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簡(jiǎn)介:中國海洋大學(xué)碩士學(xué)位論文深水網(wǎng)箱與傳統(tǒng)網(wǎng)箱養(yǎng)殖海水魚類的比較經(jīng)濟(jì)學(xué)分析姓名李大海申請(qǐng)學(xué)位級(jí)別碩士專業(yè)水產(chǎn)養(yǎng)殖指導(dǎo)教師陳大剛20040601望查旦墮量堡笙嬰墮鲞墮查查蘭耋塑矍絲塑蘭塑一COMPARATIVEECONOMICSOFOFFSHOREANDTRADITIONALCAGEBARICULTUREABSTRACT111ISARDDEDES商BESTHECOM刪VEPRODUCTIONCOSTOFANDMONETARYRETURNSFORTHEOFFSHOREANDTRADITIONALCAGEFISHMARIENLTUM,BASEDONTHERELATEDSCIENCEDOCUMENTSANDTHEDATACOI血LGFROMTHEINVESTIGATIONINXUEJIADAOTOWNSHIP,WHICHISONEOFTHELARGESTFISHRNARIEULTUREBASESINNORTHCHINA.THESTUDYCONCLUDESTHATCURRENTLYTHEPRODUCTIONCOSTOFO婦曲0RC哪GE司曲ⅡEISHIGHERTH缸THATOFTRADITIOMLEAGEEULTURE;BECAUSETHEREISMOLEFIXEDCOSTWHENPEOPLETAKETHEFORMERWAY.OFFSHORECAGECULTUREHASFEWERADVANTAGESTHANIRADIFIONALCAGEEULTMEINTHEECONOMICPARAMETERSSUCHASBALANCEPOINT珥D1I】‰ANDM鋤AGESAFC|T、JRATE,既CEPTLABORPMDUCTNITY.THEE眥FFAECLBASONS1THEECONOMYF塒NTHERAISINGLABORPRODUCTIVITYCARMOTOFFSETTHEINCREASINGOFFIXEDCOSTWHENTHEOFFSHORECAGEISAPPLEFORTHELABORPRICEISVERYLOWINRURALDISTRICTOFCHINAAT刪2CURRENTLY,THEPRODUCTIONSCALESOFOFFSHORECAGECULTUREUNITSINCHINA躺TOOSMALLTOGETTOTHECCONOMIEPRODUCTIONSCALE.3THOUGHTHEFIXEDCOSTOFIRADIFIONALCAGECULTUREISHIGHERTHANTHATOFOFFSHORECAGECULTUREBECAUSEOFITSBEINGLOCATEDINBAYANDSHALLOWSEA,BUTNOWTHERULELESSCULTURETREMENDOUSLYRATSILLGITSMANAGERIALRISKOFFISHJN勛60LLSDISEASE.SOTHATTRADITIONALCAGEEDTUREHASMUCHMOREUNDERGROUNDMANAGERIALCOST.ASFARASTHEFISHMARICULTUREDEVELOPINGHISTORYINTHEWORLDISCONCERNED,THEPAPERPOINTSOUTTHATITISTHETEMPORARYPHENOMENONTHATOFFSHORECAGECULTUREHASHIGHERPRODUCTIONCOST.WITHTHEDEVELOPMENTOFCHINESEECONOMY,THERMXTUCTIONCOSTADVANTAGEOFOFFSHOREFISHCULTUREWILLEMERGEGRADUALLY.SEVERALRE{LSOUSARERESPONSIBLE1INTHELONGTERM,LABORPRICEINCHINAWILIRISEANDPRODUCTIONCOSTADVANTAGEOFOFFSHORECAGECULTMEWILLEI/LELGE.2WITHTHEDEVELOPMENTOFOFFSHORECAGECULTUREENTERPRISES,THEIRPRODUCTIONCOSTWILLDECREASEGRADUALLYBECAUSEOFECONOMICSOFSCALEANDLEARNINGEFFECT.3THELELATCDLAWSANDREGULATIONSWILLBEIMPROVED,ANDSELFDISCIPLINEWILLBEFORMED,WHICHWILLIMPROVETHEAPPLYINGCONDITIONSOFOFFSHORECAGE4IFTHERISKFROMTYPHOONMADFISHINFECTIONSISTAKENINTOACCOUNTED,THEPRODUCTIONCOSTADVANTAGEOFOFFSHORECAGECULTUREHASBEENEMER衄INAWORD,ITISANINEVITABLETRENDTHATOFFSHORECAGECULTUREWILLDEVELOPRAPIDLY,ANDOFFSHOMCULTUREWILLBETHEDLRE商ONOFFISHMARICULTUREINCHINAINADDITION,THEARTICLEPOINTSOUTTHATTHELAGGARDANDSMALLSCALEMANAGEMENTPATTERNISTHESOURCEOFTHEHIGHPRODUCTIONCOSTOFOFFSHOREFISHCULTURE.TOKEEPFISHMARICULTUREINDUSTRYDEVELOPINGHEALTHILY,THEGOVERNMENTOFOURCOUNTRYSHOULDSTUDYTHEADVANCEDEXPERIENCESOFFOREIGNCOUNTRIES,ESTABLISHRATIONALDEVELOPMENTPOLICY,ANDHELPFISHMARICULTUREINDUSTRYESTABLISHTHEMODEMENTERPRISESYSTEM.K盯WORDSCAGE;MARICZDTWE;MARINEFISH;COMPARATIVEECONOMICS;BALANCEPOINT2
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簡(jiǎn)介:’譬7S娩57碩士學(xué)位論文沈陽地區(qū)玉米氮磷效應(yīng)模型模擬尋優(yōu)及肥料經(jīng)濟(jì)學(xué)研究研究生金柏年導(dǎo)師韓曉日教授專業(yè)植物營(yíng)養(yǎng)學(xué)研究方向植物營(yíng)養(yǎng)與施肥沈陽農(nóng)業(yè)大學(xué)二OO五年六月沈陽農(nóng)業(yè)大學(xué)碩士學(xué)位論文摘要玉米作為一種重要的糧食、飼料和經(jīng)濟(jì)兼用作物,在世界各地有著悠久的栽培歷史。世界上很多國家把玉米產(chǎn)業(yè)的開發(fā)作為發(fā)展農(nóng)業(yè)的重要手段。我國是世界上僅次于美國的第二大玉米生產(chǎn)國,自20世紀(jì)90年代以來,我國玉米施肥技術(shù)有了較大的突破性進(jìn)展。但是,我國玉米的種植范圍廣、氣候條件和土壤條件差異大,玉米施肥仍然存在不少問題,尤其是施肥量偏多和氮磷肥配施不合理等現(xiàn)象普遍存在。遼寧作為我國重要玉米區(qū)之一,農(nóng)民盲目施肥的現(xiàn)象同樣普遍存在,主要根據(jù)往年習(xí)慣和肥料市場(chǎng)價(jià)格來旌肥。為提高我省農(nóng)業(yè)總體水平,增加農(nóng)民收入,科學(xué)施肥至關(guān)重要,這是保證全省農(nóng)業(yè)增產(chǎn)、農(nóng)業(yè)增收、農(nóng)村穩(wěn)定的戰(zhàn)略措旋。本試驗(yàn)通過對(duì)2001~2003年沈陽地區(qū)較為典型的氮磷施肥量及對(duì)應(yīng)產(chǎn)量的田間試驗(yàn),劃分為低、中、高三類土壤基礎(chǔ)肥力,以小于300KG/667M2為低產(chǎn)田300~500KG/667M2為中產(chǎn)田;大于500KG/667M2為高產(chǎn)田,經(jīng)過篩選后,用剩余的85塊典型地塊的數(shù)據(jù),分別建立低、中、高三種基礎(chǔ)肥力水平的目標(biāo)函數(shù)的氮、磷效應(yīng)模型Y286.1011.83N8.89PO.35N2一O.22P20.0128NPY454.278.01N8.75P一0.27N2一O.38P20.0168NPY515.1010.14N6.18PO.34N20.18P2一O.0414NP并分別檢驗(yàn)三個(gè)模型的可用性。經(jīng)過計(jì)算,三個(gè)模型的W、V值均小于零,說明由方程繪制的等產(chǎn)線圖為橢圓形,且效應(yīng)曲線為凸形,意味著等產(chǎn)線中心為最大值,可以用來計(jì)算最大及最佳施肥量。多年來,有關(guān)的科研單位和科技人員在合理施肥方面作了大量的研究工作,但肥料應(yīng)用的經(jīng)濟(jì)學(xué)分析方面是該領(lǐng)域的一個(gè)薄弱的環(huán)節(jié),所以在計(jì)算
