There is no obvious difference between tree species in shelterbelts and other forest species. This is because timber forests and economic forests also have protective effects. Some tree species are multipurpose. Tree species used as shelterbelts can generally be cultivated using functional forests and economic forests. Only wood species for timber trees need to be cultivated for the cultivation of bulk timber products and high timber growth. The economic forest tree species must consider a relatively large number of forest by-products and require high yields of by-products. The protection of forests to cultivate wood and by-products is not the main, mainly ecological environmental benefits. Some afforestation has specific goals. There are farmland shelter forests, road protection forests, soil and water conservation forests, and water conservation forests in the shelter forests, all of which require the selection of tree species with different characteristics. For example, suitable for the creation of fiber forests are eucalyptus, poplar, pine, Japanese larch, acacia, etc.; suitable for the creation of plywood paulownia, poplar, maple, etc.; suitable for use as a farmland shelterbelt paulownia, Poplar, Chigi, etc.; suitable for water and soil conservation forest pine, hedgehog, cockroach, coffin, amorpha and so on. The southwest region is used as a shelter forest tree species, such as Pinus massoniana, Yunnan pine, Simao pine, Cypress, Bashan pine, spruce, alpine pine, redwood, sangzi, and emblica. The economic forest species in Southwest China are: tung tree, camellia, lacquer tree, linden tree, Dalbergia japonica, black wattle, eucommia bark, astragalus, black peony, white wax, star anise, honokiol, tea tree, palm and bamboo. In the past decade or so, the above tree species have done a lot of work on genetic improvement. A number of excellent provenances, pedigrees, and clones have been selected. Afforestation can be selected for suitable varieties in different regions. For example, the tree species currently used for the development of timber forests in this area include: Chinese fir, masson pine, yunnan pine, cypress, pine and eucalyptus. In order to develop multi-tree afforestation, avoid the simplification of afforestation tree species, and develop good afforestation tree species, we also recommend some tree species with promising development as afforestation trials or promotion of afforestation tree species. For example, Liriodendron chinense, Betula platyphylla, Betula platyphylla, paralyzed, etc.; Schima superba, Manglietia, smiling trees. Spruce trees, which are currently used for afforestation, are mainly spruce, redwood, eucalyptus, eucalyptus, etc. Some precious timber species, such as Phoebe bournei, Amaranthus (such as red vertebrae), Maijingshan, Huangshan, etc., through experimental research, will develop afforestation, or planting trees on all sides.
Amino Acids are biologically important organic compounds composed of amine and carboxylic acid functional groups, along with a side-chain specific to each amino acid. With biological significance, amino acids are important in nutrition and are commonly used in Nutritional Supplements, fertilizers, and food technology. Industrial uses include the production of drugs, biodegradable plastics, and chiral catalysts.
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