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1.
随着消费者对农产品质量安全的要求不断提高,快速响应、高效控制、安全保障成为现代农产品安全领域的重要课题。由于传统溯源系统存在原始信息少、信息不透明和可靠性差等问题,消费者对农产品溯源技术并不信任。且各组织之间互不信任,信息断层现象时常发生,出现问题后职责追溯困难,安全管控的效果难以满足社会需求。区块链技术的可追溯性、不可篡改和去中心化等特点,可以很好的解决传统溯源系统的缺陷。区块链作为一项新兴技术,在农产品溯源方面具有巨大的潜力。然而,基于区块链技术的农产品溯源系统的优势、挑战和亟需解决的问题,还没有得到充分探讨。本研究以大米溯源系统为例,提出了基于区块链技术的农产品溯源系统的框架设计。详细介绍了如何通过物联网技术获取大米的供应链数据信息。最后,分析了基于区块链技术的农产品溯源方法的优势和挑战。本研究为研究人员和从业人员提供了基于区块链技术的农产品溯源系统的宝贵信息,并对改善农产品可持续性产生了积极的影响。 相似文献
2.
卿硕 《农产品加工．学刊》2014,(7):71-73,76
制约我国绿色农产品市场发展的一个重要问题是如何培育顾客的品牌信任,而塑造品牌体验是培育顾客信任的重要手段,其中零售终端是塑造绿色农产品品牌体验的前沿阵地。首先介绍绿色农产品与品牌信任以及品牌体验,接着从品牌信任和品牌体验角度分析绿色农产品消费者,最后指出绿色农产品零售终端塑造品牌体验的步骤和策略。 相似文献
3.
在营销过程中,通过各种各样的资源向消费者传递企业及产品的各项信息,来帮助和促进消费者熟悉企业及产品,并促使消费者对企业及产品产生好感与信任,继而促使其踊跃购买消费产品服务等,这些资源统称为促销品(促销工具).促销品是个平台,通过这个平台让消费者产生兴趣并取得信任进而消费,所以由刺激和强化市场需求的花样繁多的各种促销品组成了促销. 相似文献
4.
不同保鲜模式对生鲜农产品供应链系统利润的影响分析 总被引：2，自引：0，他引：2
针对消费者对生鲜农产品保鲜要求高但企业保鲜意识不足的问题,研究了不同保鲜模式对生鲜农产品供应链系统利润的影响。采用迭代关系表示生鲜农产品新鲜度,依据成员是否保鲜将保鲜模式分为8类,构建不同保鲜模式下的生鲜农产品供应链系统利润模型,并求解不同保鲜模式下生鲜农产品供应链系统的最优决策参数和利润,分析影响供应链系统利润的因素,最后通过数值算例验证模型结论。研究表明,供应链系统三者(生产商、分销商、零售商)均保鲜时利润最大,降低成本或者降低运输时间均可使供应链系统的订货量和利润上升。 相似文献
5.
在营销过程中通过各种各样的资源,向消费者传递企业及产品的各项信息,来帮助和促进消费者熟悉企业及产品,并促使消费者对企业及产品产生好感与信任,继而促使其踊跃购买消费产品服务等,以上的各种资源统称为促销品（促销工具）。促销品是个平台,通过这个平台让消费者产生兴趣并取得信任进而消费,所以由刺激和强化市场需求的花样繁多的各种促销品组成了促销。因此,要想让促销活动更为成功有效,首先在节约成本的前提下,将每一种促销品的功能发挥到最大化。 相似文献
6.
基于国产基础软件的农产品 总被引：1，自引：1，他引：0
为建立农产品安全溯源机制,促进国产基础软件在农产品质量安全监管领域的应用,分析果蔬、畜禽等农产品的流通特点,设计农产品质量安全管理和溯源查询业务构件库,将农产品溯源编码与生产流通环节的关键信息有机结合,基于国产基础软件提供的支撑运行环境,搭建农产品质量安全溯源管理系统,为政府、企业和消费者建立基于国产基础软件的农产品质量安全信息交互和综合管理平台,通过示范应用,有效可靠地实现了对农产品流通全程质量监管和信息溯源,提升了农产品质量安全管理水平。 相似文献
7.
