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《中国草食动物科学》2015,(6)
为了探讨郏县红牛不同年龄段的生长速度和育肥效果,选择53头郏县红牛,根据年龄分为3组,即6月龄组(A)、12月龄组(B)和24月龄组(C),进行90 d的育肥试验。每月定期测定体高、体斜长、胸围、管围、坐骨端宽等体尺指标和体重指标。结果表明:体尺平均增长幅度由快到慢依次为A组、B组、C组,体重平均增长幅度由快到慢依次为C组、A组、B组。体高A组与B组、C组相比差异极显著(P0.01);体斜长3组之间相比差异极显著(P0.01);胸围A组与B组相比差异显著(P0.05),A组、B组与C组相比均差异极显著(P0.01);管围B组与C组相比差异极显著(P0.01);坐骨端宽3组相比均差异不显著(P0.05);A组平均日增重0.93 kg,B组平均日增重0.72 kg,C组平均日增重1.11 kg,各组之间均差异极显著(P0.01)。说明郏县红牛随着年龄的增长各项指标均不断增长,生长期体尺指标增长速度高于育肥期,而育肥期体重指标增长速度高于生长期。 相似文献
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为了研究复合矿物质舔砖对育肥羊生长性能及生化指标的影响,试验采用分组饲喂的方法,将体重和体尺相近、体况健康、生长发育良好的羊只分为对照组、舍内育肥组和放牧育肥组,对照组饲喂基础日粮,其他两组在基础日粮基础上补饲舔砖。结果表明:补饲复合矿物质舔砖可明显提高育肥羊日增重,尤其是舍饲育肥组羊日增重极显著提高(P0.01)。补饲复合矿物质舔砖可有效提高育肥羊日粮的蛋白质利用率,提高机体免疫力。说明补饲复合矿物质舔砖可以提高育肥羊生长性能和免疫力。 相似文献
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选择出生重及出生日期相近、生长发育正常的滩羊羔羊60只,随机分为4组,分别为30、45和60日龄断奶组,120日龄哺乳组为对照,各选取15只羔羊进行育肥试验,直至120日龄。结果表明:在120日龄时,试验组羔羊的体重和体尺均极显著高于对照组(P<0.01)。其中体重最高的是60日龄断奶组羔羊,为36.25 kg,日增重(75～120 d)达278.67 g,极显著高于对照组的23.27 kg和136.0 g,经济效益比对照组高出80.12元/只。 相似文献
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为了筛选出一种科学高效的滩羔羊育肥饲料配方,通过对40只3~4月龄羔羊进行了为期30 d的试验,采用不同饲料营养配方进行增重与饲料转化率试验,从中筛选出增重快,效益高的最佳饲料配方,在育肥30 d内,日增重230±20.41g,纯收入达58.78元。 相似文献
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《云南畜牧兽医》2020,(4)
为研究不同浓缩料(Ⅰ、Ⅱ、Ⅲ)对云上黑山羊与本地黑山羊杂交羊育肥性能的影响,选择27只公羊,随机分成3组,每组9只羊,分为2个育肥阶段(27～37 kg、38～45 kg),饲喂不同浓缩料配方日粮,育肥期120 d。结果表明:2个阶段的末重、平均增重和日增重呈现相同的变化规律,均表现为Ⅱ组Ⅰ组Ⅲ组。第1阶段,Ⅱ组、Ⅲ组的末重差异显著(P0.05),Ⅱ组显著高于Ⅲ组3.93 kg;Ⅰ组、Ⅱ组的平均增重、日增重均极显著高于Ⅲ组(P0.01)。第2阶段,Ⅱ组末重最大,为46.36 kg,且极显著高于Ⅲ组;平均增重和日增重3组间均差异不显著(P0.05),但Ⅱ组与Ⅰ组、Ⅲ组相比,平均增重和日增重分别多1.28 kg、1.51 kg和21.38 g、25.09 g。全阶段,Ⅱ组与Ⅲ组末重、平均增重、日增重差异极显著(P0.01),Ⅰ组和Ⅲ组的平均增重、日增重差异显著(P0.05)。总的结果显示,在本试验条件下,Ⅱ组日粮组成最适合云上黑山羊与本地黑山羊杂交公羊的生长发育,其平均增重、日增重、增重利润等育肥性能表现最佳。 相似文献
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柴兆军 《青海畜牧兽医杂志》2006,36(4):17-18
选用3月龄羔羊40只,随机分为4组。三个试验组绵羊的基础日粮中添加益生素0.05g,0.10g,0.15g/只,d,对照组绵羊不添加益生素,共饲喂46d,以观察益生素对羔羊增重及生长发育的影响。试验结果表明:绵羊添加益生素0.10g/只,d时,育肥羔羊的增重、日增重、料重比、钙、磷、粗蛋白的表观消化率最高,即羔羊饲料中0.10g/d剂量的益生素,可使育肥羔羊得到最佳的增重效果。 相似文献
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本研究在杜洛克、巴克夏猪分别与大凉山黑猪杂交的基础上,进行三元杂交,并比较了所产三杂后代(F2代)的育肥性能。所测定数据用Von Bertalanffy生长曲线拟合模型进行分析,结果显示,大凉山黑猪杂交所得F2代育肥120天后日增重在627.79 g以上,料肉比达到2.77:1,生长拐点日龄为193.8~195.3天,拐点体重为90.4~92.5 kg。本研究所测得的体长、胸围等体尺指标可以作为衡量生长发育的重要指标,列入《大凉山黑猪开发利用》的选育方案。 相似文献
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为了探讨云南黑山羊的生长发育规律,对放牧加补饲条件下云南黑山羊的体重、体尺进行测定,对所测定数据进行分析。结果表明:云南黑山羊体重增重规律与其他肉羊增重规律相似,体尺累积生长平缓上升,同时云南黑山羊具有早期生长发育快的特点,公羊、母羊体重从出生到3月龄时达到绝对生长高峰,日增重分别达到201.11g和162.44g;绝对生长曲线总体呈下降趋势,提示应加强羔羊断奶后的饲养管理。云南黑山羊生长发育阶段体重和体尺的相关性与性别有关,公羊10月龄体重、体尺的相关性高于3月龄;母羊相反,同时,母羊3月龄体重与体尺的相关性均为正相关(P0.01);3月龄公、母羊胸围与体重的具有较高的相关性,相关系数分别为0.85和0.75。 相似文献
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Meschan EM Peham C Schobesberger H Licka TF 《Veterinary journal (London, England : 1997)》2007,173(3):578-584
