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1.
Effects of feeding lycopene isomers to laying hens on egg qualities such as lycopene concentration and color of the yolk were investigated. Firstly, to evaluate the dietary transfer of lycopene to egg yolk, (all‐E)‐lycopene–rich diets (lycopene content, 100, 200, or 300 mg/kg diet) were fed to hens for 21 days. Lycopene in egg yolk could be detected after 4 days or more from the start of feeding, and the lycopene concentration increased according to the feed amount and period. Even though most of the dietary lycopene was the all‐E‐isomer, more than 65% of lycopene in egg yolk was present as Z‐isomers. Thus, the effect of lycopene Z‐isomer content in the diet (lycopene content, 200 mg/kg diet; lycopene Z‐isomer content, 35.1% or 61.3%) on egg qualities was investigated. As the Z‐isomer content increased, the lycopene concentration in the egg yolk increased, for example, when fed a diet rich in Z‐isomers (61.3%), the lycopene concentration in the egg yolk was approximately three times higher than when fed the (all‐E)‐lycopene–rich diet for 21 days. The results indicated that Z‐isomers of lycopene had higher bioavailability and/or higher transfer efficiency to the egg yolk than the all‐E‐isomer.  相似文献   

2.
1. The effects of tomato powder supplementation on performance, egg quality, serum and egg yolk carotenoids, vitamins and malondialdehyde (MDA) concentrations in were investigated in laying hens in mid-lay.

2. A total of 90 laying hens, 49 weeks old, were divided into 3 groups consisting of 6 replicate cages, 5 birds per cage. Birds were randomly fed on one of three diets: basal diet and basal diet added with 5 or 10?g tomato powder per kg diet.

3. As tomato powder concentration increased, there were linear increases in feed intake, egg production, egg weight and yolk colour and a linear decrease in feed conversion. Shell weight, shell thickness and Haugh unit remained unchanged in response to dietary treatments.

4. Concentrations of serum and egg yolk lycopene, β-carotene, lutein and vitamin A increased for both diets including tomato powder, whereas MDA decreased linearly with increasing supplemental tomato powder concentration.

5. Tomato powder supplementation increased egg production persistency and increased carotenoids and vitamin A contents in egg yolk, accompanied by reduced yolk lipid peroxidation.  相似文献   

3.
The present study was conducted to investigate the effect of dietary Rhodobacter capsulatus on lipid fractions and egg‐yolk fatty acid composition in laying hens. Thirty‐six laying hens (30 weeks old) were randomly assigned into two dietary groups fed diets with (0.04%) or without (control) R. capsulatus for a 60‐day feeding trial. Dietary R. capsulatus decreased (p < 0.05) serum and hepatic cholesterol and increased (p < 0.05) the excreta cholesterol, and resultant lower (p < 0.05) cholesterol contents in egg yolk. The concentration of polyunsaturated fatty acids (PUFA) and ratio to saturated fatty acids in egg yolk was improved (p < 0.05) by dietary R. capsulatus. The concentration of hepatic bile acid was increased (p < 0.05) and excreta bile acid was decreased (p < 0.01) in the laying hens fed R. capsulatus diet. The incorporation of 1‐14C‐palmitic acid into hepatic lipids and lipid fractions was increased (p < 0.05) in laying hens fed R. capsulatus diet. Moreover, dietary R. capsulatus did not appear to cause any adverse effects on laying hen performances. Therefore, dietary supplementation of R. capsulatus in layer diets may be a feasible means of producing eggs with lower cholesterol and higher PUFA contents for health conscious consumers.  相似文献   

4.
叶黄素对蛋鸡应用效果的研究   总被引：8，自引：0，他引：8  
将144只52周龄绿壳商品产蛋鸡随机分为6组,各组在相同日粮基础上分别添加0、20、40、60、80、100mg/kg叶黄素,探讨叶黄素在蛋黄中的沉积规律以及对蛋黄色泽和蛋鸡生产性能的影响。结果说明,蛋黄中叶黄素的含量随日粮中叶黄素添加水平的增加而提高,最大沉积量达1.09mg/60g,是对照组0.23mg/60g的近5倍;日粮中叶黄素能显著(P<0.05)提高蛋黄的罗氏等级(RCF),降低亮值(L),提高红值(a),对黄值(b)无显著影响(P>0.05);日粮中添加高水平叶黄素对蛋鸡生产性能无显著影响(P>0.05)。  相似文献   

