巨大芽孢桿菌F1配施有機(jī)物料對(duì)土壤理化性質(zhì)的影響

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Abstract： Soil health is criticalforensuring foodsecurityandsustainable agriculturaldevelopment.Thequantity andquality of soilaggegatesarekeyindicators forevaluatingsoil health.Inorder toinvestigate theefectsofco-applicationof extracellularpolysaccaride-producingBacilusmegateriumFandorganicmaterialsonsoilaggregates，soilutrintsand itspotentialforsoilimprovementandaplication，F(xiàn)1fermentationbrothorganicmaterialsandtheircombinationare appliedseparatelytosoilforcultivation.Asoilaggregateanalyzer isused toassesschanges inthecontentofwater-stable aggregates.Soilalkaline hydrolyzablenitrogen，availablephosphorus，available potassum，organic mater，and soil polysaccharides are determinedusing thealkalinediffsion method，molybdenum-antimonyanti-spectrophotometryflame atomic absorptionspectrophotometrypotassiumdichromate dilutionmethod，andanthrone sulfatecolorimetricmethod， respectively.Principal component analysis （PCA）is employed tocomprehensively evaluate the soil improvement ffectsof F1fermentation brothandorganicmaterials.TheresultsshowthatF1fermentation broth significantlypromotes soil aggregate formation，andthecombinedapplicationofF1fermentation broth withorganicmaterialsenhances both soil fertilityand theformationand stabityofsoilaggregates.After42daysofcultivation，thetreatmentwithF1fermentation broth and different organic materials increase the total content of water-stable aggregates by 41.08%～41.80% ，reduce the fractal dimension by 14.55%～15.32% ，and raise the levels of soil alkaline nitrogen by 12.09%～38.25% ，available phosphorus by 88.17%～241.10% ，available potassium by 74.79%～421.06% ，organic matter by 53.15%～108.01% 。（剩余14436字）