簡介：摘要2000年12月1日中華人民共和國和種子法的頒布實施，我國種子產(chǎn)業(yè)從計劃經(jīng)濟開始全面步入市場經(jīng)濟，種子經(jīng)營發(fā)生了根本性變化，打破了過去國有種子部門通過行政手段壟斷種子市場的格局，農(nóng)民種植的主要農(nóng)作物品種由國有種子部門逐級統(tǒng)供而被農(nóng)戶自愿購種所取代。農(nóng)戶選擇新品種的決策因素也由過去較為單一的政府干預轉(zhuǎn)為多影響因素。隨著種子市場的放開，種子經(jīng)營單位和新品種數(shù)量急劇增加，給農(nóng)戶選擇新品種提供了充足的機會，農(nóng)戶在多因素的影響下，結(jié)合自身的實際作出決策，可以自主地選擇農(nóng)作物新品種。本文是在種子市場新的形勢和“農(nóng)戶可以自主選購種子及農(nóng)戶是理性經(jīng)濟人”的假設下，采用參與式研究方法，對賀州市農(nóng)戶選擇新品種的決策因素進行調(diào)查研究，研究結(jié)論如下1、農(nóng)戶選擇新品種的決策過程，實質(zhì)上是核算新增總成本并與新增總收益比較的過程，農(nóng)戶作出選擇農(nóng)作物新品種的最終決策是各種影響因素綜合作用的結(jié)果。種子法實施后，影響農(nóng)戶選擇新品種決策的關(guān)鍵因素有新品種的價格、新品種的特性、廣告宣傳、農(nóng)民的文化水平、經(jīng)濟狀況、土地、勞動力等。2、農(nóng)戶作出選擇新品種的決策是理性的，農(nóng)戶是在有約束條件下追求效用最大化的理性經(jīng)濟人。本文主要是對種子法實施后農(nóng)戶選擇新品種的決策因素進行分析研究，并根據(jù)研究結(jié)論提出了相關(guān)建議，有助于種子生產(chǎn)、經(jīng)營者和農(nóng)戶更加理性地決策，使農(nóng)戶普遍選擇優(yōu)良新品種，達到增產(chǎn)增效的目的。關(guān)鍵詞種子法，新品種，決策因素，農(nóng)戶。丫653503獨創(chuàng)性聲明本人聲明所呈交的論文是我個人在導師指導下進行的研究工作及取得的研究成果。盡我所知，除了文中特別加以標注和致謝的地方外，論文中不包含其他人已經(jīng)發(fā)表或撰寫過的研究成果，也不包含為獲得中國農(nóng)業(yè)大學或其它教育機構(gòu)的學位或證書而使用過的材料。與我一同工作的同志對本研究所做的任何貢獻均己在論文中作了明確的說明并表示了謝意。研究生簽名像‘吟時間加GI年6月R日關(guān)于論文使用授權(quán)的說明本人完全了解中國農(nóng)業(yè)大學有關(guān)保留、使用學位論文的規(guī)定，即學校有權(quán)保留送交論文的復印件和磁盤，允許論文被查閱和借閱，可以采用影印、縮印或掃描等復制手段保存、匯編學位論文。同意中國農(nóng)業(yè)大學可以用不同方式在不同媒體上發(fā)表、傳播學位論文的全部或部分內(nèi)容。保密的學位論文在解密后應遵守此協(xié)議研究生簽名時間多AV4年6月T日導師簽名時間多右P診年6月1日

簡介：東北農(nóng)業(yè)大學碩士學位論文基于遺傳算法的農(nóng)作物生產(chǎn)計劃優(yōu)化研究姓名施文申請學位級別碩士專業(yè)農(nóng)業(yè)電氣化與自動化指導教師戚國強20050601STUDYONTHEAGRICULRRUREFARMINGPLANSYST囂MWITHGENETLCARLTHM囂TICABSTRACTMODEMAGRICULTUREREQUIREDHIGHPRODUCTION，HIGHEFFICIENCYHIGHQUALITYANDLOWCOSTPRECISIONFARMINGISJUSTFOLLOWINGTHISTRENDITINTEGRATEDMODEMINFORMATICS，AGRONOMYAGRICULTURALENGINEEDNGANDTECHNOLOGYINTOAGRICULTURALPRODUCTIONTOGAINAHIGHNRMINGPERFORMANCEYEARLYFARMINGPLANNINGONIMIZINGWASAIMPORTANTPROBLEMINPRECISIONFARNLINGTHEPROBLEMSOFFARMINGPLANNINGOPTIMIZINGWEREMAINLYDISCUSSEDINTHISTHESISASATYPICALNPHARDPROBLEM，THETRADITIONALOPTIMIZINGMETHODSCANHARDLYGETASATISFIEDSOLUTIONGENETICALGORITHMISONEOFTHERANDOMSEARCHINGALGORITHMSWITHMANYEXCELLENTCHARACTERISTICSBASEDONTHEANALYSISTOGENETICALGORITHM，THISSTUDYPROPOSEDAFARMINGPLANNINGOPTIMIZINGMODEL，ANDDEVELOPEDAFARMINGPLANNINGOPTIMIZINGSYSTEMFIRSTOFALL，THEMETHODFORFARMINGPLANNINGOPTIMIZING，BASED0NGENETICALGORITHM，WASANALYZEDTHEORETICALLYINTHISTHESISACODINGSCHEMEWITH01FORTHEDESCRIBINGOFTARGETMATRIXANDANINTEGERTYPECHROMOSOMECODINGSCHEMEWASPROPOSEDTHEFITNESSFUNCTIONSUNDER3DIFFERENTPOLICYCONDITIONSWEREDESCRIBEDRESPECTIVELYINTHISTHESISSECONDLNTHEFARMINGPLANNINGCIMSSYSTEMWASANALYZEDANDDESIGNEDTHEFARMINGPLANNINGOPTIMIZINGSYSTEMWASDEVELOPEDBYTHEDEVELOPINGTOOLOFVISUALBASIC60BASEDONTHISSYSTEM，DATAEXPERIMENTSWERECONDUCMDFORFARMINGPLANNINGONIMIZINGEXPERIMENTALRESULTINDICATEDTHATTHEFARMINGPLANNINGONIMIZINGMODELWITHGENETICALGORITHMHASAVERYGOODPERFORMANCEINCROPPLANNINGOPTIMIZINGFINALLY，THEPROBLEMOFPARAMETERSELECTIONINFARMINGPLANNINGOPTIMIZINGBASEDONGENETICALGORITHMWASSTUDIEDTHROUGHFATHERDATAEXPERIMENTSOMECONCLUSIONSWEREGAINEDFROMTHERESULTOFDATAEXPERIMENTANEXCELLENTINDIVIDUALKEEPINGPOLICYCOULDIMPROVETHEEFFICIENCYINCHROMOSOMEEVOLUTIONLOWERMUTATIONRATEWILLCAUSEPREMATURECONVERGENCEANDBRINGTHECOLONYINTOALOCALOPTIMALAREA，WHILEAHIGHERMUTATIONRATEWILLCAUSECOLONYDEGENERATIONANDVII