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簡(jiǎn)介:獨(dú)創(chuàng)性聲明本人聲明所呈交的學(xué)位論文是本人在導(dǎo)師指導(dǎo)下進(jìn)行的研究工作和取得的研究成果,除了文中特別加以標(biāo)注和致謝之處外,論文中不包含其他人已經(jīng)發(fā)表或撰寫過的研究成果,也不包含獲得西南政法大學(xué)西南政法大學(xué)或其他教育機(jī)構(gòu)的學(xué)位或證書而使用過的材料。與我一同工作的同志對(duì)本研究所做的任何貢獻(xiàn)均已在論文中作了明確的說明并表示了謝意。學(xué)位論文作者簽名簽字日期年月日學(xué)位論文版權(quán)使用授權(quán)書本學(xué)位論文作者完全了解西南政法大學(xué)西南政法大學(xué)有關(guān)保留、使用學(xué)位論文的規(guī)定。特授權(quán)西南政法大學(xué)西南政法大學(xué)可以將學(xué)位論文的全部或部分內(nèi)容編入有關(guān)數(shù)據(jù)庫進(jìn)行檢索,并采用影印、縮印或掃描等復(fù)制手段保存、匯編以供查閱和借閱。同意學(xué)校向國家有關(guān)部門或機(jī)構(gòu)送交論文的復(fù)印件和電子文檔。(保密的學(xué)位論文在解密后適用本授權(quán)說明)學(xué)位論文作者簽名導(dǎo)師簽名簽字日期年月日簽字日期年月日碩士學(xué)位論文以異化勞動(dòng)為核心的法以異化勞動(dòng)為核心的法哲學(xué)批判哲學(xué)批判基于社會(huì)公平正義角度解讀基于社會(huì)公平正義角度解讀18441844年經(jīng)濟(jì)學(xué)哲學(xué)手稿年經(jīng)濟(jì)學(xué)哲學(xué)手稿RESEARCHONMARX’SLEGALPHILOSOPHYCRITICISMOFWHICHESTRANGEDLABISTHECEANINTERPRETIONOF“ECONOMICPHILOSOPHICALMANUSOF1844”FROMTHEANGLEOFSOCIALFAIRNESSJUSTICE作者姓名江優(yōu)優(yōu)指導(dǎo)教師靳松副教授西南政法大學(xué)SOUTHWESTUNIVERSITYOFPOLITICALSCIENCELAW
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簡(jiǎn)介:⑧博士學(xué)位論文三種經(jīng)濟(jì)絨螯整的遺傳學(xué)和形態(tài)學(xué)研究研究生姓名搬廣艇指導(dǎo)教師姓名贏囂舅煎授申慵學(xué)位級(jí)別盛專業(yè)名稱攔擅掌論立薔辯B期』鯉量生直_且日擘位授予日鞲一鯉QI蔓旦且中圍海洋太學(xué)種經(jīng)濟(jì)絨螯蟹的遺傳學(xué)和形態(tài)學(xué)研究體、其他日本絨螯蟹群體及沖繩絨螯蟹群體該基因序列長(zhǎng)度相同,均為376BP堿基含量相似,A、T、G、C的平均含量分別為294%、447%、71%、18,8%。密碼子的使用頻率不同,偏好使用第三位為A或者T的密碼子,而第三位為G的密碼子幾乎不用。7、線粒體DNA12SRRNA基因片段分析表明,群體內(nèi)的最大遺傳距離為072%,群體間的最大遺傳距離為24%。線粒體DNAND2基因片段分析表明,群體內(nèi)的最大遺傳距離為080%,群體間的最大遺傳距離為399%。系統(tǒng)發(fā)育分析表明,沖繩絨螯蟹群體處在一個(gè)非常顯著的位置上,單獨(dú)聚為一支;中華絨螯蟹群體、合浦絨螯蟹群體及其他日本絨螫蟹群體也各自聚為獨(dú)立的一支。8、形態(tài)學(xué)個(gè)體聚類分析表明,三種絨螯蟹分成完全獨(dú)立的三個(gè)組,備組分別代表一個(gè)獨(dú)立的種群,不同種群的個(gè)體之間不出現(xiàn)個(gè)體交叉的現(xiàn)象;而日本絨螯蟹兩個(gè)群體的個(gè)體相互有交叉,不能被完全分開。中華絨螯蟹與合浦絨螯蟹首先聚在一起,說明兩者的親緣關(guān)系較近。9、單因子方差分析結(jié)果顯示,中華絨螫蟹與合浦絨螯蟹之間有10個(gè)變量C/B、D/A、F/A、G/A、H/I、J/A、K/A、M/L、M/N、O/P存在顯著差異,中華絨螯蟹與日本絨螯蟹之間有10個(gè)變量C/B、E/A、F/A、G/A、H/I、J/A,K/A、M/L、M/N、O伊存在顯著差異,合浦絨螯蟹與日本絨螯蟹之間有9個(gè)變量C/B、D/A、G/A、H/I、J/A、K/A、M/L、M/N、O/P有顯著差異。關(guān)鍵詞絨螫蟹同工酶線粒體序列形態(tài)學(xué)
