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生态旅游是在大力提倡旅游环境保护的基础上提出来的,随着可持续发展策略和相关措施的不断深入,生态旅游已经成为旅游业发展的热点.尤其是生态环境良好、风光秀丽独特的自然保护区在进行旅游开发的时候,更应当坚持生态旅游开发的思路,采取生态旅游开发和管理措施,保证自然保护区旅游开发的科学性和持续性.本文以宁夏中卫沙坡头国家级自然保护区的生态旅游发展为实例,对自然保护区的生态旅游开发和管理进行了分析. 相似文献
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草原类型自然保护区现状及其生态旅游发展 总被引:1,自引:1,他引:0
中国草原类型自然保护区的数量、面积以及保护区内资源有效利用的现状与全国其他行业所属自然保护区相比明显滞后。依托草原自然保护区生态旅游资源数量大、类型多、市场条件佳等优势,分析其发展生态旅游的必要性以及应该遵循的5个原则,即保护优先、科技先行、生态旅游与草原文化相结合、自然保护区和周边社区共同受益及可持续发展原则。 相似文献
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自然保护区生态旅游的SWOT分析 总被引:1,自引:0,他引:1
生态旅游对自然保护区的可持续发展具有重要的意义,与此同时也引发诸多矛盾。本文采用SWOT分析方法,对我国自然保护区生态旅游的优势、劣势、机会和威胁进行比较系统的分析,并提出我国自然保护区生态旅游发展的相关战略,旨在解决保护与开发的矛盾,促进我国自然保护区生态旅游的可持续发展。 相似文献
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据国家林业局2月初公布的数据显示,200&年我国湿地工程共投入3.66亿元,开展了12个国家级自然保护区建设和48个湿地保护和恢复工程。
据国家林业局局长贾治邦介绍,目前中国已建立湿地自然保护区470多处,将45%约1700多万hm^2的自然湿地纳入保护区严格保护。其中对世界惟一的高原湿地青海三江源自然保护区的建设,不仅有利于中国的生态安全,也保护了湄公河流域下游缅甸、老挝、泰国、柬埔寨和越南5国的生命线。 相似文献
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论述了吉林向海国家级自然保护区湿地类型及湿地保护的重要性,从可持续发展的角度,探索目前向海湿地现状及存在的问题,提出了向海湿地生态系统保护利用的科学对策。 相似文献
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吉林向海国家级自然保护区地处大兴安岭南部东侧松辽平原西部边缘,地形特征为蒙古高原和东北平原的过渡地带,是以保护丹顶鹤为主的珍稀水禽和沙丘蒙古黄榆天然林为目的的内陆湿地和水域生态系统类型自然保护区。她是我国东北松辽平原的一块宝地,科尔沁草原的一颗璀璨明珠。 向海自然保护区美在天然,贵在原始,地广人稀,气候适宜。在保护区内有三大水系交汇贯通,南有霍林河,西有额穆泰河,北有挑儿河引水系统,从而形成向海水库和兴隆水库两个大面积的芦苇沼泽区。风积沙丘呈带状分布,草原、湖泊、沼泽、沙丘、榆林、灌丛交错相间,… 相似文献
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为了解甘肃安西自然保护区湿地与水鸟动态的关系,在1988~1989年和2002~2004年两次对该湿地水禽进行调查,湿地公布的鸟类108种,其中《湿地公约》定义的水禽有44种,国家保护的Ⅰ级鸟类1种,Ⅱ级保护鸟类1种。2002~2004年记录31种。2002~2004年较1988~1989年增加5种新纪录,但减少13种。2002~2004年仅秋季遇见水鸟的数量29.50只/km2,多于1988~1989年的17.79只km2,同时秋季水鸟种类2002~2004年为20种,也多于1988~1989年的13种,保护区水禽种类和数量变化的一个主要因素是自然和人为的影响,因此,应该制定适宜安西自然保护区的法律法规,加强对保护区水鸟的保护。 相似文献
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通过对芦芽山保护区生态旅游景区环境容量的调查分析,表明芦芽山生态旅游景区年环境容量为472 480人次,游客年容量为3303 840人次,实际年游客量为160 276人次,为游客年容量的52.75%.并对芦芽山自然保护区今后开发生态旅游提出了合理的建议和措施,从而使保护区的生态效益、经济效益、社会效益得到充分发挥,生态旅游得到可持续发展. 相似文献
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魏静 《四川畜牧兽医学院学报》2009,(4):28-32
在现代法律秩序中,商会自治规范是制定法的基础和必要的补充,甚至在某些方面替代了制定法;商会自治规范主要包括商会组织规范、行为规范、惩罚规范以及争端解决规范等;其效力仅及于其内部成员;商会自治规范和制定法之间存在冲突,但也存在整合的基础。 相似文献
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本文概述了猪的毛色类型、猪的毛色遗传模式,着重综述了猪毛色基因分子基础的研究进展,指出存在问题并就未来发展方向做了思考。 相似文献
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以国际标准强毒R株人工感染非免疫产蛋鸡,定时扑杀,分别从鼻窦、眶下孔、气管、肺、气囊、卵巢和输卵管分离MG,并收集感染鸡所产蛋分离MG。结果表明,人工感染48小时后上、下呼吸道及肺已被全面感染,96小时气囊已被感染,120小时输卵管已能分离到MG,卵巢始终分离不到MG。人工感染鸡自144小时便能在其所产蛋中分离出MG。药物治疗能在72小时内消除感染,油乳剂苗则需24天后逐渐降低蛋内MG分离率,药物卵内注射、种蛋药浴、高温处理均能杀死卵内MG,但以研制的种蛋浸泡剂药浴效果为最好。 相似文献
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REASONS FOR PERFORMING STUDY: Centesis of the bicipital bursa using an 8.9 cm long spinal needle has been reported but the alternative of employing a 3.8 cm long hypodermic needle requires validation. OBJECTIVE: To compare the efficacy of 2 different methods of centesis of the bicipital bursa and to evaluate the usefulness of ultrasonographic imaging to determine the location of solution administered when centesis of the bursa is attempted. METHODS: For Trial 1, 6 clinicians, who had no previous experience of centesis of the bicipital bursa, attempted to inject a solution composed of an aqueous radiopaque contrast medium and physiological saline solution (PSS) into the bicipital bursae of 2/12 horses using the previously described distal approach to inject one bursa and a proximal approach to inject the contralateral bursa. The bicipital tendon and bursa were examined ultrasonographically before and after injection; and both