蚕豆复合氨基酸饲喂肉鸡试验

蛋白质资源的不足,直接影响畜禽饲养业的发展,因此开发蛋白质饲料资源,提高蛋白质利用率是极为重要的。饲料蛋白质的营养价值主要取决于氨基酸的组成。在畜禽饲料中添加一些氨基酸有助于饲料中氨基酸的平衡,从而提高饲料中蛋白质的利用率.蚕豆中提取的复合氨基酸,具有较高的营     

鲤鱼复合氨基酸预混剂饲喂效果的试验研究

鲤鱼复合氨基酸预混剂饲喂效果的试验研究山东省枣庄市水产局宋进美化工部饲料添加剂技术开发服务中心任培桃，王玉华枣庄市淡水养殖试验场龙广怀，张玉荣，马洪法，吕彬在水库网箱投饵养鱼中，配合饲料占全部养鱼投资的６０％左右。为了提高配合饲料的养鱼效果，山东省枣...     

复合氨基酸预混剂的研制及饲喂鲤鱼罗非鱼试验

我国利用蛋白质资源进行氨基酸工业化生产，已成为发展氨基酸工业的重要途径，如用血粉、蚕蛹粉等动物蛋白制取氨基酸，用豆饼、棉籽饼等植物蛋白制取氨基酸等，其目的都是想得到物美价廉的氨基酸营养物质。1988─1994年，我们完成了枣庄市科委下达的“复合氨基酸预混剂的研究与应用”小试科研项目，对工业下脚料毛、发、蹄、角等进行加工处理，使一些富含蛋白质而动物难以直接吸收利用的蛋白质原料，变为容易吸收利用的营养价值较高的复合氨基酸，进而加工成复合氨基酸预混剂，经饲喂试验证明对畜禽鱼类具有明显的促生长作用。为了使复合氨…     

复合氨基酸饲喂蛋鸡试验

利用复合氨基酸饲喂蛋鸡，是当前广开蛋白同料资源，降低生产成本，提高养鸡经济效益的有效途径，我们于1995年5月27日至8月28日在潮泉镇百福图综合养殖场进行了试验并取得了较好的效果。1材料与方法1．1试验鸡分组：选百福图综合养殖场自孵．196日龄罗曼商品代蛋鸡36O只，分为五组每组设两个重复，第1、2、3、4组为试验组，复合氨基酸添加量分别为O．7％、1．7％、2．7％、和3．7％一第5组为对照组。1．2试验用复合氨基酸是畜禽的毛蹄等角质蛋白水解而成，由肥城市龙山化工厂生产，含蛋白47．8％，含18种畜禽所需氨基酸464％。1．3口粮配…     

复合氨基酸饲喂鹌鹑试验

为开发利用饲料资源,缓解蛋白质饲料源的紧缺状况,台州地区再生资源研究所利用羽毛、毛发、蹄角等废弃资源经水解处理生产出能被动物消化吸收的复合氨基酸(AA).该产品喂猪有较好的效果已见较多报道,但饲喂鹌鹑、鸡、鸭等禽类的情况报道不多.为了掌握复合AA饲喂禽类的效果和配合比例等情况,我们选用了试验时间短就可见效的五禽之一的鹌鹑作为试验动物,试验情况如下.     

蚕蛹复合氨基酸饲喂肉鸡试验(第三报)

蛋白质资源不足直接影响饲养业的发展。因此,开发蛋白质饲料资源,提高蛋白质利用率是极为重要的。从动植物等原料中(包括废弃物)提取的复合氨基酸具有较高的营养价值。作者在前二次试验中采用蚕豆,蚕蛹复合氨基酸饲喂肉用仔鸡提高增重4.1％～6.8％,饲料消耗下降5.3％～8.8％。本次试验用蚕蛹复合氨基酸添加在不同蛋白质来源的日粮中进行饲喂肉鸡试验,现将试验情况报告如下。一.材料与方法 (一)试验时间与地点:试验期1991·4·15～1991·6·9,共计56天,在上海市农校实验牧场进行。     

氨基酸微量元素螯合物添加剂饲喂肉鸡试验

<正> 作为饲料添加剂,氨基酸微量元素螯合物与目前广泛使用的硫酸盐微量元素相比,前者用于猪可提高增重7%～29%,饲料消耗下降7%～40%;用于蛋鸡可提高产蛋率6%～20%,饲料消耗下降3%～7%;用于肉鸡,在不多的报导中认为,可提高增重5%以上(差异显著或极显著),饲料转化率提高10%以上。据认为,增重快、耗料低的主要原因在于氨基酸微量元素     

饲用复合蛋白粉饲喂肉鸡试验

饲用复合蛋白粉饲喂肉鸡试验房世印（河南省驻马店市张庄鸡场４６３０００）吉昌公司以螺旋霉素菌渣为主要原料研制的饲用复合蛋白粉，经省农科院科学实验中心检测，富含粗蛋白、微量元素和常量元素，是一种经济的蛋白饲料。我场受公司委托，于９３年４月１４日至９３年６...     