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簡(jiǎn)介:Y773488分類號(hào)密級(jí);單位代碼10019學(xué)號(hào)LB02124‘專峨差孳文等博士學(xué)位論文中國北方主要農(nóng)業(yè)生態(tài)區(qū)土壤有機(jī)碳儲(chǔ)量變化及其經(jīng)濟(jì)學(xué)解釋THEECONOMICDEFMITIONFORTHECHANGEOFSOILORGANICCARBONSTORAGEINNORTHERNAGROECOLOGICALZONESOFCHINA研究生捻艷指導(dǎo)教師韭凰塞救援申請(qǐng)學(xué)位門類級(jí)別盔堂煎專業(yè)名稱堡坐一研究方向垃瓷源籃壁所在學(xué)院盜源皇疊撞堂院二OO五年六月改革的兒次重要變遷,特別應(yīng)用制度變遷理論解釋了家庭聯(lián)產(chǎn)承包責(zé)任制等農(nóng)業(yè)政策制度對(duì)農(nóng)業(yè)經(jīng)營(yíng)行為的影響,從而對(duì)土壤有機(jī)碳儲(chǔ)量變化的影響。結(jié)合相應(yīng)的野外調(diào)查和統(tǒng)計(jì)資料,發(fā)現(xiàn)經(jīng)濟(jì)地理環(huán)境強(qiáng)烈地影響著土壤有機(jī)碳儲(chǔ)量發(fā)生變化。L;管經(jīng)濟(jì)發(fā)展水平處于何種階段,經(jīng)濟(jì)的發(fā)展都能夠促使農(nóng)戶增加對(duì)土地的投入,經(jīng)濟(jì)發(fā)達(dá)地區(qū)有充足的資金和市場(chǎng)保障,通過農(nóng)業(yè)結(jié)構(gòu)調(diào)整會(huì)增加對(duì)士地的投入;經(jīng)濟(jì)落后地區(qū)要追求作物高產(chǎn),促使土地投入也不斷增加使得作物經(jīng)濟(jì)產(chǎn)量和生物產(chǎn)量獲得極大的提高,促使耕地土壤有機(jī)碳含量增加。應(yīng)用級(jí)差收益理論解釋黃淮海平原區(qū)和黃土高原區(qū)土壤有機(jī)碳儲(chǔ)量增加,是由于為了獲得級(jí)差收益II,追加土地投入的結(jié)果。東北區(qū)土壤有機(jī)碳減少,是因?yàn)閼{借優(yōu)越的土壤自然養(yǎng)分,通過級(jí)籌收益I獲得生產(chǎn)上的收益,而以土壤有機(jī)碳的損耗為代價(jià)。追求不同的土地級(jí)差收益,引起上壤有機(jī)碳儲(chǔ)量發(fā)生變化。通過對(duì)中國農(nóng)戶的社會(huì)心理分析,在追求土地收益最大化的過程中,如何安排土地經(jīng)營(yíng)規(guī)模以及十地利用選擇等。住這個(gè)過程中不同地區(qū)的,不同收入水平的農(nóng)戶的土地投入不同,從而對(duì)土壤有機(jī)碳儲(chǔ)量變化的影響也不同。將耕地土壤有機(jī)碳儲(chǔ)量變化對(duì)大氣環(huán)境造成的外部性進(jìn)行定量計(jì)算,結(jié)果表明黃淮海平原區(qū)和黃土高原區(qū)耕地土壤增加的有機(jī)碳量和農(nóng)業(yè)生產(chǎn)消耗的碳量相比,耕地土壤可能還是碳匯東北區(qū)則有可能是碳源。6對(duì)我國氣候談判所面臨的壓力進(jìn)行了分析。保證經(jīng)濟(jì)高速發(fā)展和糧食安全是我國現(xiàn)今重要的任務(wù),我國作為溫室氣體排放的第二大國盡管暫時(shí)不承擔(dān)減排的任務(wù),但是承擔(dān)的國際外交壓力越來越大。同時(shí),也應(yīng)該抓住氣候外交中的機(jī)遇,對(duì)我國農(nóng)業(yè)實(shí)施清潔發(fā)展機(jī)制的可行性進(jìn)行了分析。CDM項(xiàng)目可以應(yīng)用于節(jié)能和提高能效;開發(fā)清潔能源;推廣生物質(zhì)能源發(fā)展節(jié)水農(nóng)業(yè);合理使用土地;改良作物品種,培育和選用能源作物等諸多方面。7從資源安全的角度分析了土地集約利用以及土壤有機(jī)碳庫的問題。我國必須堅(jiān)持糧食的基本自給,才能保障國家安全。探討了我國未來發(fā)展的模式應(yīng)該走“約束條件下的可持續(xù)發(fā)展模式”,E口允許生態(tài)環(huán)境付出一定代價(jià)實(shí)現(xiàn)經(jīng)濟(jì)的高速發(fā)展,但環(huán)境惡化的狀況必須在可預(yù)見的未來可以逆轉(zhuǎn)。關(guān)鍵詞農(nóng)業(yè)生態(tài)區(qū),土壤有機(jī)碳,SOC,儲(chǔ)量,經(jīng)濟(jì)學(xué)解釋
