日粮中添加女贞子粉对蛋鸡生产性能和蛋品质的影响

选择150只49周龄、平均体重(1.99±0.17)kg的健康海兰褐蛋鸡,采用单因素完全随机分组试验设计,随机分为对照组(基础日粮)、试验组Ⅰ(基础日粮+0.5%女贞子粉)、试验组Ⅱ(基础日粮+1%女贞子粉)。每组设5个重复,每个重复10只蛋鸡,试验期为8周,研究了女贞子粉对蛋鸡生产性能和蛋品质的影响。结果表明:与对照组相比,试验组Ⅰ、Ⅱ产蛋率分别提高了4.86%和11.75%(P0.05)。试验组Ⅰ蛋黄颜色显著高于对照组9.60%(P0.05)。日粮中添加女贞子粉可以提高蛋鸡产蛋率,改善蛋黄颜色,进而提高蛋鸡的生产性能和蛋品质。     

酵母菌培养物对蛋鸡生产性能及蛋品质的影响

270只19周龄的ISABrow母鸡随机分3组处理,每个处理5个重复,研究酵母培养物对产蛋鸡产蛋性能和蛋品质的影响。试验为期16周。酵母培养物在试验中的添加水平分别为0%、0.1%、0.2%。试验中采用的玉米-豆粕型基础日粮中粗蛋白质为16.0%,能量为2800kcal/kg。试验结果表明,饲喂添加0.1%酵母培养物组产蛋鸡的生产性能和每日产蛋量显著提高(P<0.05);各处理组之间的蛋重、饲料摄入和饲料转化率无显著差别;试验组与对照组的蛋壳质量、哈氏单位、蛋黄颜色和蛋黄中脂肪酸含量也无显著差别。     

酯化牛膝多糖对蛋鸡生产性能和蛋品质的影响

为研究饲料中添加酯化牛膝多糖对蛋鸡生产性能和蛋品质的影响,选取134日龄海兰灰商品代蛋鸡240只,随机分为6组,每组设4个重复,每个重复10只鸡。试验Ⅰ组设为对照组,饲喂基础日粮,试验Ⅱ～Ⅵ组为酯化牛膝多糖处理组,分别在基础日粮中添加50、100、200、300、400 mg/kg的酯化牛膝多糖,研究其对蛋鸡生产性能及蛋品质的影响。结果表明:与对照组相比,50 mg/kg组、100 mg/kg组和200 mg/kg组蛋鸡的产蛋率、蛋重有显著提高(P <0.05),产蛋率151～167日龄分别提高1.51%、 3.25%、1.74%;168～184日龄分别提高4.47%、5.84%、4.47%;100 mg/kg组和200 mg/kg组185～202日龄分别提高2.81%、2.58%,均达到显著水平。185日龄100 mg/kg组以及202日龄100 mg/kg和200 mg/kg组的蛋重分别提高4.29%、5.41%、4.47%,显著高于对照组。50 mg/kg组、100 mg/kg组和200 mg/kg组的料蛋比分别降低2.00%、2.40%、2.40%,差异显著(P <0.05)。100 mg/kg酯化牛膝多糖组哈氏单位显著提高(P <0.05),151、168、185、202日龄分别比对照组提高了7.25%、6.4%、8.14%和10.34%;其对蛋黄相对重、蛋壳厚度、蛋壳强度及蛋壳相对重无显著影响(P> 0.05)。     

不同饲养方式对蛋鸡生产性能、鸡蛋品质及经济效益的影响

文章旨在评估不同饲养方式对蛋鸡生产性能、蛋品质和血清生化指标的影响.试验选择产蛋性能接近的22周龄海兰褐壳蛋鸡540只,随机分为3组,每组5个重复,每个重复36只.笼养组蛋鸡采用三层阶梯饲养(0.6?m2/只),网上平养组蛋鸡在金属网丝上饲养(1.5?m2/只),垫料平养组在平铺20?cm稻壳的水泥地板上平养(1.8?...     

