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1.
集约高产过程中土壤有机质动态初探   总被引:2,自引:0,他引:2  
集约高产过程中土壤有机质动态初探崔玉亭,韩纯儒(北京农业大学,100094)DynamicsofSoilOrganicMatter(SOM)intheProcessofAgriculturalIntensification¥.CuiYuting;HanChunru(BeijingAgriculturalUniversity,100094).ChineseJournalofEcology,1993,12(2):37—38.Inthispaper,thebalanceofsoilorganicmatter(SOM)intheprocessofagriculturalintensificationinChangzhouregionisstudiedandamedium-andlong-termpredictionofitsdynamicsismade。There-sultsshowthatduringthisprocess,thebalanceofSOMisgettingbetter,andafteramediumorlongpe-riod(e.g,10—20yeats),theSOMcontentcangett  相似文献   

2.
猕猴属6个种的rDNA变异及其系统进化关系   总被引:4,自引:0,他引:4  
王文  宿兵 《遗传学报》1996,23(5):343-350
以人28S,18S,rDNA为探针,用15种限制性内切酶构建了猕猴属6个种(M.mulatta,M.facsicularisfM.arctoides,M.assamensis.M.thibetana.M。nemestrina)和滇金丝猴Rhinopithecusbieti),白颊长臂猿(Hylobatesleucogenys)核糖体DNA重复单位的限制性内切酶图谱,红面猴(M.arctoies)与  相似文献   

3.
Korb.  SK 《昆虫分类学报》1998,20(1):61-62
本文订正黄人鑫和村山修一(1992)在《蝶と蛾》(43卷1期)上发表的几个蝴蝶新种和新亚种。1.ParnasiusphoebushalasicusHuangetMurayama,1992为Parnasiusphoebusphoebus(Fabr.1793)的新异名。2.ParnasiusariadnejiadengyuensisHuangetMurayama,1992为Driopa(Erythrodiopa)ariadneariadne(Kindermann,1853)的新异名。3.PontiacalidicehalasiaHuangetMurayama,1992为Synchloecalidicecalidice(Hübner)的新异名。4.MelitaeascotosiaweiwueriaHuangetMurayama,1992为MelitaeascotosiabutleriHiggins的新异名。  相似文献   

4.
Liu D  Lu JS  Yin XL 《生理学报》2000,52(6):483-486
观察pp60c-src在血管紧张素Ⅱ(AngⅡ)诱导血管平滑肌细胞(VSMCs)内丝裂原活化蛋白激酶(MAPK)激活中的作用,以了解AngⅡ促VSMCs增殖的信号转导过程。将合成的反义c-src寡脱氧核苷酸(oligodeoxynucle-otides,ODNs)以脂质体包裹转染培养的大鼠VSMCs,用Western印迹测得细胞裂解液中pp60c-src含量明显下降,免疫沉淀方法测得pp60c-s  相似文献   

5.
庐山土壤微生物类群及酶活特性   总被引:3,自引:0,他引:3  
庐山土壤微生物类群及酶活特性陆杨森,熊金莲,张明(安徽农学院,合肥230036)MicrobialGroupsandEnzymeActivityinSoilofLushanMountain¥LuYangsen;XiongJinlian;ZhangMing(AnhuiAgriculturalCollege,Hefei230036).ChineseJournalofEcology1993,12(5):25-28。ThetotalnumberofmicrobesvariesindifferentsoiltypesofLushanMountain,beingthehighest(1.2×10 ̄9numbersgdrysoil)inmountainousyellowbrownsoil.Theecologialdistributionofvariousmicrobialgroupsindifferentsoiltypesissimllar。Bacteriaismorethanactinomycesandfungi.Nonitrifyingbacte-riacanbefoundInsollsofLushanMountai  相似文献   

6.
小麦秸秆的生化他感效应   总被引:14,自引:0,他引:14  
小麦秸秆的生化他感效应马永清,毛仁钊,刘孟雨,刘小京,张玉铭(中国科学院石家庄农业现代化研究所,050021)AllelopathicEffectsofWheatStraw¥MaYongqing;MaoRenzhao;LiuMenyu;LiuXiaojing(ShijiazhuangInstituteofAgriculturalModernization,AcademiaSinica,050021).ChineseJournalofEcology,1993,12(5);36-38。Theworld-wideresearchesonallelopathiceffectsofwheatstrawaresummarizedandthecurrentsitua-tiononisolationandidentificationofallelochemicalsfromitispresented.whichwillgiveaguidanceinourtheoreticalstudyandproductivepractice。Keywords:Allelopathy,allelochemicals,wheatstraw。  相似文献   