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簡(jiǎn)介:新疆農(nóng)業(yè)大學(xué)碩士學(xué)位論文孜然芹生物學(xué)特性及主要經(jīng)濟(jì)性狀形成的研究姓名甘付華申請(qǐng)學(xué)位級(jí)別碩士專業(yè)蔬菜學(xué)指導(dǎo)教師高杰20060601ABSTRACTWITHTILEAIDOFOPENCOLINTRYOBSERVANCE0NTHCSPOT,BIOSTATISTICS,NO皿ALREGILLATIONP缸A伍NTECHNIQUESEIC,THEMORPH0IO百CAICHARACTCLBIOLOGI強(qiáng)LCHARACTER,YJEIDCOMPONENT,療UITMORPHAANDDISSECTION,THEFO珊ATION0FVOLATILEOILANDSEED啊90RWERESTLLDIED,THCMAINRESULTSINTHISREPORTAREASFMLOWS1THEREWCREVERYSIGILIFICANCCORRELA60NBETWEENSIⅡ酉EPIANTYIELDARIDTLLENUMBEROF∞MPOUNDUMBELS,UMBDLLLLES,BRANCHES,E骶CTIVEBRANCHES,SEEDNUMBERPERPL粕TANDTHOUSANDKEMELWEIGHT,T11EIRCORRDADONCOE銜CIEⅡTSWEREO9040’O8860,O8409,O8336,O8659ANDO3925“RESPECLIVELY2THERESLLLTSOFPATHANALYSISINDICATEDTHATPL柚THEIGHT,NOOFBR柚CHES,SEEDNUMBERPERPLANTANDTHOUSALLDKEMEL、、№IGHTWEREIMPORTAMFACTORSFORSIN甜EPLANTYIELD,ANDMEDIFECTE任ECTSOFSEEDNUMBERPERPLANTANDCHOUSALLDKCMELWEI曲TWERES缸0NGCRT11ANTHAT0FPLANTHEIGHTANDNOOFBRANCHES3THE皿胤HEI曲T,№OFC咖叩OUNDUINBEL,BRANCH,E£FECTIVEBRAILCH,SECONDGROWTH,THIRDGROWTH,SEEDNUMBERPERPLANT,THOUSAND魯FAINWEIGILTANDSIN西EPLANTYIDDWEREDECREASEDW“HTHEDENSITYJN臼EASJNGGENERALLYLNERELATI徹BETWEEN№OFFIRSLORDERBFANCHANDPLAJLTDEILSITYWASN’TPROMINENT;T11EYIEID0F212MILLIONPL鋤TPERHM2WASCHEHI曲EST,ANDMEPLAILT’SINDIVIDUALVI90ROF22MILLIONPLAMPERHM2WASALSOOBVIOUS;TLLEFIRSTORDEFBRANCHDIDTHESTRONGESTCONTRIBUTIONSTOYIELDOFSIN罾EPLANT4DRYMATTERWASMAILL】YTFANSLATEDINTO丘|ILCTUSINT11EPFOCESSOFBECOMINGMATUFE,ABOUT60%OFTOTAL,TONEXTWASCAULOMA柚DR鋤US,ABOUT37%,TOLAST、ⅣASRADIX51’HEPMCCSSOF£HEFOFMATION0FV01AIIEOJLINFNLJTCANBEDIVIDEDIN幻THREESLAGESDEVELOPMENTSTAGE,ISOLATIONSTAGE,ANDDISINTEGRATIONSTAGE;THEENDOCRINASTRUCTUREOFTHEFRUITWASLYSIGENOUSSECRETORYCANEL6NEREWASPMMINENTDIFFE咖CEINTHEGERMJNATIONINDEXCSOFCUMJNSEEDLHATHADBEENSTOREDFORDI丘B(yǎng)RENTTIMEBEINGTREATEDW汕30%PEG,50M∥LGA了’ACERTAINCONCENIRATIONOFNAHC03ANDHYDRATION~DEHYDRALIONTREATMENT,COULDINCFEASEGERMINATIONINDEXESOBVIOUSLYOFTHECUMINSEEDWHICHHADAIOWGE珊INATIONKEYWORDSCHMINⅡMEY聊FNⅣ川L,BI0109ICALCHAMCTCR,YIELDCOMPONENT,VOLATILEOIL,SEEDVIGOR