人参提取物对蛋鸡产蛋性能、蛋品质、血清生化指标及经济效益的影响

文章旨在评估日粮添加不同水平人参提取物对蛋鸡产蛋性能、蛋品质及血清生化指标的影响.试验选择产蛋性能一致的450只海兰褐壳蛋鸡,随机分为3组,每组5个重复,每个重复30只.对照组饲喂基础日粮,处理组分别在基础日粮中添加0.04％和0.08％人参提取物,试验共进行6周.结果:与对照组相比,0.04％和0.08％人参提取物组...     

两种复合酶对产蛋后期蛋鸡生产性能、蛋品质及血清生化指标的影响

为研究两种复合酶对产蛋后期蛋鸡生长性能、蛋品质及血液生化指标的影响,试验采取单因素试验设计,选用540只60周龄的海兰褐蛋鸡,随机分成3组,每组6个重复,每个重复30只鸡.对照组饲喂基础饲粮,试验组分别在基础日粮中添加两种复合酶,其中复合酶Ⅰ主要由糖化酶和蛋白酶组成,复合酶Ⅱ为复合酶Ⅰ+普鲁兰酶.试验周期为60 d.结...     

Effects of Antimicrobial peptides on egg production,egg quality and caecal microbiota of hens during the late laying period

This study was conducted to determine the effects of diet supplementation of laying hens with antimicrobial peptides (AMP) on egg production, egg quality and caecal microbiota. A total of 360 Hy‐Line Brown laying hens (72 weeks old) were divided into three groups with four replicates of 30 birds each. The laying hens were fed with the basal diet (Control), the basal diet + 50 mg/kg AMP (group 1) and the basal diet + 100 mg/kg AMP (group 2). The experiment lasted for 45 d. Eggs were collected daily and caecal samples were collected at the end of the experiment. The results showed that AMP supplementation caused a significantly increased laying rate and decreased feed/egg ratio (p ＜ .05). Meanwhile, a distinctive difference in cecal microbiota was observed between AMP and control groups and the average values of microbial diversity and richness were lower in the AMP group than in the control group. At the phylum level, the relative abundance of Verrucomicrobia and Cyanobacteria were lower in the AMP group than in the control group. In conclusion, the results indicated that dietary supplementation with AMP can improve egg production and affect the cecal microbial community membership and structure of hens during late laying period.     

乳酸锌对蛋鸡生产性能及蛋壳质量的影响

为研究乳酸锌对蛋鸡生产性能及蛋壳质量的影响,试验采用单因子随机分组试验设计,选取1600只360日龄的罗曼粉壳蛋鸡,随机分为4个处理组,每个处理组8个重复,每个重复50只鸡。础饲日粮为玉米-豆粕型粉状饲粮,处理1组饲喂基础饲粮+60 mg/kg一水硫酸锌(以锌计),处理2组饲喂基础饲粮+60 mg/kg乳酸锌(以锌计),处理3组饲喂基础饲粮+40 mg/kg乳酸锌(以锌计),处理4组饲喂基础饲粮+60 mg/kg锌(一水硫酸锌和乳酸锌提供的锌各一半)。结果表明,蛋鸡日粮中添加60 mg/kg乳酸锌(以锌计)能显著降低平均破蛋率、提高平均蛋壳强度(P<0.05)和明显提高平均蛋壳厚度,并且平均死亡率最低,但对蛋鸡的平均产蛋率、平均蛋重、平均日采食量和平均料蛋比无显著影响(P>0.05)。     

The effects of dietary calcium iodate on productive performance,egg quality and iodine accumulation in eggs of laying hens