5.
蛋鸡小麦型日粮中添加叶黄素对鸡蛋品质的影响   总被引：1，自引：0，他引：1  
将360只48周龄“尼克红”蛋鸡随机分为5组,每组设3个重复,每个重复24只。试验1组为玉米基础日粮组,试验2组为小麦型基础日粮组（0．10％酶制剂组）,试验3组为0．10％酶制剂组＋0．5％叶黄素添加剂,试验4组为0．10％酶制剂组＋1．0％叶黄素添加剂,试验5组为0．10％酶制剂组＋1．5％叶黄素添加剂。预试期7天,试验期21天。结果表明,添加1．5％的叶黄素添加剂可以显著改善鸡蛋的蛋黄颜色。与小麦对照组相比,蛋黄颜色提高了188．33%（P〈0．05）。与玉米基础日粮组相比,日粮添加1．5%叶黄素添加剂组鸡蛋蛋黄颜色提高了0．82％,但差异不显著（P〉0．05）,添加叶黄素添加剂对鸡蛋的蛋重、蛋比重、蛋形指数影响不大。  相似文献   

6.
试验旨在探究虾青素和维生素B2在日粮中的添加量对鸡蛋品质的影响。选择1200只体重相近、健康的45周龄海兰褐蛋鸡,随机分成5组,每组4个重复,每个重复60只鸡。对照组蛋鸡饲喂基础日粮,试验Ⅰ、Ⅱ、Ⅲ、Ⅳ组蛋鸡饲喂固定比例的基础日粮和0.25%虾青素,混合不同含量的维生素B2(5.0、8.0、11.0、14.0 mg/kg)。预试期1周和正式试验期4周,预试期各组蛋鸡均饲喂基础日粮,正式试验期分别投放上面试验Ⅰ、Ⅱ、Ⅲ、Ⅳ组的配比的饲料。结果表明,试验组蛋黄颜色、哈夫单位均显著高于对照组(P<0.05)。试验Ⅱ、Ⅲ、Ⅳ组鸡蛋粗脂肪含量显著低于对照组(P<0.05)。试验组鸡蛋平均蛋重、蛋壳厚度、蛋壳强度、蛋比重与对照组相比有增大的趋势。试验表明,日粮添加虾青素和维生素B2能提高蛋品质,添加0.25%虾青素和14.0 mg/kg维生素B2效果最好。  相似文献   

7.
Grain from transgenic corn line TC1507 (Herculex* I) from Pioneer Hi-Bred International Inc. and Dow AgroSciences LLC, which expresses the Cry1F protein from Bacillus thuringiensis to provide protection from lepidopteran pests of corn, was compared with its isoline equivalent and 2 conventional corn strains in a 16-wk laying hen feeding trial. Egg production and production efficiency of hens fed the diet formulated with transgenic grain TC1507 were similar to those of hens fed diets formulated with isoline or nontransgenic conventional corns. Hens fed TC1507 had similar egg qualities as those fed nontransgenic grain diets. Diet × phase interactions were noted for Haugh unit and Roche color fan score. Hens fed conventional corn 2 had a poorer Haugh unit score compared with hens fed the other 3 diets. Conventional corn 1 had greater levels of xanthophylls compared with the other corn treatments, resulting in increased Roche color fan score for eggs produced by hens fed this diet. Overall, hens fed the transgenic Herculex* I corn grain containing the Cry1F protein performed as well as hens fed the isoline equivalent of Herculex* I and hens fed the conventional corn grains.  相似文献   

