白浆土型水稻土硅素丰缺特性与生物硅肥在水稻上的应用效应

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1、AbstractAlbicsoil∞testsoil．usedfieldexperiment,potexperiment,indoortrainingandindoorlaboratoryanalysismethod，reseachabundance-lackofcapacitycharacteristicsforsiliconinAlbicsoilandapplicationofbiological—siliconfertilizeronricegrowth、absorptionofnutrientsandsoilfertility．Themainco

2、nclusionsareasfollows：1．Albicsoilfortheabilityismiddle-silicon,siliconforthevolumeis349．5kg／hm2；theutilizationofbio-Sifertilizerdecreasedwiththefertilizerincrease，withyieldcombination，maximumyieldisSi40．bio-Sifertilizerutilizationis18．78％，therefore，thebestmofbio-Siis600kg／hm。inAl

3、bicsoil．calculatedbythesoilteststhatAlbicsoilavailablesiliconandplantsiliconcontentcriticalis185．93mg／kgand0．79％．2．Throughmathematicalmodeling,cometotherelationshipbetweeuyieldandbio-Sifertilizerexiststhequadraticcurve．Theregressionequationis：Y=-O．0014X％1．9087X+8259．1R2=0．9827”．W

4、henthemarketpriceofbio-Si(p)of1．0spp，Themarketpriceofrice(q)of1．74spp，ThebestsiliconimplementationX=476．4kg／hmz，thetheoreticalyieldis8850．7kg／hmLbin—Sitheappropriatedoseofbiologicalisbetween476．4kg／hmL--681．7kgaun2．3．TheadsorptionofAlbicsoilcallbedividedintotwotypesofphysicaladso

5、rptionandchemicaladsorptionmechanism．Albicsoilbasicallybalancedsolutiontotheconcentrationof60mg／Lasaturningpoint．before60mg／Lwasmainchemicaladsorptionstage,After60mg／LWasphysicaladsorptionstage．AlbicsoilsiliconadsorptioncharacteristicswithgoodcorrelationtoLangmuirequation、Fruendl

6、ichequationandTemkinquation．Thecorrelationcoe衔cientswereabove0．9453，thebestcorrelationisLangmuirequation．Thecorrelationcoefficientis0．9996**．calculatedthatAlbicsoil’Smaximumsiliconabsorptioncapacityof2500mg／kg．thedesorptionwiththebalanceofsiliconconcentrationincreased，andthengrad

7、uallytendedtobestable．thedesorptionratebetween5．86％,．-42．77％．WhenthesiliconadsorptionsaturationofAIbicsoilbelow0．13，adsorptionsiliconWasalmostdifficultdesorption,satttrationofabsorptionintherangeO．13-0．64．desorptionbegantoincreaserapidlywiththeincreasingabsorptionsaturation,Wheni

8、tOVarO．64．siliconadsorptioncapacityincre