共查询到20条相似文献，搜索用时 250 毫秒
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This study explored the medium for new variety of Asparagus——Linlu No.1 to induce germination, bud proliferation,and induce rootings and their formula. The result revealed that MS+6-BA 1.0 mg/L+NAA 0.05 mg/L is the suitable medium for germination; MS+6-BA 0.5 mg/L+NAA 0.5 mg/L is the medium fit for bud proliferation and 1/2MS+IBA 0.5 mg/L+KT 0.05 mg/L+sucrose 30 g/L is the perfect medium for rootings. 相似文献
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CHEN Gong-you 《农业科学学报》2020,19(4):887-888
正Bleeding canker (BC) of pear trees,is a devastating disease in China.The disease was originally observed in Jiangsu Province and its causal agent was identified first as Erwinia sp.in the early 1970's and latter as a novel species,Dickeya fangzhongdai.BC is epidemically emerging prevalently from April to September annually in pear-growing regions in Zhejiang,Anhui and Shandong provinces,and threatening pear industry currently in China.To better control BC disease,it is crucial to know BC symptomatology,epidemics,etiology,and diagnostics first.The special topic of the three papers have well illustrated the points mentioned above.The first article by Chen et al.(2020b) described in detail the symptomatology,etiology and epidemiology of BC disease.BC mainly damages pear trunks and branches with no obvious symptoms early and bacterial rusty oozes mixed with tree saps exuded from died tissues later.The diseased portions display small soft and sap-filled brown spots or red streaks with strong smells likely of yeast fermentation.Importantly in this paper,the causal agent is identified as 相似文献
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Biological protection of plants in agricultular landscape——state of the art,problems and ways of their decision 
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下载免费PDF全文 Sokolov M S Kolombet L V 《浙江大学学报(农业与生命科学版)》2004,30(4):398-400
1. Biological protection of plants: definition and objectives. Technologically, biological protection of plants (hereinafter bioprotection) is a high agricultural technology involving agricultural landscape approach and basee on an ecological imperative, namely “use living beings against living beings“. In 相似文献
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Tumor of the broad ligament,not including retention cysts,is re-latively uncommon.So far as weknow there have been about 14 casesof adenocarcinoma reported in theliterature.Because it has not beenreported in China,we report here 相似文献
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Increasing Subsidies to Main Grain Production Area——Necessity of the Rejuvenation of Northeast China
WEIHeng LIYou-hua CONGDan-yang 《东北农业大学学报(英文版)》2004,11(2):187-190
As an old industrial base, Northeast China is one of the most important grain production base. To rejuvenate Northeast China, it is necessary to strengthen farming products processing, lengthen industrial chain and develop sustainable agriculture. 相似文献
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Dichloroacetamides have been selectively synthesized with dichloroacetylehloride and amine.A new method for analysing(TLC) was proposed ,the conditions of reaction was detected ,The effects of structure,temperature and reaction time have been investigated.The reaction gave higher yield (90.5%) and shorter-time (4h.).Rf value of products was first determined. 相似文献
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《东北农业大学学报(英文版)》2015,(4)
Developing production and operation in scales in the major grain producing areas is the direction of the paper. Seizing the opportunity of modern agriculture comprehensive reform in two plains(Songnen Plain and Sanjiang Plain) of Heilongjiang Province and supporting to build a new type of production and management based on the big grain production householding, which plays demonstration and leading roles, have an important strategic position in improving agricultural comprehensive production capacity and ensuring national food security. In this paper, based on the survey data about the big grain production households production operations and analyses of the obstacles in expansion of production in Heilongjiang Province, specific suggestions in supporting the development of the big grain production household were put forward, such as, increasing agricultural production socialized level; perfecting the service system of land transferring; improving financial policies and farmer-friendly policy measures and perfecting the agriculture socialized service system. 相似文献