8.
Effects of defatted microalgae (DFA) on fatty acid composition of eggs and tissues of hens have not been well studied. This experiment was to determine how low concentrations of supplemental DFA in the presence or absence of flaxseed oil (FO) altered fatty acid profiles of egg yolk, liver, adipose tissue, and plasma of layers. A total of 60 Shaver Leghorn layer hens (individually caged, 20-wk old) were allotted into 6 groups (n = 10) and fed a corn/soybean meal basal diet containing 0, 3, or 5% DFA and 0 (1.5% corn oil, CO) or 1.5% FO for 6 wk. BW, ADFI, egg production rate, and egg component weights were not affected by any of the dietary treatments at various time points, but egg yolk color was changed (P < 0.05) with increasing concentrations of DFA. The concentration of n-3 fatty acids in egg yolk and plasma were elevated by FO up to 9-fold (P < 0.05) starting at wk 1 or 2, and 39 to 83% (P < 0.05) by DFA. Supplemental DFA improved (P < 0.05) n-6/n-3 fatty acid ratios in egg yolk and plasma from 13 to 23 and 7 to 13, respectively, only in hens fed diets without FO. Fatty acid profiles of liver and adipose tissue (at wk 6) displayed responses to supplemental DFA and FO similar to those of egg yolk or plasma. In conclusion, supplemental 3 or 5% DFA caused moderate enrichments of n-3 fatty acids and decreased the n6/n3 fatty acid ratios of egg yolk and tissues in hens fed diets without FO.  相似文献   

9.
The purpose of this trial was to investigate the effects of adding graded levels of dehydrated, whole-cell microalgae (All-G-RichTM, Alltech Inc.) in layer diets on the performance, egg and shell quality, yolk color, oxidative stability, and fatty-acid concentration of eggs. Six replicate groups of 5 Hy-Line W-36 laying hens were assigned to each of 4 dietary treatments. Treatments consisted of feeding a corn-soybean meal control diet alone or supplemented with 1.0, 2.0, or 3.0% All-G-RichTM during a 32-wk production period. Fatty-acid content of egg yolk was analyzed after feeding the experimental diets for 4 wk. The docosahexaenoic acid (DHA) content in egg yolk was linearly increased (P < 0.01) with increasing levels of algae in the diet. There was no effect of dietary treatments on production performance of layers in the entire trial period. Egg weight and eggshell quality were not affected by dietary treatments. Supplements of 2 or 3% All-G-RichTM significantly increased redness (a*) and decreased lightness (L) of egg yolk. Yolk fatty-acid oxidation, as measured by thiobarbituric acid reactive substances (TBARS), was not affected by treatments in eggs stored up to 30 d at 4°C. Based on these data, adding All-G-RichTM in layer diets can produce DHA-enriched eggs with no negative impact on egg quality.  相似文献   

10.
本试验以海兰褐蛋鸡为研究对象,探索苜蓿皂苷对蛋品质及胆固醇含量的影响。将480只23周龄海兰褐蛋鸡随机分为8组,每组5个重复进行试验,对照组(基础日粮),苜蓿草粉组(5%苜蓿草粉),处理I~VI组在基础日粮中分别添加500,1 000,1 500,2 000,2 500,3 000mg·kg-1苜蓿皂甙(总甙含量34%),于试验第1,15,30,45天时测定蛋重、蛋形指数、蛋壳厚度、蛋壳相对重、蛋黄指数、蛋黄颜色和蛋黄胆固醇含量。结果表明:苜蓿皂甙和苜蓿草粉对常规蛋品指标无显著影响;苜蓿草粉对蛋黄颜色有明显提高作用(P0.05),皂甙处理组蛋黄颜色较对照组有所降低。苜蓿草粉处理下蛋黄颜色均高于对照组和处理组,且在15天和45天时显著高于所有处理组;苜蓿皂甙对蛋黄胆固醇浓度和鸡蛋胆固醇含量无显著影响;但是,在15,30和45天时,处理组与苜蓿草粉组的蛋黄胆固醇浓度较对照组有所降低但差异不显著,在15天和45天时,处理组与苜蓿草粉组的鸡蛋胆固醇浓度较对照组有所降低但不显著。因此苜蓿皂甙对常规蛋品指标没有影响,对降低鸡蛋中胆固醇浓度与胆固醇含量没有显著作用。  相似文献   

11.
1. The effects of n?3 polyunsaturated fatty acids (PUFA) and conjugated linoleic acids (CLA) on genes involved in carnitine homeostasis were compared in laying hens. Three groups of laying hens were fed on a control diet or a diet with either 3% of fish oil or CLA for 4 weeks.

