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分4批从孵出的海波罗鸡雏中选出888只公母混合雏,每批222只,研究几内亚热带气候对海波罗肉仔鸡生长期耗料量的影响.结果表明,4批鸡的整个试验中的累计耗料量分别为4 745.58 g/只、4 507.44 g/只、4 682.73 g/只和4 545.77 g/只.第Ⅱ、Ⅲ和Ⅳ批鸡的累计耗料量比第Ⅰ批鸡分别少5.28%、1.13%和4.40%,第Ⅱ和第Ⅳ批累计耗料量比第Ⅲ批分别少4.11%和3.23%,第Ⅱ批累计耗料量比第Ⅳ批的少0.5%,比第Ⅰ、Ⅲ和Ⅳ批偏少.4批鸡4周龄料肉比分别为1.23、2.03、1.90和1.67,饲料报酬都高,7周龄分别为3.78、2.97、2.56和2.52,除第Ⅰ批外,各批7周龄饲料报酬较高.在整个试验期,4批鸡1～7周龄的平均累计耗料量为4 622.88 g/只,其平均累计料肉比为2.28 g,累计耗料量比海波罗的标准少217.12 g,即4.70%.由于几内亚热带气候影响,本试验鸡采食量少,料肉比较低. 相似文献
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莫里·桑卡雷 《广东畜牧兽医科技》2001,26(2):24-26
选用同日出壳公母健雏各222只，在相同饲养管理条件下，对海波罗肉鸡早期生长发育等有关指标进行观测，结果表明，公鸡早期生长速度较母鸡快，平均日增重比母鸡高4．53g，公母鸡7周龄体重分别为2197．06g和1976．47g；累计耗料量公鸡比母鸡多16．33g；公母鸡料肉比分别为2．10和2．33；经7周龄饲养公母鸡成活率均达92％，抗逆性强，是值得推广的优质鸡种。 相似文献
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研究复方中草药添加剂对大骨鸡生长性能的影响,选用1日龄大骨鸡200只,随机分为4组,每组50只,Ⅰ组为空白对照组,Ⅱ、Ⅲ、Ⅳ组基础日粮中分别添加0.5%、1%、2%复方中草药添加剂,试验期42 d。在不同试验阶段称量体重和耗料,计算平均日增重、耗料量及料重比。结果表明,在日粮中添加不同比例的复方中草药添加剂对其生长性能有提高趋势,添加量以1%为最佳。 相似文献
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试验设计4个处理3个重复,开展不同施肥处理的杂交狼尾草打浆后饲喂育肥猪效果研究。4个处理为：处理Ⅰ（CK）只饲喂肥育猪的基础日粮,处理Ⅱ为基础日粮＋浇灌沼液的牧草浆0.25kg/头.d,处理Ⅲ为基础日粮＋浇灌沼液的牧草浆0.5kg/头.d,处理Ⅳ为基础日粮＋浇灌沼液并加施尿素的牧草浆0.5kg/头.d。结果表明,处理Ⅱ、Ⅲ、Ⅳ平均日增重分别比处理Ⅰ提高了22.4g,40.4g和48.4g,料肉比分别比处理Ⅰ降低了4.62%、3.96%和7.26%,每头猪效益分别比处理Ⅰ提高了26.0元、34.3元和44.6元,猪肉氨基酸含量也比处理Ⅰ有不同程度的提高,尤其以添加增施尿素的牧草浆后,肥育猪的日增重、料肉比和经济效益都最好。 相似文献
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不同施肥处理的杂交狼尾草打浆后饲喂育肥猪效果研究 总被引：6，自引：1，他引：5
试验设计4个处理3个重复,开展不同施肥处理的杂交狼尾草打浆后饲喂育肥猪效果研究.4个处理为:处理Ⅰ(CK)只饲喂肥育猪的基础日粮,处理Ⅱ为基础日粮+浇灌沼液的牧草浆0.25kg/头.d,处理Ⅲ为基础日粮+浇灌沼液的牧草浆0.5kg/头.d,处理Ⅳ为基础日粮+浇灌沼液并加施尿素的牧草浆0.5kg/头.d.结果表明,处理Ⅱ、Ⅲ、Ⅳ平均日增重分别比处理Ⅰ提高了22.4g,40.4g和48.4g,料肉比分别比处理Ⅰ降低了4.62%、3.96%和7.26%,每头猪效益分别比处理Ⅰ提高了26.0元、34.3元和44.6元,猪肉氨基酸含量也比处理Ⅰ有不同程度的提高,尤其以添加增施尿素的牧草浆后,肥育猪的日增重、料肉比和经济效益都最好. 相似文献
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日粮能量水平对文昌鸡生产性能的影响 总被引：2，自引：1，他引：1
选择刚出雏健康文昌鸡900只(公母各半),随机分为3组:低能组(Ⅰ组),对照组(Ⅱ组)、和高能组(Ⅲ组),每组设5个重复,每个重复30只.试验分为0～2周龄、3～8周龄、9～14周龄3个阶段.试验结果表明:0～2周龄母鸡降低能量水平可以提高日增重和降低料肉比,在Ⅰ组和Ⅲ组间差异显著(P＜0.05),3～14周龄母鸡各组间日增重和料肉比差异不显著(P＞0.05);0～2周龄公鸡提高能量水平可以提高日增重和降低料肉比,且Ⅰ组与Ⅱ、Ⅲ组间差异显著(P＜0.05),3～8周龄公鸡Ⅱ组日增重和料肉比显著优于Ⅰ组和Ⅲ组(P＜0.05),9～14周龄公鸡Ⅰ组日增重和料肉比显著优于Ⅱ组和Ⅲ组(P＜0.05);能量水平对母鸡腿肌率影响显著.推荐文昌鸡0～2周龄代谢能需要量为11.50～12.12MJ/kg;3～8周为11.70MJ/kg;9～14周为10.7～11.87MJ/kg. 相似文献
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复方杜仲对肉仔鸡生长性能及肉品质的影响 总被引：3，自引：0，他引：3
选择1日龄AA肉鸡苗400只,随机分成4组,每组设2个重复。Ⅰ、Ⅱ、Ⅲ、Ⅳ组分别在饮水中加入0g/L(对照)、1.25g/L(低剂量)、2.5g/L(中剂量)、5g/L(高剂量)浓度的复方杜仲水煎液,连续给药6周,测定每周增重及料重比。第6周末每组随机抽样8只屠宰,测定胸肌粗蛋白、粗脂肪、失水率、胸肌含水量、pH值,比较胸肌和腿肌肉色的变化。结果:料重比,1周龄各试验组均低于对照组(P<0.01),6周龄,中、高剂量组低于对照组(P<0.05);周增重2周龄高剂量组和6周龄中、高剂量组高于对照组(P<0.05);胸肌中粗蛋白的含量,中剂量高于对照组(P<0.05),Ⅳ组胸肌、腿肌的a值(红色)显著低于对照组,而L值(亮度)无明显变化;结论:复方杜仲水煎液可提高肉鸡的增重,降低料重比,提高肉品质。 相似文献
