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针对鄂托克旗草原利用现状和存在问题,提出草原生态保护与建设发展对策,全面贯彻落实草原"双权一制"工作,实行依法治草,积极开展人工草地建设,以治理退化草地为重点,大力加强天然草原植被恢复与建设力度,全面发展舍饲养殖、禁牧、休牧、饲草料加工调制等技术措施,实行以草定畜,解决畜草矛盾,保护草原生态,实现经济生态和社会效益的全面提高,促进鄂托克旗基本草牧场良性循环. 相似文献
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保护和改善草原生态环境实现呼伦贝尔畜牧业的可持续发展 总被引：2，自引：0，他引：2
针对呼伦贝尔草原利用现状和存在的问题，提出了草原生态保护和建设的发展对策，实行依法治草，积极开展以人工草地建设和治理退化草地为重点，大力加强牧草种子工程建设等技术措施，解决畜草矛盾，维护草原生态平衡，实现草地畜牧业的可持续发展。 相似文献
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笔者针对草原存在的生态问题,对于草原生态环境日趋恶化的情况,提出对草原生态的保护及发展对策,实行依法治草,加强建设人工草地,解决因草地退化而产生的畜草问题,使得草原生态平衡,实现畜牧业的可持续发展。 相似文献
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根据《中华人民共和国草原法》和青海省实施《中华人民共和国草原法》细则等有关法律法规的规定,结合化隆县草地面积大,草地类型丰富,界线权属不明确,草原承包工作难度大,超载放牧,草地鼠害严重,毒杂草多的问题,探讨了适宜化隆县草原管理的途径:成立乡镇草原管理委员会,核定草场合理载畜量,以草定畜,实行封山育草、人工种草和退耕还草等草原建设管理对策。 相似文献
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《养殖与饲料．饲料世界》2009,(1)
“以科学发展观指导草原保护建设”研讨会在京举办,与会代表提出大力发展草地农业,实现藏粮于草。本报讯11月20日,农业部草原监理中心在北京举办了“以科学发展观指导草原保护建设”为主题的研讨会。农业部原副部长、中国草学会名誉理事长洪绂曾,有关专家及部分省区草原工作负责人参加了会议。中国工程院院士任继周等专家认为,要打破农区牧区经营发展界限,统筹农区和牧区,统筹农业和草原发展,充分发挥土地的资源潜力,大力发展草地农业,实现藏粮于草。 相似文献
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草原建设是草地畜牧业生产中的一项首要任务，而草原建设的中心是基本草场，建设基本草场的最有效形式之一是建设草库伦。搞好草库伦建设能够稳定草地畜牧业的发展，提高其经济效益。 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