共查询到20条相似文献，搜索用时 62 毫秒
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建立适应种业市场机制的现代种业科技创新体系成为中国种业健康发展的核心问题。对2003年以来通过国家审定的水稻品种的分析结果表明:中国水稻种业科技创新能力经历改革的刺激之后,整体发展速度放缓。从种业创新体系来看,在育种方法上国有单位是采用常规育种的主导力量,进而成为北方稻区和华东一季稻区的创新主体,私营机构主要集中在南方稻区,国有单位的整体实力较强,种子企业主体地位欠缺,种业科技协作创新开展程度较低。从加快推进我国现代农作物发展角度考虑,我国水稻种业科技创新体系的建设重点应放在强化常规育种的公益性地位,强化育种基础理论建设和发展,强化企业育种创新能力的持续发展,强化育种科技创新的集团协作机制。 相似文献
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中国杂交水稻种业的发展和展望 总被引：1，自引：0，他引：1
杂交水稻是伟大的发明,是中国对世界的重大贡献。杂交水稻的发展促进了中国种业的发展。中国杂交水稻种业经过多年的发展,种业主体多元化格局已基本形成,竞争日趋激烈,骨干种业实力不断增强,种子市场空前繁荣。但杂交水稻种业的发展仍然存在缺乏新品种突破性和市场管理能力不强等诸多实际问题。整合组建"育繁推一体化"的种业巨头,积极稳妥地推进商业化育种进程,把握水稻功能基因专利,突破现代机械化制种技术,以杂交水稻优势抢占国际水稻种业市场高地,将是杂交水稻种业未来的发展方向。 相似文献
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浅议杂交水稻制种技术的创新与发展 总被引：1，自引：0，他引：1
《种子科技》2019,(3)
杂交水稻种子需要年年制种生产,以确保子一代的杂种优势。当前,我国已建立了成熟的种子生产技术体系,但是基于劳力密集型的种子生产技术操作程序繁杂、劳动强度大,滞后于现代农业,迫切需要创新制种技术。应发展新型轻简的全程机械化制种技术,以及父母本混播混种和杂种优势固定(第三代杂交水稻和一系法杂交稻)的种子生产技术,以助推杂交水稻种业的发展。 相似文献
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介绍了当前种业技术正在发生的革命性变化以及由种业技术变革带动的行业变革,在此背景下,深入分析湖北水稻种业目前的状况和发展趋势,结合湖北水稻种植结构的变化,提出湖北水稻种业发展的契机在于发展五特水稻,即:高档优质稻、虾稻、再生稻、节水抗旱稻、全程机械化直播稻,并进行详细介绍,为湖北种业发展提出指导性意见。 相似文献
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我国玉米种业现状与发展战略 总被引：1，自引：1，他引：1
种子产业技术进步涉及知识创新、种质创新、技术创新和产品创新领域，还包括少量制度创新。不同性质的机构在这个产业技术链条中的位置决定了在改革中的走向。目前．种质创新、技术创新和产品创新是玉米种业技术发展的焦点问题。跨国公司进入我国市场，暴露出我国种子产业创新能力薄弱，关键就在于种质创新缺位，技术创新能力薄弱。企业的产品创新能力则爱制于落后的育种思路。因而降低了投资效率。玉米商业育种的实践基础是简化、统一的杂种优势模式。施行走出去发展战略将激化产业内部矛盾，促进种业内部科技体制和管理体制改革，提高产业竞争能力。 相似文献
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<正>杂交水稻种子是我国一项具有高科技含量的农产品,既能对农产品出口创汇起着积极的作用,又能引领种业实施"走出去"战略,更好地利用国内外资源和市场,进一步扩大农业对外开放具有十分重要的意义。本文分析我国杂交水稻种业实施"走出去"战略的现状及存在的问题,进行一些思考,并提出相应对策与建议。1我国杂交水稻种出口贸易面临的新情况、新问题 相似文献
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介绍了运用冷冻干燥技术进行速溶蛋花汤的加工,研究了生产工艺、特点以及影响产品质量的主要因素。试验表明,采用冷冻干燥技术加工的速溶蛋花汤,具有营养丰富、风味独特、方便快捷等特点。 相似文献
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DENG Zhao-jing 《保鲜与加工》2005,(1):153-156
A new definition of inertia,i.e. the momentum is the measuring of inertia of matter, is proposed. The article through and etc., subjects, the correctness of the new notion of inertia:The monentum is the measuring of inertia has been demonstrated, and the unsolved contradictions of the traditional definition of inetia. And the mass is the measuring of inertia has been revealed. 相似文献
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香蕉是热带亚热带发展中国家重要的粮食作物和碳水化合物来源。但近年来,香蕉生产受到严重的病虫危害。大多数香蕉栽培品种是三倍体,生长周期长,而且不孕。由于没有种子,给繁殖和育种带来一定的困难。遗传转化技术的发展为香蕉品种的改良提供了一种有效的手段。香蕉的遗传转化方法有电激法、基因枪法、农杆菌介导法等。农杆菌介导法的应用是香蕉品种改良的一个重大突破。香蕉遗传转化的外植体也发展到多种,有原生质体,胚性细胞悬浮系,分生组织,以及横切薄片等。近几年,随着分子生物学的发展,出现了转化效率更高,重复性更好的香蕉遗传转化技术。如农杆菌和基因枪结合法,离心辅助农杆菌介导法、真空渗透技术等。这些新技术新方法的出现,必将推动香蕉产业高速发展。 相似文献