簡介：中國農(nóng)業(yè)大學碩士學位論文農(nóng)作物種子產(chǎn)業(yè)發(fā)展研究以赤峰地區(qū)為例姓名左慧忠申請學位級別碩士專業(yè)公共管理指導教師肖海峰20050501ABSTRACT111ESEED，ASTHESPECIALANDIRREPLACEABLEAGRICULTURALMEANSOFPRODUCTION，ISTHECARRIERPLAYINGAAGRICULTURALANDSCIENTIFICANDTECHNICALROLE，ITHASREFLECTEDTHELEVELOFANATIONALAGRICULTURALSCIENCEANDTECHNOLOGYLEVEL。RESEARCHTHATTHISTEXTCOMPARESCURRENTSITUATIONOFTHEDEVELOPMENTOFINDUSTRYOFTHEDOMESTICANDINTERNATIONALSEED。SISEEDINDUSTRIALIZATIONISANIMPORTANTCOMPONENTOFAGRICULTURALINDUSTRIALIZATIONTHEINDUSTRIALIZATIONOFTHESEEDIMPELSTLLCINDUSTRYOFSEEDSTOMOVETOWARDSTHEDEVELOPMENTTRACKSOFONESOWNSELFDEVELOPMENT，BENIGNCYCLETHATREGULATESONESEL‘ACCUMULATING，HELPTOADVANCETHEMODEMIZATIONDRIVEOFSEEDSMAKETHEINDUSTRYOFTHESEEDTOMOUTSUSTAINABLE。THEDEVELOPEDCOLINTRYDEVELOPSTHEINDUSTRYOFSEEDSTHROUGHVARIOUSKINDSOFINCENTIVEMEASURESANDADMINISTRATIONMEANSTHEIMPROVEDVARIETYHASALREADYBEENUPTO50％一60％TOTHECONTRIBUTIONRATETHATAGRICULTUREINCREASEDPRODUCTION；INOURCOUNTRYONLYABOUT36％OFCONTRIBUTIONRATETHATTHEIMPROVEDVARIETYINCREASESPRODUCTIONTOAGRICULTURE。11LEDEVELOPEDCOUNTRYUSESTHENEWANDHIGHTECHNOLOGYANDSUPPORTONPOLICYTOMAKETHEINDUSTRYOFTHESEEDSTEPINTOTHEWACKOFINDUSTRIALIZEDDEVELOPMENT，CHARACTERISTICITSWHETHERSEEDMANAGEMENTLEGALIZE，PRODUCESPECIALIZATION，PROCESSMECHANIZED，QUALITYSTANDARDIZATION，DEALINGROUPING，BREEDINGREATNUMBERSTOSELLTOINTEGRATETHEINDUSTRIALIZATIONOFSEEDOFOURCOURTTRYSTARTSRELATIVELYLATE，THELEVELOFPRODUCTIONOFTHESEEDLAGSBEHIND，THEFOUNDATIONISWEAK。COMPAREDWITHDEVELOPEDCOUNTRYTHEINDUSTRIALIZATIONPROCESSOFSEEDOFOURCOUNTRYLAGSBEHIND，ISSTILLATPRIMARYSTAGE，ITSHOULDERSHEAVYRESPONSIBILITIES，NEEDSTOHAVEGREATERBREAKTHROUGHINSUCHASPECTSASTECHNOLOGY，MANAGEMENT，IDEA。CHIFANGAREAISTHEIMPORTANTAREAOFSEEDDEVELOPMENTANDDOMINANTREGIONOFSIININNERMONGOLIANATHROUGHDEEPLYINVESTIGATIONANDCOMPAREANALYSIS，THETHESISPUTFORWARDACTUALITYANDPROBLEMS。STILLTHEREARETWOKINDSOFQUESTIONSOFDIFFERENTNATUREINPRESENTSEEDINDUSTRIAL【IZEDDEVELOPMENTONEKINDISDECIDEDBYITDEVELOPINGSTAGE，ANOTHERKINDEMERGEDIMPROPERLYBECAUSEOFGOVERNMENTINTERFERENCE，THELATTER’SHARMFULNESSISGREATER。INPRESENTPOLICIES，THEKEYIMPETUSCONCENTRATESONSUPPORTINGSEEDENTERPRISES，STRENGTHENINGTHEINTERESTSMECHANISM，PREVENTINGTHREERESPECTSOFREPEATEDCONSTRUCTION，HOWEVERSOMEQUESTIONSHAVENOTCAUSEDENOUIGHATTENTIONYETEITHERFIRST，THEFINANCIALSUPPORTPOLICYISUSEDIMPROPERLY，SECOND，THEMEASUREWHICHDEVELOPSSEEDENTERPRISESISUNFAVORABLE，THIRD，PREVENTTHEREPEATEDCONSTRUCTIONMEASUREFROMBEINGUNFAVORABLE，F(xiàn)OURTH，THELEGALSYSTEMHASNOTPAIDEUOUGHATTENTION。