Cultivation Research Of The Local Tree Liquidamba Formosana Hance

Broad-leaved forest has important and no-substitutive functions in water conservation, conserving soil and water, regulating the climate and improving the environment. However, the initial stage of artificial afforestation is to give first place to Pine and Chinese fir mainly, cutting broadleaf with planting conifer, because of pursuing the economic benefits one-sidedly and the cultivation technique of broad-leaved tree is short of deep research for a long time. Thereby, it causes to happen series of ecological and economic problems such as soil degradation, biological diversity decline, pests and diseases, fire and low output, which have restricted forestry self sustainable development gravely. Liquidamba formosana Hance belongs to Hamamelidaceae family, it is an important fast-growing, high-quality and excellent pioneer tree species in broad-leaved forests. So developing the study on growth law, secondary forest reforming and mixed-forest have important realistic meanings in pretecting tree resource, developing broad-leaved tree and the native seeds.The test analyzes the stems in North Fujian, The result shows: the growth dynamic of height, diameter and volume could be expressed by polynomial regression equation. Liquidambar formosana Hance grows fast in the early stage and has a long fast-growth stage, quantative maturity of volume is coming late, it has growth potential of cultivation large dimension lumber. It was studied to reform the secondary forest of Liquidambar formosana Hance by closed forest, intermediate cutting, rational cutting and using, synthetically reform. The results indicated that the reform improved the forest niches, effectively made use of forest land, improved the tree growth, increased the forest value and got higher economic benefit. Liquidambar formosana Hance mingled forest research mainly includes the influences of mixed plantations on tree growth and soil physiochemical properties. The results showed that the growth rates of height and diameter in mixed plantations are higher than those in pure plantations. Mixed forests improve soil water-physical properties and water-conservation functions, increased soil fertility.