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最大概率原理在农田生态系统中的应用 总被引:6,自引:0,他引:6
最大概率原理在农田生态系统中的应用姚建民(山西省农科院农业资源综合考察研究所,太原030006)马蓉丽(山西省农科院蔬菜研究所,太原030006)ApplicationofMaximumProbabilityPrincipleinFarmlandEcosystem¥.YaoJianmin(InsliluteforCom-prehensiveSurveyofAgriculturalResources,ShanxiAcademyofAgriculturalSciences,Taiyuan030006),MaRongli(InslituteofVegetableResearcgh,ShanxiAcademyofagriculturalSciences,Taiyuan(030006).Chinese,JpurnalofEcology,1993,12(4):58-60.Inordertostrengthenthepracticabilityofmaximumprobabilityprinciple,thispapergivesoutsomees-sentialconditionsneededforapplyingth 相似文献
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柞蚕林生物生产力和干物质转化研究 总被引:5,自引:0,他引:5
柞蚕林生物生产力和干物质转化研究温达志,杨思河(中国科学院华南植物研究所,广州510650)(中国科学院沈阳应用生态研究所,110015)姜波(辽宁省蚕业科学研究所,凤城118101)BioproductivityandDryMatterTransferofTussah-FeedingOakForest¥WenDazhi(SouthChinaInsti-tuteofBotany,AcademiaSinica,Guangzhou510650),YangSihe(InstituteofAppliedEcology,A-cademiaSinica,Shenyang110015),JiangBo(InstituteofSericulturalScience,Fengcheng,LiaoningProvince113100).ChineseJournalofEcology,1993,12(1):5-10.ThepresentstudydealswiththebioproductivityanddrymattertransferofChineseTussah-feedingoakforestinhillyareaofe 相似文献
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TheApproachandApplicationofGeneTargetingWANGYa-PingZHUZuo-Yan(InstituteofHydrobiology,TheChineseAcademyofSciences,Wuhan430072... 相似文献
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中国中亚热带地区引种玉米的气候生态适宜性分析翟玉顺,章熙谷(中国科学院南京土壤研究所生态室,210008)(南京农业大学农学系,210014)Eco-climaticSuitabilityofIntroducedCorninMidSub-tropicalRegionofCbina¥.ZhaiYushun(InstituteofSoilScience,AcademiaSinicaNanjing,210008),ZhangXigu(NanjingAgriculturalUniversity,Nan-jing,210014).ChineseJournalofEcology,1993.12(2):73-75.Throughanalyzingtheecologicalsuitabilityofintroducedcorntosunshine-temperature-precipitationanditsclimaticpotentialproductivityinmidsub-tropicalregionofChina,itisfoundthatAprilandthefirstandsecondten-daysofM 相似文献
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新疆农业绿洲生态建设的探讨 总被引:1,自引:0,他引:1
新疆农业绿洲生态建设的探讨夏爱林(新疆农业科学院土壤肥料研究所,乌鲁木齐830000)AnApproachtotheEcologicalConstructionofAgriculturalOascsinXinjiang¥XiaAilin(InstituteofSoilandFertilizers,XinjiangAcademyofAgriculturalSciences,Uromqi830000).ChineseJournalofEcolo-gy,1993,12(1):67-70。Comparedwithotheraridareasoftheworld,theagriculturaloasesinXinjiangpossessthefollowingcharacters:1.theyaredesertandirrigated,andwateristhemainfactorfortheirsubsistenceanddevel-oprnent,2.thereareabundantlight,heatandwaterresourcesandgreatpotentialforincreasingtheirprod 相似文献
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鲁西北平原高产夏玉米生育模式董振国,鲁全国(中国科学院地理研究所,北京100101)DevelopmentMOdelofHighYieldingSummerCornonNortbwestSkandongPlain¥DongZhenguo;LuQuanguo(InstituteofGeography,ChineseAcademyofSciences,Beijing100101),ChineseJournalofE-colegy,1993,12(2):69-72.Erectandplanevarietiesofcornhavealeafinclinationof65°and50°andtheiroptimumplantingdensitiesare75000-82000and52500-60000stems·ha ̄(-1).Theleafareaindexatearsproutingstageandleafareaday(LAD)fortheformerarerespectively5.5-6.0and360-400,whilethoseforthelatterare3.5-4.0and260-300.TheL 相似文献
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祁连山植被水文效应的多层次Fuzzy综合评判 总被引:8,自引:0,他引:8
祁连山植被水文效应的多层次Fuzzy综合评判车克钧,傅辉恩(甘肃省张掖祁连山水源林研究所734000)Multiple-LevelFuzzyComprehensiveEvaluationonHydrologicalFunctionsofVegetationsontheQilianMountains¥.CheKejun;FuHuien(QilianMountainsInstituteofForestforWaterSourceConservation,Zhangye,GansuProvince734000).ChineseJournalofEcology,1993,12(3):31-35.BymeansofmuItiple-levelfuzzycomprehensiveevaluation,thehydrologicalfunctionsoffourvegetationtypesareanalyzed.PiceacrassifoliaforestisshowntobethebesttypeforwaterconservationonQilianmountains,Sabinaprzewlskiiforesta 相似文献
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石松生物学特性及生境特点的观察叶茂宗,叶升儒(浙江省科学院亚热带作物研究所温州325000)(温州师范学院生物系325000)BiologicalPropertiesandHabitatCharacteristicsofLycopodiaceae¥.YeMaozhong(InstituteofSubtropi-calCrops,ZhejiangAcademyofSciences,Wenzhou325000),YeShengru(WenzhouNormalCOllege,325000).ChineseJournalofEcology,1993,12(3):19-22。SiteinvestigationsshowthatthegrowthanddevelopmentofLycopodiaceaeexhibitobvioushydrotropismandgeotropism,anditsdistributionaggregatelyconcentratesonthesidesofvaIley300-1400mabovesealevelandbrookbanks.whereveritisdistributed,th 相似文献
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洞庭湖滩血吸虫易感地带保水生态灭螺的试验研究张元培,朱南屏(湖南省水产科学研究所沅江413100)(湖南省华容县血防站414200)EcologicalEIiminationofSnail(Oncomelania)byRctainingWaterinBloodFluke(Schistosoma)Suscepti-bleRegionsAroundDongtingLake¥.ZhangYuanpei(InstituteofFisheriesResearchofHunanProvince,Yuanjiang413100),ZhuNanbing(StationofSnailFeverControlofHuarongCounty,HunanProvince,414200).ChineseJournalofEcology,1993,12(3):23-25.Inbloodfluke(Schistosoma)susceptibleregionsofthelakebeach,experimentsofwaterinundatedelimi-natingsnail(Oncomelania)arecarriedoutbybuil 相似文献
