Atasam mai jos o copie din tratatul de crestere a paulowniei a academiei Chineze”.Asta ca sa mai terminam cu minciunile si excrocii de pe internet care va ademenesc cu recoltarea la 3 ani.
CULTIVATION AND UTILIZATION
CHINESE ACADEMY OF
ASIAN NETWORK FOR BIOLOGICAL SCIENCES
INTERNATIONAL DEVELOPMENT RESEARCH CENTRE
1. The significance of developing Paulownia
The genus Paulownia is represented by nine species of fast growing timber trees which are indigenous to China. It is very adaptable, widely distributed and extremely fast growing both in south and north China. Presently, the genus is either naturally distributed or cultivated in 23 provinces, municipalities and autonomous regions. It grows equally well on the plains as well as in mountainous regions up to 2,000 m high. Therefore, the genus provides a great potential for extensive cultivation all over China.
Under normal conditions, a 10-year old Paulownia tree can measure 30-40 cm diameter at breast height (dbh) and will have a timber volume of 0.3-0.5 m3. However, under optimum conditions, they can produce useful timber within five to six years. For instance, in Yinjang County, Szechuan Province an 18-year old P. fortunei tree averages about 21.7 m high, has a dbh of 100.5 cm and has volume of 6.65 m3 of timber, thereby having an annual increment of about 0.37 m3. With this kind of high growth potential the cultivation of Paulownia should alleviate the problem of timber shortage in many of China’s counties.
For example, in Lankau County, Honan Province, Paulownia was planted over a large area from 1963 to 1965 the total area under mixed cultivation had already reached 20,000 hectares. Felling started in 1971 and it yielded almost 148,000 m3 of timber by 1976 for the local people, effectively solving years of timber shortage.
Paulownia is very adaptable and extremely fast growing. Therefore, there is great potential to develop the trees of this genus in China.
The timber is light yet strong, dries easily, has a beautiful grain, does not warp or crack, or deform easily. The wood is easy to work with, and suitable for carving and has excellent insulation properties. It provides suitable wood for the manufacture of furniture, plywood and musical instruments. It also has many other uses. Paulownia has late leaf emergence and leaf fall, and the root system is deep. The branching is sparse and so also the leaf arrangement. For these reasons Paulownia is an exceptionally good tree for intercropping. Intercropping of agricultural crops with Paulownia has thoroughly transformed the agricultural areas on the broad plains in north central China and the central plains into exemplary areas of agroforestry. Intercropping with Paulownia improves the microclimate for crop plants, and the yield increases considerably