Eucalyptus leaves are sessile and opposite when they are young, and mature leaves are sickle-shaped or rectangular. Eucalyptus leaves are green, thick and smooth, about 15 cm long and about 7 cm wide. Veins are obvious, with the petiole line as the center, and the petiole grows with the size of the leaf.
Eucalyptus leaves are a special food for koalas. Eucalyptus leaf oil contains eucalyptol, which is a colorless or yellowish liquid with irritating and cool fragrance. Mainly used in toothpaste, mouthwash, food and medicine.
Extended data:
Characteristics of Eucalyptus
Eucalyptus, as a tree species introduced from Australia, has several main advantages:
1. Economic advantages: Eucalyptus grows very fast, usually 4-5 meters longer than a year. In the case of superior growth conditions, it can even grow to a height of 10m within one year, which can be said that the speed is very scary, and it is cut in the same year.
The second is to increase timber output and maintain timber safety.
The third is to promote industrial development and increase farmers' income.
Fourth, the forest carbon sink increased and the ecological carrying capacity improved.
Disadvantages of eucalyptus:
1. Eucalyptus is a fast-growing and high-yield forest with large water demand. When planted in soil, the groundwater level will drop, and long-term planting will harden the soil and cause desertification.
Second, eucalyptus needs higher fertilizer. Where eucalyptus is planted, the soil fertility will drop a lot, resulting in the death of the original vegetation due to insufficient nutrients.
Third, eucalyptus itself is non-toxic, but it will release an odor harmful to human body, which is difficult to clean. In addition, it will cause great pollution to water, and it will do some harm to people and poultry after drinking.
With the continuous improvement of people's awareness and concern about environmental issues, people will pay more and more attention to the impact of eucalyptus on the local environment. Therefore, it is necessary to moderately control the planting area of eucalyptus, appropriately plant other tree species and strengthen species diversity.
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