2. Medicinal value (1) Eucalyptus is slightly pungent and bitter, and has the functions of expelling wind, relieving fever, inhibiting bacteria, diminishing inflammation, preventing corrosion and relieving itching.
(2) Indications for preventing influenza, epidemic cerebrospinal meningitis, upper respiratory tract infection, pharyngolaryngitis, bronchitis, pneumonia, acute and chronic pyelonephritis, dysentery and filariasis.
(3) Externally treating burn, cellulitis, mastitis, furuncle, erysipelas, skin itching, beriberi, etc.
3. Economic value (1) Wood processing: China has developed technologies such as high-performance eucalyptus reconstituted wood, eucalyptus veneer laminated wood, bamboo-eucalyptus composite material and formaldehyde-free eucalyptus plywood, and the utilization rate of eucalyptus exceeds 90%.
(2) Paper-making raw materials: The average fiber length of eucalyptus is 0.75- 1.30mm, and its color, density and extract ratio are all suitable for pulping. Many large paper mills use eucalyptus to produce kraft paper and printing paper.
(3) Extraction of essential oil: Eucalyptus globulus and Eucalyptus rectus are the main varieties for extracting eucalyptus oil. Eucalyptus leaf oil contains cineole, which is a colorless or yellowish liquid with irritating and cool fragrance. It is mainly used in toothpaste, mouthwash, medicine and so on.
(4) Gold exploration: Scientists discovered trace gold in eucalyptus leaves by using X-rays, which helps people to explore gold in a more environmentally friendly and convenient way.
Second, the distribution range of eucalyptus is 1. Most eucalyptus trees come from Australia, and a few grow in neighboring New Guinea, Indonesia and the Philippines.
2.19th century was introduced to all parts of the world. At present, it has been planted in more than 90 countries and regions, mainly in Oceania.
3. In China, it is distributed in Fujian, Leizhou Peninsula and Sichuan.
Iii. Growing environment 1, born in sunny plains, hillsides and roadsides.
Eucalyptus has a small crown and high light transmittance, which is beneficial to the growth of grass under the tree.
2. Eucalyptus is a water-saving tree species with small crown and small transpiration. Generally, it grows in areas with annual precipitation of 500 mm, and grows well when the annual precipitation exceeds1000 mm.
3. It is suitable for growing in acid red soil, yellow soil and alluvial soil with deep soil layer, and grows well in places with deep soil layer, loose soil layer and good drainage.