1. Why does bamboo only grow tall and not thick when it grows to a certain length?

Because of the lack of cambium, bamboo grows to a certain length, only grows tall and does not thicken.

This is because bamboo is monocotyledonous and most trees are dicotyledonous. The stem structure of monocotyledons is very different from that of dicotyledons. The main difference is that there is no cambium in the stem of monocotyledonous plants.

If the stems of dicotyledonous plants are sliced and observed under a microscope, vascular bundles can be seen. The outer layer is phloem and the inner layer is xylem, and a thin cambium is sandwiched between phloem and xylem. It is this thin cambium that makes trees grow so thick. The cambium is the most active. It grows in splinter cell every year, producing new phloem and xylem, so the stem is thicker every year.

If the stem of monocotyledonous plants is sliced and observed under a microscope, vascular bundles can also be seen. Similarly, the outer layer is phloem and the inner layer is xylem, but there is no active cambium between phloem and xylem, so the stem of monocotyledonous plants can grow thick only when Dendrobium grows at first, and will not grow thick after a certain degree.

2. Why can't you see bamboo blossom every year?

Because bamboo is a perennial flowering plant, bamboo flowering is a normal natural phenomenon and belongs to a process of bamboo fruiting and reproduction. People in ancient China have observed this phenomenon for a long time. There is a saying in Shan Hai Jing more than 2,000 years ago: "Bamboo bears flowers, and its years will surely wither." Record. It is recorded in Bamboo Spectrum written by Dai Kai in Jin Dynasty: "The medicine must be sixty, and it will take six years." Its annotation is: "Bamboo roots change easily in sixty years, and roots change easily and die easily." However, bamboo mainly reproduces asexually. Every spring, bamboo shoots grow from underground bamboo whips and then develop into new bamboo. The bamboo whip is not its root, but an underground stem. Underground stems can be divided into three types: uniaxial underground stems can continue to grow, with buds on both sides and lateral buds developing into bamboo shoots; Axial terminal buds develop into bamboo shoots, and lateral buds produce new underground stems, which are connected to form axial buds. Underground stems produce dense bamboo stem clusters, which belong to this category. There is also a compound shaft type, which is a mixture of the above two. The sexual reproduction of bamboo, like other flowering plants, first blooms and then bears seeds to complete the whole growth cycle. There are three types of bamboo flowering cycle due to different bamboo species: few bamboos can bloom every year, and bamboo stalks can still grow shoots after flowering; Most bamboos bloom only once in the whole growth process, and there is a certain period, ranging from 40 to 80 years. After flowering, the stems and leaves turn yellow and die, and the underground stems gradually turn black and lose their germination ability. The seeds formed are called bamboo rice, which can grow into new bamboo, arrow bamboo and bamboo after planting. The other is sporadic flowering from time to time. Bamboo forests do not die after flowering, such as Zizhu. Bamboo, Fargesia macrophylla, etc. All belong to the category of regular flowering. This kind of bamboo has a long flowering interval, usually 50-60 years; Some even open once every 100 years. However, no matter which year the bamboo pole grows, as long as the age of the bamboo whip is the same or similar, then the flowering time is roughly the same. Even if the ecological environment is very different, flowers can bloom at the same time on sunny slopes, shady slopes, steep slopes and gentle slopes, with different soils and different altitudes.

use

Bamboo is widely used in agriculture. Bamboo can be made into various farm tools, such as baskets, dustpans, brooms, sun mats and so on. Bamboo joints are used as water pipes for farmland irrigation and water diversion. It is cheap and durable to transport brine with bamboo pipes in Zigong salt area, Sichuan Province. Bamboo poles are stripped of bamboo green and tied into bamboo rafts, which have shallow draft and great buoyancy, and are still the traditional means of transportation in the upper reaches of inland rivers in southern China. In water conservancy projects, bamboo is cut into bamboo, woven into gabions, filled with stones and surrounded by banks, which are widely used in Dujiangyan and other famous water conservancy projects in China. Bamboo is also widely used in fishery production. From simple fishing gear to complex appliances, the fixed brackets and floating objects of aquaculture must be made of bamboo, and the grids, masts, ceilings and fences of fishing boats are also inseparable from bamboo.