7.
Atthe18thInternationalCongressofBiochemistryandMolecularBiology,Birmingham,EnglandTheInternationalUnionofBiochemistryandMolecularBiology(IUBMB),theFederationofEuropeanBiochemicalSocieties(FEBS),andtheBiochemicalSocietyannouncethesponsorshipofaSympos…  相似文献   

8.
本文记述了曼盲蝽属MansonielaPoppius,1915的7个新种:环曼盲蝽M.annulatasp.nov.;脊曼盲蝽M.cristatasp.nov.;狭长曼盲蝽M.elongatasp.nov.;黄翅曼盲蝽M.flavasp.nov.;胡桃曼盲蝽M.juglandissp.nov.;瑰环曼盲蝽M.rosaceasp.nov.;赤环曼盲蝽M.rubidasp.nov.。提出3个新组合:M.cinnamomi(ZhengetLiu,1992),comb.nov.;M.sasafri(ZhengetLiu,1992),comb.nov.;M.wangi(ZhengetLi,1992),comb.nov.,均由PachypeltisSignoret属移入本属,模式标本存放于南开大学生物系昆虫标本室  相似文献   

9.
中国白菜RAPD分子遗传图谱的构建   总被引:17,自引:0,他引:17  
以芜菁(Brassica campestris L.ssp.rapifera Metzg)和结球白菜(B.carnpestris L.ssp .Plkinensis(Lour.)Oisson)杂交的F2群体为试材,采用RAPD标记,用84个10核苷酸随机引物构建了白菜的RAPD遗传图谱。该图谱覆盖基因组的1632.4cM(certi Morgan)标记间的平均间隔为16.5cM。其中最长的连锁群为  相似文献   

10.
在脉冲电泳(pulsed-field gel elctrophoresis,PFGE)研究中,经常使用的分子量标记有啤酒酵母(Saccharomyces cereveslae)和粟酒裂殖酵母(Schizosaccharomyces pombe)的染色体完整DNA。其中,啤酒酵母(如菌株YNN295)有16条染色体,分子量变化范围为0.25Mb~2.2Mb(McCluskeyelal,1990),适于作为小于2.2Mb的染色体DNA的分子量标记;粟酒裂殖酵母(如菌株972h-)有3条染色体,分子量…  相似文献   

11.
害虫区域性生态调控的理论、方法及实践   总被引:13,自引:2,他引:11  
戈峰 《昆虫知识》2001,38(5):337-341
本文在分析害虫生态调控的生态学基础上 ,论述了害虫区域性生态调控的原理与方法 ,并以华北棉田害虫管理实践为例 ,介绍了害虫区域性生态调控的实施过程  相似文献   

12.
我国农业害虫综合防治研究现状与展望   总被引:9,自引:0,他引:9  
害虫综合防治作为农业生产的一项重要策略,在农业可持续发展中具有举足轻重的作用。近年来,针对我国害虫防治所存在的技术需求,科技部等部门先后通过973计划、863计划、科技支撑计划和农业行业专项等对重要害虫防治研究立项支持。通过这些项目的实施,我国建成了一支由国家和省级科研单位和大学组成的专业科研队伍和研究平台,对害虫监测预警技术、基于生物多样性保护利用的生态调控技术、害虫生物防治技术、化学防治技术、抗虫转基因作物利用技术等方面的研究取得了一系列的重要进展,研究建立了棉花、水稻、玉米、小麦和蔬菜等作物重要害虫的综合防治技术体系,并在农业生产中发挥了重要作用。以基因工程和信息技术为代表的第二次农业技术革命的到来,推动了害虫综合防治的理论发展,为害虫综合防治技术的广泛应用提供了新的机遇。地理信息系统、全球定位系统等信息技术和计算机网络技术的应用,提高了对害虫种群监测和预警的能力和水平,转基因抗虫作物的商业化种植等技术的应用显著增强了对害虫种群的区域性调控效率。针对产业结构调整和全球气候变化所带来的害虫新问题,进一步发展IPM新理论与新技术将成为我国农业昆虫学研究的重要方向之一。  相似文献   