As there is no statistical evidence that saddle fit influences the load exerted on a horse's back, this study was performed to assess the hypothesis that the width of the tree significantly alters the pressure distribution on the back beneath the saddle. Nineteen sound horses were ridden at walk and trot on a treadmill with three saddles differing only in tree width. Kinetic data were recorded by a sensor mat. A minimum of 14 motion cycles were used in each trial. The saddles were classified into four groups depending on fit. For each horse, the saddle with the lowest overall force (LOF) was determined. Saddles were classified as "too-narrow" if they were one size (2 cm) narrower than the LOF saddle, and "too-wide" if they were one size (2 cm) wider than the LOF saddle. Saddles two sizes wider than LOF saddles were classified as "very-wide". In the group of narrow saddles, the pressure in the caudal third (walk 0.63 N/cm(2)+/-0.10; trot 1.08 N/cm(2)+/-0.26) was significantly higher compared to the LOF saddles (walk 0.50 N/cm(2)+/-0.09; trot 0.86 N/cm(2)+/-0.28). In the middle transversal third, the pressure of the wide saddles (walk 0.73 N/cm(2)+/-0.06; trot 1.52 N/cm(2)+/-0.19) and very-wide saddles (walk 0.77 N/cm(2)+/-0.06; trot 1.57 N/cm(2)+/-0.19) was significantly higher compared to LOF saddles (walk 0.65 N/cm(2)+/-0.10/ 0.63 N/cm(2)+/-0.11; trot 1.33 N/cm(2)+/-0.22/1.27 N/cm(2)+/-0.20). This study demonstrates that the load under poorly fitting saddles is distributed over a smaller area than under properly fitting saddles, leading to potentially harmful pressures peaks. 相似文献
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M. Masko M. Domino K. Skierbiszewska Ł. Zdrojkowski T. Jasinski Z. Gajewski 《Equine Veterinary Education》2020,32(12):654-663
Complications in late gestation are challenging problems for the equine clinician and are causes of considerable distress to owners. Health problems in a pregnant mare in each stage of gestation can adversely affect the pregnancy. It is important to obtain a thorough history and perform a detailed and systematic examination of the pregnant mare so that the mare may be classified as normal or high-risk. However, even after a thorough examination, practitioners may face problems with the interpretation and assessment of risk. Normal mares should foal in the stable or pasture. Mares classified as having a high-risk pregnancy need to be monitored precisely for signs of oncoming foaling with attendance of trained personnel when labour begins. A valuable method for monitoring of the high-risk mare is assessing fetoplacental well-being. Fetoplacental well-being is most accurately assessed with ultrasonography as well as several available hormone profiles. We are proposing our scoring system of the mare's health, which may be useful in the assessment of risk during pregnancy and help clinicians to decide whether sending the mare to the clinic is reasonable or unnecessary. 相似文献
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为了找出支配鸡胆囊交感节后神经元的分布规律,选用体重1.5 kg～2.5 kg的成年母鸡6只,将CT-HRP溶液注入胆囊壁,动物存活3 d～4 d后,经左心室灌流固定,取内脏神经节、肾上腺神经节以及双侧胸、腰和荐段交感干神经节,制成50 μm的连续冰冻切片,TMB法呈色反应,置明视野显微镜下观片统计.结果发现,支配鸡胆囊的交感传出神经元胞体位于内脏神经节(占41.1%)、肾上腺神经节(占40.5%)和T2～T7交感干神经节(占18.4%),在交感干神经节中标记细胞的峰值位于T5、T6交感干神经节.所有的标记细胞以位于右侧的占优势. 相似文献
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Webbon P 《Equine veterinary journal》2012,44(1):8-12
