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1、TheAnalysisofEcosystemhealththeoryandevaluationmethodAbstractInthispaper,theemergenceanddevelopmentoftheecosystemhealththeory,someassessmentmethodsandindexestostudyecosystemhealthdegreeareprovided,anditspracticesongreenhouseecosysteminthecountryareintroducedalso.KeywordsEcosystemh
2、ealth,Sustainabledevelopment.Ecosystemdegradation1.EcosystemhealththeoryformationanddevelopmentEcosystemhealthlearningisprotectionanewscienceinthefieldofenvironmental.Itreflectsecologicalsysteminternalorderandthewholesituationoforganization,hasbeenusedinmanyfieldformonitoringoreva
3、luationoftheecologicalsystemandlandscapeconditionsandquality.InternationalSocietyofEcosystemHealthJSEHisestablishedin1994.ItmarkedtheEcosystemHealthasanewbirthinthefieldofscienceandtechnology.TheoriginoftheconceptofEcosystemhealthcandatebacktotheearly1940s.in1941,thefamousecologis
4、ts,landexpertsAldoLeopoldfirstdefinedlandhealthyandusethe“landdisease^describethelandfunctionaldisorder.In1942,TheNewZealandsoiltolearnpublishedamagazinecalled"SoilAndHealth^,activelyadvocatedorganicagriculture,putforward"healthysoil一healthyfood一person".60〜70s,withtheglobalecologi
5、calenvironmentdeterioration,ecologytorapiddevelopment.Inthe80s,peoplepaymoreandmoreattentiontotheecosystemofthestressmanagementproblem,in1984theUnitedStatesecologicaltolearntohostentitlednbornstressStatesystemdescriptionandmanagementofthewholemethod"seminar.1988SchaefferD.J.,discu
6、ssedaboutecosystemhealthmeasureforthefirsttimeJ989RapportD.J.discussedtheconnotationofecosystemhealth,betheforerunnerofecosystemhealthresearch.Forthedefinitionofecosystemhealththatcurrentlythereisnocommonwithpointofview・KarrJ.R.believethatifapotentialoftheecologicalsystemenoughtog
7、ainrealizationandstablecondition,interferencewithself-repairingability,theecosystemishealthy.SchaefferD.J.andthinkwhenEcologicalfunctionsofthesystemhavebeenoverthethresholdlimittheecologicalsystemishealthy(herethethresholdisdefinedas“Whenaftermorethancanmakewillthreatenecosystemsc
8、ontinuetosend,theincreaseoftheunf