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早期数量限饲对肉仔鸡生长性能和胴体特性的影响 总被引：1，自引：0，他引：1
试验研究了早期数量限饲对肉仔鸡生长性能和胴体品质的影响。200只8日龄艾维茵肉仔鸡被随机分成4组,每组五个重复,每重复10只鸡。对照组基础饲粮根据NRC营养水平配制,试验组肉仔鸡从8日龄开始喂料量分别为对照组的90%、80%和70%,限饲1周后各组恢复自由采食。试验结果表明:在第2周,限饲各组肉仔鸡的体重和日增重分别显著低于对照组(P<0.05);在第3周,限饲90%组完成补偿生长,体重与对照组差异不显著(P>0.05);在第4周,限饲80%和70%组完成补偿生长,体重与对照组差异不显著(P>0.05);5、6、7周及2～7周各组在体重、日增重、日采食量和饲料转化率等方面都无显著差异(P>0.05)。早期数量限饲对肉仔鸡胴体特性没有显著影响(P>0.05)。 相似文献
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肉用仔鸡从出生到8周龄出栏这一阶段的饲养管理,是肉鸡养殖业生产的重要环节之一,其目的是要求生长速度快,肉质细嫩、味美,耗料少,成活率高,经济收益大。为此,我们要在其不同日龄阶段应当采取不同的饲养管理措施,搞好肉用仔鸡的饲养。 相似文献
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早期限饲对肉鸡肺动脉高压综合征发病率、生产性能和腹脂率的影响 总被引：1，自引：0，他引：1
采用低温诱发肉鸡肺动脉高压综合征,对比观察不同的早期限饲方法对于常温和低温条件下PHS的发病率、肉鸡生产性能和腹脂率的影响。在试验1中,限饲处理组肉鸡分别于7￣14日龄或7￣21日龄每天给料8h,对照组肉鸡全程自由采食。在试验2中,限饲组肉鸡分别于7￣14日龄给予对照组肉鸡前1d饲料消耗量的60%或80%。结果表明:早期限饲能够降低肉鸡PHS的发病率,在低温条件下尤其明显;早期限饲改善了饲料效率,同时未对肉鸡的胴体品质产生显著的影响,且适当限饲不影响肉鸡的最终上市体重。这表明早期限饲是一种有效的控制肉鸡PHS的方法,值得在实际生产中推广应用。 相似文献
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【目的】本试验旨在研究肉鸡生长前期(1~21日龄)饲喂发酵饲料对其生长性能、养分利用率、肠道健康和肉品质的影响。【方法】选用1日龄爱拔益加肉鸡公鸡240只,随机分入4个处理组,每组6个重复,每个重复10只鸡。4组肉鸡生长前期(1~21日龄)分别饲喂添加0、5%、10%、15%发酵饲料的试验饲粮,生长后期(22~42日龄)均饲喂不含发酵料的基础饲粮,试验期为42 d。试验第21和42天时,测定肉鸡的1~21日龄、22~42日龄和1~42日龄生长性能、19~21日龄和40~42日龄养分利用率、42日龄肠道菌的数量和42日龄肉品质等指标。【结果】与对照组相比,饲喂10%发酵饲料显著降低肉鸡1~21日龄料重比(P＜0.05);饲喂15%发酵饲料显著提高肉鸡1~42日龄平均日增重和平均日采食量(P＜0.05),显著提高19~21日龄肉鸡干物质利用率和能量代谢率(P＜0.05)。前期饲喂发酵饲料对42日龄肉鸡的盲肠菌群数量影响不显著(P＞0.05)。与对照组相比,饲喂发酵饲料显著降低42日龄肉鸡肌肉中胆固醇含量(P＜0.05)。【结论】生长前期饲喂10%的发酵饲料显著降低了肉鸡1~21日龄料重比;饲喂15%发酵饲料显著提高了肉鸡1~42日龄平均日增重、平均日采食量及19~21日龄肉鸡干物质和能量利用率。生长前期饲喂发酵饲料显著降低了42日龄肉鸡肌肉胆固醇含量,但是对42日龄肉鸡盲肠菌群数量无显著影响。 相似文献
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早杂籼稻糙米代替玉米日粮对肉鸡增重效果的研究 总被引：3，自引：0，他引：3
选择１日龄ＡＡ肉雏鸡４４０只,随机分为４组,每组１１０只。１组为玉米日粮组,２,３和４组依次以糙米取代日粮中玉米５０％,７０％和１００％。饲养４５ｄ,结果表明：１,２,３和４组鸡平均体重分别为１．９８０,２．０６７,２．２０６和２．３２５ｋｇ;日增重依次为４２．７,４４．７,４７．８和５０．４ｇ;与１组比较,２,３和４组鸡的日增重依次提高４．７％,１１．９％和１８．０％;料肉比依次下降０．５％,２．９％和７．１％;每千克增重耗料成本依次下降０．０４元,０．１３元和０．３１元。说明,随日粮中糙米代用量的增加,试验鸡增重加快,料肉比和增重成本下降。说明糙米作为肉鸡的能量饲料是可行的、有益的。 相似文献
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《The Journal of Applied Poultry Research》2004,13(4):540-548
