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1、TypicalfarmlandsoilfertilityascendingmechanismresearchinguangdongprovinceYankaichen(Collegeofresourcesandenviroument,SouthChinaAgriculturalUniversity,Guangzhou510642,China)Abstract:Naturalqualityisnothigh,cultivatedlandresourcesinourcountryislimited.Alt
2、houghwedoalotofworktoimprovesoil,soilstillaccountsformostofthearablelandarea,butnowthemiddlereach2/3.Sincethesecondsoilcensus,organicmattercontentinmostofthefarmlandinChinahasimproved,buttheoveralllevelisnothigh,theaveragecontentislow,onlyaboutEuropeana
3、ndAmericandevelopedcountriesgenerally.Withtheimprovementoffarmlandintensiveutilizationdegree,alargenumberoflarge-scaleplantingfarmsprangup,alargenumberofagriculturalchemicalsandthepopularityoflargemachines,andcausealotofnewsoilproblems,suchassoilcompact
4、ion,structuredegradation,aggregatestabilitydecreased,soilbiologicaldegradationfunction,reducedwaterraisebufferingcapacityetc,isoneofthemostimportantcontentofsoilorganiccarbonandreducethestabilityoftheaggregate.Generallytakesuphighqualitycultivatedland,c
5、ultivatedlandoccupancyandtheincreasingnumberofcultivatedlandisofteninferiorexacerbatetheproblemoffarmlandsoilfertilitydecline.Thisstudybycollectingdifferenttypicalareaofguangdongprovincefarmlandsoilfertilitylevel,throughtheanalysisofcomponents,qualityan
6、ddistributionofsoilorganicmattercontent,soilaggregatecharacteristicsanditsinfluencingfactors,11explorecanrepresentbasicfarmlandsoilindicatorofsoilfertility,improvethekeybyreveallimitsoilprocessesandfactors,lookingforeffectiveregulationpathway;Throughthe
7、regulationoforganicmattertransformationprocessanditsdrivingfactorsinincreasingsoilorganicmatteraccumulation;Finallyrealizetheascensionoffarmlandsoilfertility,increasingfoodproduction,improvethequalityofthefood.Keywords:Typicalfarmland、soilfertility、Asce
8、ndingmechanism、Soilquality1Introduction:Farmlandsoilorganicmattercontentofthelargeareaappearslowerinourcountry[1],thevariationofsoilphysicalandchemicalproperties,soilfertilitydeclinetrend.Soilaggregateisthebasisoftheformationofso