The aim of this study was to examine the effects of various levels of supplemental calcium iodate (CI) on productive performance, egg quality, blood indices and iodine (I) accumulation in the eggs in commercial laying hens. A total of 240 White Leghorn layers (Hy‐line W36) were divided through a completely randomized design into six treatments with five replicates and eight hens per each at 32 weeks of age. This experiment lasted for 12 weeks. Concentrations of I in the mash diets were 0.74, 3.13, 5.57, 8.11, 10.65 and 12.94 mg I/kg of feed in treatments 1–6 respectively. The added doses of CI were included 0.0 (control), 2.5, 5.0, 7.5, 10.0 and 12.5 mg/kg of diet for treatments 1–6 respectively. There were no significant differences in productive performance among the treatments. The highest eggshell strength was observed in group fed diet containing 3.13 mg I/kg (p = .014). The highest percentage of calcium and lowest percentage of phosphorus in eggshell were observed in group fed diet containing 12.94 mg I/kg (p = .0001). Feeding hens with diet containing 12.94 mg I/kg increased serum triiodothyronine‐to‐thyroxine ratio (p = .0001). Serum alanine aminotransferase activity in hens fed diet containing 12.94 mg I/kg was significantly more than control (p = .041). Blood Serum triglycerides in hens fed diet containing 8.11 mg I/kg were significantly higher than control (p = .0001). Edible fraction of the eggs of birds fed diet containing 12.94 mg I/kg was enriched by I almost 3 times more than those fed diet containing 0.74 mg I/kg. The results suggested that egg production, egg mass, feed intake and feed conversion ratio were not significantly affected by dietary I levels. Iodine accumulation in the eggs were increased by increasing dietary I levels and the level of 10 mg/kg CI could supply I enrichment of the eggs.     

乳酸锌对蛋鸡生产性能及蛋壳质量的影响

本试验旨在研究乳酸锌对蛋鸡生产性能及蛋壳质量的影响。试验采用单因子随机分组试验设计,选取1600只360日龄的罗曼粉壳蛋鸡,随机分到4个处理组,各处理组8个重复,每个重复50只鸡。基础饲粮采用为玉米－豆粕型粉状饲粮,处理1饲喂基础饲粮＋60mg／kg－水硫酸锌（以锌计）,处理2饲喂基础饲粮＋60mg／kg乳酸锌（以锌计）,处理3饲喂基础饲粮＋40mg／kg乳酸锌（以锌计）,处理4饲喂基础饲粮＋60mg／kg锌（－水硫酸锌和乳酸锌提供的锌各一半）。试验结果表明,在产蛋鸡饲粮中100％以乳酸锌替代硫酸锌（提供的锌含量为60mg／kg）,能显著降低平均破蛋率,提高平均蛋壳强度和平均蛋壳厚度（P〈0．05）,死亡率最低,对蛋鸡的平均产蛋率、平均蛋重、平均日采食量和平均料蛋比无显著影响（P〉0．05）。     

发酵饲料对蛋鸡生产性能、蛋品质、输卵管壁厚及卵泡分级的影响

试验旨在探究饲粮添加发酵饲料对蛋鸡生产性能、蛋品质、输卵管壁厚及卵泡分级的影响.取鸡舍环境条件趋于一致的580日龄海兰褐蛋鸡960只,随机分为4组,每组8个重复,每个重复30只鸡.各组饲粮分别添加0(A组)、2.0％(B组)、2.5％(C组)、3.0％(D组)发酵饲料.预试期1w,正式试验期6w.结果 显示,与对照组相...     

维生素E对免疫抑制产蛋鸡生产性能和蛋品质的调控效应

试验探讨维生素E对免疫抑制蛋鸡生产性能和蛋品质的调控效应,选取健康的尼克褐产蛋鸡270只,随机等分为5组,每组3个重复,每重复18只。第Ⅰ组为对照组,第Ⅱ~Ⅴ组为免疫抑制组,对第Ⅱ~Ⅴ组鸡在试验第5、6、7 d进行腿部肌肉注射80 mg/kgBW环磷酰胺(CTX),第Ⅰ组注射等量生理盐水。Ⅰ、Ⅱ组饲喂基础日粮(维生素E含量44.59 mg/kg),Ⅲ、Ⅳ、Ⅴ组在基础日粮中分别添加50、100、200 mg/kg维生素E。结果显示:①免疫抑制产蛋鸡的产蛋率、平均蛋重和平均日采食量显著降低(P<0.05),破蛋率显著升高(P<0.05)。基础日粮中添加50 mg/kg维生素E显著提高免疫抑制产蛋鸡的产蛋率、平均蛋重和平均日采食量(P<0.05),但仍低于对照组Ⅰ(P<0.05);显著降低料蛋比和破蛋率(P<0.05)。②免疫抑制产蛋鸡的蛋壳厚度、蛋壳强度和哈氏单位显著降低(P<0.05),蛋形指数和蛋黄颜色无显著改变(P>0.05);50 mg/kg维生素E添加量显著提高免疫抑制产蛋鸡的蛋壳厚度、蛋壳强度和哈氏单位(P<0.05),与对照组Ⅰ无显著差异(P>0.05)。因此,免疫抑制显著降低产蛋鸡的生产性能和蛋品质;基础日粮中添加维生素E对免疫抑制蛋鸡的生产性能和蛋品质具有明显的调控效应,且以50 mg/kg添加量效果较好。     

