Has anyone heard of acacia? What is it like?

During the Warring States Period, King Kang of Song occupied Han Ping's wife, so Han Ping and his wife both fell in love. Kang Wang was very angry and ordered them to be buried separately. Ten days later, a big tree grew on each grave, with branches and roots embracing each other. In order to commemorate this loyal love, people call this tree Acacia.

At present, there are 1200 kinds of acacia trees in the world. Except Europe and Antarctica, it is distributed in all continents, among which there are more than 800 species in Australia, followed by 150 species in Asia, and only one species in China is Acacia formosana. At present, acacia trees planted in China are all imported from abroad and belong to the third-class protected plants. Most of them grow in the south of the Yangtze River and are widely distributed. Acacia branches and leaves are meticulous and close, like clouds of green, and golden flowers are like clouds in the afterglow of sunset. In fact, acacia not only has a gorgeous appearance, but also has a very hard wood grain, which is often used to make all kinds of furniture, plywood and railway sleepers, and can also be used to make paper. In addition, the bark of acacia can extract tannin extract, and the leaves can be used as feed. Roots can be used as dyes, which is a rare excellent tree species with economic and ecological benefits.

Acacia grows fast and has strong adaptability, and can grow normally in various environments. In addition, planting this tree for a long time can improve soil conditions. Therefore, there is a local saying: "It is good to plant eucalyptus, but it is bad to plant acacia." These leaves decompose to form humus, which is the nutrient in the soil. After the decomposition of litter, the soil fertility is increased, so its soil improvement performance is particularly good. Another good feature of acacia is that it has nodules, which can fix nitrogen in the air and form nutrients, which is very beneficial to increase soil fertility.

Acacia is very adaptable and can grow in all kinds of environments. It also has the ability of nitrogen fixation, and it can make its own fertilizer, which has a very strong effect on improving green space. In fact, the most important thing is that it is versatile.

Acacia acacia can be used as building, furniture, shipbuilding, pulp, wood-based panels and other materials because of its solid and hard material, friction resistance and easy processing.

The wood of acacia is pink, very beautiful, fine in material, straight in texture and good in toughness. This is a good furniture material. It can also be used as handicrafts and fine wood products. It is the main raw material of man-made board and fiberboard. The buds of acacia can be used to treat falls and injuries, and the roots can also be used as dyes. This is the best firewood. Most people have had the experience of barbecue. People who are used to modern urban life always buy a pack of charcoal to make a fire when they barbecue, in addition to preparing a lot of food. Speaking of charcoal, I'm afraid it's acacia charcoal. Robinia pseudoacacia charcoal is a kind of high-grade charcoal with good quality, which not only has high calorific value, but also does not produce oil, and the smoke emitted will not irritate the eyes. Older friends, when they were young, had a big stove at home and had to burn firewood to cook. Yes, they are very experienced. If you burn wood directly, or use secondary charcoal, the smell of smoke in the room is often sufficient, and your nose irritates your eyes. It's really a snot and a tear to set fire. In the era when gas and electricity were not so popular, the demand for firewood was really great. In early years, charcoal was even distributed directly as part of "salary", and the word "salary" really came from itself.

The propagation of acacia usually adopts sexual reproduction, and its seeds have a hard waxy layer on the surface. It is with this layer of wax that the seeds of acacia can still germinate after being preserved for more than 40 years. But it is precisely because of this layer of wax that its seeds are difficult to germinate, so if it is propagated with seeds, special treatment must be carried out before sowing. Q: Because the wax layer on the seed skin is thick, it should be broken first. After the seeds are brought, they should be boiled with water above 90 degrees. After cooking, the seeds should be put in a bucket and washed directly with boiling water. When it cools naturally, it needs to be changed, soaked in cold water for 12 hours, and then fished up. If the remaining seeds are not exposed, take them directly to order. The nutrient soil in the nutrient cup for sowing generally accounts for 50% of yellow soil, 35% of burnt soil, 65,438+00% of organic fertilizer and 5% of superphosphate or calcium magnesium phosphorus. Only one seed can be planted in each nutrition cup. In another week or so, the seeds will break out of the ground, and when the seedlings grow to the height of 15-25 cm, they can go out for afforestation. The quality of seedlings directly affects the survival rate of afforestation and the uniformity of forest after timber. Therefore, the seedlings used for afforestation must be qualified seedlings, that is, the height is above 15cm, the ground diameter is above 0.3cm, and there must be at least three seedlings from Ye Jia. In addition, hardening seedlings and spraying drugs 20-30 days before afforestation can ensure the survival rate of afforestation. Although acacia has low requirements for soil, it grows best on moist and loose slightly acidic and neutral loam or sandy loam below 350 meters above sea level. Generally speaking, the land should be sorted out in winter before afforestation. Only in this way can the soil be fully weathered and more nutritious. Before planting Robinia pseudoacacia, 10 day, apply sufficient base fertilizer, compound fertilizer 100 g per hole or 500 g phosphate fertilizer, and plant about 83 plants per mu. Acacia is a fast-growing tropical evergreen tree species, which needs a high temperature and high humidity environment. If it can't meet its demand, it can't show its rapid growth characteristics well. Therefore, afforestation is generally selected in the rainy season, preferably from early March to mid-April. Because the temperature rises gradually during this period, it is very beneficial to the recovery and growth of acacia seedlings after transplantation. Because acacia grows rapidly, it can be closed for afforestation after 1 ~ 2 years. Usually, the tending management of Robinia pseudoacacia is mainly carried out in the year of afforestation. More than two times full shovel tending, must keep the forest clean, no grass, shrubs, vines. The first time was in May-June and the second time was in August-September. When tending, the seedlings should not be skewed to reduce the phenomenon of multiple plants in one ridge after forest formation.

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