Shoot Culture And Somatic Embryogenesis In Aspen Clones

Masson pine (Pinus massoniana Lamb.) Be antiquited our country home village seeds of trees, be that the geographical distribution is the broadest relax to belong to seeds of trees, cultivate one of the mainest have a long history our country reproducing tree species, relate to 18 our country southward provinces (autonomous region, municipality directly under the Central Government). In Zhejiang forest cover, coniferous forest area accounts for 85% of area forest is general, the pinetum area taking that masson pine is that predominant pinetum area has amounting to 2,371,000 hm2, already transfers as organism's habits public welfare forest among them has 824,000 hm2. A lot of go into is indicated, compared with broad-leaved evergreen forests, the organism's habits of masson pine forest function is relatively relatively poor, organism's habits public welfare forest reforms therefore to masson pine forest studying, construction has very important significance to the health promoting Zhejiang organism's habits public welfare forest.This study from the community study of pinus massoniana, the key choice Chun'an both clashes, supplying multinational oems' divisions of Zhejiang Lin'an Longyou, Pujiang,,5 counties (cities) of ecological forests in key areas and typical sample survey and analysis of the typical, total 34 sample and two low reforming the sample. Research shows that:1. Using Euclidean distance (Djk) community, the similarity coefficient between the clustering analysis, the ecological forests will be well into pure forest types (pinus massonianaⅠ), and the high shrub layer of pinus massoniana mixed type (Ⅱ), human interference special mixed type (Ⅲ), and high in pinus massoniana shrub layer> pinus massoniana mixed type with evergreen and deciduous broad-leaf forest types of intermediary between compound type (pine broad-leavedⅣ(leaves) -- with evergreen and pinus massoniana), mixed type (broadleaf deciduous compositeⅤ), with evergreen and deciduous in masson pine broad-leaved mixed type of composite with evergreen broad-leaved and widening of pine forest types of intermediary between compound type (-) (Ⅵ) evergreen broadleaf evergreen broadleaf to give priority to, the pine forest types (Ⅶ) composite, seven types.2. A standardized, choose evergreen broad-leaved forest inⅧtype type (in) and widening of evergreen broad-leaved forest types of two types of composite loose, role for this type of target, the target of two types of pinus massoniana type community similarity analysis, reveals the targeting of similar type, or close relationship of pinus massoniana ecological forests that focuses on how to improve the reconstruction of such proportion of pinus massoniana or important value, and notice the native species, improve the zonal vegetation similarity of nature.3. Analyses various types of tree layer and the shrub layer and herb layer, species richness index (S), and species diversity index (D). Simpson Shannon-Wiener index (H) and Pielou index (JH). and from the theory of succession of pinus massoniana, in order to analyze various types of natural succession in process of species diversity, classification of pinus massoniana ecological forests transformation provided scientific basis.4. Respectively, from the community structure in various types of detail analysis, and various types of community species composition, structure, the site conditions and background, and put forward the corresponding enclosure, planting, thinning and reconstruction technique based on evergreen hardwood species, and puts forward the structure and composition of rich with evergreen broad-leaved forest types (loose compound) as inefficientⅦtypes of pinus massoniana ecological forests transformation of directional goal or using the model.5. In the study, based on the development of Chun'an, Jinshan in Xin'an river, Taimu mountain forest, etc, the experiment reform experiment of pinus massoniana broad-leaved ecological public welfare forest construction of pinus massoniana, from the Angle of thinning and cultivating transformation sample, forest planting and tending transformation sample analysis, the effect is obvious.