Effects of alkaline protease on the production performance,egg quality,and cecal microbiota of hens during late laying period

This study investigated the effects of diet supplementation with alkaline protease (AKP) on the production performance, egg quality, and cecal microbiota of laying hens. A total of 720 Hy-Line Brown laying hens (60 weeks old) were divided into four groups with six replicates of 30 birds each. No AKP was added to the control diet, and the hens in the other three groups (Groups 1, 2, and 3) were fed the basal diet supplemented with AKP preparations at 3, 6, and 9 u/g of diet, respectively. Results showed that AKP supplementation significantly decreased the feed/egg ratio (p < 0.05). Compared with that of the control group, the eggshell strength of Group 1 was significantly increased (p < 0.05), and the egg yolk weight of Groups 1 and 3 was significantly increased (p < 0.05). Distinctive difference in cecal microbiota was observed between AKP and control groups, and the average values of microbial diversity was lower in the AKP group than in the control group. The relative abundance of Bacteroidetes and Firmicutes at the phylum level, Rikenellaceae, Lachnospiraceae, Lactobacillaceae, Erysipelotrichaceae, and Christensenellaceae at the family level, and Rikenellaceae_RC9_gut_Group, Lactobacillus, Romboutsia, Lachnoclostridium, and Blautia at the genus level in the AKP group changed significantly compared with that in the control group (p<0.05).     

米糠替代玉米对蛋鸡蛋品质的影响

为研究米糠替代日粮中玉米对蛋鸡蛋品质的影响,试验选用150只海兰褐蛋鸡(24周龄),随机分为5组,每组3个重复,每个重复10只。分别饲喂用0%、5%、10%、15%、20%米糠替代基础日粮中玉米的日粮,预饲期7d,正式试验期28d。试验结束进行蛋品质测定。结果表明:试验组Ⅳ的蛋形指数比对照组低3.01%(P<0.05);试验组Ⅳ的蛋比重比对照组高3.36%(P<0.05),比试验组Ⅰ高0.84%(P<0.05);试验组Ⅳ的蛋重比对照组高2.18%(P<0.05),比试验组Ⅰ高1.20%(P<0.05);试验组Ⅳ的哈夫单位比对照组、试验组Ⅰ、试验组Ⅱ、试验组Ⅲ分别高4.26%、3.31%、2.47%、1.24%(P<0.05)。表明米糠替代玉米能够改善蛋鸡的蛋品质,且替代20%的玉米效果最佳。     

维生素E对蛋鸡产蛋后期产蛋性能和蛋品质的影响

文章旨在研究日粮中不同梯度维生素E添加水平对蛋鸡产蛋后期产蛋性能和蛋品质的影响.试验选择60周龄罗曼白壳商品蛋鸡300羽,试验随机分为5组,添加水平分别为0(对照组),30、60、120、240 mg/kg,每组6个重复,每个重复10羽鸡,预试期1周,正试期8周.结果表明:与对照组相比,蛋鸡产蛋后期日粮中添加120 m...     

鲜茶叶粉对蛋鸡生产性能、蛋品质、蛋黄脂肪酸水平及经济指标的影响

文章旨在评估日粮添加不同水平的鲜茶叶粉对蛋鸡生产性能、蛋品质及蛋黄脂肪酸水平的影响.试验将672只产蛋性能一致的28周龄海兰褐壳蛋鸡随机分为4组,每组4个重复,每个重复42只.对照组饲喂基础日粮,处理组蛋鸡分别饲喂基础日粮+20(T1)、40(T2)和60?mg/kg(T3)鲜茶叶粉,试验为期6周.结果:与对照组相比,...     