Three experiments were conduced to quantify the potential negative effect of fine particles (<0.5 mm diameter) in the feed on fast- and slow-growing broiler growth performance. In the first experiment, chickens were fed mash or pellets of 2.5 and 4 mm diameter between 15 and 35 d of age. During this period, fast-growing broiler fed pelleted feed had a 19% higher final BW, a 12% higher feed intake, and a 12% lower (improved) feed conversion ratio than those fed mash. Feed form had no significant effect on feed intake, BW gain, or final BW of slow-growing chickens. Feed conversion ratio, however, was 6% lower with pellet than mash. In the second and the third experiments, fast and slow-growing chickens weighed 1.2 kg at the beginning of the experiment. In the second experiment, the effects of a transition from pelleted feed to mash or a mixture between the 2 feed forms on the short-term feed intake and growth was investigated. After the transition from pellet to mash or the mixture, both fast- and slow-growing chickens adapted their feed intake in less than 10 min. The mixture between mash and pellets led to a 25% higher feed intake and an 18% lower feed conversion ratio for fast-growing chickens. There was no significant difference between mash and the mixture on slow-growing feed intake, but feed conversion ratio was 9% lower. In the third experiment, the effect of fine particles concentration in the feed on short-term growth response was measured. Increase in the concentration of fine particles in the feed linearly reduced feed intake and BW gain of both fast- and slow-growing chickens. However, the slope was 5 times greater for fast-growing chickens than for slow-growing chickens. These 3 experiments showed that fast-growing chickens are more sensitive to feed form than slow-growing chickens. Therefore, physical form of the feed can be a major limiting factor of performance. 相似文献
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E. Ozturk N. Ocak I. Coskun S. Turhan G. Erener 《Journal of animal physiology and animal nutrition》2010,94(1):78-85
The present study aimed at evaluating the effects of different doses of humic substances (HS) in waterer pan on broiler performances and meat quality. For the trial, 480 chicks (ROSS 308) were allocated into four groups (HS0, HS150, HS300 and HS450) of 120 equally mixed‐sex birds, each receiving a drinking water supplemented with 0, 150, 300 and 450 ppm of a humic acid (provided by 0.0%, 0.5%, 1.0% and 1.5% of HS, v/v) respectively. At the age of 21 and 42 days, feed consumption and live weight were taken. At the age of 42 days, 16 birds per treatment were slaughtered, dressing percentages, digestive tract traits were evaluated and samples of breast (pectoralis major) and thigh (iliotibialis) meat were taken to evaluate the changes in colour characteristics (CIE L*, a* and b*) and chemical composition. The body weight gain increased by the HS300 in relation to the HS0 and HS450, and decreased