ACCORDINGTOABEVEMENTIONEDANALYSISINORDERTOMOVEFURWARDANDSTANDARDIZETHEDEVELOPMENTOFSI，PROPOSETHEFOLLOWINGPOLICYRECOMMENDATIONSOPTIMIZETHESUPPORTPOLICYSYSTEMOFTHEINDUSTRYOFSEEDS；DEEPENTHEREFORMOFCIRCULATIONSYSTEMOFSEEDSADVANCETHEPROTECTIONWORKOFTHENEWVADETYPLANT；STRENGTHENTHESCIENTIFICANDTECHNOLOGICALCONTENT；PERFECTTHESEEDMANAGEMENTORGANIZATIONDEEPENTHESYSTEMREFOMLOFSEEDENTERPRISES。KEYWORDSSEEDINDUSTRYSEEDINDUSTRIALIZATION；DEVELOPMENT；STUDY。N

簡介：湖南農(nóng)業(yè)大學碩士學位論文湖南省主要農(nóng)作物生產(chǎn)效應年際動態(tài)研究（19832003）姓名李阿利申請學位級別碩士專業(yè)種植指導教師鄒冬生20050601ABSTRACTTOCONTROLCROPSCOSTOFPRODUCINGTOADJUSTTHESTRUCTUREOFFARMINGSTRATEGICTHEAGRICULTURERESOURCESISTOINSTALLEXCELLENTTHEAGRICULTURESUBSI街ANDSUPPORTPOLICYALLBASEDONTHEDATAOFTHEPRODUCTIONCONDITIONESPECILLYNEEDTOASSAYTHEDIRECTIONFORPRUDUCTIONOFFARMINGPASSKNOWINGTHERELATIONANDTHEDEVELOPEREGULATIONSBETWEENPRODUCTIONSCALEYIELDPERFORMANCEOFINVESTIGATETHEFARMRMINGPARTICULARLYTOASSAYDIFFERENTAGRICULTUREPOLICYINCORRESPONDINGPERIODDIRECTIONTOKNOWTHEDEVELOPMENTCIRCUMSTANCEOBJECTIVELYSUCCEEDEXPERIENCEANDSHORTAGETOESTABLISHTHEDEVELOPSPOLICYFORHUNANEVENTHEWHOLENATIONALPROVIDETHEBASISFORSTRATEGICADJUSTMENTOFTHEINNERSTRUCTURETHEAGRICULTUREINCREASESTHEEFFECTTHEFARMERINCREASESINCOMEWEHADHAVETHESTUDYOFTHEMAINFARMINGTHISYEARACROSSANALYZETHEAREAOFSOWSEEDSOUTPUTCOSTANDPRODUCEFORM1983TO2003ANDTHEDIRECTIONOFDEVELOPFORFARMINGGETTODRAWSOMECONCLUSIONS1THESTRUCTUREOFFRAMINGINHUNANISEXPANDINGBECOMGMANYFACEDTEDBUTTHEABSOLUTEADVANTAGEPOSITIONOFTHEPROVISIONSDIDNOTVACILLATIONTHESTRUCTUREOFFARMINGISDEVELOPINGTOWARDSUPERIORQUALITYBUTTHECONTRADICTIONISSTILLOUTSTANDINGEMBODYINGONTHESTRUCTUREANDSTAGESTHESTRUCTUREOFFRAMINGISTURNINGTOTHENEEDOFMARKETBUTTHEWAYSTOCIRCULATEWERENOTLUCIDTHEPRODUCTIONSCALETOOSMALLANDLESSPROFESSIONDEGREE2THETOTALYIELDOFMAINFARMINGINHUNANWEREHAVEDESCENDSTEADYSUCHASRACEANDWHEATANDSOMEWERERISINGAPPROPRIATESUCHASRAMIE

簡介：分類號UDC密級單位代碼湖南農(nóng)業(yè)大學中職教師在職攻讀碩士學位學位論文Y80．1038豫湘兩省主要農(nóng)作物生產(chǎn)效應年際動態(tài)對比研究19832003COMPARATIVESTUDYONPRODUCTIONEFFICIENCYOFMAINFIELDCROPSINHENANANDHUNANPROVINCESDURING1983．2003研究生姓名逝絲洼指導教帥鄒圣生塑援學科專業(yè)佳塑惑壁皇登佳堂研究方向盔里生查丕筮壺墊繾羹筮星撞益燮提交淪文日期』Q5KQ論義答辯日期2005．123答辯委員會主席王國建論文評閱人黃毯屋旦差篷叢監(jiān)學位授予口期二OO五年上J一月ABSTRACTTHEPRESENTRESEARCHPAPERWASCONDUCTEDUNDERTHEBACKGROUNDSOFDUALIMPACTOFMARKETECONOMYANDTHEENTRYOFWTOTOOLLRCOUNLL口“’SCROPSPRODUCTION,THEPRODUCTIONBEMEFITCONTINUOUSDECREASE,ANDTHEPRODUCTIONSCALECONTINUOUSFAMNGA嘲YEARSWHICHINDUCEDSERIOUSLYPROBLEMOF鴰求堪鼬辨AS鋤}刊REGIONAVRRANDFORPMMO婦G嘲AINABLECROPSPRODUCTIONANDSERVICINGFOR吐1ESOLUTIONOFAPRILTHERESEARCHTAKETTENAN,HTMAN,TWOBIGPROVINCESOFCROPSPRODUCTION,ASTHECASE．ADONNGTHECONWASTAML蚶CM姍THECORRELATION批LAL卿CMETHOD，THESMMTLAEANALYTIOMETHOD,吐LETECHNICALPROGRESSRATEHLEA辨糯METHODANDSOON,THETWOPM婦CE’SCROPSPIDDL磚ORLSOWNAREA,THE奶融OUTLY．．霾’THEENTIRECOST,THEBENEFIT,THELABORPRODUCTMTY,THEEVOLUTIONRULEANDTHE職ASC旺】SOFD撞穗貍NEEBETWEEN蛙掂TWOPROVINCESⅥ}班ECOMPAREDVERTICALLYANDHORIZONTALLY．COMBININGL娜JTIVEEMGS弘D‘H】‰SUPERI啦ITYANDT11EINFERIORITYOF婦TWOPRO血CES，DEVELOPINGPOTENTIALANDTHEDIREG吐ORLDISCUSSED,THENTHEEONESPONDINGCROPSSMLCMRE鋤USTMENTPROPOSALSWEREPUTFORWARD．THEWAINRESULTSAREASFOLLOWS1．ONOVERALLCONDITIONOFCROPSIXODTRAIORBCL“OPSPLDD誠ONMMWSENSEOFHENANPROVINCEPOSSESSGREATERSCALEANDNATIONAL盤黼THESOWNARL齙ARDTHETOTALOUTPUTGROWCONTINUEOUSLY,ANDSHOW’THREELOWSANDTHREEHIGHS’OUTPUTVALUE,NETOUTPUTVALUE,AND嘛CO,WERELOW,WHILEPERLABORDAYOUTPUTVALUE,PERLABORDAYNETINCOME,NETINCOMERATEWERE1,．碘．THESEINDICATEDEVIDENTEOMPEFITINGSUPERIORITYANDDEVELOPINGPOTENTIAL．THECROPSPRODUCTIONOFHTMMPROVKNCEHADMMLLSEAKANDITSNATIONALSHAREIS疆越，THESOWNAREAANDTHETOTAL瑚印IL建稍穗ONFL,ETENDENCYOFRISEF璐TTHENFALL．ANDTHE陽曲刪黼CEIS”THREEBIGHSARMLTHREELOW”O(jiān)UTPUTVALUE,NETOUTPUTVALUE，ENTIRECOSTWEREHI【GHANDPERLABORDAYOUTPUTVALUE,PERLABORDAYNETINCOMEANDNETINCOMERATEW瓣LOW．THESEINDICATEDRELATIVECOMPETIFINGINFERIORITY．2．ONMAINCROPSSORTS，HEMNPROVINCEHADMMRLAIBLEWHOLEGRAINCROPS搿烈B舔馥SUPEFIORI套；XDTILETHEOILBEARINGCROPSHASMORECO啪犁畦嘲蜘翱秘畦潴I13‘THEINOASTFIATCROPPRODT配TION,HOWEVER,HADNOTOBVIOUSSUPERIORI鉀．ONTHECONTRARY,HTMANPRO衄．EWASATTHEPOSITIONOFSERIOUSINFERIORIVOFGRAINANDOILBEARINGCROPS，BUTITSINDUSTRIALCROPHAD鹋心斑LLYSUPERIONTYANDSTRONGERDEVELOPMENTPOTENTIAL。3。ONCONCR啦ECROPS,．HEMNPROVINCEHAS曲翻鴛群COMPETITIONSUPERIORITYIN璃TGAT,RICE,CO,RIKPEANUT．SESAME；HUNANPROVINCEHASSTRONGERCOMPETITIONSTIPEDORIB,INRAMIEANDTOBACCO．4．ONCROPSPRODUCTIONDRIVINGFORCES，THEECONOMIC野戳鼯鷂AGRICULTURALPOLICYWERELEADINGFACTORS；MNILETHEMATERIALINPU毽THESCIENCEARALTECHNOLOGY缸PUTS,船STOCHASTICLABORCOST．THEECOLO垂CAL

簡介：2006屆研究生碩士學位論文學校代碼102曲學號YS03161036摹聚』吁。|毿天擎農(nóng)作物生產(chǎn)經(jīng)營績效評估及其博弈論分析以上海市郊種植業(yè)為例院系盜疊堂隍墊堡堂丕專業(yè)厶塞地堡堂研究方向匿撼趣捌生垡曼指導教師縣丞送整援碩士研究生王玉蘭2006年5月ABSTRACT0N廿LECONDITIONOFM缸重。ETECONOMY，THEF細ERMAKESDECISIONDISPERSEMY’MDEPENDENTLYSOAST0P刪EOWNMA【ILLL主ZALIONBENEFITINMEPMDU胡ONOFCROPSTK鈿FIRIERTENDST0加OSEPLANTINGHIGIL盱COMP拋TIVEBE鵬矗TCOMMERCIALCFOPACTIVATEDBYMEPROFIT．ANESS鋤畸ALTARGETWHJCHLLLEGAVCMINENTCARRIESONREGULARIZINGTOTILEA酣CLLLTURALPRDD刪ONISM喇IIING也EFATIONSOWNACREAGCOFTHEGRAILLCROPS．THEREFORE，THETWOPANIESKLVEAC咖INCOR心ADICTIONINMEPROAU而ONOFC∞PS．HOWTOWELLCOORDINATE也EB¨砷暑RALRELATIO璐KPTOBECAMPALIBLEWITLLEACHOMEROREV讎TOBEWIN．WHIG距IM∞NANIISSUEWHICHINTLLEFBNTOF血CRESEARCHERSAND8LLRELATEDPAMES．TILISARTICKTAKESTHEFHMIL瑪HSU止MRBSOFSK咄AI硒ANEX鋤PLE，SELECTSSEVERALKINDSOF咄ALCTOPS，AND托辯缸CHESTHECONTFADICTIONBE如，EEN也ESCALE托DTLLEBENEFIT缸DTHECON扛ADICTIONB娟VECILTHEGOVEMMENT鋤D也E佃瑚ERINSUPPLI船THECHOICEOFTILECOLLTRADICDONBE“VEEN廿LESCALEAND也EBENEFITANDTLLECOORDINATEDCOUNTE冊EASUREOFMEC叫TRA成CTI∞B嘶№朗T11EGOVEMM咖姐D也EF細ER．MMEPRODUCTIONOFCROPS．