Quantitative assessment of priority for conservation of the national protected plants in Zhangheyuan Nature Preserve of Nanzhang County

Based on the field investigation and known data,the distribution of the national key preserved wild plants in Zhangheyuan Nature Preserve was studied and analyzed in this paper,and the priority conservation of the national key protected wild plants was quantitative analyzed by using the threatened coefficient,the genetic coefficient and the specific value coefficient.The results were:(1) There were 21 species of the national key preserved wild plants in Zhangheyuan Nature Preserve,among which 3 species belonged to the first class,18 belonged to the second class,and each accounted for 45.65%,37.50%and 47.37%of the Hubei province's distribution,respectively. (2) 21 species of the national key preserved wild plants were sequenced by the system of priority conservation and evaluation,and the results were different fromThe checklist of national key preserved wild plants(The first passel):Toona ciliata,Cercidiphyllum japonicum,Phoebe bournei and Phoebe zhennan belonged to the first rank preserve, and accounted for 19.05%;Picea neowitchii,Emmenopterys henryi,Cephalotaxus oliveri, Liriodendron chinense,Ormosia henryi,Taxus chinensis,Taxus chinensis var. mairei,Ginkgo biloba,Camptotheca acuminata and Phellodendron chinense belonged to the second rank preserve,and accounted for 47.62%;Magnolia officinalis,Magnolia officinalis ssp.biloba,Zelkova schneideriana and Torreya fargesii belonged to the third rank preserve,and accounted for 19.05%;Fagopyrum dibotrys,Cinnamomum camphora and Glycine soja belonged to the fourth rank preserve,and accounted for 14.29%.(3) Plant threatened status and priority preservation sequence were more truly reflected by the evaluation and rating results from this evaluation system.