Betula alnoides is a tree species of the genus Betula, in the family Betulaceae. It is heliophilous, drought tolerant, and has strong adaptability to barren soil. With the fast-growing and high-yielding features, it is regarded as the pioneer species for afforestation in the barren hills. Due to the sparse branches and leaves and the seasonal defoliation, the Betula alnoides pure forest is overgrown with the heliophilous shrubs and weeds, which greatly influences the growth of the trees, eventually resulting in poor growth of the forest. Castanopsis hystrix is a tall and straight species of evergreen broad-leaved tree with thick and dense branches and leaves. The species has a wider ecological niche and is shade tolerant at juvenile stage.

By planting Castanopsis hystrix under the canopy of the young Betula alnoides, we can make full use of the light resources and nutrient space of the forest land to create an artificial uneven aged broad-leaved mixed forest with high yield and good stability, so that the Betula alnoides pure forest can be refrained from poor growth, low quality and yield. 

The scientific and technical personnel of Experimental Center of Tropical Forestry chose to plant the tree species with strong complementarity based on their differences in ecological niche, to create the uneven aged mixed forest with scientific structure and high productivity, which provided technical demonstration for tending the artificial forest of local rare broad-leaved large-diameter timber. (Experimental Center of Tropical Forestry)


Betula alnoides


Castanopsis hystrix


Uneven aged mixed forest of Betula alnoides × Castanopsis hystrix
October 2010 October 2014

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