THEFIMT∞TDIVIDESINTO7PARTS，廿LEFIRSTCHAPT％MEINTRODUCTION，MAINIYELABORATEDTLLISR髑EARCH90AL，TLIESIGILI6CANCE鋤DTHE∞SEARCHACTILALI娥ASWELLAS托踺ARCH啪FKPROCESS；SECOND吐AP缸也ERA蛀0NALE，弧昀DUCEDTLLEB髂IC廿LEORYWILICHTLLISFESEARCHINVOLV酣，IILCLLLDINGSCALEREW盯DMCORY觚DG咖ETHEORY；TMRDCHAPTER’TL塢GAME豳G皿DTHERCOIGANI刪ONONF0岫DA士IONAL蛐，INTMDUCEDMEOI噎GINDATA船WELL船也EREORGANI盟丘ONONTHCPRIMARYDA協(xié)；FOUNHCL印TCI；伍ECOSTALLALYSIS，H船AILAIYZEDCROPS’COSTCONSTI嘶∞，如DH髂COMPAREDTHEDI丘B(yǎng)REMCROPS’COST如D也ES硒L甜C唧STCOST；FIFLHDH印TCR，T}持A出EVEMEN忸EVAL刪ON，H船鋤AIYZEDCROPS‘∽LLIEVEMEN乜，H硒COMPAREDTILEDI任BRENCESOFDI岱搿}NTCROPS’AC_ILIEVEMEN￡S；SIXTHCHAP缸。THEG蠲弛出EORYANALYSISHASCONS臺ⅥCTEDAG鋤EMDDELFOUNDEDON也ECOST飄ALYSIS粕DTHCACHIEVEMENTS鋤ALYSISINTLLEPRODILCTIONOFCR叩S．THEIL’E幣LO塢DM鋤G鋤ENTS地I鈀西ESW11ICHREACHTLLEG鋤EBALANCEONTILEDISS婦IL盯CON曲I∞BY缸ALYZINGMEPMCESSOFME鯽E；SEVEN山CLLAPTER；THECOUNTEM％SUFEANDTLLE軸GGESTION，DISCL】SSEDHOWTOUSERCSEARCH塢SLLITSINTHIS砒ICLETOINS咖CTTHEPR刪ONP托CTI∞姐D也EDECISIONMDKIL唱OFMANAGEMENT．1TCOMESTO船CO∞LLLSION也AT1DI酗ENT啪PSHAVEDI彘RENTPE舶肌礬CEINPROD刪ON．PA1DYISCOFNPLE鈀LYDIFFI黜LT矗啪VEG鋤LESONTLLECOSTANDVI

簡介：2006屆研究，碩士學位論文Y舯6155DHBI3學校代碼10269學號YS03161037犖采吁箢不擎上海市郊主要農(nóng)作物及生產(chǎn)結(jié)構(gòu)的績效比較院系塑近生巫撞型堂堂瞳墊理丕專業(yè)厶塞地理堂研究方向蹩蜮玨筮皇規(guī)劃指導教帥昱丞送塾攫碩士研究’E挫絲2006年6月完成ABSTRACTTHETHESISRELIEDONTHEOBSERVATIONNETOVERLAYING10SUBURBDISTRICTOF?！甌HEDYNAMICOBSERVATION，INFORMATIONMANAGEMENTANDECONOMICDERFORMANCEEVALUATIONSYSTEMOFSHANGHAJAGRICULTUREECONOMYCIRCULATE”THESYSTEMC011ECTED1210FARMER’SPRODUCTIONINFORMATIONFROM2003TO2005，INCLUDINGDEVOTIONOUTPUTCOMPOSINGINFORMATIONETC’RHETHESISUSEDTHESEDATAASANALYZINGSAMPLESOFSHANGHAIAGRICULTUREECONOMVCIRCULATETHETHESISMADEUSEOFPRODUCTIONFUNCTIONTHEORLESANDDEVOTIONOUTPUTANALYTICALTHEORIESOFMICROECONOMICS，THEN，ESTABLISHEDDERFORMANCEEVALUATIONINDEXTOANALYZEANDCALCULATESHANGHAIAGRICULTUREMANAGEMENTPERFORMANCEFIRST，THETHESISANALYZEDDEVOTIONOUTPUTANDPERFORMANCEDATAOFVEGETABLEANDWATERMELONMUSKMELONWHICHINVESTIGATEDBY“THEDYNAMICOBSERVATION，INFORMATIONMANAGEMENTANDTHEPERFORMANCEEVALUATLONSYSTEMOFSHANGHAIAGRICULTUREECONOMYCIRCULATE”THETHESISCOMPAREDDEVOTLONOUTDUTCHARACTERISTICSOFWATERMELONMUSKMELONWITHVEGETABLE，ANDCAMETOKNEWTHECONNECTIONBETWEENDEVOTIONOUTPUTANDECONOMLCPER士ORMANCEFROMTHEDIFFERENTSCALE，THEDISSIMILARITYDEVOTIONLEVELANDTHEDIFFERENTDISTRICTANGLESTHEPADDYRICEISMAINFOODFARMCROPOFSHANGHAI，ANDITSPRODUCEPERFORMANCEHASIMPORTANTMEANINGTOSTABLEFOODINSHANGHAITHEREFORE，THETHESISCONTRASTEDTHECHARACTERISTICSOFDEVOTIONOUTPUTANDPERFOR【RIANCEACCORDINGASTHEDATAOFTHREEYEARS，ANDFOUNDOUTTHECERTAINREGULATIONFROMITTHETHESISTOOKPADDYRICE，‘VEGETABLEANDWATERMELONMUSKMELONASEXAMPLES，THENRESEARCHEDTHELRDEVOTION，OUTDUT，ANDECONOMICPERFORMANCEINTHEDIFFERENTREGIONSPACE，ANDSHOWEDTHEDIFFERENCEONTHEMAPFINALLY，THETHESISEVALUATEDTHETYPEOFPADDYRICE，VEGETABLEANDWATERMELONMUSKMELON’SDEVOTION，OUTDUT，ANDECONOMICPERFORMANCEINDIFFERENTDISTRICTREASONABLEROTATINGWAYOFTHEFARMCROPCANRAISEFERTI1ITYOFSOI1，ANDCONTRIBUTETOINCREASEINCOMEFORFARMERSOINTHEENDTHETHESISANALVZEDTHEDEVOTIONOUTPUTANDPERFORMANCEOFMAINCROPROTATLNGWAYSTHISCAN1EADTHEFARMERSTOADJUSTTHEAGRICULTUREPRODUCTLONCONFIGURATION