The understanding and application of genetics have grown extremely quickly since it has become possible to sequence the whole genome of an organism. The human genome sequence was completed in 2001 and that of the horse in 2007. The significance of this is that it makes it more feasible to explain how both genetically simple and complex traits are transmitted from one generation to the next and, therefore, to make informed breeding decisions, modify how horses are managed and trained to minimise the risk of disease and injury, and improve methods of prevention, diagnosis and treatment of many conditions. The science of genetics/genomics will continue to grow internationally, limited only by the funds available. The application of the science to man, horses and other species raises very complex moral and commercial issues. Thoroughbred breeders are perceived by some as resistant to change, but their apparent intransigence is often based on a genuine concern for the integrity of the breed. By taking control of the application of the advances in genetics, the Thoroughbred industry potentially has the opportunity to improve both the health and performance of Thoroughbreds. If, however, the science is applied in an uncoordinated manner, driven by commercial interests with no underlying concern for the horses themselves, there is a very real risk that breeders, the Thoroughbred breed and individual horses will all suffer as a consequence. 相似文献
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试验选择陕北白绒山羊繁育中心羊场的成年健康母羊（怀孕前期）16只,育成母羊13只,育成公羊13只,空腹称重。测定每只羊1d的采食量,计算其摄入的营养成分含量,并与原苏联绒用山羊饲养标准比较,进行饲养水平评价。结果显示,与饲养标准比较,陕北白绒山羊繁育中心羊场的育成母羊代谢能高2．68MJ,粗蛋白低59．29g,钙低3．00g,磷低1．52g;育成公羊代谢能高3．47MJ,粗蛋白低81．92g,钙低4．42g,磷低2．62g;成年母羊代谢能高2．51MJ,粗蛋白低91．33g,钙低3．09g,磷低1．93g。结合羊的体况综合评价饲养水平基本合理,但尚需要按饲养标准增加粗蛋白、钙、磷等营养物质的供给量。 相似文献
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Evidence for the non-involvement of the uterus in the lifespan of the corpus luteum in the cyclic dog 总被引：1，自引：0，他引：1
Progesterone levels in peripheral blood of dogs were analysed during the cycle in which hysterectomy (n = 5) or sham surgery (n = 3) was performed as well as during the cycle of dogs (n = 5) hysterectomized at least one year prior to this study; the data were compared with the findings in control dogs (n = 3). The averages of the duration of the luteal period observed in the three experimental groups were not significantly different from those of control dogs. Immediately after surgery, the progesterone level decreased from 25 to 50% of the presurgical level, but returned to presurgical level in about four days. Prolactin levels were elevated for about 30 h after surgery. Nevertheless, the averages of the mean prolactin levels for each animal during the luteal period of the experimental groups were not significantly different from those of control dogs. It is concluded that in the dog, the uterus is not involved in the lifespan of the cyclic corpus luteum. 相似文献
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犊牛腹泻与肠道菌群的变化 总被引：1，自引：0，他引：1
本文检测腹泻犊牛的直肠内8种主要正常菌群的变化,并与健康犊牛进行对比。结果发现,犊牛腹泻时,大肠杆菌、双岐杆菌和乳杆菌变化较大,而其它菌群变化较小。腹泻或将腹泻时,大肠杆菌数增加,双岐杆菌和乳杆菌数下降。腹泻康复或即将康复时,大肠杆菌减少,双岐杆菌、乳杆菌数增加。 相似文献
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