shoulders were examined radiographically to identify the location of the medium. In Trial 2, another 6 clinicians, also with no previous experience of centesis, repeated Trial 1, using 6 horses, but the radiopaque contrast medium was mixed with air instead of PSS. RESULTS: Accuracy of centesis using the proximal approach was 39% and that of the distal approach 28%. Ultrasonographic examination of the shoulder allowed the location of solution and air to be accurately predicted in all 12 shoulders examined. CONCLUSIONS: Clinicians who have had no previous experience performing centesis of the bicipital bursa are unlikely to be successful in centesis using either approach. Radiographic examination after injecting a radiopaque contrast medium may be necessary to assess the success of centesis especially if bursal fluid is not obtained during centesis. Injecting air along with the radiopaque contrast medium provides more accurate ultrasonographic confirmation of centesis and better radiographic definition than does injection without air. 相似文献
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Effects of size of ingestively masticated fragments of plant tissues on kinetics of digestion of NDF
Ingestively masticated fragments were collected and sized via sieving. Different sizes of esophageal masticate and ruminal digesta fragments, and ground fragments of larger masticated pieces were incubated in vitro, and undigested NDF remaining at intervals of up to 168 h of incubation was determined. The ruminal age-dependent time delay (tau) for onset of digestion of NDF was positively correlated (P < 0.004) with the mean sieve aperture estimated to retain 50% of the fragments between successive sieve apertures (MRA). Degradation rate of potentially degradable NDF (PDF) and level of indigestible NDF were not related (P > 0.10) to MRA of masticated and ground fragments. Estimates of tau were positively related to MRA, with slopes of bermudagrass < corn silage < ruminal fragments of corn silage. It was concluded that fragment size-, and consequently, ruminal age-dependent onset of PDF degradation of a mixture of different fragment sizes results in an age-dependent rate of degradation of the more rapidly degrading of two subentities of PDF. Models are proposed that assume a tau before onset of simultaneous degradation of PDF from two pools characterized as having gamma-modeled age-dependency and age-constant rates. The ruminal age-dependent pool seems to be associated with the faster-degrading pool, and its rate parameter increases with range in MRA in the population of fragments. Conceptually, the ruminal age-dependent rate parameter for PDF degradation seems to represent a composite of several effects: 1) effects of the size-dependent tau; 2) range in MRA of the population of ingestively masticated fragments; and 3) subentities of PDF that degrade via more rapid age-dependent rates compared with subentities of PDF that degrade via age-constant rates. The estimated fractional rates of ruminative comminution of ingestively masticated fragments (0.060 to 0.075/h) were of a magnitude similar to the mean fractional rates of PDF digestion (0.030 to 0.085/h), which implies that ruminative comminution may be first-limiting to fractional rate of PDF digestion. The in vivo roles of ingestive and ruminative mastication of fragments on PDF degradation must be considered in any kinetic system for estimating PDF digestion in the rumen. These results and others in the literature suggest that the rate of surface area exposure rather than intrinsic chemical attributes of PDF may be first-limiting to degradation rate of PDF in vivo. 相似文献