簡介：掌棱代碼10475學號104752040220孟河南大學研究生情士學位論文明清時期美洲農(nóng)作物在中國的傳種及其影響研究1。以玉米、番薯、煙草為視角●FFTUDIESOILSPRTADINGANDGROWINGANDINFLUENCESOFCROPSIORIGLOATEDINAMERICANDUNNGMINGANDQINGDYNASTIESFECESLNGOⅡMAIZESWEETPOMTOANDTOBACCOJ，J曠翟罵囊一’、＼曬和吸煙風氣的蔓延。第三章探討的是明清政府對玉米、番薯、煙草的態(tài)度及其原因。玉米傳入中國后，起初并沒有得到政府的重視和提倡。清代乾隆年間及以后，由于受到人口增長的壓力，玉米“接濟民食”的功效逐漸得到了某些地方政府官員的認識和重視，并采取措施在所屬地區(qū)進行提倡和推廣；由于玉米是進山墾殖的流民所植糧食作物的首選，流民在山區(qū)的粗放種植玉米經(jīng)常會導致水土流失，破壞當?shù)氐纳鷳B(tài)環(huán)境，再加上清政府擔心流民聚居山區(qū)會威脅其統(tǒng)治，故而在一些地方政府采取措施限制在山區(qū)種植玉米。番薯傳入中國后，其有利救荒的優(yōu)點很快就得到了明清政府的認識和重視，晚明和清代都有不少地方官員在所屬地區(qū)大力推廣種植番薯，一些官員如徐光啟、王象晉、黃可潤等人還對番薯的藏種、種植技術(shù)進行了全面的總結(jié)和探索；清代中期及以后，番薯種植因得到乾隆皇帝的提倡而日益推廣。煙草傳入后，明清政府均認識到了種煙影響糧食作物的種植、損耗地力、耗費人力和肥力、導致糧價上漲和吸煙耗費錢財、危害身體健康、敗壞社會風氣、容易引發(fā)火災等對糧食生產(chǎn)和社會生活的不良影響，并采取措施禁止種植、販賣和吸食煙草。但由于種煙的巨大利益，清代皇帝、王公貴族和政府官員多亦吸食和嗜好煙草，以及吸煙容易上癮使人產(chǎn)生依賴等原因，明清政府對煙草的政策經(jīng)歷了從厲禁到放任的過程。論文主題詞明清玉米番薯煙草傳種影響態(tài)度N

簡介：廈門大學博士學位論文走向市場一個畬族村落的農(nóng)作物種植與經(jīng)濟變遷姓名王逍申請學位級別博士專業(yè)人類學指導教師郭志超20070601ABS圩ACTABSTRACTTHESHEETHNICGROUPISALLAGRICULTURALONEWITHANAGEOLDHISTORYWITHITSMAINPOPULATIONLIVINGDISPERSEDLYAMONGOTHERDIFFERENTNATIONALITIESINTHEVASTMOUNTAINOUSAREAINSOUTHEASTCHINAINVIEWOFTHEFACTTHATTHESHELAGSECONOMICALLYFARBEHINDTHEREGIONALECONOMYTHISTHESIS，BYMEANSOFFIELDWORKCENTERINGAROUNDTHEECONOMICCHANGEOFTHESHEVILLAGESWHICHAREDISTRIBUTEDAROUNDTHEHUIMINGSIVILLAGEINCHIMUMOUNTAINAREAINTHESHEAUTONOMOUSCOUNTYOFJINGNINGINZHEJIANGPROVINCE，ATTEMPTSTOPROVIDESOMEUNIVERSALLYSIGNIFICANTTHINKINGFORTHESHEECONOMICDEVELOPMENTPATTERNITISREALLYURGENTTOFOLLOWWITHINTERESTTHESHEECONOMYWHETHERITISEXAMINEDFROMTHETIMEREQUESTANDACADEMICMISSIONOFTHESHESTUDIES，ORFROMNATIONALEQUALITYSOCIALHARMONYTHECOORDINATIONBETWEENTHEURBANANDRURALAREAS，ASWELLASTHECONSTRUCTIONOFANEWSOCIALISTCOUNTRYTHISTHESIS，ADOPTINGALLINVESTIGATIVEMETHODOF“INTEGRATINGPOINTANDSPHERE’’，TAKESTHEHUIMINGSIVILLAGEASITSKEYCASEANDITSSIXNEIGHBORINGVILLAGESASFIELDSTUDYREFERENCESITFIRSTPROPOUNDSTHEFIELDOBJECTAFTERBRIEFINGTHEHISTORICALVICISSITUDESOFTHERELATIONSHIPBETWEENTHESHEANDTHEMARKETCHAPTER1，THENOUTLINESTHESETTLEMENTCHANGES，CROPPLANTINGANDECONOMYCHANGESOFHUIMINGSIVILLAGESCHAPTERS2AND3，ANDTHENFOCUSESONTHEWAYSHOWTHEHUIMINGSIVILLAGERSREVIVEDTHEIRHUIMINGTEAINTHEINTERACTIONSWITHVARIOUSPOWERTHENANALYZESTHEPROPULSIONANDRESISTANCEINMOVINGTOWARDSTHEMARKETCHAPTERS4，5，AND6，ATTHESAMETIMEMAKESACOMPARISONBETWEENTHEIRCOMMONANDINDIVIDUALCHARACTERSONSEVERALECONOMICALCHARACTERISTICSCHAPTER7ATLAST，AFTERACONTRASTIVEANALYSISOFTHEFIELDINVESTIGATIONWITHDATAASWELLASDOCUMENTS，ANDAFTERADEEPEVALUATIONOFTHEHISTORYANDTHESTATUSQUOOFTHESHE，THISTHESISDRAWSTHECONCLUSIONSASFOLLOWSCHAPTER8FIRSTLYBYINTEGRATINGTHETRADITIONALANDMODEMCHARACTERS，THESHEECONOMYSHOULDDEPENDUPONANDEXPLOITTHEPREPONDERANTOFNATURALRESOURCESOFTHESHEAREA，THUSACHIEVINGTHETRANSFORMATIONFROMTHETRADITIONALSURVIVALMODEOFAGRICULTURETOII