针对不良经济活动导致特色农产品品牌严重受损、传统农产品质量追溯技术数据易被篡改等问题，研究设计基于区块链的质量供应链技术，有效发挥追溯技术在保障特色农产品质量供应链中的作用。本研究以“门头沟京白梨”为例，系统阐述北京市门头沟区‘京白梨’产业现状及特色农产品质量供应链存在的问题，分析区块链应用于特色农产品追溯的技术可行性。基于区块链技术分布式存储、去中心化和不可篡改性等特点，设计了“门头沟京白梨”质量安全可追溯体系的总体构架，基于区块链的技术架构，阐述了在种植、仓储、流通、消费和监管等环节质量信息全程记录和追溯管理的实现途径，以期为构建基于区块链的特色农产品质量安全追溯技术与实践提供支持。建立的特色农产品质量供应链体系，将会使特色农产品品牌和质量得到更加有效的保护、监督和管理。 相似文献
8.
9.
为了分析各因素对生鲜农产品物流库存的影响,运用系统动力学方法,建立生鲜农产品物流库存系统流程图,并利用Vensim软件进行模拟仿真,最终得出:订货提前期延长、缺货率增大,会增加企业成本,消费需求减少,企业库存将大幅降低。因此,企业应准确掌握市场消费需求,确定合适的订货提前期及缺货率以控制成本。同时,供应链上、下游节点企业间需要加强合作,促进信息共享,以提高供应链整体绩效。 相似文献
10.
11.
Biological Activity and Quantification of Suspected Allelochemicals from Alfalfa Plant Parts 总被引：7，自引：0，他引：7
Autotoxicity restricts reseeding of alfalfa (Medicago sativa L.) after alfalfa until autotoxic chemical(s) breaks down or is dispersed into external environments. A series of aqueous extracts from leaves, stems, roots and seeds of alfalfa ‘Vernal’ were bioassayed against alfalfa seedlings of the same cultivar to determine their autotoxicity. The highest inhibition was found in the extracts from the leaves. Extracts at 40 g dry tissue l?1 from alfalfa leaves were 15.4, 17.5 and 28.7 times more toxic to alfalfa root growth than were those from roots, stems and seeds, respectively. A high‐performance liquid chromatography (HPLC) analysis with nine standard compounds showed that the concentrations and compositions of allelopathic compounds depended on the plant parts. In leaf extracts that showed the most inhibitory effect on root growth, the highest amounts of allelochemicals were detected. Among nine phenolic compounds assayed for their phytotoxicity on root growth of alfalfa, coumarin, trans‐cinnamic acid and o‐coumaric acid at 10?3 m were most inhibitory. The type and amount of causative allelochemicals found in alfalfa plant parts were highly correlated with the results of the bioassay, indicating that the autotoxic effects of alfalfa plant parts significantly differed. 相似文献
12.
C. J. Spurr D. A. Fulton P. H. Brown R. J. Clark 《Journal of Agronomy and Crop Science》2002,188(4):275-280
Development of onion (Allium cepa L., cv. ‘Early Cream Gold’) seed under cool climate conditions in Tasmania, Australia occurred over a longer duration than previously reported, but similar patterns of change in yield components were recorded. In contrast to previous studies, umbel moisture content declined from 85 to 67 % over 57 days while seed moisture content decreased from 85 to 31 %. Seed yield continued to increase over the duration of crop development, with increasing seed weight compensating for seed loss resulting from capsule dehiscence in the later stages of maturation. Germination percentage was high and did not vary significantly from 53 to 77 days after full bloom (DAF), but mean germination time declined and uniformity of germination increased significantly over the same time period. The percentage abnormal seedlings declined with later harvest date, resulting in highest seed quality at 77 DAF. The results of this study suggest that the decision to harvest cool climate onion seed crops before capsule dehiscence will result in a loss of potential seed yield and quality. 相似文献
13.
