佳能对三黄肉鸡生长性能的影响

本试验旨在研究三黄肉鸡日粮添加不同水平的脂肪乳化剂对其生长性能的影响.试验选用健康的1日龄三黄肉鸡300羽鸡,随机分成3组,每组5个重复,每个重复20羽鸡.试验期43 d.对照组饲喂基础日粮;试验Ⅰ组和试验Ⅱ组分别在同期日粮的基础上分别添加佳能150g/t和250 g/t.试验结果表明:试验组和对照组在日增重、日采食量方面差异不显著(P＞0.05).试验组肉鸡料肉比比对照组鸡的料肉比分别降低5.6％,6.1％,差异显著(P＜0.05).     

高粱的加工、粒度和水分对饲料制粒和肉鸡生长性能的影响

本研究旨在评价不同水分和颗粒粒度的高粱制粒或膨化对不同原料粒度、肉鸡代谢能、氨基酸回肠消化率和肉鸡生长性能的影响。试验以720只雄性雏鸡为研究对象,随机分为6组,每组6个重复,每个重复20只。试验处理以2×2×2因子设计,即2种加工方式(制粒和膨化),2个调质水分(1.6%和0.8%),2个颗粒粉碎粒度(650和850μm)。结果显示:在添加1.6%水分的膨化日粮中,制粒制粒和颗粒耐久指数较高。850μm的粒径增加了饲料颗粒耐久指数。各处理组对肉鸡日增重和屠体性状均无显著影响(P>0.05)。在10~13 d饲喂颗粒饲料和添加1.6%水分的饲料的肉鸡表观代谢能和氮校正代谢能均较高(P<0.05),与添加膨化性饲料相比,高粱制粒饲料回肠赖氨酸和甘氨酸消化系数显著提高(P<0.05)。在评价饲料加湿效果时,饲料添加1.6%水分后赖氨酸、蛋氨酸、胱氨酸、甘氨酸、组氨酸、异亮氨酸和精氨酸回肠表观消化系数显著升高(P<0.05)。1.6%水分的膨化饲料较0.8%水分显著提高了21 d肉鸡采食量(P<0.05),在42 d时,0.8%水分的颗粒饲料显著提高了采食量(P<0.05)。结论:以650μm的粉碎粒度和1.6%的水分制备颗粒饲料在肉鸡生长后期可以提高回肠氨基酸消化率和表观代谢能,而膨化工艺提高了42 d肉鸡饲料颗粒制粒和饲料转化率。     

温度驯化对肉鸡生产性能及部分血清生化指标的影响

为研究肉鸡高温驯化对生产性能及再次高温暴露生化指标变化的影响,本试验将30只21 d肉鸡随机均分为对照组、试验Ⅰ组和Ⅱ组。对照组标准环境温度饲养,试验Ⅰ组和Ⅱ组分别高温(32±1)℃,6 h/d驯化1 d和3 d。1周后环境温度升至(32±1)℃,持续6 h后翅下静脉采血2 mL,分离血清,测定生化指标。结果表明,与对照组相比,试验Ⅰ组料肉比、血清肌酐(CREA)、天门冬氨酸转氨酶(AST)、γ-谷氨酰转移酶(γ-GT)、葡萄糖(GLU)显著降低(P005),试验Ⅱ组料肉比显著增加(P005),体重、增重、血清AST、谷丙转氨酶(ALT)、碱性磷酸酶(ALP)、γ-GT、尿素氮显著降低(P005)。此外,与试验Ⅰ组相比,试验Ⅱ组的料肉比显著增加(P005),体重、增重、ALT,ALP、GLU显著降低(P005)。结果提示,高温驯化影响肉鸡的生产性能,但减少肝肾功能的损伤。     

复合酵母对肉鸡生长性能的影响

该试验通过在肉鸡日粮中添加复合酵母,研究复合酵母对肉鸡各个阶段的生长性能影响。结果表明：在肉鸡日粮中以800mg／kg的添加量添加复合酵母,1～49日龄,肉鸡饲养全期添加复合酵母产品,肉鸡的采食量为3．71kg／只,较对照组提高了14.86％。复合酵母能明显提高动物的生长速率,提高肉鸡的日增重速率,缩短养殖周期,复合酵母的全期平均日增重为30.33g／d,相对于对照组27．38g／d的平均日增重分别提高了10．77％。复合酵母对提高肉鸡饲料转化率也具有非常好的效果,在肉鸡饲养前期（1～28日龄）,复合酵母试验组的料肉比为1．48,对照组料肉比为1．55。复合酵母试验组分别较对照组降低了5.16％。复合酵母对降低肉鸡死亡率具有明显的效果,其死亡率为2．6％．而对照组肉鸡死亡率为4.12％。经济效益分析显示：添加复合酵母组肉鸡收益为4．86元,而对照组平均养殖一只肉鸡其收益为4．30元,相对于对照组平均收益率提高了13．02％。试验研究表明：复合酵母对提高动物生长性能,提高动物生长性能,增加肉鸡采食,降低料肉比,提高养殖经济效益具有较好效果。     

