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Where are the three major forest areas in China?
Plantation refers to the forest formed by artificial measures. The purpose of plantation management is clear, and afforestation technical measures such as tree species selection and spatial allocation are arranged according to people's requirements.
Its main features are:
(1) the seedlings or other propagation materials used are artificially selected and cultivated, with good genetic quality and strong adaptability;
(2) The age of individual trees is generally the same, and they are evenly distributed in the woodland;
(3) A small number of single trees are used to form a forest, and the group structure is even and reasonable;
(4) The trees grow neatly, and can be unified into a closed state in time; After closing hillsides for afforestation, the degree of individual differentiation is relatively small, and the competition for forest growth is fierce;
⑤ Woodland is under artificial control from the beginning of afforestation, which can meet the needs of forest growth. The plantation area in China is 69.33 million hectares, ranking first in the world. Important plantation tree species are eucalyptus, Sophora rubra, Pinus massoniana, Abies, etc.
Extended data
1. Northeast forest region is the largest natural forest region in China. Mainly distributed in Daxing 'anling, Xiaoxing 'anling and Changbai Mountain. Mainly mixed coniferous and broad-leaved forests in the middle temperate zone. According to statistics in recent years, there are 680 million mu of forests in the whole region, accounting for 37% of the total forest area in China.
The timber storage volume is 3.2 billion cubic meters, accounting for one third of the national timber storage volume. Among them, Heilongjiang Province has 2.4 billion cubic meters, accounting for a quarter of the national timber stock; Jilin Province 700 million cubic meters, Liaoning Province 1 100 million cubic meters.
2. Southwest forest region is the second largest natural forest region in China, mainly including Hengduan mountain region at the border of Sichuan, Yunnan and Tibet, the great bend area of Yarlung Zangbo River, and the southern slope of Himalayas in southeastern Tibet.
Here, the peaks are towering, the valleys are deep, there are surging rivers at the foot of the mountain, and there are springs in the ravine. The height difference between the foot of the mountain and the top of the mountain is great, and the climate changes with the height, so there are many kinds of trees.
Evergreen broad-leaved trees grow under the mountain and everywhere, deciduous broad-leaved trees grow on the mountainside, and conifers grow on it. The main tree species are spruce, fir, alpine oak and Yunnan pine. These trees are also good building materials. There are also precious teak, rosewood and camphor wood. After liberation, Yunnan Province began to plant rubber trees and coffee trees, becoming an important tropical economic forest area in China.
3. Southern forest region
The vast area south of Huaihe River in Qinling Mountains and east of Yunnan-Guizhou Plateau belongs to the southern forest region (southeast forest region), the third largest forest region in China. The climate here is warm, the rainfall is abundant, the plant growth conditions are good, and there are many kinds of trees, mainly Chinese fir and masson pine, as well as bamboo and wood unique to China.
The southern part of this forest area is a treasure house of tropical and subtropical forests in China, and the economic trees are colorful, including rubber forest, Guilin, octagonal forest and eucalyptus. The latter three economic forests are rich in precious medicinal materials and spices.
The forest area of Taiwan Province Province, the treasure island of the motherland, accounts for more than half of the province's land area. Cinnamomum camphora is a specialty of Treasure Island, and camphor can be extracted from its branches and leaves. The output of Cinnamomum camphora in Taiwan Province Province has reached more than 80% of the world's total output, and it is known as the "hometown of Cinnamomum camphora".
Baidu encyclopedia-three major forest areas
Baidu encyclopedia-artificial forest
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