Jens Jensen 《Euphytica》1979,28(1):47-56
Summary The high-lysine gene in Risø mutant 1508 conditions an increased lysine content in the endosperm via a changed protein composition, a decreased seed size, and several other characters of the seed. The designation lys3a, lys3b, and lys3c, is proposed for the allelic high-lysine genes in three Risø mutants, nos 1508, 18, and 19. Linkage studies with translocations locate the lys3 locus in the centromere region of chromosome 7. A linkage study involving the loci lys3 and ddt (resistance to DDT) together with the marker loci fs (fragile stem), s (short rachilla hairs), and r (smooth awn) show that the order of the five loci on chromosome 7 from the long to the short chromosome arm is r, s, fs, lys3, ddt. The distance from locus r to locus ddt is about 100 centimorgans. 相似文献
14.
Hongyan WEI Jian ZHOU Jinguang LU Jingzheng SONG Qiongxi YU Zhihong JIANG 《Medicinal Plant》2019,(6):27-29
[Objectives]This study aimed to establish a QAMS(quantitative analysis of multi-components by single-marker)method for simultaneous determination of four phenol... 相似文献
15.
Chunli TANG Fengxian ZHAO Hongxia CHEN Jiabao MA Jiangcun WEI Meiyan QIU Zhen XIE 《Medicinal Plant》2019,(6):60-65
[Objectives]To optimize the water extraction process of Chinese Herbal Compound Man Gan Ning and establish a method for its extraction and content determination... 相似文献
16.
D. A. Bond G. J. Jellis G. G. Rowland J. Le Guen L. D. Robertson S. A. Khalil L. Li-Juan 《Euphytica》1993,73(1-2):151-166
Progress is being made, mainly by ICARDA but also elsewhere, in breeding for resistance to Botrytis, AScochyta, Uromyces, and Orobanche; and some lines have resistance to more than one pathogen. The strategy is to extend multiple resistance but also to seek new and durable forms of resistance. Internationally coordinated programs are needed to maintain the momentum of this work.Tolerance of abiotic stresses leads to types suited to dry or cold environments rather than broad adaptability, but in this cross-pollinated species, the more hybrid vigor expressed by a cultivar, the more it is likely to tolerate various stresses. 相似文献
17.
Summary Apple and pear pollen was irradiated with doses of 0, 50, 100, 250 and 500 krad (gamma rays) and stored at 4°C and 0–10% r.h. From the in-vitro germination percentages an average LD 50 dose of about 220 krad was estimated. For both irradiated and untreated pollen a close and corresponding lineair relationship existed between germination percentage and pollen tube growth.Irradiated pollen was much more sensitive to dry storage conditions than untreated pollen, resulting in less germination and more bursting. Apparently, irradiation caused the pollen cell membrane to lose its flexibility faster than normal. Rehydration of dry-stored, irradiated pollen in water-saturated air restored germination percentages up to their initial levels. The importance of this procedure in germination trials is stressed. 相似文献
18.
[Objectives] To determine the optimum extraction technology for total phenols of leaves in Acanthopanax giraldii Harms.[Methods]The single factor test and ortho... 相似文献
19.