复合氨基酸饲料营养源饲喂畜禽试验

一、复合氨基酸饲料营养源的特征和功能复合氨基酸饲料营养源(以下简称CO—AA),是浙江省桐乡县饲料添加剂厂为开发蛋白资源,解决动物蛋白不足,将不能食用的动物蛋白原料——人畜的毛发,经过水解转变成可以被动物利用的复合型多种氨基酸,于1984年试制成本产品,并已列入省市     

微量元素氨基酸络合物在预混合饲料中理化性质的研究

以无机矿物盐为对照,通过贮藏试验,研究了不同贮藏条件下微量元素氨基酸络合物在预混合饲料中的理化性质,结果表明,微量元素氨基酸络合物在预混合饲料中具有较好的稳定性,对VA、VC的破坏作用明显小于无机矿物盐。     

不同添加剂预混料配方对肉仔鸡生产性能的影响

添加剂预混料是配合饲料生产的核心和关键,其质量好坏直接影响配合饲料产品质量、动物生产性能以及动物产品的质量。笔者曾通过试验筛选出了添加剂的理想组合,本试验旨在通过对肉仔鸡生产性能的观察,探讨添加剂预混料的最佳配方,为实际生产中的广泛应用提供理论依据。1 试验材料与方法1.1 试验动物与分组 选用1日龄商品代艾维茵混合健雏360只,采用完全随机单因子设计分成4组进行试验。每组设3个重复,每重复30只（开始体重组间差异不显著,p>0.05）。试验期49d。     

肉仔鸡日粮中添加酵母微量元素预混料饲喂效果试验

本试验于2000年3月18日至4月28日在本市某肉仔鸡饲养场进行,旨在探讨酵母微量元素预混料对肉仔鸡的饲喂效果. 1材料与方法 1.1试验材料酵母微量元素预混料(内含酵母锰、酵母铁、酵母铜及酵母硒等)、8%黄霉素和15%金霉素,均为市售合格产品.     

以可利用氨基酸配制肉鸡饲粮研究

降低畜牧业生产对环境所造成的负面影响,最有效的技术在于降低氮摄入量和保持氨基酸的平衡供给以满足动物的需要.因此,以可利用氨基酸指标按理想蛋白质模式给畜禽配合日粮,可以更准确地满足需要,提高蛋白质的转化效率,节省蛋白质饲料资源,减少粪氮的排出.为此,我们进行了以可利用氨基酸配制肉鸡饲粮的研究.     

Optimal in‐feed amino acid ratio for broiler breeder hens based on deletion studies

An ideal amino acid ratio (IAAR) for breeder hens is needed for maximum nitrogen retention (NR) taking into account nitrogen deposition in body (ND_B), feathers (ND_F) and egg mass (NEM) to improve dietary protein efficiency. Thus, the aim of this study was to apply the deletion method to derive the IAAR for broiler breeder hens. The nitrogen balance trials were performed from 31 to 35 weeks and from 46 to 50 weeks. Twelve treatments with eight replicates and one hen per cage were used. A balanced diet (BD) was formulated to meet the requirement of all nutrients. The other diets were formulated diluting 55% of BD with corn starch and refilled with amino acids (AAs) and other ingredients, except the AA tested. Each trial lasted 25 days. Feather losses, egg production and egg weight were recorded daily, and the samples were stored to further determine NEM and nitrogen in feather losses (ND_FL). At the start and the end of each period, a group of birds were slaughtered to further determine ND_B and ND_F. The NR was calculated as the sum of ND_B, ND_F, ND_FL, NEM and the nitrogen maintenance requirement (NMR). The deletion of valine greatly depressed the NR in peak production (31 to 35 weeks) while the deletion of the isoleucine greatly depressed the NR of the hens from 46 to 50 weeks of age. The percentual reduction in NR and the per cent of the AA to delete from the BD were used to calculate the AA requirement. The average IAAR was Lys 100, Met+Cys 86, Trp 23, Thr 80, Arg 113, Val 90, Ile 91, Leu 133, Phe+Tyr 108, Gly+Ser 94 and His 35. The IAAR was in line with the recommendation from the literature, validating deletion method with the advantages from a rapid and low‐cost procedure.     

