CCTV News: What can be made from a piece of bamboo? In Hunan, which is rich in bamboo resources, bamboo shoots can be processed into food, bamboo chips can be used as feed, and bamboo roots can be made into handicrafts. By vigorously developing the entire bamboo industry chain, the annual output value of Hunan's bamboo industry exceeded 59 billion yuan last year. Follow the reporter's lens to Taojiang County, which has the largest bamboo forest area in Hunan.

Now is the harvest season for winter bamboo shoots. In Taojiang County, villagers go to the mountains to dig winter bamboo shoots every morning. Bamboo farmers said that in the past, people "valued bamboo over bamboo shoots" and only earned some income from selling bamboo every year. In recent years, the local area has continuously optimized the bamboo forest resource structure, guiding villagers to dig winter bamboo shoots in winter and spring bamboo shoots in summer.

The reporter learned during the investigation that most of the original bamboo forest resources in Taojiang are southern bamboo forests with a single variety. The local villagers have organized experimental introduction and cultivation of thunder bamboo forests. At present, more than 20 bamboo varieties have been cultivated, including thunder bamboo, yellow pole bamboo, and water bamboo.

At present, most of the 115 acres of bamboo forests in Taojiang County have been contracted to households. All the bamboo shoots dug by the farmers are transported to the bamboo shoot processing enterprises by the village collective. The reporter came to a bamboo shoot processing workshop, and there was a fiery scene inside. The company uses the quick-frozen freshness locking technology of the modern food industry to allow consumers to eat fresh bamboo shoots all year round.

In Taojiang County, there are more than 30 bamboo shoot processing companies like this. The local intensive processing capacity of bamboo shoots has reached 200 million kilograms per year, which can basically realize the purchase of all winter and spring bamboo shoots from farmers.

In order to maximize the value of the bamboo forest, Taojiang County has also tried the "enterprise + base + farmer" model, through comprehensive planting and breeding models such as planting fungi, Chinese medicinal materials and raising native chickens under the bamboo forest to crack the bamboo forest The problem of low operating efficiency.

In Taojiang County, in addition to being made into knives, forks and other tableware, a piece of Nanzhu is also used in bamboo chips made from bamboo branches and leaves. At this biotech company, workers are turning bamboo chips into feed for animals.

With the integrated development of primary, secondary and tertiary industries, many previously abandoned bamboo gardens have been reused. Taojiang people who once worked abroad began to return to their hometowns and devote themselves to entrepreneurship in the bamboo industry.

One Bamboo Changes More than 4,000 Enterprises "String Beads into a Chain"

Not only fully explore the value of bamboo, but also use it in all aspects of life. Hunan has also made great efforts on the production side. Utilize the characteristics of bamboo to make various environmentally friendly materials.

The three-story building in front of you is currently the largest single modern building with an all-bamboo structure in China. It has a total construction area of ​​nearly 1,500 square meters and is supported by 21 solid all-bamboo columns up to 12 meters long.

Researchers involved in the construction told reporters that ordinary fast-growing forest wood requires a growth cycle of at least 10 to 15 years. A piece of bamboo can become useful in 3 to 5 years. It can be used for afforestation, selective felling every year, or even sustainable use. It is also a high-quality biodegradable and environmentally friendly material.

After five years of attempts, the R&D team overcame the technical problems one by one. Today, bamboo architecture is gaining more and more recognition. Scenic spots and B&Bs from all over the country have come to Taojiang County to actively connect with them. The local government is also cooperating with relevant design institutes to promote the formulation of local standards for bamboo prefabricated buildings.

Today, there are more than 4,000 registered bamboo companies in Hunan Province, which have developed more than 400 products in 17 categories such as bamboo charcoal and bamboo powder. An industrial chain of bamboo integrated carriage panels has been formed in southwestern Hunan, with exports The United States and other countries; bamboo skateboards produced in southern Hunan account for 40% of the country's market share; the Dongting Lake area has given birth to the country's largest bamboo shoot production and processing base and distribution center. The output value of the bamboo industry in 39 counties and cities exceeded 100 million yuan, forming an industrial cluster with an output value of more than 59 billion yuan.

Cross-border innovation bamboo transforms into new materials

Not only is it booming in traditional fields, this year, Hunan has allocated 66 million yuan in special funds to support scientific research and other projects to accelerate the innovative development of the bamboo industry. In Yueyang, after a series of technological processes, bamboo is made into hard carbon anode material for manufacturing new energy batteries.

The black powder in front of you is hard carbon negative electrode material made from bamboo, which is also an important component of sodium-ion batteries.

Scientific researchers told reporters that with the rapid development of the new energy industry, the market demand for sodium-ion batteries has increased significantly. Hunan is rich in bamboo, so they are thinking about using environmentally friendly and renewable bamboo to increase the storage capacity and cycle life of sodium-ion batteries.

At first, the researchers planned to purchase raw bamboo for processing, but later discovered that bamboo factories would produce a large amount of bamboo chips and bamboo scraps during the processing, which would be used as raw materials at a lower cost, so they changed their thinking. Use waste scraps directly to make products.

After determining the raw materials, the researchers spent 2 months of continuous research. After repeated exploration, the most suitable conditions and parameters were finally found, and the hard carbon samples produced passed the performance verification of the battery company.