抗菌肽对肉鸡生长性能的影响

为研究抗菌肽对AA肉鸡生长性能的影响,本试验选用健康无病、体重相近的1日龄AA肉鸡800羽,随机分成8组,测定AA肉鸡生长性能相关指标。试验结果表明,从试验第1天至第42天全程来看,Ⅲ组～Ⅷ组AA肉鸡的平均日增重均显著高于Ⅰ组和Ⅱ组AA肉鸡的(P <0.05);Ⅲ组～Ⅷ组AA肉鸡的料肉比均显著低于Ⅰ组和Ⅱ组AA肉鸡的(P <0.05);Ⅱ组～Ⅷ组AA肉鸡的腹泻率和死亡率均极显著低于Ⅰ组AA肉鸡的(P <0.01),在抗菌肽的添加效果上,Ⅲ组～Ⅷ组明显优于在日粮中添加抗生素的Ⅱ组。     

粗纤维浓缩物可提高肉鸡生长性能

将一种新型天然纤维浓缩物添加入肉鸡饲料,可以提高生长性能、降低死亡率并改善胴体性状。     

不同制粒温度处理的日粮对肉鸡饲料营养物质消化率和生产性能的影响

试验设置70℃、80℃和90℃三个不同的制粒温度的处理组,采用饲养和代谢试验研究经不同制粒温度处理的日粮对艾维茵肉鸡生产性能和营养物质消化率的影响,旨在阐明不同制粒温度对饲料品质的影响并找到一个适宜的制粒温度。结果表明：三个处理组日粮对肉鸡营养物质采食量、营养物质消化率和生产性能均有不同程度的影响,但相互之间差异不显著（p〉0.05）,80℃时平均日增重和饲料报酬最好。高制粒温度有降低肉鸡的生产性能的趋势。肉鸡颗粒饲料适宜的制粒温度为70℃-80℃。     

母体安抚信息素Secure Poultry~?对817肉鸡生产性能的影响

母鸡尾脂腺分泌类似物（MHUSA）作为母体化学信息素可以减少肉鸡的应激,应激会影响肉鸡的采食行为,本试验旨在测试MHUSA合成类似物母体安抚信息素Secure Poultry~?对817肉鸡相关生产性能指标和饲料转化率等影响。76 200只1日龄健康817鸡苗,随机均分为对照组和试验组,饲养在基础设施相同的两栋鸡舍,除试验组悬挂Secure Poultry~?凝胶块外,其他饲养管理均相同。1～35日龄各组鸡每周末随机选择50只鸡称重,求平均值;以屠宰场提供的36日龄、43日龄数据为依据,统计屠宰鸡总数量、总出栏重和折率（胴体重/宰前体重）;记录各组鸡每天的死淘数和每周的死淘率;统计各组鸡的饲料消耗总量和总生产成本,计算试验的最终料肉比和生产成本。结果表明：母体安抚信息素对817肉鸡早期生长（1～35日龄）有较好的促进作用,能优化肉鸡的生长均匀度,提高817肉鸡的屠宰均重和折率;母体安抚信息素可降低817肉鸡出栏时的料肉比和出栏成本。由此可以看出,使用母体安抚信息素Secure Poultry~?可以提高817肉鸡的生长速度,降低料肉比。     

一种微生态制剂复合物在肉鸡上的应用效果试验

本试验旨在研究由枯草芽孢杆菌、地衣芽孢杆菌、丁酸梭菌及其代谢物组成的微生态制剂复合物在肉鸡上的应用效果。结果显示在肉鸡饮水中自配的微生态制剂可促进快大型肉鸡的生长能力、提高饲料报酬和经济效益。     

二次制粒加工教槽料对哺乳仔猪生长性能的影响

选择40头(长×大)杂交母猪所产的仔猪进行试验.按所产乳猪7日龄体质量一致的原则,将40头母猪分为4个处理组,每组10头猪.按照制粒工艺和原料预处理不同,设计2因素2水平试验,生产教槽料.研究二次制粒教槽料对乳猪生长性能的影响.结果显示:采用二次制粒工艺、膨化玉米和膨化豆粕原料的处理4组乳猪,平均日增质量和平均日采食量显著大于其他3组,而血清尿素氮指标显著小于其他3组.试验证明,在选择膨化玉米与膨化豆粕优质饲料原料的基础上,采用二次制粒工艺,尤其先将鱼粉、膨化玉米和膨化豆粕进行第1次高温制粒,所生产的教槽料对提高乳猪生长性能具有良好的效果.     