13.
试论拓宽生物防治范围,发展虫害可持续治理   总被引:1,自引:0,他引:1  
严毓骅 《昆虫学报》1998,41(-1):1-4
该文针对我国生物防治资源极其丰富和农民经济实力薄弱的特点,结合我国微孢子虫治蝗和苹果园植被多样化持续治理虫害的成果,论述了应如何发展和拓宽具有我国特色的害虫生物防治,进一步提高综合防治水平,促进农业可持续发展。  相似文献   

14.
Worldwide, the theory and practice of agricultural extension system have been dominated for almost half a century by Rogers' "diffusion of innovation theory". In particular, the success of integrated pest management (IPM) extension programs depends on the effectiveness of IPM information diffusion from trained farmers to other farmers, an important assumption which underpins funding from development organizations. Here we developed an innovative approach through an agent-based model (ABM) combining social (diffusion theory) and biological (pest population dynamics) models to study the role of cooperation among small-scale farmers to share IPM information for controlling an invasive pest. The model was implemented with field data, including learning processes and control efficiency, from large scale surveys in the Ecuadorian Andes. Our results predict that although cooperation had short-term costs for individual farmers, it paid in the long run as it decreased pest infestation at the community scale. However, the slow learning process placed restrictions on the knowledge that could be generated within farmer communities over time, giving rise to natural lags in IPM diffusion and applications. We further showed that if individuals learn from others about the benefits of early prevention of new pests, then educational effort may have a sustainable long-run impact. Consistent with models of information diffusion theory, our results demonstrate how an integrated approach combining ecological and social systems would help better predict the success of IPM programs. This approach has potential beyond pest management as it could be applied to any resource management program seeking to spread innovations across populations.  相似文献   

15.
21世纪害虫管理的一些特征展望   总被引:16,自引:0,他引:16  
戈峰  苏建伟 《昆虫知识》2002,39(4):241-246
分析了近年来国内外IPM研究的进展 ,认为未来的害虫管理是以作物的控害作用为中心 ,以农田生态系统或区域性生态系统为对象 ,以大量信息管理为基础 ,以发展新技术 (转基因作物和昆虫性信息素 )和农民参与为重点 ,以生态调控为手段 ,以持续发展为方向。从而使害虫管理提高到一个新的境界  相似文献   

16.
浅谈害虫成虫防治技术   总被引:7,自引:2,他引:5  
目前害虫防治中的一系列问题如害虫幼虫抗药性上升、害虫天敌被大量杀伤、人畜中毒、环境污染与土壤农药残毒日趋严重 ,使以成虫为目标虫态或防治对象而开展的成虫防治策略被广为接受并广泛应用。本文对目前使用的各种成虫防治技术体系进行了概括 ,并列举了成虫防治技术的特点和优点 ,以及进行成虫防治的许多实例。其中信息化合物防治和遗传防治的飞速发展为成虫防治的应用提供了多种途径。  相似文献   

17.
稻飞虱灾变机理及可持续治理的基础研究   总被引:1,自引:0,他引:1  
娄永根  程家安 《昆虫知识》2011,48(2):231-238
稻飞虱(褐飞虱、白背飞虱和褐飞虱)是威胁我国粮食安全最大的生物灾害。本文基于稻飞虱致害能力的高度变异性、对农药的高适应性、传播病毒病和具有远距离迁飞能力等特点,以及研究中存在的稻飞虱迁飞动态、致害性变异和种间互作关系等灾变机理机制不清楚,提出了稻飞虱迁飞时空动态、致害性变异、稻飞虱传播的病毒病、农药对稻飞虱及其天敌的生态毒理效应、稻飞虱基因组数据分析和稻田生态系统对稻飞虱种群数量调控功能6个研究发展方向以阐明稻飞虱灾变的内在机理,为稻飞虱可持续治理体系建设提供理论依据。  相似文献   