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簡(jiǎn)介:貴州大學(xué)2016屆碩士論文I貴州大學(xué)2016屆碩士研究生學(xué)位論文都柳江鲇形目主要經(jīng)濟(jì)魚類種質(zhì)的遺傳學(xué)評(píng)價(jià)學(xué)科專業(yè)水產(chǎn)養(yǎng)殖研究方向水產(chǎn)動(dòng)物遺傳育種與種質(zhì)資源學(xué)導(dǎo)師代應(yīng)貴教授研究生劉偉中國﹒貴州﹒貴陽2016年6月分類號(hào)S9174論文編號(hào)2013022073密級(jí)貴州大學(xué)2016屆碩士論文II目錄目錄目錄II摘要V第一章文獻(xiàn)綜述11、魚類種質(zhì)資源研究概述111種質(zhì)資源的概念112國內(nèi)外魚類種質(zhì)資源研究的概況12魚類種質(zhì)資源的遺傳學(xué)評(píng)價(jià)221魚類種質(zhì)資源的遺傳學(xué)評(píng)價(jià)222魚類種質(zhì)資源遺傳學(xué)評(píng)價(jià)研究的現(xiàn)狀223魚類種質(zhì)資源遺傳學(xué)評(píng)價(jià)的方法224魚類線粒體DNA概述5241魚類線粒體的組成與特征5242魚類MTDNADLOOP的研究5243魚類線粒體CYTB基因的研究53、都柳江鲇形目主要經(jīng)濟(jì)魚類631鲇的研究概況632粗唇鮠的研究概況733斑鱯的研究概況84、本研究的目的及意義9第二章都柳江鲇種群的遺傳多樣性及評(píng)價(jià)101材料與方法1011試驗(yàn)材料1012試驗(yàn)試劑1013試驗(yàn)器材1014試驗(yàn)方法10141DNA模板制備10142DNA檢測(cè)11143PCR擴(kuò)增11144測(cè)序13145數(shù)據(jù)處理142結(jié)果1421都柳江鲇種群MTDNACYTB基因序列多態(tài)性14211都柳江鲇種群MTDNACYTB基因序列組成與變異14212都柳江鲇種群CYTB基因編碼的氨基酸序列變異1522都柳江鲇種群MTDNADLOOP序列多態(tài)性16221都柳江鲇種群MTDNADLOOP序列的組成和變異16222都柳江鲇MTDNADLOOP的結(jié)構(gòu)1723都柳江鲇種群的遺傳多樣性及NJ系統(tǒng)樹183討論2031都柳江鲇種群MTDNACYTB基因和DLOOP序列的組成和變異20311都柳江鲇種群MTDNACYTB基因和DLOOP序列的堿基組成特征20
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簡(jiǎn)介:中國農(nóng)業(yè)大學(xué)博士學(xué)位論文用生物學(xué)和經(jīng)濟(jì)學(xué)方法對(duì)我國集約化養(yǎng)豬生產(chǎn)的研究姓名鄭華申請(qǐng)學(xué)位級(jí)別博士專業(yè)動(dòng)物遺傳育種與繁殖指導(dǎo)教師吳常信20060601RESEARCHONCHINESEINTENSIVEPIGPRODUCTIONBYBIOLOGICALANDECONOMICMETHODSZHENGHUADIRECTEDBYPROFESSORWUCHANGXINCOLLEGEOFANIMALSCIENCEANDTECHNOLOGYCHINAAGRICULTURALUNIVERSITYBERING100094ABSTRACTFOURYEARS’ANNUALPRODUCTIONRECORDSOF257FARMSOF244824SOWSINUSGCONLINEBENCHMARKINGPROGRAMWERECOLLECTEDTOANALYZETHECURRENTLEVELOFCHINESEINTENSIVEPIGPRODUCTIONANDCOMPARETHELEVELSOFTHOSEINUSA,CANADAANDBRAZILTHENATIONALMARKETQUOTATIONRELATEDTOPIGPRODUCTIONFROM1995ANDTHEHOGPRICESINHONGKONGOFTHEPASTTHREEYEARSWERESTUDIEDTOREVEALTHEFLUCTUATIONRULESOFCHINASHOGCIRCLETHEDETERMINISTICBINECONOMICFARMMODELSINCLUDINGBIOLOGICALEFFICIENCYOFCOMMERCIALPIGFARM,SOWFARM,HYBRIDMULTIPLYINGFARM,DUROCNUCLEARFARMANDLANDRACEYORKSHIRENUCLEARFARMWERECONSTRUCTEDANDPASSEDTHESENSITIVEANALYSISINORDERTOBUILDTHEMEDIALBENCHMARKOFDIFFERENTTYPESOFCURRENTCHINESEINTENSIVEPIGFARMS,THEBUSINESSANALYSISBASEDOLLTHEIMPROVEDBREAKEVENPOINTANALYSISFORMULAEWASCONDUCTEDTHEECONOMICEVALUATIONINDEXOFFARMPRODUCTIONLEVELEEIFPLWASBUILTBASEDOHTHESTUDYOFMARGINALPROFITOFTHEMAINPRODUCTIONTRAITSANDWASAPPLIEDTOTHEECONOMICEVALUATIONOFDISEASELOSSESOFPIGFARMANDOFDIFFERENTMATINGWAYSANDOFDIFFERENTNUTRITIVEFEEDSTUFFSTHEBREEDINGOFQUALITYPIGWASDISCUSSEDONTHEBASISOFTHEMODELOFCOMMERCIALPIGFARMINCLUDINGTHEUTILIZATIONOFCHINESEINDIGENOUSSWINETHEDAILYFEEDINTAKEANDBODYWEIGHTRECORDS,INCLUDING4118RECORDSOF45DUROCMALES,4595RECORDS0F49LANDRACEMALEAND4664RECORDSOF50YORKSHIREMALES,ANDSTAGERECORDSOF66HEADSOFYORKSHIREOFFSPRINGPRODUCEDBYNEWLYIMPORTEDGENETICSFROMUSAWERESTUDIEDTODESCRIBETHERULESOFFEEDINTAKEANDGROWTHTHEOPTIMALSLAUGLLTERWEIGHTWASALSOSTUDIEDTHEMAINRESULTSANDCONCLUSINUSAREASF0110WS1THELITTERSPERSOWPERYEARWEANEDPERSOWPERYEARNUMBERBORNALIVEPERLITTERFARROWINGRATEANDMORTALITYRATEOFTHEAVERAGEPRODUCTIONLEVELSOFCHINESEPIGFARMS’BENCHMARKINGSYSTEMARE213,1782,901,7401PERCENTSAND1461PERCENTSRESPECTIVELYTHEDIFFERENCESOFPRODUCTIONLEVELSAMONGFARMSAREBIGWHEREASAREINCONSPICUOUSBETWEENYEARSTHECOMPREHENSIVEPRODUCTIONLEVELSOFLARGESCALEFARMSAREALWAYSTHEBESTCOMPAREDWITHTHOSEOFTHEMEDIUMANDSMALJSCALEFARMS2THEANNUALPROFITOFTHESIMULATEDCOMMERCIALPIGFARM,SOWFARM,HYBRIDMULTIPLYINGFARM,DUROCNUCLEARFARMANDLANDRACEYORKSHIRENUCLEARFARMOF600SOWSUNDERGIVENSITUATIONARE05601,01299,1005313409AND16410MILLIONSRMBRESPECTIVELYTHEFEEDCONVERSIONRATIOOFTHEFIVETYPICALFARMSIS3106,3911,3190,3,181AND3203RESPECTIVELYTHEEFFICIENCYOFNETENERGYUTILIZATIONOFTHEFIVEFARMSISRESPECTIVELY2769,3298,2825,2832AND2848MJ/KG11
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簡(jiǎn)介:內(nèi)蒙古農(nóng)業(yè)大學(xué)碩士學(xué)位論文蕤核繁殖生物學(xué)特性及經(jīng)濟(jì)價(jià)值的研究姓名斯琴申請(qǐng)學(xué)位級(jí)別碩士專業(yè)草業(yè)科學(xué)指導(dǎo)教師敖特根20070501THESTUDYONPROPAGATIONALBIOLOGICALCHARACTERISTICSANDECONOMICVALUEOFPRINSEPIAUNIFLORABATALABSTRACTTHESTUDYONTHEPROPAGATIONALBIOLOGICALCHARACTERISTICSANDNUTRITIONALVALUEOFPRINSEPIAUNIFLORABATAIWASCARRIEDINTAOLEGACHAGUCHENGCHUANCOUNTYEFTUOKEQIANQIORDOSCITYFROM2005TO2006THESTUDYWASTHEFIRSTTOMAKEASERIESOFEXPLORATIONINCLUDINGSEEDPROPAGATION,CUTTINGPROPAGATION,F(xiàn)LOWERINGHABIT,POLLINATIONHABIT,MESOCARPNUTRIENTCOMPONENTSANDTHEFIRSTYEARSTEMANDLEAFNUTRIENTCOMPONENTSOFPRINSEPIAUNIFLORABATALANDITALSOGAVEASCIENTIFICBASISTOTHEDEVELOPMENTANDULTILIZATIONOFPRINSEPIAUNIFLORABATAL。THERESULTSHOWEDTHATTHESEEDCOATSCOULDAFFECTTHEGERMINATIONRATEOFPRINSEPIAUNIFLORABATALANDTHEEFFECTOFMECHANICALTREATMENTWASTHEBESTDURINGTHEFOURDIFFERENTTREATMENTTHEREGREENINGSTAGEOFPRINSEPIAUNIFLORABATALWASINEARLYMIDDLEMARCHANDTHEBUDDINGPERIODWASINTHEENDOFAPRIL,THETIMEOFENDFIOWERINGWASINAPRIL30TH1RHCWHOLEBUNDLEFLOWERINGPERIODWASFROM3TO5DAYS,BISEXUALFLORALANDMAINLYWITHNATURALPOLLINATIONTHETIMEOFFRUITTURNINGREDANDFRUITRIPENINGWASINMIDDLEJULYⅡTHEREWASNOEXTERNALFORCE,THEFRUITWASSTAYEDINTHEBRANCHUNTILNOVEMBERTHEMESOCARPOFPRINSEPIAUNIFLORABATALCONTAINEDSIXTEENAMINOACID,THETOTALQUANTITYWAS6255MG/KG,ALSOINCLUDINGFIVEKINDSOFVITAMINS,SUCHASVITAMINBLVITAMINB2VITAMINC;CAROTENEANDFC,LICACID皿ECONTAININGOFCAROTENE43035MG/KGWASTHEHIGHESTAMONGTHEMTHENTHECONTAININGOFVITAMINC18660MG/KGINTHEMESOCARPOFPRINSEPIAUNIFLORABATALALSOEXISTEDININORGANICELEMENTS,SUCHASCALCIUMRPHOSPHORUS,ZINC,IRON,SELENIUMANDSOONANDTHECONTAININGOFCALCIUM54850MG/KGWASTHEHIGHESTAMONGTHEMTHECONTAININGNUTRITIONOFSTEMANDLEAFWASALSOHIGHERTHECONTAININGOFCRUDEFATWAS544%,CRUDEPROTEINCONTENTWAS1264%1,CALCIUMCONTENTWAS091%,ANDPHOSPHORUSCONTENTWAS035%THEPRINSEPIAUNIFLORABATALISASTRAINBUNDLESPECIESWHICHHASMANYEXCELLENTFEATURES,ALSOASHRUBWHICHISUNUTILIZEDANDWHICHHASSIGNIFICANTECOLOGICALANDECONOMICVALUETHEPRINSEPIAUNIFLORABATALISVERSATILEANDITSECONOMICVALUEISQUITEHIGH,ESPECIALLYTHENUCLCOLUSOFPRINSEPIAUNIFLORABATALHASHEALTHPROTECTIONFUNOTION
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簡(jiǎn)介:謹(jǐn)以此論文獻(xiàn)給我的導(dǎo)師和所有關(guān)心我的朋友們。張馨月日
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上傳時(shí)間:2024-03-02
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