高油玉米对肉仔鸡生产性能的作用

选用１８９只一日龄爱拔益加雄性肉仔鸡进行为期７周的饲养试验，以高油玉米和普通玉米普原料配制日粮，观察高油玉米和普通玉米对肉仔鸡生产性能的影响的差异。试验共分３个处理，每个处理７个重复，参照ＮＲＣ《家禽营养需要》（１９９４）配制基础日粮。在试验的第１，２１，４２，４９ｄ进行个体称重，并统计采食量。试验结果表明，以高油玉米和普通玉米加油配制的日粮对肉仔鸡的晶产重明显优于普通玉米不加油组（Ｐ〈０．０５）     

Effects of the Addition of Roller Mill Ground Corn to Pelleted Feed on Pelleting Parameters,Broiler Performance,and Intestinal Strength

Maintaining an optimal pelleting production rate can be difficult when manufacturing feeds for meat birds. Increased production time may be required to fill feed demand and feed outages occur if demand is not met. Identifying management strategies to enhance overall feed production rate without compromising broiler performance is warranted. This study examined the effects of adding varying amounts of corn, ground through a roller mill, to pelleted supplements on feed production parameters, growth performance, and intestinal strength of broiler chickens. Four treatments were used from 18 to 41 d, which included a control (total diet pelleted), and addition of rolled corn to pelleted supplements at 15, 25, and 35% of the corn required in diet formulation. The final diets fed were identical in nutrient composition. Decreasing the amount of ground corn in the pelleted supplement did not affect pellet durability index in the grower diet, but pellet quality declined in the finisher diet. The dietary treatments did not adversely affect final BW gain or feed conversion. Progressive additions of ground corn to pelleted supplement did not affect gizzard weight or peak force intestinal strength. These data indicate that 35% of the formula corn can be added postpellet to reduce electrical cost for grinding and pelleting and improve overall production rate without adversely affecting cumulative growth performance of broilers.     

Efficacy of a Litter Amendment to Reduce Pododermatitis in Broiler Chickens

Broiler house environment, especially volatile NH₃ content, has a significant effect on pododermatitis in chickens. The efficacy of NaHSO₄ in reducing pododermatitis in broiler chickens was investigated in this study. A total of 960 straight-run 1-d-old chicks were randomly assigned to 16 environmental chambers with 4 different levels of NaHSO₄ (4 chambers/treatment). The treatments (TRT) comprised of TRT 1 (control), TRT 2 with NaHSO₄ applied at 1 × rate (0.22 kg/m²) on the day of placement of chicks, TRT 3 with NaHSO₄ applied at 2 × rate on the day of placement of chicks, and TRT 4 with NaHSO₄ applied at 1 × rate on the day of placement of chicks and at 1 × rate on 21 d. Birds were raised to 49 d of age on a 4-stage feeding program with diets formulated to contain high protein levels and all-vegetable ingredients. At 35 d of age, the litter was moistened artificially to see the effect of NaHSO₄ on NH₃ volatilization. In addition to assessing live performance, feet were scored on 42 and 49 d of age for incidence and severity of pododermatitis. Ammonia concentration (ppm) in the chambers was measured before placement of chicks and on a weekly basis throughout the experiment. No differences in live performance of the birds were observed throughout the study (P > 0.05). Sex had significant effects on incidence of pododermatitis (P < 0.05), with females showing higher incidence of pododermatitis than males. The NaHSO₄ had a significant effect on NH₃ volatilization in the chambers (P < 0.05). Ammonia concentration was significantly reduced in all TRT except the control (TRT 1). Sodium bisulfate had no significant effect on NH₃ levels after 35 d upon addition of moisture to the litter. Although not significant (P > 0.05), using NaHSO₄ as a litter amendment numerically reduced the incidence of pododermatitis by 10 or more percentage points.     