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FU Cun-jun 《安徽农业科学》2012,40(16)
为促进伊春域市转型进一步的发展,对伊春城市转型进程进行阶段性可持续发展评价.综合前人的研究成果构建城市可持续发展评价指标体系,收集伊春城市转型相关数据,分析伊春城市转型中经济子系统、社会子系统、资源子系统及环境子系统发展轨迹,在此基础上对伊春城市转型进行可持续发展综合评价.研究表明,伊春城市转型有效推进了城市综合系统的发展,但要实现可持续发展的长远目标,还需要采取加强可持续发展价值观建设、加大教育和科技投入、强化国有林权制度改革等措施. 相似文献
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BAIXiu-juan MAJian-zhang 《东北农业大学学报(英文版)》2003,10(1):55-59
Bird migration is a seasonal movement between breeding and wintering grounds. Opinions are widely divided on the reasons for this movement. According to biological data including: geographic distribution, reproductive physiology,comparison of breeding and wintering habitats ,geological data including Qinghai-Tibetan Plateau uplift and Quatemary Period glaciation ,it is inferred that bird migration is a survival mechanism,and that migration originated on the breeding grounds. 相似文献
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采用档案分析法和调查法,论述了农村＂三权＂抵押与农户融资的关系,对农村＂三权＂抵押融资的行为选择进行了分析,表明农户融资需求强烈,但需求满足程度不高;农户融资非正规渠道较多,无抵押物被拒绝贷款较为普遍;农业现代化、产业化、规模化经营对资金需求强烈。提出了开展＂三权＂抵押贷款亟需解决的主要问题及对策建议：尽快解决抵押登记问题,是开办＂三权＂抵押贷款的前提;建立顺畅的评估机制,是推动＂三权＂抵押贷款的重要条件;尽快解决农房确权难题,是拓展农房抵押贷款的必备要素;有效解决处置变现问题,是做大＂三权＂抵押融资的关键;建立完善的林业要素市场,是促进林权抵押贷款健康发展的主要环节;出台农村产权融资风险补偿基金管理办法和合理采取税收减免措施,是加快＂三权＂抵押贷款发放的主要途径。 相似文献
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采用陕西省827户从事种养殖业农户的实地调查数据,将二元Logistic和ISM模型结合,对农户生物资产抵押融资意愿影响因素及其层次性进行了研究。结果表明:农户年龄、家庭劳动力数量、贷款经历、耕地面积、生物资产价值、抵押品销售、政策认知、抵押率合适程度、抵押融资意义认知9个因素对农户生物资产抵押融资意愿影响显著并具有层次性,其中家庭耕地面积是最基础根源的影响因素,年龄、劳动力数量及生物资产价值是次基础影响因素,贷款经历、抵押品销售以及抵押率合适程度是中层影响因素,政策认知及抵押融资意义认知是表层直接影响因素。 相似文献
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为了解农地经营权抵押融资对农户资金需求的满足情况,利用宁夏同心县、平罗县两地农户调查数据,通过双变量Probit模型对农户农地经营权抵押融资可得性及其影响因素进行了实证研究。结果表明:1)市场主导型农地经营权抵押融资模式下,农户和农村金融机构参与业务积极性较强,贷款可得性较高;2)农户农地经营权抵押融资业务可得性与年龄增长呈现倒"U"型曲线特征;3)供养比、现金/储蓄、生产支出越高的农户参与贷款可得性越低;家庭土地价值、农业收入、非金融资产总值越高、交通越便利,农户贷款可得性越高。因此,为提高农户农地经营权抵押融资可得性,应考虑当地金融与信用环境,优先采用市场主导型模式;合理设计农地经营权抵押贷款评估方案;提供差异化金融服务,满足农户多层次的贷款需求。 相似文献
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小额林权抵押贷款的研究对有效解决林农资金缺口、提高林农收入、发展林业产业、制订科学的林业公共政策具有重要现实意义。基于福建省和浙江省410户农户的调查问卷,以农户和政策性战略为视角,应用SWOT分析法,对林农小额林权抵押贷款的外部机会与威胁、内部优势与劣势系统予以分析。结果表明,该贷款业务处于有利的政策和经济环境;而贷款涉及机构多、手续复杂,金融机构贷款供给不足,贷款融资方式单一且期限短、利率高,抵押物保险险种单一,保费高且索赔困难,以及抵押物处置困难等内部不利条件,限制了该贷款的发展。由此,林农小额林权抵押贷款处于WO组合,应采用先稳定后发展的战略,最后提出具体制度性建议。 相似文献
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基于陕西及宁夏部分地区农户关于产权抵押贷款的有关调研数据,以所在地区、年龄、家庭年收入等6个因素作为自变量,以农户产权抵押贷款需求为因变量,利用R语言构建决策树的农户产权抵押贷款信用评估模型,为相关农村金融机构提供金融政策方面的支持。研究结果表明:对于具有不同特征的农户,其贷款意愿呈现出一定的差异性。最终,除耕地面积变量外其余5个变量被引入决策树模型进行分析。通过检验和改进后的模型具有一定的分类正确性及准确性,对于农村金融机构在制定相应的金融政策及实际贷款风险控制过程中能起到一定的参考作用。 相似文献
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基于我国9省小农户调查数据,运用双稳健的平均处理效应模型,研究了农地确权对小农户信贷可得性的影响及其作用机理。结果表明:农地确权可以提升小农户信贷可得性。进一步研究发现,需求方面的影响路径是:确权提高了小农户的土地安全性,增加了农业长期投资,并提高了信贷意愿。供给方面的影响路径是:确权增加了小农户的财产权并使其拥有了可流转大额财产,传递了还款可能性增加的信号;而且可将农地作为抵押品获得农地抵押贷款,增加了金融机构的贷款供给。不过,农地的信号传递作用大于抵押作用,农地抵押作用的发挥需要进行进一步的制度和组织创新。 相似文献
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着眼于江苏省南京市试点区(高淳区)与非试点区,从家庭农场基本情况、家庭农场主贷款意愿及其影响因素3方面进行,通过问卷调查、访谈、实地考察等方式,结合Logistic模型分析进行实证检验,探讨家庭农场对农地经营权抵押贷款的意愿需求及其影响因素。结果表明,受教育程度、家庭农场的年毛收入水平、家庭农场的耕地面积、贷款利率、贷款期限以及其他贷款满足程度对于家庭农场农地经营权抵押贷款的意愿需求有着显著的影响。提出了相应的政策建议:政府要加大对农地经营权抵押贷款政策的宣传和普及力度,银行、农村合作社等金融机构要结合现阶段家庭农场的实际需求调整农地经营权贷款的利率和期限,同时要增加家庭农场主教育年限以及鼓励更多知识分子进入家庭农场的经营管理。 相似文献
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运用问卷调查、入户访谈、统计分析等方法,研究了农村土地抵押贷款发展情况.阐明了农村土地抵押贷款发展的特点:农地抵押需求大,渠道不畅暗流大,先行先试成效大;揭示了农村土地抵押贷款发展面临的挑战:制度创新突破难,农民权益保障难,农地市场发展难;提出废止农村土地抵押贷款禁令,完善农村土地产权制度,建立城乡统一的土地市场,推进农村土地抵押贷款顺利发展. 相似文献