2. Feed intake and egg production rate did not differ between the three groups. Diets with fish oil or CLA had only a weak effect on mRNA levels of PPARα target genes (ACO, CPT-I) in the liver and did not influence mRNA concentrations of the most important carnitine transporter OCTN2, enzymes of involved in carnitine synthesis (TMLD, TMABA-DH, BBD) or concentrations of carnitine in plasma, liver and total egg contents.

3. Hens fed the CLA diet had lower concentrations of free and total carnitine in egg yolk but higher concentrations of carnitine in albumen than control hens (P? 4. In conclusion, the study showed that feeding fish oil or CLA causes only a weak activation of PPARα in tissues of laying hens that probably explained the lack of effect on carnitine homeostasis. The results contrast with those in humans and mice that show a significant effect of synthetic PPARα agonists on carnitine homeostasis in humans and mice.  相似文献   

12.
The aim of the study was to contribute to the discussion of overdosing vitamin E in laying hens. A total of 45 laying hens, divided into 5 groups were fed diets supplemented with either 0; 100; 1000; 10,000 or 20,000 mg dl-alpha-tocopheryl acetate/kg diet over a period of 10 weeks. Concentrations of vitamins A and E were measured in plasma, various tissues and egg yolk. Furthermore egg yolk colour and some carotinoids were measured in egg yolks. None of the vitamin E doses significantly influenced performance of the hens. As expected, vitamin E concentration in plasma, all tissue samples and egg yolk was significantly increased with increasing tocopherol content in the diet. The egg yolk showed the highest vitamin E concentration, followed by liver and muscles. Feeding 1000 mg alpha-tocopheryl acetate per kg diet resulted in an increase of vitamin A concentration in the liver. Very high doses (10,000 and 20,000 mg/kg diet) significantly decreased retinol concentration in the liver and egg yolk, as well as carotinoid concentration in the egg yolk. The lower carotinoid concentration in egg yolk resulted in a decreased intensity of egg yolk colour. A prooxidative and/or competitive effect of very high doses of vitamin E with other fat soluble substances has been discussed.  相似文献   

13.
The objective of the present study was to find the effect of cumin seed oil (CSO, Cuminum cyminum L.) on the laying performance, ovarian follicular development and immune response in laying hens under high ambient temperature. A total of 162 Boven hens were randomly divided into three treatments and were fed, ad libitum, diets containing 0 (control), 250 or 500 g CSO per ton from 24 to 30 weeks of age. The experiment was done during summer season where the average temperate was 30 to 36°C. Feed intake and egg mass were recorded. Egg quality characteristics and egg‐yolk cholesterol content were evaluated. Ovary and oviduct samples were immediately weighted, and ovarian follicles were classified. Plasma total protein, albumin, total cholesterol, LDL‐cholesterol, HDL‐cholesterol glutamic oxalacetic transaminase (GOT), and glutamate pyruvate transaminase (GPT) were measured. Yolk width, yolk weight, yolk colour, shell weight and shell thickness were increased by feeding CSO. Egg production rate was not affected. However, dietary 500 g CSO per ton had a significantly positive impact on egg weight in comparison with control. The FCR was improved by feeding 500 g CSO per ton; however, feed intake and egg mass were not affected by CSO treatments. Plasma GOT, GPT and triglycerides were significantly decreased, while, plasma HDL‐cholesterol was significantly (p < .05) increased due to CSO treatments. Yolk cholesterol content was significantly decreased; however, liver malondialdehyde (MDA) concentration was insignificantly decreased due to dietary treatments. Interestingly, the inclusion of CSO in laying hens’ diets improved the antibody titres against Newcastle disease (ND, p < .05) and against avian influenza H9N1 (p > .05) when compared with the control diet. It could be concluded that dietary inclusion of CSO improved egg weight, FCR, yolk and shell quality characteristics and did not have a negative effect on the reproductive morphology parameters in laying hens.  相似文献   