Evaluation of a Feed-Grade Enzyme in Broiler Diets to Reduce Pododermatitis

Nutritional and management interventions are needed to reduce the incidence of pododermatitis in poultry. In this study, enzyme (Allzyme Vegpro) supplementation of corn-soybean meal-based broiler diets was evaluated in an effort to reduce total N and NH₃ production and its effect on pododermatitis in broiler chickens. A total of 1,600 mixed-sex chicks were raised on floor pens in a design involving 2 × 2 × 2 arrangement of protein level [high or low], protein source [all vegetable (Veg) or vegetable plus animal (Veg + Ani)], and enzyme [with or without enzyme supplementation (0.06%)], on a 4-stage feeding program (4 replicate pens/treatment; 50 birds/pen). In addition to live performance, the feet were scored for incidence of lesions on all birds on 28, 42, and 57 d of age, and the severity was recorded as none, mild, and severe. Pooled gut samples were collected at 57 d of age to determine viscosities of fore- and hindgut contents. Pooled litter samples were analyzed for moisture, total N, and NH₃ production at 14, 28, 42, and 57 d of age. Live performance of birds did not vary among the treatments (P > 0.05). The incidence of pododermatitis was significantly affected by protein source at 42 d (P < 0.05), with birds fed all-vegetable diets showing higher incidence and severity than those fed vegetable plus animal diets. At 57 d of age, birds reared on all-vegetable diets with enzyme supplementation showed a lower incidence of mild footpad lesions compared with other treatments. Enzyme supplementation reduced viscosity of the gut contents irrespective of the protein level or protein source. Higher levels of litter NH₃ were observed with high-protein diets (28 and 42 d), all-vegetable diets (28 d), and with enzyme supplementation (28 and 42 d). In this study, enzyme supplementation had little effect on litter total N and NH₃ production levels, but reduced viscosity of the gut contents and severity of pododermatitis in older birds.     

走出饲料企业人力资源管理误区

有的饲料企业往往重视企业的发展速度，忽视企业内部的人力资源管理，尤其在企业发展初期，速度压倒一切的情况下，人力资源管理问题就退居次要地位。对饲料企业而言，解决好资金和技术问题，是经营好企业的现在；而解决好人力资源管理的问题，则是经营好企业的未来，是关系到饲料企业能否实现可持续发展的关键问题。 　　下面就饲料企业发展过程中的人力资源常见误区逐一剖析，并提出相应对策，希望对饲料企业的人力资源管理有所帮助。 　　误区一：一味强调招聘有工作经验的员工 　　绝大部分的饲料企业在招募员工时，都要加上应聘者具有 …     

棉油致肉种鸡生产性能和繁殖性能下降的事故报告

2006年11月,河南省武陟县焦作禽业公司肉种鸡场种蛋孵化率急剧下降,半个月内由80．9％下降至最低18．1％,同时产蛋率也出现下降,由83．5％下降至最低的74．8％。经过现场调查、原因分析、化验检测和防治效果验证,确诊为饲用豆油中掺有大量棉油导致的结果,现将调查和防治情况汇报如下：     

高温季节添加小苏打对肉用仔鸡生产性能的影响研究

为探讨小苏打对高温季节肉用仔鸡生产性能的影响，选择21日龄AA肉用仔鸡2000羽，随机分试验组和对照组，每组2个重复。试验组饲料中添加0．4％小苏打。结果显示，试验组比对照组平均日增重提高7．67％，差异显著（P〈0．05）；饲料报酬提高10．05％，差异显著（P〈0．05）；中暑发生率下降55．00％，差异极显著（P〈0．01）；死亡率下降61．29％，差异极显著（P〈0．01）。经济效益分析，试验组比对照组每羽肉鸡多获毛利18．07％，差异显著（P〈0．05）。     

益生素对肉仔鸡生产性能的影响

选用240只AA肉仔鸡,随机分成4组,对照组饲喂基础日粮,试验组在基础日粮中分别添加杆菌肽锌(20mg/kg)、2%和3%的益生素,比较试验鸡的生产性能。结果表明:日粮中添加2%和3%的益生素可显著提高肉鸡的日增重、饲料效率、成活率、屠宰率(<0.05);益生素可替代抗生素杆菌肽锌提高肉鸡生产性能。     

适当水流对达到最佳肉鸡生产性能的必要性研究

基于阿肯色州大学研究者的研究．Charles H．Goan在总结肉鸡养殖业关心的问题时说道,“任何肉鸡供水系统的目的都足为了提供充足的水,以实现禽类的最佳生长和获得最好效益”。