Current Resource Status,Nutrients of Soil and Leaf of Three Cycas Species with Extremely Small Population Distributed in Wenshan of Yunnan
In order to protect the resources of 3 Extremely Small Population of Cysas distributed in Wenshan of Yunnan province,soil and leaf nutrients were analyzed.The results showed that C.debaoensis was mainly distributed in Funing,with 6 populations and 1454 individuals,C.segmentifida was mainly distributed in Guangnan and Fu-ning,with 4 populations and 775 individuals,C.dolichophylla was mainly distributed in Maguan and Malipo,with 5 populations and 425 individuals.It was found that the populations of three Cysas were small,the numbers of individ-uals were low,and the distribution were scattered,the age structures were irrational,rescue and conservation were urgently needed.The soil nutrient contents of the habitats varied among the three Cysas species.The soil nutrient content of C.dolichophylla was relatively high,that of C.segmentifida was moderate,and that of C.debaoensis was relatively low.The contents of available Fe,Ca and Mn in soils of three Cycas species were relatively rich,whereas the content of P was deficient.The nutrient contents of three Cycas species were varied,the N,K and Ca in leaves of C.dolichophylla were high,the C,P and Mg in leaves of C.debaoensis were high,the Fe content in leaves of C.segmentifida was high.The C and Mg contents in leaves of three Cycas species were relatively deficient,the con-tents of other nutrients were moderate and high.
Cycas debaoensisC.segmentifidaC.dolichophyllapopulation current statussoil nutrientplant nutrient
万方数据
维普
