共查询到20条相似文献，搜索用时 430 毫秒
1.
本试验旨在研究碳酸氢钠对蛋鸡饲粮干物质、总能、钙和磷代谢率的影响。选用10周龄京红褐壳蛋鸡100只为试验动物,按体重相近的原则随机分4组,每组5个重复,每个重复5只。试验日粮在基础日粮基础上分别添加0.1%、0.2%和0.3%的NaHCO3等质量替代基础料配方中的食盐(Ⅰ、Ⅱ和Ⅲ组)。试验结果表明:添加碳酸氢钠后,能提高育成鸡饲粮干物质利用率和总能表观代谢率,其中添加量为0.3%的试验组饲粮总能表观代谢率极显著地高于其它各组(0.01);碳酸氢钠对饲粮干物质利用率无明显影响;对照组的钙、磷存留率均极显著地低于其它各试验组(0.01);蛋鸡饲粮中的碳酸氢钠添加量以0.1%~0.2%为宜。 相似文献
2.
本试验旨在研究不同硒源对济宁百日鸡生产性能、鸡只健康状况、蛋中硒含量的影响,共设计2个试验。试验Ⅰ：25周龄济宁百日鸡200只随机分为4个组,每组5个重复,每个重复10只,对照组只饲喂基础日粮,3个试验组分别在基础日粮中添加亚硒酸钠、酵母硒与蛋氨酸硒三种不同含硒添加剂,硒源添加水平以饲料中硒元素0.4 mg/kg计算;预饲期为7 d,正式饲养试验持续56 d。试验Ⅱ：35周龄济宁百日鸡200只随机分为4个组,每组5个重复,每个重复10只,对照组只饲喂基础日粮,3个试验组分别在基础日粮中添加含0.4、0.6、0.8 mg/kg硒水平的蛋氨酸硒。预饲期为7 d,正式饲养试验持续28 d。试验结果表明：在本试验条件下,添加有机硒源组生产性能略高于无机硒源组和对照组,但各组间无显著差异（P>0.05）;饲料中添加有机硒源,比无机硒源更能促进济宁百日鸡鸡蛋中硒的沉积,且有机硒源中,蛋氨酸硒比酵母硒在鸡蛋富硒过程中转化效率更高;不同浓度的蛋氨酸硒均可显著提高济宁百日鸡鸡蛋中的硒含量（P<0.05）,综合比较以蛋氨酸硒在基础日粮中的硒水平浓度为0.6 mg/kg最适宜。 相似文献
3.
《国外畜牧学(猪与禽)》2021,41(3)
为研究日粮中添加中药-益生菌制剂对海兰褐蛋鸡生产性能的影响,选择由甘肃华宝农牧科技有限公司种鸡场提供的健康、发育良好的185日龄海兰褐蛋鸡800羽,试验鸡随机分为4组,每组2个重复,每个重复100羽。Ⅰ组为对照组,仅饲喂基础日粮;Ⅱ组为复方中药组,在饲喂基础日粮的基础上添加0.5%复方中药制剂;Ⅲ组为益生菌制剂组,在饲喂基础日粮的基础上添加0.3%益生菌制剂;Ⅳ组为中药-益生菌制剂组,在饲喂基础日粮的基础上添加0.3%中药-益生菌复合制剂。统计各组蛋鸡的产蛋率、死淘率、软破壳蛋率和料蛋比。结果表明,在日粮中添加中药-益生菌制剂可适当提高蛋鸡产蛋率,有效降低死淘率、软破壳蛋率和料蛋比。 相似文献
4.