簡介：單位代碼10359學號20060310103密級分類號I豳仝奪肥工學火警HEFEIUNIVERSITYOFTECHNOLOGY博士學位論文DOCTORALDISSERTATION論文題目基王G旦墾Q熊QQGY的壅佳物痘蟲主隨控智能迭筮塞撞丕統(tǒng)硒窺學科專業(yè)籃理型堂皇王捏作者姓名皇面刖導師姓名但盍佳教援完成時間2Q生3旦合肥工業(yè)大學博士學位論文基于CBRONTOLOGY的農(nóng)作物病蟲害防控智能決策支持系統(tǒng)研究作者姓名皇匾刖申請學位笪理堂譴研究方向信息筐理皇值息系統(tǒng)學科專業(yè)筻理型堂皇工程指導教師值查焦麴援2015年3月

簡介：貴州大學貴州大學2010屆碩士研究生學位論文決策樹分類算法在農(nóng)作物病蟲害診斷系統(tǒng)中的研究與應用學科專業(yè)學科專業(yè)學科專業(yè)學科專業(yè)計算機應用技術(shù)研究方向研究方向研究方向研究方向數(shù)據(jù)庫技術(shù)與軟件工程導導導導師師師師許道云教授研研研研究究究究生生生生萬武族中國﹒﹒﹒﹒貴州﹒﹒﹒﹒貴陽2010年5月分類號TP311論文編號2007020702密級公開II431算法正確性分析32432算法優(yōu)化性驗證3245本章小結(jié)33第五章診斷算法在農(nóng)作物病蟲害診斷系統(tǒng)中的應用3451背景及功能3452體系結(jié)構(gòu)3452設計流程36521診斷模型生成流程36522診斷流程3653系統(tǒng)評價37531本系統(tǒng)的優(yōu)點37532本系統(tǒng)有待改進的方面3854本章小結(jié)38第六章總結(jié)和展望3961總結(jié)3962展望39主要參考文獻41

簡介：河北師范大學碩士學位論文基于MODISNDVI的河北省主要農(nóng)作物空間分布研究姓名陳曉苗申請學位級別碩士專業(yè)自然地理學指導教師王衛(wèi)20100320IV在陸地生態(tài)系統(tǒng)各領域的廣泛應用，為農(nóng)情遙感提供了新的監(jiān)測手段，具有很大的潛力。NDVI時間序列數(shù)據(jù)可以生動形象準確地描述農(nóng)作物的生長動態(tài)軌跡，表現(xiàn)其季相節(jié)律變化的過程。農(nóng)作物的類型不同，農(nóng)事歷不同，物候期不同，其NDVI曲線規(guī)律也不相同，因此，根據(jù)農(nóng)作物的種植結(jié)構(gòu)、生長規(guī)律以及物候歷特征，分析其NDVI曲線變化特征及趨勢，可以確定農(nóng)作物類型。關(guān)鍵詞MODISNDVI時間序列數(shù)據(jù)農(nóng)作物識別作物物候空間分布

簡介：合肥工業(yè)大學碩士學位論文農(nóng)作物秸稈木質(zhì)纖維素組分分離及高效糖化工藝研究姓名易守連申請學位級別碩士專業(yè)食品科學指導教師潘麗軍20100401維素和小麥秸稈纖維素糖化40RAIN后，糖化率達到最高，其值分別為9889％、9719％，9846％；油菜秸稈纖維素糖化50MIN，糖化率達到最大值9858％；棉花秸稈纖維素糖化60RAIN，糖化率達到最大值9625％。以玉米芯纖維素水解糖為碳源，米根霉37℃發(fā)酵80H后，水解糖利用率為葡萄糖的1／3，因此纖維素水解糖可以用于生產(chǎn)乳酸等化工單體。關(guān)鍵詞農(nóng)作物秸稈木質(zhì)纖維素預處理分離糖化發(fā)酵

簡介：773414分類號513密級飛誦差≮夭等博士學位論文單位代碼學號10019TB9601010幾種農(nóng)作物超干種子保存、生理生化機理和遺傳穩(wěn)定性研究SLUDIESOILTHECONSERVATION，PHYSIOLOGICALANDBIOCHEMICALMECHANISMANDGENETICSTABILITYINULTRADRYSEEDO，F(xiàn)SEVERALCROPS研指導究生胡互苤申請學位門類級別一一壅堂蝗究在方向抽廈資源學院壅堂復生物撞盔堂瞳2005年1月專研所ABSTRACTSSEEDSOF11VARIETIESIN9SPECIESCHINESEONIONETCWEREDRIEDTODIFFERENTMOISTURECONTENTSRANGINGFROM12％TO127％SEEDSWITHDIFFERENTMOISTURECONTENTSPACKAGEDWITHALUMINUMFOILORPAPERBAGSWERESTOREDATDIFFERENTTEMPERATURES50。C，35。C，20“2，18。CANDROOMTEMPERATUREINDIFFERENTCLIMATEAREASINCHINATHE“VIGORANDVIABILITYOFSTOREDSEEDSWERETESTEDAFTERSEEDSWERESTOREDFORDIFFERENTPERIODSRANGINGFROM4WEEKSTO6YEARSTHESERESULTSWEREUSEDTOANALYSISTHERELATIONSHIPAMONGTHESTORAGETEMPERATURE，THEOPTIMMNMOISTURECONTENTSANDTHEOPTIMUMRELATIVEHUMIDITYNELONGEVITYANDTHEAFFECTINGFACTORSOFSTOREDSEEDSWEREALSODISCUSSEDTHROUGHTHETESTINGOFRESPIRATION，ETHYLENERELEASEAMOUNT，SUGARCONTENTS，F(xiàn)ATTYACIDCONTENTSOFSTOREDSEEDS，THEPHYSIOLOGICALANDBIOCHEMICALMECHANISMOFULTRADRYSEEDWERESTUDIEDTHECHROMOSOMEABERRATIONRATESINROOTTIPCELLOFWHEATANDLETTUCESEEDSWEREOBSERVEDTOSEETHEHEREDITYVARIATIONINCELLLEVELFOURKINDSOFISOZYMECHARTSOFSTOREDRICESEEDSORRICESEEDLINGWERETESTEDTOSEEHEREDITYVARIATIONINPROTEINLEVELTHESEEDLINGSOFWHEATWERETESTEDWITHAFLPANDSSRMOLECULARMARKERTECHNIQUESTHEHEREDITYVARIATIONSOFULTRADRIEDSEEDOFWHEATINMOLECULARLEVELWEREANALYZEDSEEDSWEREDRIEDANDSTOREDFORFOURTOSIXYEARS，THERESEARCHRESULTSSHOWEDASFOLLOWINGSEEDSWERESTOREDAT50“C、35