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随着人们生活质量的逐步提高和保健意识的增强,有机蔬菜因无农药残留而逐渐成为了人们餐桌上的新捧,根据国家《有机食品认定的管理条例》规定,有机食品在原料生产和产品加工过程中不使用农药、化肥、生长激素、化学添加剂、化学色素和防腐剂等化学物质.由此,有机蔬菜的栽培生长就对土地和肥料以及日常管理就提出了新的要求.
1 前景分析
有机蔬菜因无污染、无药物残料更多受到人们青睐,近年来越来越多的人追求有机蔬菜,无公害蔬菜,据统计,在各大超市中,有机蔬菜销售额占同类蔬菜的30%以上,且价格高出同类蔬菜的10%-20%之间,被更多的誉为“朝阳产业”滨州市无棣县除种植粮棉外,具有大力发展绿色、生态、有机农业产业园的潜质. 相似文献
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祁寯藻自幼天资聪慧,4岁即识字,6岁入家塾,10岁写作文章,读书过目不忘。被人们誉为神童。嘉庆十九年(1814年),22岁的祁寯藻赴京参加会试。中进士,被选为翰林院庶吉士。嘉庆二十四年任翰林院编修,从此步入仕途。 相似文献
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社区体育与学校体育有机结合发展的研究 总被引:1,自引:0,他引:1
詹英 《哈尔滨体育学院学报》2007,25(3)
随着全民健身活动的开展,社区体育越来越受到人们的重视。本文通过分析社区体育和学校体育的内在关系,进而提出了社区体育和学校体育有机结合发展的研究方案。 相似文献
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传统文化与少数民族传统体育文化研究 总被引:4,自引:0,他引:4
我国传统文化博大精深,多姿多彩的少数民族传统体育文化就是中华传统文化的有机组成部分,并且已经深深地融入到了人们的生活中。研究传统文化与少数民族传统体育文化特征,妥善解决整理和继承,推广与发展,有助于深入了解少数民族传统体育文化。 相似文献
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生物周期与高校体育系学生的运动损伤 总被引:1,自引:0,他引:1
本文对高校体育系部分学生的运动损伤进行了调查分析,认为体育运动者受伤原因除直接因素和潜在因素外,还与其生物周期有关。因此,可以运用生物周期理论来提高人们的工作效率和运动成绩,以及为预防运动损伤的发生提供科学的依据。 相似文献
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本文结合某高速公路红粘土地区建设项目,对利用其修筑路堤的技术、相应特殊的施工工艺等进行分析,提出红粘土路基的修筑技术。可为今后红粘土地区公路建设事业提供-定的设计施工依据,提高工程质量,具有巨大的经济、社会效益。 相似文献
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This study examined the effect of carbohydrate ingestion on metabolic and performance-related responses during and after a simulated 1h cycling time trial. Eight trained male cyclists (VO 2 peak = 66.5ml kg -1 min -1 ) rode their own bicycles mounted on a windload simulator to imitate real riding conditions. At a self-selected maximal pace, the cyclists performed two 1h rides (separated by 7 days) and were fed either an 8% carbohydrate or placebo solution. The beverages were administered 25 min before (4.5ml kg -1 ) and at the end (4.5ml kg -1 ) of the ride. With carbohydrate feeding, plasma glucose tended (P = 0.21) to rise before the time trial. Compared with rest, the plasma glucose concentration decreased significantly (P < 0.05) at the end of both rides, with no statistically significant difference being observed between treatments. Thereafter, plasma glucose increased significantly (P < 0.05) at 15 and 30 min into recovery, and was significantly higher at 30 min during the carbohydrate trial compared with the placebo trial. No significant changes in plasma free fatty acids were observed during the ride. However, a significant increase (P < 0.05) in free fatty acids was found at 15 and 30 min into recovery, with no difference between trials. Mean power output was significantly (P < 0.05) greater during the carbohydrate compared with the placebo trial (mean - S.E.: 277-3 and 269-3W, respectively). The greater distance covered in the carbohydrate compared with the placebo trial (41.5-1.06 and 41.0–1.06km, respectively; P < 0.05) was equivalent to a 44s improvement. We conclude that pre-exercise carbohydrate ingestion significantly increases endurance performance in trained cyclists during a 1h simulated time trial. Although the mechanism for this enhancement in performance with carbohydrate ingestion cannot be surmised from the present results, it could be related to a higher rate of carbohydrate oxidation, or to favourable effects of carbohydrate ingestion on the central component of fatigue. 相似文献
