Study On The Cultivate Characteristic And Afforestation Model Of Altingia Gralilipes

For a long time, our country pay attention to cultivate Chinese fir, Poplars, Eucalyptus,etc. The serious problem faced at present is that managing the artificial pure woods for a long time lead to the fact that the land fertility in the forest land fails and takes the place of a series of ecological problems of dropping etc. The artificial woods of Chinese fir is particularly outstanding . In addition, with the improvement of the social development and living standards of the people, the demand for the broad-leaf material especially high quality broad-leaf material of the market increases day by day. Seeking the fine native broad-leaf seeds, developing the broad- leaf tree to afforest, changing the present situation becomes the major issue of silviculture. Altingia gralilipes belong to Hamamelidaceae family, it is one of populations of area quality vegetation in the middle subtropical zone. It does shape perfectly, grow rapidly and have the strong disease resistance and wide use. So it is the broad leaf of fine native soil seeds deserving to popularize , but afforest has not been paid attention to. For driving Altingia gralilipes to afforest, author develop the study on the community ecology and afforesting, This have important realistic meanings in protecting resour,developing broad-leaf tree and the native seeds. The results of study show : (1)The natural forest of Altingia gralilipes after Kaiping temple receive relatively small artificial disturbance. The species in community are considerably rich, species variety is high. Altingia gralilipes dominant absolute predominance.in tree layer. Schitna superba, Castanopsis fargesii and Castanopsis fissa are dominant population, too. Tree layer includes 10 tree species such as Engelhardtiafenzeli and Randia cochinchinensis (2) Altingia gralilipes had a stable stage of structure and was a mature population.it was comparatively abundant for seedling. Castanopsis fargesii was also a mature population. Castanopsis flssa and Schitna superba were the increasing type populations. The spatial distribution patterns of Altingia gralilipes and Castanopsis flssa were randant. Castanopsis fissa and Schima superba populations had the even spatial patterns.Seedling of Altingia gralilipes can bear shady relatively and regenerate under the canopy. The spatial distribution patterns of seedlings was randant. Indicating Altingia gralilipes require unharshly to soil.(3)Using variance rate(VR), X2examination, association coefficient(AC),etc. the interspecific correlations of tree layer in the community were analysed,, among the 17 populations there are disremarkable inverse ralationships, This means that these populations have not relations generally, and indicates that in the community few populations have the same demands to habitat. This may relate to present developing stage of the community.(4)By using the Lokta-Volterra equation of competition.the final results of interspecies competition show that when reaching competitive balance.the relative dominant degrees of Altingia gralilipes and its associated species are 53.28% and 46.72% respectively,which shows that Altingia gralilipes population is controlling the whole community.Ancients tree of Altingia gralilipes inside the Fujian province grow well at present, but must strengthen propagating and protecting.(S)Utilizing order cluster method, the height growth process of seedling Altingia gralilipes is divided 4 stages.Emergence stage (March 3 - April 30), young growth stage (May 1 - August 19), rapid growth stage (August 20 - September 20), and later stage(September21 - December 10). But this result will fluctuate with the change of the meteorological factor to some extent. The results of growth curve and order cluster are basically unanimous. But the latter method is more accurate and scientific.(6)Because of different density, DBH and height of 16-year-old Altingia gralilipes in Huakou reached 12.75 cm and 12.91m respectively, and height/DBH was 101. But DBH and height of 35-year-old Altingia gralilipes in Erchong mo...