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Automobile comfort dynamic simulation is necessary when we predict and evaluate the comfort of a automobile or optimize performance of automobile. The nine DOF vibration model of automobile is established , which acts root mean square value of body in multiple work conditions as comfort evaluation indices. Based on the comfort simulation, the Hongyan 1160 is predicted in the way of comfort. The programmes can be used in many different automobiles . The computational result indicates that the model can simulate vibration of automobile truly. It is significant to research automobile comfort evaluation to optimize performance of automobile and comfort simulation .The computational program can be applied to optimize or simulate which has some reference value. 相似文献
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Efficiency of water use of early plantings of sunflower 总被引：4，自引：0，他引：4
M. Auxiliadora Soriano Francisco Orgaz Francisco J. Villalobos Elías Fereres 《European Journal of Agronomy》2004,21(4):465-476
Rain fed crop production in Mediterranean environments depends to a large extent on strategies that avoid the intense summer drought. Early plantings of sunflower have given consistently higher yields in such environments, but the basis for such yield increases has not been explored. We conducted two field experiments at Cordoba (Spain) to investigate the effects of an early and a late planting date on the components of water-limited crop productivity; namely, water use (T), water use efficiency (TE) and harvest index (HI) of sunflower. The results were generalized by simulating rain fed sunflower yields, under early (1 January) and late (15 March) plantings, for a 25-year period with the aid of a simulation model of the Ceres type (OILCROP-SUN) which has been validated in Cordoba. Experimental seed yields of early plantings in 1989 and 1996 were 2.0 and 3.0 t ha−1, while late plantings yields were 1.3 and 2.4 t ha−1, for the 2 years. Average simulated yields were 2.7 ± 1.1 and 1.9 ± 0.7 t ha−1 for early and late plantings, respectively. For the 2 years, T of early plantings was higher than that of late plantings, but the response of TE and HI to planting date was not the same in the two experiments. In the simulation exercise, T and TE of early plantings were consistently higher than those of late plantings, while there were no differences in the HI for the two planting dates. We conclude that early plantings of sunflower increase rain fed yields by increasing both T and TE, while the impact of planting date on HI very much depends on the crop water stress pattern, which is quite variable from year to year even in the predictable Mediterranean environment. 相似文献
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The cotyledon and hypocotyl of eight varieties of alfalfa( Medicago sativa L. )are used to study the effect of different cultivation procedures and genotypes on embryogenic callus and embryoid induction,plant development and transplant of alfalfa.The varieties of alfalfa with high embryoid induction rate and high differentiation rate are screened. A high frequency regeneration system for alfalfa tissue culture is established:which is benifical to the gene transformation of alfalfa. 相似文献
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南瓜降糖功能及其系列食品加工技术 总被引：3，自引：0，他引：3
阐述了南瓜在糖尿病辅助治疗方面的功能特性,介绍了南瓜降糖主要制品南瓜全粉、南瓜脆片、南瓜果酱和南瓜肉汁的工艺流程和操作要点。 相似文献
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