试验旨在研究中草药添加剂(黄芪粉、刺五加粉和松针粉复合制剂)对林下鸡生长性能、肉质理化特性和血液生化指标的影响。试验选取300只90日龄体质量相近健康无病的芦花鸡,随机分为3组,每组5个重复,每重复20只鸡。同时选取200只黑土鸡随机分成2组,每组5个重复,每重复20只鸡。对照组饲喂基础饲粮,试验各组分别在基础饲粮中添加1.0%+0.5%+0.5%、2.0%+1.0%+1.0%、1.0%+0.5%+0.5%及2.0%+1.0%+1.0%的黄芪粉、刺五加粉和松针粉复合制剂。试验共计61 d,预饲期5 d,正试期56 d。结果表明:饲粮中添加中草药制剂可以提高林下鸡的平均体质量和日增质量,其中试验二组效果最佳;饲粮中添加中草药制剂可以改善林下鸡的肉质理化特性,提高肉质性状;添加中草药制剂可以提高林下鸡血液中总蛋白的含量,降低胆固醇及三酰甘油的含量和谷草转氨酶及谷丙转氨酶活性。由此可见,饲粮中添加中草药制剂可以促进肉鸡的生长性能,改善肉鸡肉质性状和血液生化指标。 相似文献
5.
6.
“甜叶菊提取物”对肉仔鸡生长和屠宰性能的影响 总被引：1，自引：0，他引：1
试验选用肉仔鸡120只,随机分成4组,每组30只。Ⅰ、Ⅱ和Ⅲ组分别在基础日粮中添加0.2%、0.3%和0.4%"甜叶菊提取物",Ⅳ组为对照组,饲喂基础日粮,饲养期为8周。研究该物质对肉鸡生产和屠宰性能的影响。结果表明,与对照组(Ⅳ组)相比,Ⅰ、Ⅱ和Ⅲ组日增重分别提高了17.4%、20.2%和9.3%。其中Ⅱ组增重与Ⅳ组的差异达到了显著水平(P<0.05);饲料利用率Ⅰ、Ⅱ和Ⅲ组分别比对照组提高了5.1%、6.27%和0.39%。与对照组相比,鸡屠宰性能没有明显的差异(p>0.05);从以上结果可以看出,在肉鸡日粮中添加0.3%"甜叶菊提取物"可明显改善生产性能,但是对鸡的屠宰性能并没有显著的影响。 相似文献
7.
为了探讨桂皮型中草药添加剂(桂皮、小茴香、陈皮等)对贵妃鸡生长性能及内脏器官发育的影响,选用21日龄的贵妃鸡180只,随机分成四个组,每组45只.对照组(A组)饲喂基础日粮,试验组饲喂在基础日粮内添加0.5%、1%、2%(分别为B、C、D组)桂皮型中草药的日粮.试验期70d(21～90日龄).并在试验结束时每组随机抽取24只鸡(12公、12母)进行屠宰试验,测定其心脏重、肝脏重、脾脏重并计算其器官指数.结果表明:在21～90日龄贵妃鸡日粮中添加0.5%、1%、2%的桂皮型中草药不影响其日增重和饲料利用率(P>0.05).对贵妃鸡肝脏、心脏、脾脏重量及其器官指数均无明显影响(P>0.05),但添加不同比例的中草药有改善以上指标的趋势,以添加0.5%最佳.因此,贵妃鸡日粮中桂皮型中草药添加剂的适宜添加量为0.5%. 相似文献
8.
为了研究饲用复合酶制剂FE909对小尾寒羊日增重的影响,选20kg左右小尾寒羊75只,随机分成3组,每组25只,包括1个对照组和2个试验组,各组采用相同的饲养方式,饲喂相同的基础日粮,在3组小尾寒羊的基础日粮中分别添加0g/只、0.3g/只、6g/只的饲用复合酶制剂FE909。结果表明,试验2组平均日增重为179.7g,比对照组和试验1组分别提高14.24%和7.41%,差异显著(P<0.05);试验2组经济效益为78.66元/只,比对照组和试验1组均提高5.05%。由此可见,小尾寒羊日粮中额外添加6g/只复合酶制剂FE909时,日增重和经济效益最高。 相似文献
9.
