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不同日粮组成对蛋鸡生产性能及鸡蛋品质的影响 总被引：2，自引：1，他引：1
选用５７６只１５４日龄海赛克斯蛋鸡探讨不同日粮组成对蛋鸡生产性能及鸡蛋品质的影响。共计３个处理，每个处理４个重复，每个重复４８只鸡，全阶梯三层笼养，自由采食、饮水，进行产蛋率大于８０％的饲养试验。试验期为４周。试验结束后，对各处理的产蛋率、只日产蛋量、料蛋比、破蛋率、每千克蛋耗料成本及蛋的品质指标进行统计分析。试验结果表明，采食３种日粮的试鸡在产蛋量、破蛋率、采食量等指标差异不显著（Ｐ＞０．０５），但采食无鱼粉日粮的试鸡料蛋比、死淘率最低，每千克蛋饲料成本最低（Ｐ＜０．０５），且产蛋率最高（Ｐ＜０．０５）。蛋形指数、蛋壳厚度、蛋壳强度、哈氏单位４项指标上３个处理间无明显差异（Ｐ＞０．０５）。 相似文献
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为了筛选出绿豆蛋白粉无鱼粉蛋鸡日粮，针对鱼粉、绿豆蛋白粉的营养特点及生产中使用的绿豆蛋白粉无鱼粉蛋鸡日粮的缺点，通过添加蛋氨酸、多维素、酵母粉等设计了含绿豆蛋白粉分别为８％、１０％和１３％的无鱼粉日粮对２５２０只２６０日龄商品代海赛克斯产蛋鸡进行６０天三重复饲喂对比试验。结果表明：含１０％绿豆蛋白粉无鱼粉日粮与喂含８％和１３％绿豆蛋白粉无鱼粉日粮相比为最佳日粮，平均产蛋率（８６．１２％）差异显著（Ｐ＜０．０５），分别高出０．７５和０．９０个百分点，提高０．８８％和１．０６％；平均蛋重和饲料转化率差异不显著（Ｐ＞０．０５），但平均蛋重仍分别提高０．１７％和０．４２％，饲料转化率仍分别提高１．３５％和０．９０％；死淘率差异不显著（Ｐ＞０．０５）；每ｋｇ饲料单价比８％绿豆蛋白粉日粮低０．０２８元，下降１．７９％；每ｋｇ鸡蛋利润差异极显著（Ｐ＜０．０１），分别提高９．０２％和８．２３％。 相似文献
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添加氨基酸稀土螯合物降低日粮赖氨酸水平喂猪试验 总被引：1，自引：0，他引：1
本试验结果表明，猪日粮中添加０２％的氨基酸稀土螯合物（含螯合物中的赖氨酸，日粮赖氨酸水平为０８６％），猪的生长速度与添加０１５％赖氨酸（日粮赖氨酸水平为０９９％，达到标准需要）无显著差异（Ｐ＞００５），经济效益优于添加０１５％赖氨酸组。每千克增重可降低成本０３５元，少耗赖氨酸４４克，少耗蛋白质２７５克，少耗饲料０１４千克。添加螯合物后，另外补加赖氨酸０１３％、００５％，试猪的增重、饲料转化率等与单独添加螯合物、０１５％赖氨酸组差异不显著（Ｐ＞００５）。 相似文献
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将６４８只海克斯商品代产蛋鸡随机组群进行九种处理来确定三咎不同含钙量日粮和三种不同含磷量日粮（０．３０％、０．４０％和０．５０％）对产蛋高峰期中产蛋鸡产蛋性能、胫骨重、胫骨强度、胫骨灰分等的影响,当日粮中磷钙水平增加时对饲料消耗量也随之增;增加日粮中钙含量时,蛋的比重也随之呈线性增高;但增加日粮磷含量时对蛋批重无影响。日粮中钙磷水平对产蛋率、体重无显著影响,随着日粮中钙含量增加,鸡的胫骨强度、胫骨 相似文献
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为了筛选出绿豆蛋白粉无鱼粉蛋白粮,针对鱼粉,绿豆蛋白粉的营养特点及生产中使用的啼蛋白粉无鱼粉蛋鸡日粮的特点,通过添加蛋氨酸,多维素,酵母粉等设计了含绿豆蛋白粉分别为８％,１０％和１３％的无鱼粉日粮对２５２０只２６０日龄商品代海赛克期产蛋鸡进行６０天三重复饲喂对比试验。结果表明：含１０％绿豆蛋白粉无鱼粉日粮与喂含８％和１３％绿豆蛋白粉无鱼粉日粮相比为最佳日粮,平均产蛋率差异显著,分别高出０．７５和０ 相似文献