E. Keep 《Euphytica》1986,35(3):843-855
Summary Cytoplasmic male sterility (cms) is described in the F1 hybrids Ribes × carrierei (R. glutinosum albidum × R. nigrum) and R. sanguineum × R. nigrum. In backcrosses to R. nigrum, progenies with R. glutinosum cytoplasm were either all male sterile, or segregated for full male fertility (F) and complete (S) and partial (I) male sterility. Ratios of F:I+S suggested that two linked genes controlled cms, F plants being dominant for one (Rf
1) and recessive for the other (Rf
2).Segregation for cms in relation to three linded genes, Ce (resistance to the gall mite, Cecidophyopsis ribes), Sph
3(resistance to American gooseberry mildew, Sphaerotheca mors-uvae) and Lf
1(one of two dominant additive genes controlling early season leafing out) indicated that Rf
1and Rf
2were in this linkage group. The gene order and approximate crossover values appeared to be: % MathType!MTEF!2!1!+-% feaafiart1ev1aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn% hiov2DGi1BTfMBaeXafv3ySLgzGmvETj2BSbqef0uAJj3BZ9Mz0bYu% H52CGmvzYLMzaerbd9wDYLwzYbItLDharqqr1ngBPrgifHhDYfgasa% acOqpw0xe9v8qqaqFD0xXdHaVhbbf9v8qqaqFr0xc9pk0xbba9q8Wq% Ffea0-yr0RYxir-Jbba9q8aq0-yq-He9q8qqQ8frFve9Fve9Ff0dme% aabaqaciGacaGaamqadaabaeaafaaakeaacaWGdbGaamyzamaamaaa% baGaaiiiaiaacccacaGGWaGaaiOlaiaacgdacaGG0aGaaiiiaiaacc% caaaGaaiiiaiaacccacaGGGaGaamOuaiaadAgaliaaigdakmaamaaa% baGaaiiiaiaacccacaGGGaGaaiiiaiaaccdacaGGUaGaaiOmaiaacs% dacaGGGaGaaiiiaiaacccacaGGGaGaaiiiaaaacaWGsbGaamOzaSGa% aGOmaOWaaWaaaeaacaGGGaGaaiiiaiaacccacaGGGaGaaiiiaiaacc% cacaGGGaGaaiiiaiaacccaaaGaamitaiaadAgaliaaigdakmaamaaa% baGaaiiiaiaacccacaGGGaGaaiiiaiaacccacaGGGaGaaiiiaiaacc% cacaGGGaGaaiiiaiaacccacaGGGaaaaiaadofacaWGWbGaamiAaSGa% aG4maaaa!6E4D!\[Ce\underline { 0.14 } Rf1\underline { 0.24 } Rf2\underline { } Lf1\underline { } Sph3\]. Crossover values of 0.36 for Ce-Lf
1, and 0.15 for Lf
1-Sph
3were estimated from the relative mean differences in season of leafing out between seedlings dominant and recessive for Ce and Sph
3.It is suggested that competitive disadvantage of lf
1-carrying gametes and/or zygotes at low temperatures may be implicated in the almost invariable deficit of plants dominant for the closely linked mildew resistance allele Sph
3. Poor performance of lf
1- (and possibly lf
2-) carrying gametes and young zygotes during periods of low temperature at flowering might also account for the liability of some late season cultivars and selections to premature fruit drop (running off). 相似文献
20.
Parasitic angiosperms cause great losses in many important crops under different climatic conditions and soil types. The most widespread and important parasitic angiosperms belong to the genera Orobanche, Striga, and Cuscuta. The most important economical hosts belong to the Poaceae, Asteraceae, Solanaceae, Cucurbitaceae, and Fabaceae. Although some resistant cultivars have been identified in several crops, great gaps exist in our knowledge of the parasites and the genetic basis of the resistance, as well as the availability of in vitro screening techniques. Screening techniques are based on reactions of the host root or foliage. In vitro or greenhouse screening methods based on the reaction of root and/or foliar tissues are usually superior to field screenings and can be used with many species. To utilize them in plant breeding, it is necessary to demonstrate a strong correlation between in vitro and field data. The correlation should be calculated for every environment in which selection is practiced. Using biochemical analysis as a screening technique has had limited success. The reason seems to be the complex host-parasite interactions which lead to germination, rhizotropism, infection, and growth of the parasite. Germination results from chemicals produced by the host. Resistance is only available in a small group of crops. Resistance has been found in cultivated, primitive and wild forms, depending on the specific host-parasite system. An additional problem is the existence of pathotypes in the parasites. Inheritance of host resistance is usually polygenic and its transfer is slow and tedious. Molecular techniques have yet to be used to locate resistance to parasitic angiosperms. While intensifying the search for genes that control resistance to specific parasitic angiosperms, the best strategy to screen for resistance is to improve the already existing in vitro or greenhouse screening techniques. 相似文献