中药添加剂对海南文昌鸡免疫功能的影响 总被引：1，自引：0，他引：1
将180只雌性文昌鸡随机分为5组,每组3个重复,每重复12只。第1组为空白对照组,饲喂基础日粮;第2组为抗生素对照组,在基础日粮中按600 mg/kg添加金霉素;第3、4、5组分别在基础日粮中添加0.1%、0.2%和0.3%的中药添加剂。试验共进行6 w,每周称重,计量采食量。分别于28、35d时接种禽流感疫苗。第49 d、56 d时每组随机取8只鸡,翅静脉采血制备血清,血凝抑制试验检测禽流感疫苗抗体滴度。56 d时将各组已采血8只鸡屠宰后打开腹腔,取胸腺、法氏囊称重并计算免疫器官指数。结果表明,0.2%中药添加剂能显著提高文昌鸡日增重(P<0.05),提高法氏囊指数(P<0.05);0.2%和0.3%中药添加剂均能提高禽流感疫苗抗体滴度(P<0.05)。结果提示,本中药添加剂能够提高海南文昌鸡生产性能和免疫功能。 相似文献
10.
益康xp酵母培养物对蛋鸡产蛋性能的影响 总被引：3，自引：0，他引：3
选用产蛋280d的罗曼蛋鸡573只，随机等分为Ⅰ，Ⅱ，Ⅲ组，其中Ⅰ，Ⅱ组为试验组，Ⅲ组为对照组，试验分两个阶段进行，每阶段历时6周，第一阶段在Ⅰ，Ⅱ组基础日粮中分别添加xp酵母培养物0.15%和0．25％，第二阶段分别添加0.3%和0.5%，两个阶段对照鸡均饲喂原基础日粮，结果表明，添加0.3%可使蛋鸡生产性能提高，且差异显著（P＜0．05）。 相似文献
11.
12.
T. C. Carter 《British poultry science》1968,9(3):265-271
One hundred eggs were used, from hens of seven widely differing strains: two commercial brown‐egg hybrids (one British, one American), two commercial white‐egg hybrids (one British, one Canadian), one broiler strain, one highly inbred strain of laboratory White Leghorns and one laboratory strain of Brown Leghorns. The volume occupied by the shell of each egg was estimated from its surface area—itself estimated by means of a three‐parameter model (Carter, 1968)— and its mean thickness, measured with an anvil micrometer. The volume occupied by the egg contents was estimated by subtracting the shell volume from the egg volume, which was also estimated by means of the three‐parameter model. Mean overall shell density (counting as “shell” all mineral matter and spaces between the outer surface of the mineral shell and a surface through the tips of the mammillae) was estimated, by regressing shell weight on shell volume, to be 2.241 ±0.004 g./cm.3; covariance analysis showed that the strains were homogeneous in this respect. Mean incremental shell density (i.e. the density of shell distal to the mammillary region) was estimated, by regressing shell weight per unit surface area on shell thickness, to be 2.386±0.004 g./cm.3; the strains were homogeneous in this respect too. The mean depth of the intermammillary spaces was estimated to be 19.9 μ. All the residual deviation from the common regression line can be attributed to measurement error. The estimated density of incremental shell is lower than that of calcite; the packing fraction of the crystals in the shell aggregate and/or the atoms in the crystals was estimated to be 92.8 per cent. The density of the egg contents (at the temperature of the bird) was estimated by regressing weight of contents on volume of contents; covariance analysis revealed significant differences between strains, one of the brown‐egg hybrids having the highest density of egg contents, 1.045 g/cm.3, and the laboratory Brown Leghorns the lowest, 1.033; both commercial white‐egg hybrid strains gave a value of 1.040 g./cm.3. 相似文献
13.
14.
A method is described for the estimation of mean egg weight from data giving the proportions of eggs in different weight grades. Tables are presented in which mean egg weights have been calculated for a range of grading figures, using both the British Egg Marketing Board and the European Economic Community grading systems. 相似文献
15.
《国外畜牧学(猪与禽)》2012,32(5)
PROAN公司是一家综合型现代化禽蛋生产商和动物蛋白食品供应公司.
