Effects of split feeding on performance,egg quality,and bone strength in brown laying hens in aviary system     

《The Journal of Applied Poultry Research》2018,27(3):401-415

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13～18周龄笼养蛋鸭适宜蛋白质和蛋氨酸水平的研究   总被引：4，自引：1，他引：3  

赵玉华  王安 《畜牧与兽医》2002,34(9):11-14

用 32 4羽满 1 2周龄的金定鸭 ,通过饲养试验、代谢试验、屠宰试验和对试鸭产蛋期 (1 9～ 2 8周龄 )产蛋性能的观察 ,研究了在等能条件下(ME :1 1 51MJ/kg) ,不同蛋白质水平 (CP :1 3 %、 1 5 %、 1 7% )和蛋氨酸水平 (Met/CP :0 0 1 7、 0 0 2 2、 0 0 2 7)组成的 9种饲粮对 1 3～ 1 8周龄笼养蛋鸭的生长性能、养分利用、体成分沉积和产蛋期产蛋性能的影响。结果表明 :该阶段饲粮粗蛋白、蛋氨酸水平对体增重影响不显著 (P >0 0 5) ;体增重与蛋氨酸 (% )呈一定的正相关 (r=0 4574) ;CP为 1 3%、Met/CP为 0 0 2 7组采食量一直较稳定、较高 ,且饲料效率又好。代谢试验 :不同粗蛋白、蛋氨酸水平饲粮对试鸭氮存留率和能量的利用率影响显著(P <0 0 5或P<0 0 1 ) ,且它们随饲粮CP水平的升高而降低 ,随蛋氨酸水平升高而升高 ;磷的利用率也分别以CP为 1 3%的水平和Met/CP为 0 0 2 7的水平极显著地高于其他水平对磷利用率 (P <0 0 1 )。屠宰试验 :当Met/CP为 0 0 2 7时 ,体氮沉积量和体磷沉积量最佳。产蛋性能 :开产日龄和高峰日龄与 1 3～ 1 8周龄CP食入量呈弱的负相关 (r=- 0 1 83 3和r=- 0 0 984) ,与蛋氨酸食入量呈正相关 (r =0 5780和r =0 435 0 )。饲粮粗蛋白、蛋氨酸水平对 1 9～ 2 8周龄  相似文献   

蛋鸡低饲养标准饲粮配方的研究     

汪鸿儒  宋金昌 《甘肃农业大学学报》1989,(3)

为适应本地区当前生产需要,用低饲养标准饲粮配方,对莱杭鸡的生长与产蛋性能进行了比较试验。结果表明,在整个试验期内,补加鱼粉(1—5%)的试Ⅰ组,和含2种饼类(2—14%)的试Ⅱ组,在体重、料重比(试Ⅰ组—5.87,试Ⅱ组—6.07,对照6.66),产蛋量,料蛋比(试Ⅰ组—3.83,试Ⅱ组—3.88,对照—4.28)和盈利(元/只:试Ⅰ组—1.03,试Ⅱ组—1.23,对照—0.75)等方面较好:但因试Ⅰ组中鱼粉价高而盈利较低;加菜籽饼(2%)和豌豆粉(3—6.7%)的第Ⅲ组与选自生产配方中的对照组,在生产性能与效益方面较低,但仍可盈利,属于低标准、低效益配方,适于在饲养条件差和经营水平低的养鸡场、户采用。  相似文献   

暖卫工程施工质量通病的发生与防治     

段长毅  何军  冉宪文 《林业科技情报》2001,33(2):51-51

本文论述了暖卫工程跑、冒、滴、漏、堵等五大质量通病的发生原因及防治方法建议等。  相似文献   

中药骨疏康对笼养蛋鸡生产性能的影响   总被引：3，自引：1，他引：2  

邓益锋  侯加法 《畜牧与兽医》2003,35(10):14-16

54羽 2 0周龄伊莎蛋鸡分为 2组 ,A组为正常组 (2 7羽 ) ,B组为已发生骨质疏松组 (2 7羽 )。每组又随机分为 3组 ,每组 9只 ,分别喂骨疏康 1号、骨疏康 2号和对照组。试验期间 ,每天记录产蛋情况 ,定期测定骨矿含量、雌激素水平。结果表明 :骨疏康 1号能显著提高产蛋率 (P <0 0 5) ;骨疏康 2号在B组能显著提高产蛋率 ,在A组差异不显著 ,骨疏康 1号、 2号之间差异不显著。骨疏康 2号能显著提高蛋壳强度。中药对骨矿影响不显著。VitD3能显著提高产蛋率 ,改善蛋壳品质  相似文献   

产蛋前期必需氨基酸需要量的测定及饲粮氨基酸模型的建立   总被引：2，自引：0，他引：2  

《中国兽医学报》1995,(4)

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日粮中添加柑桔皮粉对产蛋后期蛋鸡钙磷代谢的影响   总被引：1，自引：1，他引：1  

雷风 《青海畜牧兽医杂志》2004,34(3):7-8

将 48周龄黄金褐蛋鸡 10只随机分成两组 ,对照组喂基础日粮 ,试验组用 2 5 %的柑桔皮粉等量替代基础日粮中的玉米 ,结果表明 :试验组钙磷表观代谢率为 65 79%、46 3 9% ,钙比对照组 (62 3 0 % )提高了 3 49个百分点 (P <0 0 5 ) ,磷比对照组 (4 7 5 2 % )降低了 1 13个百分点 (P >0 0 5 )。  相似文献   