“2AND20“CFORFOURTOSIXYEARS，THEOPTIMUMMOISTURECONTENTSOFCHINESEONIONSEEDSAREL8％、】851ANDL8～81％RESPECTIVELYTHEOPTIMUMMOISTURECONTENTSOFRAPESEEDSARE20％、30％AND41％RESPECTIVELYTHEOPTIMUMMOISTURECONTENTSOFLETTUCESEEDSARE20～3O％、1，9～40％AND19～64％RESPECTIVELYTHEOPTIMUMMOISTURECONTENTOFSEEDDECREASESASTHESTORAGETEMPERATUREINCREASETHEOPTIMUMEQUILIBRIUMRELATIVEHUMIDITYOFSTOREDSEEDSDECREASESASTHESTORAGETEMPERARUEINCREASESEEDLONGEVITYINCREASEASTHESTORAGETEMPERATUREDECREASE，SEEDLONGEVITYINCREASETENTIMESASTHESTORAGETEMPERATUREDECREASE15“CINTHERANGOF50℃TO20CSEEDLONGEVITYINCREASEASTHESEEDMOISTURECONTENTDECREASESEEDLONGEVITYINCREASE11TIMESASTHESEEDMOISTURECONTENTDECREASE1％INTHERANGEOF2％TO12％SEEDMOISTURECONTENTTHEREISARELATIONSHIPOFLOGARITHMREGRESSIONBETWEENSEEDMOISTURECONTENTANDSEEDLONGEVITYTHERELATIONMODELISY”MLNXWHEREYISSEEDMOISTURECONTENT％，BANDMARECONSTANT，XISSEEDLONGEVITYDAYSEEDSTOREDINDIFFERENTCLIMATEAREASFORTWOYEARSINCHINATHERESULTSSHOWEDD聊NGANDHERMETICPACKAGEISNOTNEEDEDFORSEEDSTOREDINTHECLIMATEAREASOFDRYAREAOFTEMPERATEZONEANDTHECLIMATEAREAOFALFIPLANOSEEDCANBESTOREDSAFELYWITHOUTDRYINGANDHERMETICPACKAGEINTHESEAREASFORATLEASTTWOYEARSHOWEVEGDRYINGANDHERMETICPACKAGEISNEEDEDFORSEEDSTOREDINTHECLIMATEAREASOFTROPIC，SUBTROPICS，WALTNTEMPERATEZONEANDHUMIDAREAOFTEMPERATEZONEOTHERWISE，SEEDWILLLOSSVIGORANDVIABILITYQUICKLYINONEORTWOYEARSTHROU【GHTHESTUDYINGONPHYSIOLOGICALANDBIOCHEMICALMECHANISMOFCHINESEONIONANDRAPESEEDSSTOREDATDIFFERENTTEMPERATUREFOR1216MONTHS，THERESULTSSHOWEDTHATSEEDRESPIRATIONWASENHANCEDASTHESEEDSTORAGETEMPERATUREINCREASED，ANDALSOSEEDRESPIRATIONWASENHANCEDASTHESEEDMOISTURECONTENTINCREASEDTHEETHYLENERELEASEDAMOUNTOFSEEDDECREASESASTHESEEDMOISTUREI

簡介：南京農(nóng)業(yè)大學博士學位論文農(nóng)作物秸稈資源化利用及日光溫室番茄長季節(jié)栽培肥水管理技術(shù)姓名高新昊申請學位級別博士專業(yè)蔬菜學指導教師郭世榮20060601中文摘蔓農(nóng)作物秸稈資源化利用及目光溫室番茄長季節(jié)栽培肥水管理技術(shù)摘要我國秸稈資源豐富，年產(chǎn)量居世界之首，但秸稈利用率與利用效率較低，一方面相3大一部分秸稈被焚燒或廢置，另一方面經(jīng)過技術(shù)處理后利用的秸稈所占比例甚少，造成嚴重的環(huán)境污染與資源浪費；番茄是我國設施蔬菜栽培的主要作物種類，但由于栽培介質(zhì)性狀惡化與栽培管理水平落后，番茄產(chǎn)量與品質(zhì)遠低于無土栽培技術(shù)水平發(fā)達國家。本文以玉米和小麥秸稈為材料，對其在設施蔬菜栽培上的資源化利用途徑進行了研究，并以秸稈有機基質(zhì)為栽培介質(zhì)，研究了目光溫室番茄長季節(jié)栽培中的肥水管理技術(shù)。主要研究結(jié)果如下玉米與小麥秸稈高溫堆制后作為栽培基質(zhì)使用，營養(yǎng)元素含量豐富，二者的混合基質(zhì)中全氮、磷、鉀及速效磷、鉀含量均顯著高于草炭，尤其是全鉀與速效鉀含量遠遠高于草炭，并且秸稈基質(zhì)中主要重金屬元素含量均未超標；秸稈基質(zhì)的主要缺陷在物理性狀，表現(xiàn)為客重偏小與大小孔隙比偏大，與爐渣、土壤等重型基質(zhì)材料復配可顯著改善其物理性狀，適宜的復配比例為3L左右；與對照相比，秸稈與土壤的復合基質(zhì)應用于設施番茄栽培，可顯著提高番茄葉片的凈光合速率和番茄產(chǎn)量；秸稈基質(zhì)在設施番茄栽培過程中因仍存在降解作用，栽培前后物理}生狀發(fā)生較大程度改變，尤其是存在較為明顯的體積收縮。將堆制30D半腐熟與堆制90D完全腐熟兩種不同腐熟程度麥秸堆肥植八土壤顯著改善了土壤的物理性狀，并且堆制30D堆肥的作用效果大于90D堆肥；兩種堆肥處理均顯著增加了栽培畦地表C02濃度，閉棚期30D堆肥與90D堆肥處理分別較對照增加了135．80UL／L與52．64UL／L，開棚期增加量分別為70．48UL，L與32．79UL／L；兩種堆肥處理均顯著降低了20CM土層地溫的日變化幅度，有效維持了地溫恒定，30D堆肥處理的作用效果大于90D堆肥；30D堆肥處理在增強番茄光合作用與提高番茄產(chǎn)量方面的作用大于90D堆肥，而90D堆肥處理則較30D堆肥增加了番茄葉片中葉綠素含量；綜合考慮認為，在日光溫室冬春茬番茄栽培過程中30D堆肥的改土增產(chǎn)效果高于90D堆肥，表明秸稈堆肥在作為土壤改良劑使用時完全腐熟并不是最佳腐熟程度，實際應用中應根據(jù)堆肥物料及堆制時期的不同合理確定堆制時間與腐熟程度。