有机源锌和锰对蛋鸡生产性能、蛋壳和骨质量的影响

文章旨在研究日粮添加有机源锌和锰替代无机锌和无机锰对蛋鸡生产性能、蛋壳和骨骼质量的影响。试验选择31周龄产蛋性能接近的罗曼粉壳蛋鸡616只,随机分为7组,每组4个重复,每个重复22只。基础日粮锌和锰含量分别为50和30 mg/kg,对照组饲喂基础日粮,分别添加氧化锌和硫酸锰(锌40 mg/kg,锰60 mg/kg)。处理组分别在基础日粮中添加20 mg/kg有机锌,30 mg/kg有机锰、20 mg/kg有机锌+30 mg/kg有机锰、40 mg/kg有机锌、60 mg/kg有机锰、40 mg/kg有机锌+60 mg/kg有机锰,上述含量均以相应元素计。试验共进行7周。结果显示:日粮用有机锌或锰替代50%或100%无机锌、锰对蛋鸡生产性能相关参数均无显著影响(P> 0.05)。对照组相比,有机锌或锰替代无机锌或锰的比例对32、46、60和74周龄蛋鸡蛋壳相对重量、蛋壳密度和蛋壳厚度均无显著影响(P> 0.05)。与对照组相比,30 mg/kg有机锰、20 mg/kg有机锌+30 mg/kg有机锰组的蛋壳强度显著提高(P <0.05)。40 mg/kg有机锌+60 mg/kg有机锰组较无机锌、锰组显著提高了60、74周龄及全期蛋壳强度(P <0.05)。日粮添加有机锌或锰对胫骨物理参数及胫骨和趾骨灰分含量均无显著影响。结论 :日粮添加有机锌、锰替代无机锌锰对蛋鸡产蛋性能和骨质量无影响,但可以降低蛋鸡由于年龄升高对蛋壳强度的负面影响。     

Effect of dietary digestible lysine concentration on performance,egg quality,and blood metabolites in laying hens

An experiment was conducted to evaluate the effect of dietary digestible lysine concentration on productive performance, egg quality, and blood metabolites in laying hens. A completely randomized block design was performed with 5 treatments and 6 replicates of 8 Hy-line W-36 hens each, from 32 to 44 wk of age. The treatments were 5 digestible lysine concentrations (0.657, 0.707, 0.757, 0.807, and 0.857% of diet). Feed intake was significantly increased with each increment in dietary digestible lysine concentration. Significant improvement in egg production, egg weight, egg mass, Haugh unit, and FCR were observed by an increase in lysine intake. Dietary lysine concentration did not have a significant impact on percentage of egg components, specific gravity, eggshell thickness, DM, and protein constituents of eggs. Dietary digestible lysine concentration did not have a significant effect on triglyceride, cholesterol, high-density lipoprotein (HDL), low-density lipoprotein (LDL), uric acid, and total protein in plasma. The digestible lysine requirements for optimal egg production, egg mass, and egg weight (32 to 44 wk of age), based on the linear broken-line regression analysis, were 814, 810 and 778 (mg/b/d), respectively. Whereas, these values were 4, 3.9, and 6 percent less than those estimated by the quadratic broken-line model, respectively.     

低豆粕日粮对产蛋鸡生产性能及蛋品质的影响

试验选用1 600只生产性能相同、体况良好的33周龄罗曼蛋种鸡,随机分为4组,在总蛋白质含量相同和满足必需氨基酸需要量的情况下,用价格较低的蛋白饲料取代蛋鸡日粮中豆粕,研究氨基酸平衡的低豆粕日粮对蛋种鸡生产性能和蛋品质的影响。结果表明:氨基酸平衡的低豆粕日粮对蛋鸡产蛋率、种蛋合格率、健雏率、蛋形指数、蛋比重、蛋壳厚度、哈氏单位等指标无显著影响(P>0.05),但当日粮中的豆粕含量降低8～15个百分点时,蛋种鸡的日平均蛋重、日采食量、受精率、孵化率等显著低于正常豆粕日粮(P<0.05),而考虑综合因素日粮中的豆粕含量降低8个百分点的第1组,与正常豆粕日粮相比,差异不显著(P>0.05),而且能降低饲料成本,可以提高蛋鸡养殖效益,具有实际意义。