| Agricultural is the base of country economy,the stand or fall of agricultural lie on actor orinferior of agriculture ecosystem environmental .With the progress of history and human ,theinfluence for agricultural ecosystem environmental has been increased because of humanactivaty. Agricultural ecosystem environmental always has been changing; This chang bothmake it develop towards availability direction and also possibally make it has a exasperatetrend,this has been embodied by all kinds of new question and instance in agricultural ecosystemenvironmental in recently years.Agricultural ecosystem environmental has becomed thedirection of society at the present age even down to future.so, evaluation for the agricultureecosystem environmental ,understanding the chang of agriculture ecosystem environmentalimpersonality ,have a very important effect for rebuilding , developing and using in reason ofagriculture ,constituting favourable agriculture ecosystem environmental and maintenancing thebalance of agriculture ecosystem .Many theories and scientific research have been acquired since"七五"after nearly twenty years tackle key problem research .This article make a evaluation firstfor the agriculture ecosystem environmental quality of Nihe watershed.Designing the guide linesystem of evaluation for the agriculture ecosystem environmental quality,and making a evaluationfor the agriculture ecosystem environmental quality of Nihe watershed and collate applyingmultilevel blur complex model —gray relating predominance analysis .This paper aims toprovide the scientific basis for realizing region ecosystem good cycle and economy continuancedevelopment.I get thereinafter conclutions by contrasting with collate region.1,Absoluteness pollution isn′t serious in this valley,the reason which cause it′senvironmemt pollution comparatively serious than collate is agriculture chemistrypollution.Increasing pesticide induce a high DDT content in rive.Because put using in avery important position but ignore management,a lot of farming membrane which has beenremained in soil after using is difficult to decompose,destroying grop granule structure ofsoil,the phenomena which soil structure become too bad is getting severity.so they shouldcarry into execution optimize fertilization technic , innocuity environment protectionstratagem and reducing use of pesticide,should reclaim plastic farming membraneremaining in soil, popularize synthesis prevention and cure technic of crop plant diseases andinsect pests,protect and improve agriculture ecosystem environment.2,After years of hardwork,soil fertility has been improved greatly in valley,organicfertilizer reach 14.67kg/a.acre,abio-fertilizer reach 18.29/a.acre, organic matter reach1.06%.Because of its upland physiogomy,the vally hold much area slope infield ,so corradeis seriouser than collate,water and soil lossing is very serious,this baffle the productivitydevolepment.How resolve this problems has become the chiefly duty in westwarddevelopment.3,The holt and water area are all less than collate,biology abundant grade is inferior thancollate. Forest and grass is absolutely necessarily in a intact agriculture ecosystem system in aregion. Only holt occupy relevance proportion in all soil,it can exert ecosystem function,suchas water and soil preserver ,adjusting climate,self-restraint fountain,reducing the earth′ssurface flow water .Because mostly of the vally are hill country and upland zone,it has morearea suitable for forest,so enhancing vegetation mantle rate of vally will be a arduous task fora period of time in future.4,The result of evaluation show that the main gaps for the crop quality of the two regionare pesticides remaining that containing chlorin and phosphor.Especially for the pesticidecontaining phosphor .So excessive using pesticides is the main reason for fruit quality declineand market strife power weak. So we should use pesticid in reason in the development ofvally from then on,fo...
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