by the HS450 in relation to the HS0. The feed consumption of birds in the HS450 and feed efficiency of birds in the HS300 were lower and higher than those in the other treatments respectively. The carcass weight of broilers in the HS150 and HS300 were higher than those of in the HS0 and HS450. The carcass weight decreased by the HS450 in relation to the other treatments. The dressing percentage increased by the HS150 in relation to the HS450. The HS450 resulted in breast and thigh meat colour that were lighter than those found in the HS0 birds. The HS450 increased fat content of thigh meat in relation to the HS0. It was concluded that the humic acid supplementation at 300 ppm and 450 ppm appears to have a measurable impact on live performance improving feed efficiency and lightness of breast and thigh meat colours in broilers respectively. 相似文献
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Tapio Juokslahti 《Acta veterinaria Scandinavica》1978,19(4):520
Frozen samples of Finnish ready-mixed mink feed were analyzed for total bacterial count, the number of faecal streptococci, the coliform count, the number of haemolytic bacteria and the number of sulphite-reducing bacteria. The investigation comprised 242 feed samples from 38 central kitchens and larger private farm kitchens, the combined feed production of which is about 85 % of the yearly feed production of Finland.Of all samples 48.3 % had a total bacterial count of 106 … 6} × 106 bacteria per g of feed. The total bacterial count was relatively constant during the first four production periods of the year (December-August) and was elevated during the last period (September-November). The percentage of samples containing less than 2.5 × 104 faecal streptococci per g of feed was 49.8 %; 62 % of the samples contained less than 2.5 × 104 coliform bacteria per g. The content of coliform bacteria was lowest during the third production period (May); 48.5 % of the samples contained 5 × 103 … 105 haemolytic bacteria per g, and 4.6 % were negative. The content of haemolytic bacteria was relatively constant during the whole production year; 52.6 % of the feed samples contained 5 × 103 … 105 sulphite-reducing bacteria per g, and 17.2 % were negative. The mean content of sulphite-reducing bacteria was lowest during the second production period (March-April).The results are discussed and compared with corresponding results from Norway and Denmark. 相似文献