Prote í na动物有限公司(Prote i na Animal SA de CV)饲养了2 520万羽蛋鸡,是全球第二大、墨西哥和拉丁美洲第一大禽蛋生产商.该公司以首写字母缩写PROAN或“San Juan”蛋而被人们熟知.“San Juan”蛋以公司总部所在地圣胡安-德洛斯拉戈斯(San Juan de los Lagos)的名称命名,它地处墨西哥哈利斯科州(State of Jalisco)的洛斯阿尔托斯地区(Los Altos). 相似文献
16.
Mycoplasma gallisepticum vaccination: effects on egg transmission and egg production 总被引：1，自引：0，他引：1
The effects of Mycoplasma gallisepticum (MG) vaccination on egg transmission of MG and egg production were evaluated. Leghorn hens vaccinated with live MG (strain F), with strain F plus MG bacterin, with one dose of MG bacterin, or with two doses of MG bacterin all transmitted MG through the egg at a significantly lower level than unvaccinated controls. Hens vaccinated with two doses of MG bacterin had the longest lag before detectable transmission of MG through the egg. All vaccinated groups were protected against the egg-production drop seen in unvaccinated hens challenged with virulent MG. 相似文献
17.
T. C. Carter 《British poultry science》1977,18(3):309-313
1. More than 9000 eggs, each laid by a known hen, were examined and malformations of six types recorded: double‐yolked, A, B, rough, shell‐less and thin‐shelled.
2. A and B malformations are those seen in, respectively, an egg that is held in the shell gland for an abnormally long period and one that reaches the shell gland while an A‐egg is still there; many of the eggs recorded as rough‐shelled were probably A‐eggs for which the corresponding B‐eggs had been lost.
3. The birds were of three strains: a medium‐body‐weight brown‐egg‐laying strain and a White Leghorn strain, both of commercial origin, and a laboratory strain of Brown Leghorns.
4. The incidences of egg malformation in the three strains were 8.3, 9.2 and 0.5%.
5. A‐, B‐ and rough‐shelled eggs constituted more than two‐thirds of all malformed eggs.
6. Evidence from two generations suggests that these malformations have a high heritability. 相似文献
18.
1. Egg shell cracks and body checking were assessed on a total of 25 776 eggs collected from 744 hens of two selected White Leghorn strains between 65 and 72 weeks of age.
2. The sire‐component heritabilities in the two strains, respectively, were 0–59 ± 0.23 and 0.36 ± 0.20 for total cracks and 0.41 ± 0.20 and 0.49 ± 0.22 for body checking. The heritabilities for hole, star and hair cracks ranged from ‐0.03 ± 0.13 to 0.66 ± 0.24.
3. The frequency of total cracks did not bear any significant antagonistic relationship with body checking, egg number and egg weight. Body checking had variable relationship with egg number and egg weight. The correlations of shell cracks and body checking with each other and with egg number and egg weight appeared to vary between the strains. 相似文献
19.
20.
本试验旨在研究芽孢杆菌制剂对"京粉一号"蛋鸡蛋品质及蛋营养成分的影响。选择健康、产蛋均匀的259日龄的"京粉一号"蛋鸡3 600只,随机分为2组,每组6个重复,每个重复300只鸡。对照组饲喂基础日粮,试验组在基础日粮中添加3%的芽孢杆菌制剂,进行为期40 d的试验。结果表明:与对照组相比,试验组蛋壳硬度、哈夫单位以及蛋黄颜色均有不同程度地提高(P>0.05);在反映蛋的物理指标上,试验组蛋黄重和蛋黄相对重显著高于对照组(P<0.05),蛋清相对重显著低于对照组(P<0.05),蛋黄蛋白比有升高的趋势(P>0.05);同时,试验组蛋黄中脂肪和水分含量显著降低(P<0.05),蛋白含量显著升高(P<0.05)。试验表明:在蛋鸡日粮中添加芽孢杆菌制剂,对蛋品质具有一定的改善作用;可显著提高蛋黄重、蛋黄相对重,降低蛋清相对重。同时,可减少蛋黄中脂肪和水分含量,增加蛋白的含量。 相似文献