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雉鸡脱温后至性成熟前的这一段时间为雉鸡的育成期。这一阶段正是雉鸡长肌肉、长骨骼和增重速度最快的时期。雉鸡育成期的饲养和管理是否得当，将直接关系到雉鸡能否早日作为商品上市或其作为种用性能的好坏。为此，笔者现将雉鸡育成期阶段的饲养管理经验介绍如下：１饲养方式１．１立体笼养法适用于以肉用为目的大批饲养雉鸡，在育成期采用立体笼养法，可以获得良好效果。与立体笼养育雏相比，育成期雉鸡的饲养密度应适当降低，３０日龄时脱温，结合分群疏散密度，使其饲养密度控制在２０～２５只／m２，以后每两周左右疏散一次，使其密度… 相似文献
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雉鸡脱温后至性成熟前的这一段时间为雉鸡的育成期。这一阶段正是雉鸡长肌肉、长骨骼和增重速度最快的时期。雉鸡育成期的饲养和管理是否得当，将直接关系到雉鸡能否早日作为商品上市或其作为种用性能的好坏。笔者将雉鸡育成期的饲养管理经验介绍如下。一、饲养方式１．立体笼养法：适用于以肉用为目的的大批饲养的雉鸡，在育成期采用立体笼养法，可以获得良好效果。与立体笼养育雏相比，育成期雉鸡的饲养密度应适当降低，３０日龄时脱温，应结合分群疏散密度，使其饲养密度控制在２０～２５只／米２，以后每两周左右疏散一次，使其密度减半… 相似文献
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雉鸡,又名山鸡、野鸡、环颈雉,肉质细嫩,味道鲜美,营养丰富,是有名的野味佳肴,且由于雄雉鸡尾长,羽色光彩鲜艳,还具有观赏价值.随着人们对食品绿色、安全、营养要求的逐渐提高,雉鸡也越来越受到欢迎,雉鸡养殖具有广阔的市场前景.雏雉鸡经4～5个月的饲养,雌雉鸡体重达1kg,雄雉鸡体重达1.3～1.4kg以上的体重时即可上市,特别是在入冬以后.雉鸡肉味尤其鲜美,是元旦至春节期间用作礼品互赠的佳品.饲养雉鸡首先要了解其生长特性,结合精心的饲养管理,才能取得可观的经济效益. 相似文献
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致富新门路─—雉鸡的饲养技术雉鸡，又称山鸡、野鸡，属野生禽类，主要分布于各地山林之中。雉鸡肉质鲜美，营养丰富，是高蛋白低脂肪食品，是国内外饭店、宾馆餐桌上的上等菜肴。雉鸡羽毛美丽鲜艳，制成高级工艺品可出口创汇。雉鸡在国际市场上颇受欢迎，国内贸易部门收... 相似文献
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丁卫星 《上海畜牧兽医通讯》1993,(3):29-29
雉鸡,俗称山鸡、野鸡,近年来作为肉用珍禽被人大量繁殖与饲养。目前对雉鸡的能量、蛋白质等营养需要了解甚少,在实际生产中,大都采用家鸡的全价饲料,往往导致饲养成本较高,不利于商品化生产。本文介绍雉鸡的营养需求及饲料配方等,供饲养者参考。一、营养需要雉鸡对饲料营养要求比家禽为高。其日粮中代谢能含量可为2700～3100千卡/千克,可依不同生长期、生产性能和生产目的而有所不同。有人认为,2970千卡 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