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在高温季节（２５．５～３９．４℃），配制５种日粮，分别将其喂蛋鸡。第一种日粮（对照组）按现行饲养标准配制。对第２～５种，不同程度地调整其中代谢能、粗蛋白及必需氨基酸等主要养分的浓度。饲养结果表明：与对照组比较，采食第４种日粮的蛋鸡产蛋率提高１５．２０％（Ｐ＜０．０１），饲料用于产蛋的效率提高１５．７％（Ｐ＜０．０１），产蛋饲料成本降低８．９％（Ｐ＜０．０５）；采食第５种口粮的蛋鸡产蛋率提高１０．５５％（Ｐ＜０．０５），饲料用于产蛋的效率提高９．９９％（Ｐ＜０．０５），但产蛋饲料成本增加１１．６７％（Ｐ＜０．０５）；采食第２种日粮的蛋鸡产蛋率和饲料效率降低，饲料成本提高，但均不显著（Ｐ＞０．０５）；采食第３种日粮的蛋鸡产蛋率、饲料效率和产蛋饲料成本均与对照组相似。 相似文献
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任连泉 《动物科学与动物医学》1999,16(3):25-26
采用由钙磷各三个水平配成九种日粮，对产蛋鸡进行阶段性钆喂试验，结果表明：第五组（钙：３．７５％，磷：０．５４％）处理较为理想。 相似文献
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赖氨酸是猪的第一限制性氨基酸，其对畜禽生产性能的影响机制，很早就被人们作为研究对象。此次试验主要是研究在“南方猪饲养标准”赖氨酸水平基础上添加不同水平赖氨酸对约×绥（绥阳猪）Ｆ１生长猪增重效果的影响。１材料与方法 （１）试验设计：本试验采用单因素设计，日粮赖氨酸水平分别为我国南方猪饲养标准（１９８２）２０～３５ｋｇ生长猪赖氨酸需要量的７０％、８０％、９０％、１００％、１１０％、１２０％、 １３０％，同时考虑日粮的蛋氨酸、胱氨酸、色氨酸等必须氨基酸水平。赖氨酸为进口氨基酸．纯度≥９９％。 （２）试验… 相似文献
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为探讨低蛋白质日粮赖氨酸水平对泌乳母猪生产性能和氮排泄量的影响,选用3～6胎次、体况相似、预产期相近的60头长大二元杂交母猪,随机分成4个组,每组15头母猪,分别饲喂总赖氨酸水平为0.90％、0.95％、1.00％和1.05％的4种低蛋白质氨基酸平衡日粮,泌乳期21 d.结果表明,0.90％组和0.95％组仔猪窝均增重和平均日增重显著高于1.00％组和1.05％组（P＜0.05）,但0.90％组和0.95％组间、1.00％组和1.05％组间不显著（P＞0.05）;0.90％组母猪泌乳期体重损失显著高于其他3组（P＜0.05）,但其他3组间差异不显著（P＞0.05）;赖氨酸水平对母猪泌乳期日均采食量和断奶发情间隔影响不显著（P＞0.05）;0.90％组和0.95％组氮表观消化率显著高于1.00％组和1.05％组（P＜0.05）、粪氮排泄量显著低于1.00％和1.05％组（P＜0.05）.可见,在低蛋白质氨基酸平衡日粮的条件下,泌乳母猪赖氨酸适宜摄入量为50.05 g/d,即日粮赖氨酸水平为0.95％,能获得较好的生产性能. 相似文献
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日粮不同蛋白质,赖氨酸水平对泌乳母猪生产性能的影响 总被引：3，自引：0，他引：3
选用２～３胎母猪９０头，随机分成６个品种相同的组，试验日旧白质为１４％和１６％，赖氨酸为０．６％、０．８％、１．０％，通过对比饲养试验、母乳测定，结果表明：当日粮含ＤＥ约３３２０ｋｃａｌ／ｋｇ．ＣＰ为１６％，Ｌｙｓ为０．８％～１．０％，母猪日采食量为４．５ｋｇ时，泌乳力好，哺乳仔猪增生最快，２１日龄头均重达６．０５～６．１２ｋｇ，与其它处理组相比差异极显著（Ｐ〈０．０１），各处理组间仔猪下 发生率 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