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Roy J. Shephard 《Journal of sports sciences》2013,31(7):603-620
The biology and medicine of rowing are briefly reviewed. Effort in a 2000 -m race is about 70% aerobic. Because the boat (and in some instances a cox) must be propelled, successful competitors are very tall, with a large lean mass and aerobic power. Large hearts may lead to erroneous diagnoses of a cardiomyopathy. Large respiratory minute volumes must be developed by chest muscles that are also involved in rowing. The vital capacity is typically large, and breathing becomes entrained. Expiration cannot be slowed relative to inspiration (as normally occurs at high rates of ventilation) and the limiting flow velocity may be reached, with the potential for airway collapse. Performance is strongly related to the power output at the ‘anaerobic threshold’, and lactate measures provide a guide to an appropriate intensity of endurance training. Peak blood lactate levels are higher in males (commonly 11–19 mmol·l -1 and occasionally as high as 25 mmol·l -1) than in females (9–11 mmol·l -1), probably because males have a greater muscle mass in relation to blood volume. The skeletal muscles are predominantly slow twitch in type, developing an unusual force and power at low contraction velocities. Many rowers have a suboptimal diet, eating excessive amounts of fat. Lightweight rowers also have problems of weight cycling. Aerobic power and muscle endurance often change by 10% over the season, but such fluctuations can be largely avoided by a well-designed winter training programme. Injuries include back and knee problems, tenosynovitis of the wrist and, since the introduction of large blades, fractures of the costae. 相似文献
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重新认识体育的社会关联 总被引:3,自引:1,他引:2
体育与政治之间存在一个悖论,体育的发展与经济实力之间没有直线相关,体育与教育部分重叠,体育与宗教最为近缘,体育可借用科学手段,体育的艺术禀性日益明显,体育与养生反映着两种人生观。 相似文献
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本文在专家访谈、问卷调查、数理统计和文献资料分析的基础上,探析了上海社区体育竞赛参与者的特点、参与者对社区体育赛事运作管理的看法等问题。在此基础上从引进社区体育赛事的志愿者、整合社区体育赛事的各种资源、开发社区体育竞赛的无形资产、组建非营利性的专业团队、规范社区体育赛事的服务管理等方面提出了进一步满足上海社区居民日益增长的体育竞赛参赛需求的对策与措施。 相似文献
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对全面把握游泳训练环节的探讨 总被引:4,自引:0,他引:4
从系统观点出发,结合训练实践,对全面把握游泳训练环节进行探讨。认为应强化非智力因素在运动员多年训练中的作用,在育材全过程中不断选材,从整体上把握动态训练的全过程,把培养高水平运动员的整个过程置于一个严格的科学控制之下。 相似文献
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影响和限制耐力性运动项目的成绩的生理因素是复杂的和多方面的,取决于训练的强度和运动成绩.大强度持续性运动可导致呼吸肌疲劳.运动性呼吸疲劳可能在决定运动耐量方面起到关键的作用:一方面通过直接影响运动肌力量的生成(外周疲劳),另一方面,通过肢体用力自感不安反馈引起工作肌运动单位输出功率下降(中枢疲劳).对呼吸肌进行训练,可能有助于提高耐力性项目的运动成绩. 相似文献
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结合欧洲足球技战术的发展特点,就鲁能泰山足球队的体能训练、技术训练、防守阵型、进攻方式、定位球、职业态度、球星培养等诸方面所存在的不足进行了分析,提出相应的改进意见。 相似文献
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朱新新 《体育科技文献通报》2010,18(3):52-53,57
本文运用文献资料法,逻辑分析法,在遵循逻辑学、哲学、心理学原理的前提下,对竞技健美操技术的概念进行了界定,对竞技健美操技术进行了分类研究,在此基础上分析了竞技健美操技术的结构,为系统、科学的组织竞技健美操的教学和训练提供理论上的参考,为促进竞技健美操理论体系的完善和协调发展做出一定的贡献。 相似文献