Influence of age on the apparent ileal amino acid digestibility of feed ingredients for broiler chickens

The apparent ileal digestibility of amino acids in 8 feed ingredients was determined using 14-, 28- and 42-d-old male broiler chickens. The ingredients included three cereals (wheat, sorghum and maize), one cereal by-product (mill run), three oilseed meals (canola, cottonseed and soybean meals) and one animal protein meal (meat and bone meal). Dietary crude protein in the assay diets was supplied solely by the test ingredient. All diets contained 20 g/kg acid-insoluble ash as an indigestible marker, and each diet was offered ad libitum in mash form to 5 replicate pens from 11 to 14 d, 25 to 28 d and 39 to 42 d post-hatching. There were 12, 6 and 6 birds per pen for the 14, 28 and 42 d samplings, respectively. The results suggest that the age of broilers significantly influenced the apparent ileal digestibility of amino acids. The effects, however, varied among amino acids and ingredients. In wheat, the digestibility of most amino acids was higher in 14- than in 28- and 42-d-old broilers. In maize, the digestibility coefficients of amino acids were higher at 28 and 42 d than at 14 d. The digestibility coefficients in maize and wheat at 28 and 42 d were similar. The digestibility of amino acids in sorghum at 42 d was higher than those at 28 d, but similar to those at 14 d except for histidine, lysine, serine and glycine, which were significantly higher at 42 d. Digestibility of amino acids in sorghum was similar between 14 and 28 d except for isoleucine, leucine, phenylalanine, glutamic acid and alanine. The digestibility of amino acids in mill run at 42 d was significantly higher than those at 14 and 28 d. There were no differences in digestibility between 14 and 28 d. In general, the digestibility of amino acids in canola meal, soybean meal and, meat and bone meal was higher at 28 and 42 d compared to those at 14 d, and similar between 28 and 42 d of age. In cottonseed meal, age had no effect on the digestibility coefficient of amino acids, except for lysine and arginine, which increased with age. Analysis of the combined results for the 8 feed ingredients showed that, in general, the digestibility coefficients of amino acids increased with advancing age of broiler chickens.     

蚕沙饲喂肉鸡的试验研究

安徽省的皖南山区和大别山区有着悠久的养蚕历史，每年饲养量在５０万张以上，约产干蚕沙７５００万kg，除了少数养殖专业户用来喂猪外，多数仍作一般肥料使用。蚕沙是蚕吃剩下的残桑叶和其排泄物的统称，是一种具有潜在开发价值的重要饲料资源，蚕沙富含蛋白质、脂肪、糖、矿物质、微生素、叶绿素和未知促生长因子，营养价值与麦麸相当。为了大力开发饲料资源，研究蚕沙在养鸡业上的理论和实用效果，为养鸡专业户利用蚕沙提供科学的理论依据。笔者于２００２年８月２５日至１０月５日在巢湖市红星养鸡场进行了蚕沙代替部分饲料饲喂肉仔鸡的…     

Effect of amino acid deficiency on precaecal amino acid digestibility in broiler chickens

In this study, we determined whether deficient dietary amino acid (AA) concentrations influence the precaecal (pc) AA digestibility when determined using the regression approach. We mixed two basal diets. Basal diet 1 was deficient in essential AAs, whereas adequate AA concentrations were ensured in basal diet 2 by adding free AAs. Rapeseed cake and full‐fat soya beans as test ingredients were included in the basal diets at levels of 100 and 200, and 150 and 300 g/kg, respectively, at the expense of maize starch. Each diet was tested with six replicates of 10 broiler chickens each. The feed intake of the chickens that were fed diets based on basal diet 2 was similar, whereas the feed intake of the chickens that were fed diets based on basal diet 1 differed considerably. The numerical differences in pc AA digestibility determined with basal diet 1 or 2 ranged from 2.6 percentage points to 20.8 percentage points in rapeseed cake and from 0.5 percentage points to 15.2 percentage points in soya beans. Across all measured AAs, the average differences were 10.1 percentage points and 5.4 percentage points in rapeseed cake and soya beans, respectively. The differences in the estimated pc AA digestibility between the basal diets were probably caused by different basal endogenous AA losses in the digesta between treatments as a consequence of different feed intake. Adequate AA concentrations and test ingredient levels that are specifically adjusted to avoid a negative effect on feed intake are recommended for future studies.