant. It requires a soil pH value of 55 to 70. It can be interplanted with other tree species or orchards and is easy to manage. Among them Northeastern yew is an ancient tree species left behind by Quaternary glaciers. Under harsh climatic conditions, its tenacious vitality has allowed it to live on the earth for more than 2.5 million years. It not only has well-developed lateral roots, luxuriant branches and leaves, and strong germination ability, but also adapts to a wide range of climates and soil requirements. It is also resistant to pruning, cold, and pests and diseases. And it can grow into tall trees, and some single trees can even grow for thousands of years. It can be used as both a medicinal species and a greening species. In folklore, Northeast yew is known as the "Feng Shui God Tree" called.

Yew is an evergreen tree with reddish-brown bark and shallow longitudinal lobes. The leaves are slightly curved and sickle-shaped. The leaves are dark green and have two gray-green stomata. Dioecious, with flat oval seeds and solitary cones. It blooms from March to April and matures in November

Yew is mostly propagated by seeds. The seeds can be harvested when they are mature in November. Afterwards, the fleshy seed coats are cleaned and dried, and then buried in layers of wet sand in a dry place in the shade, covered with plastic film and straw curtains. In summer

Seeds should be turned twice a month in summer and autumn, and seedlings can be sown and raised in early March of the following year. The seedbed should be a leeward and well-drained plot of slightly acidic sandy soil. The bed width is 1 meter and the ditch width is 40 cm. There are high ridges rising from east to west, and steel plates 25 cm high and 4 cm thick are buried on both sides of the ridges. , 10 cm deep. The bed soil needs to be deeply plowed and carefully cultivated, and carbofuran should be applied to prevent underground insect pests. Use one part each of vermiculite, river sand, peat, and garden soil, and add fungicides such as carbendazim or thiophanate-methyl. Mix the matrix into a matrix and fill it into the steel plate, leveling it with the side plate. 3 to 5 cm higher. Cover with plastic film, seal and fumigate for 3 to 5 days before sowing. Spread the seeds evenly on the bed surface, with a seeding rate of about 200 seeds per square meter.

After sowing, use a wooden board to flatten it slightly, cover it with 1 to 2 cm thick mixed matrix soil, and cover it with straw curtains or plastic films. Insulates and moisturizes. In case of dry weather, water should be sprayed appropriately. Generally, seedlings can germinate after 40 days. At this time, the plastic film or straw curtain should be removed,

and a 2-meter-high shade shed should be erected above the seedbed, and covered with a shade net to prevent direct sunlight. Keep the seedbed moist. On rainy days, a low shed should be built and covered with plastic film to prevent excessive moisture in the seedbed. Do a good job in drainage and ventilation of the seedbed, and timely prevent

treat diseases and insect pests. During the seedling stage, apply decomposed light cake fertilizer and water every 10 days. Avoid using chemical fertilizers and concentrated fertilizers. After a year of careful maintenance and management, the seedlings can reach a height of 15 to 25 centimeters and have 2 to 3 forked branches. Transplantation can

be performed in early April. The planting site should be leeward, dry, slightly acidic sandy soil rich in humus, plow 20 centimeters deep, and apply 5 kilograms of decomposed organic fertilizer per square meter. Raise high ridges and dig deep ditches, with the ridge width being 100 cm and the ditch width being 30 cm

m. Plant 5 rows per row, with a row spacing of 20 cm and a plant spacing of 15 cm. Transplantation should be done on a cloudy day, and should be planted as the transplant progresses. It is necessary to transplant with soil balls. Immediately after transplanting, water it thoroughly and set up a 2-meter-high shade shed on it. Cover it with a shade net on sunny days. It can be removed on rainy days and at night. Strengthen fertilizer and water management during the growth period. Generally, apply decomposed cake fertilizer and water every 10 days. Carry out pest control and management. In summer, the shading and cooling work should be strengthened, and water spraying should be used to cool down when necessary to create a cool and humid environment that is conducive to the growth of seedlings. Yew is not only a high-quality material for making high-end furniture, but also a medicinal material with great medical value. It is also an excellent tree species for landscaping. With the maturity and development of its artificial propagation and artificial cultivation technology, The application range of yew will be wider.

Pots

Yew

The best soil for planting yew

is loam, but you can also choose peat soil, perlite, etc. Mixed with loam soil. Water retention, fertilizer retention and ventilation are beneficial to the growth of yew.

Although clay retains water and fertilizer, it is not breathable and is not conducive to the growth and development of the yew

root system. Although sandy soil is breathable, it has poor fertilizer and water retention properties and is not conducive to the growth of yew. The best light for yew is from 7 to 11 a.m. every day, with about 4 hours of light every day. The light time is shorter in summer, and the light time can be longer in autumn and spring. But the lack of light also affects the photosynthesis and growth of yew.

Yew stem rot is one of the most serious diseases that harms yew cuttings during the growth period. Two months after the yew cuttings were taken, the base of the stems of the cuttings (the junction between the underground and above-ground parts of the cuttings)

Stem rot occurred one after another, starting with individual plants and then spreading to the entire cluster, resulting in ear strips Leaves become chlorotic, die and fall off. Since the disease mainly occurs in the high-temperature seasons of summer and autumn, cutting seedlings are damaged by high soil temperatures, which provides conditions for the invasion of pathogens. The occurrence and prevalence of the disease mainly depends on the temperature from July to August. If The onset of disease is early, and the seedlings have weak heat resistance, and the disease is severe.

Preventive and control measures

1. Reduce the surface temperature of the seedbed soil in summer and autumn to prevent burning the base of the seedling stems, so as to avoid causing wounds and causing the invasion of pathogens;

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