14.
The aim of this study was to evaluate the effects of dietary soluble non-starch polysaccharide (sNSP) content and xylanase supplementation on production performance, egg quality parameters, and nutrient digestibility in Hy-line Brown layers from 25 to 32 wk of age. A total of 144 Hy-line Brown laying hens (25 wk of age) were randomly allocated to 1 of 4 wheat-based dietary treatments in a 2 × 2 factorial experimental design, with 36 replicates of individual hens per treatment. The diets were formulated to contain either a high or low sNSP level (at 13.3 or 10.8 g/kg) and were supplemented with either 0 or 12,000 BXU/kg exogenous xylanase. Birds were fed these treatment diets for an 8-wk period, and hen production performance, including daily egg production, average egg weight, daily egg mass, feed conversion ratio and proportion of dirty and abnormal eggs were measured at bird age 25 to 28 wk and 29 to 32 wk. An interaction between sNSP content of the diet and xylanase supplementation was observed on daily egg production from 25 to 28 wk of age (P = 0.018); birds fed the high sNSP diet without xylanase had lower egg production than those fed any other treatment. An interaction between the 2 dietary factors was also observed on hen weight gain at 29 to 32 wk of age (P = 0.014), with birds fed the low sNSP diet with 12,000 BXU/kg xylanase presenting greater weight gain compared to those fed the high sNSP diet with 12,000 BXU/kg xylanase. Feed intake at 29 to 32 wk of age was reduced by xylanase supplementation (P = 0.047). Xylanase supplementation also increased yolk colour score at both 28 and 32 wk of age, and decreased yolk weight at 32 wk of age (P = 0.014, 0.037 and 0.013, respectively). Birds fed the low sNSP diet presented lower protein digestibility (P = 0.024) than those fed the high sNSP diet. Additionally, birds fed high sNSP presented higher shell reflectivity at both 28 and 32 wk of age (P = 0.05 and 0.036, respectively). The influence of duration of feeding the treatment diets on egg quality was also determined. It was observed that egg weight, yolk weight and yolk colour score consistently increased over time, regardless of experimental treatment effects. In contrast, Haugh Unit and albumen height significantly decreased throughout the study period in all treatments, although this was less pronounced in hens fed the treatment with high sNSP and no supplemental xylanase. A reduction in shell breaking strength over time was observed only in hens fed the treatments without xylanase addition, and shell thickness was improved over time only in birds fed the low sNSP diet with xylanase. The impacts of the dietary treatments were largely inconsistent in this study, so a solid conclusion cannot be drawn. However, these findings do indicate that dietary NSP level influences layer production performance, and thus should be considered when formulating laying hen diets. It also proved that further research is warranted into how to optimize the benefits of xylanase application in laying hens.  相似文献   

15.
本试验旨在研究不同干燥工艺加工的苜蓿粗多糖对蛋鸡生产性能、蛋品质、器官指数和血清、鸡蛋中抗体含量的影响。选取54只38周龄的京红1号产蛋鸡,随机分为3组,每组18个重复,每个重复1只鸡,单笼饲养。对照组饲喂玉米-豆粕型基础饲粮,试验组分别饲喂在基础饲粮中添加1 000 mg/kg微波真空干燥所得苜蓿粗多糖1(ACPS1)和减压烘干干燥所得苜蓿粗多糖2(ACPS2)。试验期65 d。结果表明:与对照组相比,1)在试验第28~36天,ACPS1组蛋鸡的平均日采食量显著增加(P0.05);饲粮中添加不同干燥工艺加工的苜蓿粗多糖对蛋鸡各阶段的产蛋率和平均日增重均无显著影响(P0.05)。2)试验第63天,ACPS1组蛋鸡的蛋黄颜色显著增加(P0.05);试验第30天,饲粮中添加不同干燥工艺加工的苜蓿粗多糖对蛋鸡的蛋壳颜色、蛋黄颜色、蛋白高度和哈氏单位均无显著影响(P0.05)。3)ACPS1组蛋鸡的肝脏指数显著增加(P0.05),ACPS2组的卵巢指数显著降低(P0.05);且ACPS1组的肝脏指数和卵巢指数均显著高于ACPS2组(P0.05)。饲粮中添加不同干燥工艺加工的苜蓿粗多糖对蛋鸡的脾脏指数和输卵管指数均无显著影响(P0.05)。4)ACPS1组蛋鸡血清中免疫球蛋白Y(Ig Y)含量显著增加(P0.05),ACPS1和ACPS2组血清中新城疫抗体(NDV-Ab)、蛋黄中NDV-Ab、蛋清中免疫球蛋白A(Ig A)和免疫球蛋白M(Ig M)含量均显著增加(P0.05);且ACPS1组蛋黄中NDV-Ab、蛋清中Ig A和Ig M含量均显著高于ACPS2组(P0.05)。以上结果表明,饲粮中添加苜蓿粗多糖能加深蛋鸡的蛋黄颜色,增加血清和鸡蛋中的抗体含量,且ACPS1的效果更佳。  相似文献   

16.
本试验旨在研究夏季高温环境下在饲粮中添加苜蓿多糖对蛋鸡生产性能及蛋品质的影响。将540只156日龄海兰褐蛋鸡随机分成6组,每组6个重复,每个重复15只鸡。对照组饲喂基础饲粮,试验组分别饲喂在基础饲粮中添加250、500、1 000、2 000和4 000 mg/kg苜蓿多糖的试验饲粮。试验期为6周。结果显示:与对照组相比,1)饲粮中添加不同水平苜蓿多糖对平均蛋重、平均日采食量、不合格蛋率和死淘率均无显著影响(P0.05),而添加500、1 000和4 000 mg/kg苜蓿多糖显著提高了蛋鸡的产蛋率(P0.05),添加500、1 000、2 000和4 000 mg/kg苜蓿多糖显著降低了料蛋比(P0.05)。2)饲粮中添加不同水平苜蓿多糖对蛋白高度和哈夫单位均无显著影响(P0.05);250 mg/kg苜蓿多糖添加组第4和6周末的蛋黄颜色显著提高(P0.05);500 mg/kg苜蓿多糖添加组第6周末的蛋形指数显著降低(P0.05),第1、4和6周末的蛋黄颜色显著提高(P0.05);1 000 mg/kg苜蓿多糖添加组第4和6周末的蛋壳颜色显著加深(P0.05),第1、2和4周末的蛋壳强度和蛋壳厚度显著提高(P0.05),第1和6周末的蛋形指数显著降低(P0.05),第1、2、4和6周末的蛋黄颜色显著提高(P0.05);2 000 mg/kg苜蓿多糖添加组第1和4周末的蛋壳厚度显著提高(P0.05),第6周末的蛋形指数显著降低(P0.05),第1、4和6周末的蛋黄颜色显著提高(P0.05);4 000 mg/kg苜蓿多糖添加组第4周末的蛋壳颜色显著加深(P0.05)且蛋壳强度显著提高(P0.05),第1和4周末的蛋壳厚度显著提高(P0.05),第6周末的蛋形指数显著降低(P0.05),第1、4和6周末的蛋黄颜色显著提高(P0.05)。结果表明,夏季高温环境下,在饲粮中添加适量的苜蓿多糖可以有效缓解蛋鸡的热应激,提高蛋鸡的生产性能,改善蛋品质,且适宜添加量为1 000 mg/kg。  相似文献   

17.
1. A study was conducted to determine the effects of dried broccoli floret (DBF) on egg production parameters, egg quality and apparent nutrient digestibility of laying hens. It was hypothesised that feeding DBF can improve egg quality without adversely affecting layer performance.2. Seventy-two White Leghorn layers aged 62 weeks were randomly allotted to 4 dietary treatments (6 cage replicates with 3 hens each) and fed diets containing 0, 40, 80 and 120 g/kg DBF in feed for 56 d.3. Inclusion of DBF had no effect on feed intake, egg production, feed conversion ratio or egg components. However, egg weight increased (linear effect, P < 0.05) as the level of DBF in the diet increased. Egg breakage strength, eggshell strength and Haugh unit were not influenced by dietary treatments. Egg yolk colour (quadratic effect, P = 0.002) and α-tocopherol concentration (quadratic effect, P < 0.0001) improved as a result of DBF inclusion. Egg yolk cholesterol concentration was not altered by DBF inclusion. Apparent total tract nutrient (dry matter, organic matter and crude protein) digestibility coefficients decreased (linear effect, P < 0.05) as the level of DBF increased.4. Feeding DBF to layers up to 120 g/kg of the diet had no negative effects on feed intake, egg production and feed efficiency and improved egg yolk colour and α-tocopherol concentration. However, total tract nutrient digestibility coefficients were negatively decreased as a result of DBF inclusion.  相似文献   

18.
An experiment was carried out in which laying hens were fed diets containing about 30 per cent tallow at three protein levels. Productive performances of hens on these diets were compared with those of hens fed either a diet containing 15 per cent arachis oil, a diet containing 15 per cent sucrose or a conventional cereal‐based control diet.

