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What's the use of Sophora japonica? How to plant it?
Sophora japonica has many uses. This paper mainly introduces the garden, economy and medicinal uses.

1. Landscape uses: characteristic tree species commonly used in courtyards in China. Fast growth, hard texture, elasticity, straight texture, easy processing, corrosion resistance, flower buds can be used as dyes, pulp can be used as medicine, seeds can be used as feed and so on. It is also a windbreak and sand fixation, timber and economic forest tree species, and is a good shade tree and street tree species in urban and rural areas. Sophora japonica is one of the traditional tree species in courtyard greening, China, which is full of national feelings. The leaves of Sophora flavescens are peculiar, just like thousands of green butterflies perched on trees, which is a spectacle. It should be planted separately and has strong resistance to harmful gases and smog such as sulfur dioxide, chlorine gas and hydrogen chloride. It is an excellent tree species for urban greening street trees and timber. The cultivated species Sophora japonica is also a good greening tree species. Sophora japonica is native to northern China, and it is a common tree species in North China Plain and Loess Plateau.

2. Economic use: excellent nectar source plants; Extraction of industrial seed oil; The exocarp of Sophora japonica can extract stuffing sugar and so on. Wood is used to build or manufacture farm tools and furniture; It has strong resistance to toxic gases such as sulfur dioxide and chlorine. Sophora japonica has high economic value, its wood is water-resistant and moisture-proof, elastic, and its material is excellent. Its flowers can be used as medicine and pigment, and its seeds can be pressed to make soap. Sophora japonica is a symbol of auspiciousness, happiness and beauty, and it is a tree species that Tianshui urban and rural people like to plant since ancient times.

3. Medicinal value: Sophora japonica is cool and bitter, and has the functions of clearing heat and cooling blood, clearing liver and purging fire, and stopping bleeding. Contains rutin, quercetin, sophoridiol, vitamin A and other substances. Rutin can improve the function of capillaries, maintain the normal resistance of capillaries, and prevent bleeding, hypertension and diabetes caused by excessive fragility and permeability of capillaries. Sophora japonica can stop bleeding and lower blood pressure. Cutting the branches of Sophora japonica into small pieces, frying until the liquid medicine is green, pumping first and then washing hemorrhoids, which has a good therapeutic effect.