Studies On Wood-Inorganic Biomineralized Composition

The formed mechanism of wood-inorganic biomineralized composition has been investigated from angles of wood science .Using this formed mechanism to become the research subjects from dead material to the living material. It can arrive to improve wood properties. In this paper,the silica contents of natural wood-inorganic biomineralized composition , the ambience comdition of natural wood-inorganic biomineralized composition,the formed mechanism of natural wood-inorganic biomineralized composition,the bamboo/inorganic biomineraliazation composition , the response of nursery stock physiological and biochemical characters under Na₂Si₃ stress and wood-inorganic biomineralized composition under Na2Si3 stress were researched. The research results are as follows:(1) The variety regularity of the silica contents of natural wood-inorganic biomineralized composition. The SiO₂ contents decrease in turn from underside of trunk to treetop in different axial distribution of Eucalyptus citriodora and Acronychia pedunculata . In different radial distribution,the SiO₂ contents of Eucalyptus citriodora increase from heartwood to sapwood and the SiO₂ contents of Acronychia pedunculata decrease from heartwood to sapwood .(2) Studies on the ambience comdition of natural wood-inorganic biomineralized composition.The SiO₂ contents of natural wood-inorganic biomineralized composition and sorrounding soils are positive correlativity. The natural wood-inorganic biomineralized composition are growing in acidity or tiny acidety soils . The SiO₂ contents increase with soil pH value decreasing. The pH value of natural wood-inorganic biomineralized composition increases with tree height increasing. However,the SiO₂ contents of wood decrease.(3) Studies on the natural wood-inorganic biomineralized composition by SEM-EDXA. The silica and crystal of wood are deposited in ray parenchyma,longitudinal parenchyma,septate fiber and vessel. The main chemical elements of crystal is CaCO₃ and CaC₂O₄. The main chemical elements of silica is SiO₂.The shapes of silica are mainly rough grains,smooth grains,aggregate grains,grape grains,cloud grains. The dimensions of silica and crystal change small in turn from underside of trunk to treetop. (4) Studies on the natural wood-inorganic biomineralized composition(Eucalyptus citriodora and Acronychia pedunculata wood) by XRD,FTIR,XPS. The phaze of silica is mainly amorphous SiO₂ analyzed by XRD. Si spectras presented to 2931-2924 cm^-1,1051-1048 cm^-1,834 cm^-1 analyzed by FTIR .The binding energy of C,O and Si elements presented to 284-290 eV , 531-534 eV and 103 eV. The natural wood-inorganic biomineralized composition existed the form of Si-O-C. The silica exists in wood in SiO₂ form and combines with organic macromolecule .(5) Studies on the silicon of Pleioblastus amaru by SEM-EDXA,XRD,FTIR. The silica of Pleioblastus amarus contained C,O,Si,Mg,Al,K and Ca elements analyzed by SEM-EDXA. The phaze of silica in Pleioblastus amarus is mainly amorphous SiO₂ analyzed by XRD. Si spectras presented to 2921-2900 cm^-1,1052-1048 cm^-1,852-834 cm^-1,771 cm^-1 analyzed by FTIR .(6) The Acer buergerianum and Machilus yunnanensis have been stressed by different Na₂SiO₃ concentrations. it can be shown that Na₂SiO₃ concentrations in certain limit can promote the grown of plants from 0.0mmol/L to 21.0mmol/L.,and meanwhile,it can also protect the cell of plants. However,high Na₂SiO₃ concentrations can be harmful to the cell of plants from 21.0mmol/L to 35.0mmol/L.(7) The nursery stock stressed by different Na₂SiO₃ concentrations were researched by SEM-EDXA.The silica and crystal are deposited in ray parenchyma,wall of vessel,spiral thickening of vessel wall,vesselperforation,pit and fiber. The shapes are aggregate grains,rough grains,smooth grains and abnormity. It shows that the manual modelling is feasible and successful.