In landscaping, the use of bamboo is attracting widespread attention. Guangzhou Fuyun Bamboo Landscaping Engineering Co., Ltd. pioneered the one-stop service of design, construction, maintenance and repurchase of ornamental bamboos for landscaping. Bamboo, though not as handsome as plum, is gorgeous as chrysanthemum, fragrant as orchid and majestic as pine. However, bamboo is noble and guilty, upright and upright, swaying, lovable and praised. The so-called "pine, bamboo and plum" are three friends of cold age and four gentlemen of plum, orchid, chrysanthemum and bamboo, which constitute the characteristics of China gardens. Throughout the ages, people who love bamboo, calligraphy, painting and poetry not only like the shape of bamboo, but also love the connotation of bamboo, and all regard bamboo as a model for being a man. Therefore, people like to plant bamboo around houses, gardens and parks. Gardening enthusiasts use bamboo to make bonsai. There are many kinds of bamboos suitable for bonsai, such as Phoenix Bamboo, Graceful Guanyin Bamboo, Flowering Buddha's Belly Bamboo, Affectionate Bamboo, Odd Lohan Bamboo, Simple Phyllostachys pubescens and so on.

Bamboo shoots are one of the traditional vegetarian varieties of our people. Processing all kinds of fresh bamboo shoots into cans by modern industrial methods can not only meet the needs of people in bamboo-free areas, but also become an important export industry in China. Bamboo shoots contain a variety of amino acids and trace elements. Nutritionists believe that bamboo shoots are natural health food with high fiber content and low fat content, which can promote gastrointestinal digestion and excretion. Eating bamboo shoots regularly can reduce the retention and absorption of harmful substances in the body, and has the effect of preventing cancer and losing weight. High-quality bamboo shoots such as Phyllostachys pubescens are not only delicious and nutritious, but also have high yield. Phyllostachys pubescens and other bamboo species have been widely planted in rural areas.

The bamboo forest is smooth and hard, and the texture is flat. It is an important material for making musical instruments, handicrafts and cultural and sporting goods. Bamboo poles and bamboo handicrafts have become important export commodities. For example, the famous tea poles have been exported for more than 65,438+000 years, mainly used for fishing poles and skiing poles. Bamboo spring carving, bamboo mat, bamboo screen and bamboo bottle are all well-known arts and crafts at home and abroad.

Bamboo grows fast and matures early, and can be used for a long time once it is planted successfully. Moreover, bamboo has lush foliage and developed roots, which has good functions of regulating climate, conserving water, conserving water and soil, preventing soil erosion, preventing wind and reducing disasters, and has played a very good role in maintaining ecological balance and protecting human living environment.

Bamboo industry

The global bamboo industry has developed into an industry closely related to the production and life of about 2.5 billion people, with an annual output value of nearly 5 billion US dollars. Of course, an industry of this scale must be backed by rich natural resources and advanced afforestation and processing technologies. At the same time, there must be scientific and technological research that constantly explores and innovates as its powerful forerunner.

symbolic meaning

In China tradition, bamboo symbolizes the elasticity, longevity, happiness and spiritual truth of life, while in Japan, bamboo is a symbol of truth and dedication. Bamboo is used as a writing tool all over the East. For Buddhist and Taoist literary and art workers, the straight line and hollow structure of bamboo itself has extremely profound symbolic significance. Indigenous tribes in South America use bamboo as knives and axes to cut other things, and also use bamboo to make muskets and musical instruments to play sacred music. Some tall bamboos are respected by people and regarded as trees of life. In China, bamboo is one of the three auspicious plants in winter (the other two are pine trees and plum trees), which is of great significance to literati.

China is the best place to produce bamboo.

1. China is the origin of bamboo plants in the world and one of the modern distribution centers, and is known as "the hometown of bamboo in the world".

2. China is the country with the richest bamboo resources, ranking first in the world in terms of bamboo species, area, accumulation and output, and is known as the "Bamboo Kingdom".

3. China has a long history of cultivating and utilizing bamboo. "The bamboo culture in China has lasted for 5,000 years, and there are bamboo everywhere." Known as "the country of bamboo civilization".

4. China is the country with the highest degree of bamboo intensive management. The total output value of bamboo industry in China has exceeded 20 billion yuan, and it is one of the top ten bamboo towns in China, with an annual output of 5,000 kilograms of bamboo and 3,000 kilograms of fresh bamboo shoots, with an output value of 50,000 yuan per mu.

5. 1997 1 1 China's first intergovernmental international organization, the International Bamboo and Rattan Organization, was formally established in Beijing, with 29 member countries at present.