Pollution-resistant evergreen broad-leaved tree-privet

Privet belongs to Oleaceae. Ligustrum lucidum belongs to evergreen trees. First, habitual privet originates from China and Japan, likes light, can endure shade, likes warm and humid climate, is suitable for slightly acidic to slightly alkaline or calcareous soil, can also grow in clayey soil with 0.2% salt content, can withstand low temperature of-12 ℃, is not resistant to barren, deep roots, developed whisker roots, fast growth, strong sprouting ability, and resistance to pruning. It is not strict about climate, but it is suitable to be planted in humid, leeward and sunny places, especially in deep, fertile and humus-rich soils. Ligustrum lucidum can resist sulfur dioxide and hydrogen fluoride, has a certain resistance to chlorine, and can absorb lead. It also has a strong ability to absorb dust, which can absorb 6.3 grams of dust per square meter. 2. Propagation and seedling 1. Seed collection: privet blossoms from June to July, seeds mature from November to December, and the pericarp is black when mature, so it should be harvested at the right time. The fruit does not fall off itself after ripening. The ear can be cut with high branches, the fruit can be plucked, soaked in water, peeled, washed and dried in the shade. If it is not sowed immediately, it can be bagged and stored dry or stored with 2 parts of wet sand and 1 part of seed. 2. Seedling raising: Ligustrum lucidum can be raised by sowing and cutting, but sowing is more common. (1) sowing seedlings from the first and middle of March to April, the soil in the nursery should be loose and fertile. Soak the peeled seeds in warm water for a day or two before sowing, then sow, strip sow or sow. The row spacing of strip sowing is 20 cm, the soil cover is 1.5 to 2 cm, and the sowing amount is 7 kg per mu. Because the emergence time of privet seedlings is longer, about one month, grass should be covered on the bed to preserve soil moisture after sowing. The seedlings should be weeded in time after they are unearthed, and the seedlings should be 5 cm high. Young seedlings are afraid of waterlogging and should pay attention to drainage, but they should also be irrigated when they are too dry. According to the routine management of topdressing once or twice, weeding once a month. The height of one-year-old seedlings can be up to 50 cm. If you cultivate large seedlings, you need to change beds and come out of the nursery after 2 to 4 years. (2) cutting seedlings can be cut and buried in spring in November, and the cuttings can be taken out in February and March of the following spring. The cuttings are 0.3 to 0.4 cm in diameter, about 15 to 18 cm in length, with a flat upper end, an oblique mouth at the lower end, and one or two leaves left at the upper end. The cuttings are inserted into the soil at a distance of 10 cm, rooting about 2 months after cutting, and the seedlings are as high as 70 to 90 cm in the same year. Third, the application of privet is an excellent green tree species, can be used as a street tree or garden tree, can also be used as a hedge. Its crown is round and graceful, the leaves are beautiful, evergreen all the year round, and the leaves are still green in winter in the south. It has strong adaptability and strong resistance to many kinds of toxic gases, so it can be used as a pollution-resistant tree species in industrial and mining areas. In addition, the blade is large and has a strong ability to block dust, which can purify the air and improve the air quality.