Despite the native broad-leaved tree species are rich in Guangxi, there still exists the singleness of tree species, big differences in stand growth and other problems. There are 8 broad-leaved tree species planted in the demonstration forest, including Michelia macclurei, Castanopsis hystrix, Betula alnoides, Mytilaria laosensis, Manglietia glauca, Michelia hedyosperma, Tsoongiodendron odorum and Paramichelia baillonii, and 2 coniferous tree species, including Pinus massoniana and Chinese fir. Through 6 mixed plantation modes, including the mixture of the coniferous and broad-leaved, and the mixture of broad-leaved and broad-leaved, and by planting in rows, the Center breeds the large-diameter timber of the rare broad-leaved trees with a diameter over 50cm, the medium and large diameter timber of Pinus massoniana and the small and medium diameter timber of Chinese fir with a diameter ranging 15 ~ 20cm , adopting the single plant management working system for the target trees.
Multi-species mixed plantation is conducive to the maintenance and upgrading of site productivity, promotes the formation of good stem form, thus ultimately enhances the overall economic value of the stand and achieves sustainable management using natural regeneration. At last, a large area of close-to-nature forests consisting of several precious species comes into being by the transmission of seeds between different modes and the natural regeneration of the seedlings under forest. (Experimental Center of Tropical Forestry)
Multi-species mixed forest of rare and excellent local tree species
Aerial view of coniferous and broad-leaved multi-species even aged mixed forest
Even aged mixed forest of Tsoongiodendron odorum and Chinese fir (4 years)
Even aged mixed forest of Betula alnoides and Castanopsis hystrix (4 years)
Even aged mixed forest of Castanopsis hystrix and Pinus massoniana (4 years)