Study On Resources Of Seed Plants In Micangshan National Nature Reserve Of Shaanxi

This study is based on the seed plants in Micangshan National Nature Reserve of Shaanxi as the research object,using the method of dot-line combination,line investigation and random survey to conduct a comprehensive investigation of the seed plants,analysis floristic characteristics and composition of families,genera and species in reserve.The aim was to update the list of biodiversity in the reserve,clear the quantity and characteristics of wild plant resources in the region,and provide the basis for its sustainable development and biodiversity conservation.The main conclusions are as follows:1.Abundan seed plants.There are 1690 species of seed plants belonging to 659 genera and 143 families in Micangshan National Nature Reserve of Shaanxi.In which 6 families,13 genera,16 species and 4 varieties are gymnosperms plants;118 families,538 genera and 1434 species are dicotyledonous plants;19 families,108 genera and 236 species are monocotyledons plants.The main resource genera and species are more concentrated in the multi-specific family and multi-specific genera.The mono-specific family,the mono-specific genera and the mono-genera family with less species.2.Complex geographical composition.The geographical elements of families have 9 types and 10 variants,the geographical elements of genera have 15 types and 19 variants about seed plant flora in this area.In the geographical elements of the families,58.42 % of all the families in the region are tropical,with a total of 59 families,69.49 % of which are tropical and include 41 families.And in the geographical elements of the genera,48.83 % of all the genera in the region are temperate zone,with a total of 292 genera,55.82% of which are north temperate zone and include 163 genera.3.Plant flora of adjacent areas is closely related.Compared the floristic elements of seed plants between the Micangshan reserve of Shaanxi and four adjacent areas by using Sc values of species in different regions.The results showed that the flora is dominated by temperate zones,and have close relationship with Guanyin Mountain,Taibai Mountain and Niubeiliang nature reserve,which is most closely related to Guanyin Mountain protection zone.4.Discovery of new record plants.6 newly recorded species and 2 new recorded genera of Shaanxi were found in the botanical expedition about the reserve.5.Rare and endangered plants are abundant.There are 57 national protected species of wild plants in protected areas,in which 7 species are the first class,50 species are the second class.There are 20 endangered species,6 endangered species and 6 rare species in the rare and endangered plants in Shaanxi.Among the applied plants,there are 22 species rare wild flower-plants,82 poisonous plants and 104 aromatic medicinal plants.6.Wild plant resources are abundant.There are 141 families,602 genera and 1309 species of wild plant resources in this area.Among them,970 species are medicinal plants,268 species are ornamental plants,146 species are oil plants,133 species are forage plants,122 species are timber plants,96 species are fiber plants,96 species are tanning plants,82 species are starch and carbohydrate plants,57 species are aromatic oil plants,57 species are nectar plants.In summary,The floristic elements of seed plants are complex in Micangshan nature reserve in Shaanxi.It is rich in plant resources and has high protected value.By sorting out the species and quantity of plant resources,we can provide data reference for deep-level conservation and reasonable-efficient utilization of these plant resources.