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영어

Masson pine (Pinus massoniana) is a native tree species unique to south China. It has the advantages of fast growth, high yield, strong adaptability and leanness-resistant, and it is an important tree species for timber and rosin. In the aspect of tree breeding, our institute has carried out studies on provenance, genetic variation of forest stand and individual plant at different levels, interaction between provenance and environment, stability and adaptability of provenance, and selected a series of superior varieties suitable for paper making, rosin tapping and insect resistance. In the aspect of forest cultivation, the study on reforming low efficiency stands of masson pine in red soil low hilly areas and the cultivation model of combination of wood and rosin using was carried out. In the aspect of disease and insect control, the method of inducing wood and injecting dry drug and releasing natural enemy insects was developed to control pine wilt disease, and the prevention rate has reached more than 90%. Both of slash pine (Pinus elliottii) and loblolly pine (Pinus taeda) were successful species introduced from abroad, especially the species of slash pine, which is widely planted and promoted in our province. Like the masson pine, slash pine and loblolly pine are both important tree species for timber and rosin with high economic benefits. In our institute, we have carried out research on the breeding of slash pine and loblolly pine building materials, and explored the suitable cultivation mode of building materials. The selection of the improved varieties on high-yield rosin and high-yield wood & rosin of slash pine and loblolly pine was carried out, and the second-generation seed orchard of high-yield rosin was established, and the seed orchard was successfully dwarfed. Since 2015, our institute has introduced more than 100 superior families of slash pine and loblolly pine from the United States, and collected more than 200 high-generation genetic resources of slash pine and loblolly pine from inside and outside the province, and built testing forests from different families and resource collection fields. Research on asexual reproduction techniques of slash pine and loblolly pine such as cutting, grafting and somatic embryo induction has been carried out, and some phased research results have been obtained.