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试验旨在研究日粮中添加不同水平酵母培养物对肉仔鸡生长性能、肉品质和肠道菌群的影响。选用432只1日龄、初始体重为（41.73±0.15）g的AA商品代肉仔鸡公雏,随机分为4个处理组（分别在基础日粮中添加0、0.1%、0.2%和0.3%的酵母培养物）,每组6个重复,每个重复18只鸡。试验期42 d,分为1~21和22~42 d两个阶段,试验期间记录采食量、体重和死淘率,试验结束时每个重复选择1只与平均体重接近的肉仔鸡空腹12 h后进行屠宰,测定其屠宰性能和肠道微生物数量。结果显示,与对照组相比,日粮中添加0.2%和0.3%酵母培养物能够显著提高肉仔鸡42 d的体重和试验全期平均日增重（P< 0.05）。且当添加量为0.2%时,能显著提高肉仔鸡22~42 d平均日增重（P< 0.05）,显著降低料重比（P< 0.05）;显著提高试验全期平均日增重和平均日采食量（P< 0.05）,显著降低试验全期料重比（P< 0.05）。同时,添加酵母培养物还可显著降低鸡肉的滴水损失和大肠杆菌数量（P< 0.05）,并显著增加盲肠双歧杆菌数量（P< 0.05）。综上所述,肉仔鸡日粮中添加0.2%酵母培养物的效果最佳,能够显著提高肉鸡生长性能,提高肌肉的系水力,改善其肌肉品质。同时,还能有效增加肉鸡盲肠中有益菌双歧杆菌数量和减少有害菌大肠杆菌数量。 相似文献
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Effect of dietary probiotic,prebiotic and synbiotic supplementation on performance,immune responses,intestinal morphology and bacterial populations in broilers 
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下载免费PDF全文 A. Salehimanesh M. Mohammadi M. Roostaei‐Ali Mehr 《Journal of animal physiology and animal nutrition》2016,100(4):694-700
This study was conducted to investigate the effects of probiotic (Primalac), prebiotic (TechnoMos) and synbiotic (Primalac + TechnoMos) supplementation on performance, immune responses, intestinal morphology and bacterial populations of ileum in broilers. A total of 240 one‐day‐old broiler chicks were randomly divided into four treatment groups which included 60 birds. Control group did not receive any treatment. The chicks in the second, third and fourth groups were fed probiotic (0.9 g/kg), prebiotic (0.9 g/kg) and probiotic (0.9 g/kg) plus probiotic (0.9 g/kg; synbiotic), respectively, at entire period. Daily feed intake, daily weight gain and feed conversion ratio were evaluated. The birds were immunized by sheep red blood cell (SRBC) on days 12 and 29 of age and serum antibody titres were measured on days 28, 35 and 42. Newcastle vaccines administered on days 9, 18 and 27 to chicks and blood samples were collected on day 42. Intestinal morphometric assessment and enumeration of intestinal bacterial populations were performed on day 42. The results indicated that consumption of probiotic, prebiotic and synbiotic had no significant effect on daily feed intake, daily body weight gain, feed conversion ratio, carcass traits, intestinal morphology and bacterial populations of ileum (p > 0.05). Consumption of prebiotic increased total and IgM anti‐SRBC titres on days 28 and 42 and antibody titre against Newcastle virus disease on day 42 (p < 0.05). Synbiotic increased only total anti‐SRBC on day 28 (p < 0.05). It is concluded that consumption of prebiotic increased humoral immunity in broilers. Therefore, supplementation of diet with prebiotic for improvement of humoral immune responses is superior to synbiotic supplementation. 相似文献