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生态位理论及其在森林生态学研究中的应用 总被引:43,自引:4,他引:43
生态位理论及其在森林生态学研究中的应用朱春全(中国林业科学研究院林业研究所,北京100091)NichcTheoryanditsApplicationinForestEcology¥.ZhuChunquan(InslituteofForestry,ChineseAcademyofForestrySciences,Beijing100091),ChineseJournalofEcology,1993,12(4):41-46.Thedevelopmentofnichetheoryanditsapplicationinforestecologicalstudyarereviewedinthispaper.Itispointedoutthatthefunctionalactionofplantunitwasnotinvolvedinpreviousnicheconcepts,Theparticularitiesofnicheofplantunitarediscussedandanewmethodisdevelopedtodetermineitwithpho-tosyntheticproductionasafunct 相似文献
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Profiles of SARS-CoV-2 RNA and Antibodies in Inpatients with COVID-19 not Related with Clinical Manifestation: A Single Centre Study 下载免费PDF全文
Zhao Li Gao Ruqin Lu Roujian Wang Huijuan Deng Yao Niu Peihua Jiang Fachun Huang Baoying Liang Jiwei Jia Jing Zhang Feng Wang Wenling Wu Guizhen Tan Wenjie 《中国病毒学》2021,36(5):1088-1092
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RICHARD E. NORRIS 《Botanical journal of the Linnean Society. Linnean Society of London》1991,106(1):1-40
Comprises species occurring mostly in subtidal habitats in tropical, subtropical and warm-temperate areas of the world. An analysis of the type species, V. spiralis (Sonder) Lamouroux ex J. Agardh, a species from Australia, establishes basic characters for distinguishing species in the genus. These characters are (1) branching patterns of thalli, (2) flat blades that may be spiralled on their axis, (3) width of the blade, (4) primary or secondary derivation of sterile and fertile branchlets and (5) position of sterile and fertile branchlets on the thalli. Application of the latter two characters provides an important basic method for separation of species into three major groups. Osmundaria , a genus known only in southern Australia, was studied in relation to Vidalia , and its separation from the Vidalia assemblage is not accepted. Species of Vidalia therefore are transferred to the older genus name, Osmundaria. Two new species, Osmundaria papenfussii and Osmundaria oliveae are described from Natal. Confusion in the usage of the epithet, Vidalia fimbriala Brown ex Turner has been clarified, and Vidalia gregaria Falkenberg, described as an epiphyte on Osmundaria pro/ifera Lamouroux, is revealed to be young branches of the host, Osmundaria prolifera. 相似文献
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JOAN VALUÈS MONTSERRAT TORRELL NÚRIA GARCIA JACAS 《Botanical journal of the Linnean Society. Linnean Society of London》2001,137(4):399-407
Fifteen chromosome counts of six Artemisia taxa and one species of each of the genera Brachanthemum, Hippolytia, Kaschgaria, Lepidolopsis and Turaniphytum are reported from Kazakhstan. Three of them are new reports, two are not consistent with previous counts and the remainder are confirmations of very scarce (one to four) earlier records. All the populations studied have the same basic chromosome number, x = 9, with ploidy levels ranging from 2x to 6x. Some correlations between ploidy level, morphological characters and distribution are noted. 相似文献
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Curcumin is the yellow pigment of turmeric that interacts irreversibly forming an adduct with thioredoxin reductase (TrxR), an enzyme
responsible for redox control of cell and defence against oxidative stress. Docking at both the active sites of TrxR was performed to compare
the potency of three naturally occurring curcuminoids, namely curcumin, demethoxy curcumin and bis-demethoxy curcumin. Results show
that active sites of TrxR occur at the junction of E and F chains. Volume and area of both cavities is predicted. It has been concluded by
distance mapping of the most active conformations that Se atom of catalytic residue SeCYS498, is at a distance of 3.56 from C13 of
demethoxy curcumin at the E chain active site, whereas C13 carbon atom forms adduct with Se atom of SeCys 498. We report that at least
one methoxy group in curcuminoids is necessary for interation with catalytic residues of thioredoxin. Pharmacophore of both active sites of
the TrxR receptor for curcumin and demethoxy curcumin molecules has been drawn and proposed for design and synthesis of most probable
potent antiproliferative synthetic drugs. 相似文献
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正Dear Editor,In December 2019, a novel human coronavirus caused an epidemic of severe pneumonia(Coronavirus Disease 2019,COVID-19) in Wuhan, Hubei, China(Wu et al. 2020; Zhu et al. 2020). So far, this virus has spread to all areas of China and even to other countries. The epidemic has caused 67,102 confirmed infections with 1526 fatal cases 相似文献