It was found that the best performance was obtained with hens fed the control diet. Gross energetic efficiency of egg production was slightly lower in the birds fed the diets containing arachis or sucrose. It appeared that the lower efficiency was due to the higher mean body weight of birds on these diets. Egg size was significantly increased by feeding the diet containing arachis oil.

Performance of hens given diets containing tallow was unsatisfactory. For each diet egg production was significantly less than that recorded for the control diet and the gross energetic efficiency of egg production was much lower than that on the control diet.  相似文献   


19.
为研究日粮中添加枸杞渣对蛋鸡生产性能与蛋品质的影响,以240只23周龄蛋鸡为试验对象,将蛋鸡随机分成4组,每组60只。Ⅰ组为对照组,饲喂基础日粮;Ⅱ、Ⅲ、Ⅳ组为试验组,分别在基础日粮中添加2.5%、5.0%、7.5%枸杞渣。结果显示:与对照组相比,Ⅲ、Ⅳ组平均产蛋率分别提高了1.85%和3.99%,Ⅱ、Ⅲ、Ⅳ组日采食量均极显著降低(P<0.01),Ⅲ组料蛋比显著降低(P<0.05),Ⅳ组料蛋比极显著降低于Ⅰ、Ⅱ其他各组(P<0.01)。Ⅱ、Ⅲ、Ⅳ组蛋黄颜色极显著提高(P<0.01),Ⅱ、Ⅲ组蛋重显著下降(P<0.05),试验组蛋壳强度、蛋白高度、哈氏单位和蛋壳厚度与对照组无显著差异(P>0.05)。结果表明,日粮中添加5.0%、7.5%枸杞渣可以提高蛋鸡的产蛋率,并能降低料蛋比;日粮中添加2.5%、5.0%枸杞渣即可显著降低蛋重,改善蛋黄颜色。  相似文献   

20.
本试验旨在研究日粮中添加辣诺素（辣木和诺丽果的提取物）对蛋鸡生产性能及蛋品质的影响。将产蛋高峰期（22周龄）的海兰褐商品蛋鸡540只随机分为6个处理,每个处理6个重复,每个重复15只鸡。负对照组（NC）饲喂基础日粮,正对照组（PC）饲喂添加50 mg/kg杆菌肽锌的基础日粮,4个试验组分别饲喂添加0.25、0.50、0.75和1.00 g/kg辣诺素（LNS）的基础日粮。试验期24周。结果显示：①日粮处理对蛋鸡试验前期和后期生产性能均无显著影响（P>0.05）,试验后期添加0.50和0.75 g/kg辣诺素有改善料蛋比的趋势（P=0.087）;日粮处理对试验前期和后期鸡蛋蛋形指数、蛋壳强度、蛋壳厚度、蛋黄重和哈氏单位均无显著影响（P>0.05）,但日粮中添加杆菌肽锌和辣诺素有提高蛋壳强度的趋势（P=0.062）,其中以添加0.75g/kg辣诺素组鸡蛋强度最高。②与正、负对照组相比,添加辣诺素显著增加了生蛋黄和熟蛋黄的罗氏蛋黄色比率（P<0.05）,显著降低了蛋黄胆固醇的含量（0.25 LNS组除外）（P<0.05）。③与负对照组相比,添加0.50 g/kg辣诺素显著提高了鸡蛋总黄酮、二十二碳六烯酸（DHA）、卵磷脂、亚麻酸和亚油酸含量（P<0.05）。综合以上试验结果,辣诺素作为饲料添加剂具有提高鸡蛋营养品质的功能,考虑到添加成本,产蛋鸡日粮中添加0.25~0.50 g/kg为宜。  相似文献   

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