Lose of excellent genes will be less if the time for production application of the artificial-crossing Paulownia is shorter, otherwise are more. Shan Tong is a new artificial-crossing type Paulownia studied out in this century, which is called a new generation of fine variety of the artificial-crossing Paulownia. It is proved in production practice that the artificial commodity forest built by Shan Tong under the same site conditions and technical measures will be benefited with low rate and lessened harm of disease and insect, quickened growth rate, shorter cutting period, improved timber properties and larger timber output.
In addition, owing to strong adaptability to natural conditions of the trees, fewer times of management are required in the whole process of building Paulownia forest, which brought higher economic efficiency by saving a huge amount of manpower and resources, reducing the whole afforestation cost and harvesting more quality timber in a shorter period.
As a result, in the current production of Paulownia here in China, wild-type Paulownia species are no longer applied anymore; old generation of artificial-crossing-type Paulownia, whose excellent genes having lost too much due to long production period, is stepping down from the stage of history; positive selection and introduction of a new generation of artificial-crossing type Paulownia has gradually become the mainstream of Paulownia cultivation in all parts of China.
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