酵母铬与L-肉碱对蛋鸡生产性能及脂质代谢的影响   总被引：6，自引：0，他引：6  

杜荣  秦健  王俊东  庞全海 《畜牧兽医学报》2004,35(6):653-659

选用21周龄海兰褐壳蛋鸡288只,随机分为9组,每组32只,采用3×3(铬×L-肉碱)2因子3水平有重复交叉试验设计,预试2周后,在玉米-豆粕型日粮的基础上添加不同水平的酵母铬(以铬计:0、400、600μg/kg)与L-肉碱(0、50、100mg/kg),以饲喂基础日粮组为对照组,用以研究二者对蛋鸡生产性能及脂质代谢的影响,并初步探讨二者的互作效应,试验期7周。结果表明:600μg/kg铬或100mg/kgL-肉碱对脂质代谢多数指标效果显著(P<0.05或0.01);二者同时添加对蛋黄胆固醇、肝脏甘油三酯及腹脂率等均产生显著互作效应(P=0.0003～0.0500),且400μg/kg铬和100mg/kgL-肉碱混合添加对降低蛋黄胆固醇比其它各组均表现出优势,400μg/kg铬和50mg/kgL-肉碱混合添加对降低腹脂率比其它各组均表现出优势。铬或(与)L-肉碱在降低蛋鸡肝脂、腹脂及蛋黄胆固醇的同时并未影响蛋鸡的生产性能。  相似文献   

Effects of milk thistle meal on performance,ileal bacterial enumeration,jejunal morphology and blood lipid peroxidation in laying hens fed diets with different levels of metabolizable energy          下载免费PDF全文

N. S. Hashemi Jabali  A. H. Mahdavi  S. Ansari Mahyari  M. Sedghi  R. Akbari Moghaddam Kakhki 《Journal of animal physiology and animal nutrition》2018,102(2):410-420

This study was conducted to evaluate the effects of different levels of milk thistle meal on performance, blood biochemical indices, ileal bacterial counts and intestinal histology in laying hens fed diets containing different levels of metabolizable energy. A total number of 200 Leghorn laying hens (Hy‐Line W‐36) were randomly assigned to eight experimental treatments with five cage replicates of five birds each. Dietary treatments consisted of four levels of milk thistle meal (0%, 15%, 30% and 60%) and two levels of AME_n (11.09 and 12.34 MJ/kg) fed over a period of 80 days. In vitro studies revealed that the total phenolic component of milk thistle meal was 470.64 mg gallic acid equivalent/g of the sample, and its antioxidant activity for inhibiting the 2‐2‐diphenyl‐1‐picrichydrazyl free radical and reducing ferric ions was about 21% higher than that of butylated hydroxyltoluene (p < .05). Diets containing high level of AME_n led to improved egg production (p < .05), egg weight (p < .05), egg mass (p < .01) and feed conversion ratio (p < .01). In addition, offering diets containing high energy significantly enhanced (p < .01) serum triglyceride and malondialdehyde (MDA) concentrations as well as jejunal villus height. Dietary supplementation of 3% milk thistle meal resulted in the best feed conversion ratio (p < .05), reduction of ileal Escherichia coli enumeration (p < .01) and an enhancement in the villus height‐to‐crypt depth ratio (p < .05). Furthermore, feeding incremental levels of this meal led to remarkable decrease in serum cholesterol, triglyceride and MDA (p < .01) concentrations while significant increase in blood high‐density lipoprotein content and goblet cell numbers (p < .05). The present findings indicate that milk thistle meal with high antioxidant and antibacterial properties in laying hen diets may improve health indices and productive performance.  相似文献   

Effects of in ovo injection of chrysin,quercetin and ascorbic acid on hatchability,somatic attributes,hepatic oxidative status and early post‐hatch performance of broiler chicks          下载免费PDF全文

F. Khaligh  A. Hassanabadi  H. Nassiri‐Moghaddam  A. Golian  G.‐A. Kalidari 《Journal of animal physiology and animal nutrition》2018,102(1):e413-e420

An experiment was conducted to evaluate the effects of in ovo injection of chrysin, quercetin and ascorbic acid on hatchability, somatic attributes, hepatic antioxidant status and early post‐hatch growth performance of broiler chicks. Four hundred and eighty embryonated broiler breeder eggs containing live 18‐day‐old embryos were divided into six groups of 80 eggs each. One group remained intact and served as a control group (i), whereas the other five groups were injected with the prepared injection solutions as follows: (ii) 0.05 ml distilled water; (iii) 0.05 ml distilled water containing 6 mg ascorbic acid; (iv) 0.05 ml dimethyl sulfoxide (DMSO); (v) 0.05 ml DMSO containing 4.5 mg quercetin; and (vi) 0.05 ml DMSO containing 4.5 mg chrysin. The hatchability rate, hatching weight, residual yolk sac weight, yolk sac‐free body weight, liver weight, hepatic glutathione peroxidase and total superoxide dismutase activities, as well as malondialdehyde concentrations, were not affected by the injected solutions. There were no differences between chicks hatched from the control and in ovo injected eggs in weight gain, feed intake and feed conversion ratio from 0 to 11 days of age. However, the specific contrast performed between the in ovo injected groups and intact eggs revealed that in ovo injection significantly increased hatchability rate (p = .0493). This finding also implies that our injection procedure was harmless. In conclusion, the intra‐egg injection of chrysin, quercetin or ascorbic acid at the injection rates used in this study did not have a significant effect on hatchability, somatic characteristics, early growth performance and hepatic antioxidant status of broiler chicks. However, the overall hatchability was higher in the in ovo injected eggs as compared to non‐injected ones. These findings also confirmed the harmlessness of the procedure developed for in ovo injection in this study.  相似文献