Woodland: Woodland refers to the land covered by natural forests, secondary forests and artificial forests. It includes the land occupied by mature forests, young forests and nurseries of various trees such as timber forests, economic forests, firewood forests and protective forests. It does not include the land occupied by orchards, mulberry gardens and tea gardens in agricultural production. The explanation of forest land in the "Forest Law of the People's Republic of China" is: "Forest land includes tree woodland with a canopy density of 0.3 or above, sparse woodland, shrub woodland, logging land, burned land, nursery land and nationally planned forest land." .
According to land use type, forest land refers to the land where trees, bamboos, shrubs, and coastal mangroves grow. It does not include residential green land, as well as road protection and grass protection forests for railways, highways, and rivers and ditches. . Woodland is further divided into six secondary land categories: woodland, shrubland, sparse woodland, immature forest land, trace land and nursery.
Woodland: It is woodland with a continuous area greater than 0.067hm2, a canopy density above 0.20, and forest vegetation attached, including arbor forests, mangroves and bamboo forests.
Sparse woodland: It is woodland with tree species attached, a continuous area greater than 0.067hm2, and a canopy density between 0.10 and 0.19.
Afforestation land without afforestation: refers to forest land that has not yet matured into a forest after artificial afforestation and aerial seeding afforestation, the afforestation effect meets one of the following conditions, the seedlings are evenly distributed, and the canopy has not yet closed but there is hope for afforestation: 1. The survival rate of artificial afforestation is more than 85%, of which the survival rate of afforestation in areas with average annual precipitation below 400mm is more than 70%. Secondly, the number of seedlings grown after aerial seeding afforestation is more than 3000/hm2 or the number of seedlings grown after aerial seeding to control desertification is more than 2500/hm2, and Distributed evenly.
Trace land: After the forest has been logged or damaged by fire, it does not meet the standards of sparse forest land and has not been updated.
Nursery: refers to an area of ??land where seedlings are grown for transplantation or sale.
Arbor: A woody plant with an upright trunk and a height of more than 6 meters is called an arbor. Corresponding to the low shrubs, the tall trees commonly seen are arbors, such as kapok, pine, magnolia, birch, etc. Trees are divided into deciduous trees and evergreen trees according to whether they shed their leaves in winter or the dry season.
Shrubs: Woody plants whose main trunk is not obvious and often have multiple branches at the base are called shrubs, such as roses, dragon boat flowers, azaleas, peonies, etc.
Clump: A gathering of woody plants, mainly bushes.
Canopy density: refers to the degree to which the tree crowns in the forest cover the ground. It is an indicator that reflects the density of the forest stand. It is the ratio of the vertical projection area of ??the forest crown to the forest area, expressed in tenths, and 1 is the total ground coverage. According to the provisions of the Food and Agriculture Organization of the United Nations, a forest with a canopy density of 0.20 or more (0.20 inclusive) (generally 0.20-0.69 is considered moderately closed, and 0.70 or more is densely closed) is forest land, and a forest with a canopy density below 0.20 (exclusive of 0.20) is a sparse forest.