Latosolic Red Soil Area Of Clay Minerial Of The Sequestration And Transformation Mechanism Of Soil Organic Matter

This paper studies the potential impact of clay minerals and Fe/Al oxides adsorption characteristics of organic matter by its concentration and pH in short-term. We took indoor cultivate simulation of soil and removal organic matter of the soil, which was addition of Pinus massoniana litter or glucose to research the respiratory response. We also studied using scanning electron microscopy method sweep the position of the organic clay mineral adsorption, finding chemical structure changes on the feature of organic mineral complex chemical bonds and different culture stages of organic mineral complex by FTIR. The purpose of this paper is to deepen the clay minerals and Fe/Al with the protection of soil organic carbon and clay mineral adsorption mechanism of organic matter.(1) Kaolinite, vermiculite, illite, montmorillonite and alumina on the adsorption of methylene blue by cation exchange, the performance as: montmorillonite> kaolinite> illite> vermiculite> alumina oxides.(2) Kaolinite, illite and montmorillonite mainly through hydrogen bonds and intermolecular interaction with HA adsorption. Five kinds of material with adsorption capacity of HA absorption value as follows: kaolinite> montmorillonite> illite>iron dioxide> manganese dioxide. With the increasing of humic acid solution pH, kaolinite, illite and manganese dioxide uptake of HA was reduced.(3) With the absorption of six kinds of minerals adsorption ability of starch for the performance as follows:iron oxide>kaolinite> alumina oxide>montmorillonite>calciumcarbonate> manganesedioxide. With pH, absorption amount of iron oxide, manganese dioxide and alumina on the starch solution is reduced; kaolinite, montmorillonite, calcium carbonate, these three substances showed the first increase and then decrease.(4) Gainning glucose or pinus massoniana litter in the simulation of soil microbes release carbon dioxide rate at the beginning of the training, first has increased dramatically, as the training time, simulated soil microbes release rate gradually weakened until stability of carbon dioxide. Three kinds of simulated soil after gaining glucose accumulation amount of mineralization is in turn:90% minerals>50% minerals>100% SiO2.Three gain pinus massoniana litter cumulative mineralization amount of simulated soil as follows:90% minerals>100% SiO2>50% minerals. Three kinds gaining glucose of simulated soil after 3 months of decomposition, with alkenes and aromatic substances substances.(5) With SiO2 as the control group, three kinds soil of organic matter, the rate of microbial decomposition of carbon dioxide are in line with the logarithmic function relationship. In the whole training period, soil with glucose during the period of 10-20 days to reach the maximum rate of carbon dioxide, as for the training time the rate of carbon dioxide gradually weakened until smooth.Soil in pinus massoniana litter is on the third day can achieve maximum carbon dioxide release rate, as the extension of incubation time, the rate of three kinds of soil microbial carbon dioxide until the stable gradually smaller. After three soil with glucose accumulation amount of mineralization is in turn: shale>granite>quaternary red clay.Added the pinus massoniana soil cumulative mineralization amount is shown as:shale> granite>quaternary red clay. Three kinds of soil with glucose showed: granite produced alkene; shale and Quaternary red clay is the reduction of alkanes.