Soil elements and microbial characteristics of Malania oleifera under different site conditions
There were significant differences in the seed oil and neuronic acid(NA)contents of Malania oleifera in different habitats.In order to investigate the relationship between soil nutrient elements,microbial types and the seed oil content and NA content of M.oleifera,soil physicochemical properties and microbial compositions of different habitats of M.oleifera in the main distribution areas were tested and analyzed.The results showed that there were significant differences in soil pH,macroelements content,secondary elements content and trace elements content among the habitats,which were related to the rock exposure in the habitat.The pH value of the rocky mountains with high rock exposure rate was significantly higher than that of the earthen mountains with a low rock exposure rate.Except the contents of P,S,Cu,NH4+-N,NO3--N and AP,the contents of all other elements of the rocky mountain habitats were significantly higher than those in the earthen mountain habitats.The biomass of AMF,SF,and Fungi in the rocky mountain habitats was significantly higher than those in the earthen mountain habitats,while the Si content in the earthen mountain habitats was significantly higher than that in the rocky mountain habitats.There was a certain correlation between soil physical and chemical properties and soil microorganisms.The content of soil Si was significantly positively correlated with GP:GN,but significantly negatively correlated with pH and other elements(P＜0.05).The high contents of soil pH,K,Ca,Mg,Fe,Zn,AMF,SF,Fungi contents in the rocky mountain habitats may be related to the higher oil content and NA content of M.Oleifera were higher than those in the earthen mountain habitats,which led to the differences in the head fruit oil content and NA content between rocky mountains and earthen mountains.
万方数据
维普