18.
Myths, models and mitigation of resistance to pesticides   总被引:3,自引:0,他引:3  
Resistance to pesticides in arthropod pests is a significant economic, ecological and public health problem. Although extensive research has been conducted on diverse aspects of pesticide resistance and we have learned a great deal during the past 50 years, to some degree the discussion about ''resistance management'' has been based on ''myths''. One myth involves the belief that we can manage resistance. I will maintain that we can only attempt to mitigate resistance because resistance is a natural evolutionary response to environmental stresses. As such, resistance will remain an ongoing dilemma in pest management and we can only delay the onset of resistance to pesticides. ''Resistance management'' models and tactics have been much discussed but have been tested and deployed in practical pest management programmes with only limited success. Yet the myth persists that better models will provide a ''solution'' to the problem. The reality is that success in using mitigation models is limited because these models are applied to inappropriate situations in which the critical genetic, ecological, biological or logistic assumptions cannot be met. It is difficult to predict in advance which model is appropriate to a particular situation; if the model assumptions cannot be met, applying the model sometimes can increase the rate of resistance development rather than slow it down. Are there any solutions? I believe we already have one. Unfortunately, it is not a simple or easy one to deploy. It involves employing effective agronomic practices to develop and maintain a healthy crop, monitoring pest densities, evaluating economic injury levels so that pesticides are applied only when necessary, deploying and conserving biological control agents, using host-plant resistance, cultural controls of the pest, biorational pest controls, and genetic control methods. As a part of a truly multi-tactic strategy, it is crucial to evaluate the effect of pesticides on natural enemies in order to preserve them in the cropping system. Sometimes, pesticide-resistant natural enemies are effective components of this resistance mitigation programme. Another name for this resistance mitigation model is integrated pest management (IPM). This complex model was outlined in some detail nearly 40 years ago by V. M. Stern and colleagues. To deploy the IPM resistance mitigation model, we must admit that pest management and resistance mitigation programmes are not sustainable if based on a single-tactic strategy. Delaying resistance, whether to traditional pesticides or to transgenic plants containing toxin genes from Bacillus thuringiensis, will require that we develop multi-tactic pest management programmes that incorporate all appropriate pest management approaches. Because pesticides are limited resources, and their loss can result in significant social and economic costs, they should be reserved for situations where they are truly needed--as tools to subdue an unexpected pest population outbreak. Effective multi-tactic IPM programmes delay resistance (= mitigation) because the number and rates of pesticide applications will be reduced.  相似文献   

19.
作者是澳大利亚著名昆虫学家,长期在东南亚农村工作,积累了宝贵经验。他在文中提出,害虫综合防治(IPM)的含义是综合害虫治理的方法以达到农业上的最大收益和持续发展,同时注意对环境有良好的影响。对小农户应提供确实可行的整套害虫治理方法,并开创他们能自行选择的机会;他们经过田间学校培训后可成为农作物管理专家,并对怎样防治害虫能作出有根据的抉择。与IPM有关的生物防治最近的发展包括:对害虫的准确鉴定、经生物工程处理和未处理过的生物杀虫药的应用、对转基因动植物的利用、及情报资料的收集。文章讨论了这些生物技术在东南亚地区水稻和蔬菜综合治理中的应用,以8及巴西大豆害虫和越南稻瘟病的治理,阐明通过农户、技术员和研究人员通力合作所获得的成绩对农业持续的发展起了主要的推动作用。  相似文献   

20.
Abstract This paper deals with the relevance of biotechnology and IPM to small scale farmers in South and Southeast Asia. IPM may be defined as the combination and integration of approaches to pest management. which maximizes real profitability and genuine sustainability for the users and farming system and gives due regard to the environment. Alternative and practical pest management options should be developed for small scale farmers who could become experts in crop management and capable of making informed decisions through training in field schools. The latest development of biotechnology includes diagnostics, biological pesticides (either genetically manipulated or not genetically manipulated), transgenic plants and animals (vertebrates and invertebrates) and informatics. The place of biotechnology in rice IPM and vegetable IPM in South and Southeast Asia is discussed. Examples of soybean caterpillar in Brazil and rice blast in Vietnam illustrate the benefits of a strong working partnership between farmers, trainers and researchers in creating new knowledge which promotes sustainable agriculture.  相似文献   

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