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| Registros recuperados: 28 | |
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| Miyoshi, Syunzou; Inoue, Keiichi; Luc, Kieu Minh; Kuchida, Keigo; Mitsumoto, Takatsugu; 三好, 俊三; 井上, 慶一; ルック, キィウ ミン; 口田, 圭吾; 光本, 孝次. |
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Palavras-chave: Egg composition; Shell quality; Clutch position; Laying hen; 卵構成; 卵殻質; クラッチポジション; 産卵鶏. |
| Ano: 1997 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/453 |
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| Upadhaya,SD; Lee,BR; Park,JW; Kim,IH. |
| ABSTRACT In total, 216 Hy-Line brown laying hens (40-week-old), were used in a 5-week experiment to evaluate the effects of ionized or chelated water-soluble mineral mixture supplementation on live performance, nutrient digestibility, blood characteristics, egg quality, and excreta microbiota. Layers were randomly assigned to one of three dietary treatments with 12 replicates of six adjacent cages each. The dietary treatments consisted of: 1) CON (basal diet + normal tap water), 2) T1 (CON+0.5% ionized mineral mixture in tap water, pH 3.0); and 3) T2 (CON+ 0.5% chelated mineral mixture in tap water, pH 3.0). Egg production tended to increase in week 1, week 3 and week 4 in the birds supplemented with T1 and T2 diet compared with CON. Moreover, the dietary... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ionized mineral mixture; Laying hen; Chelated mineral mixture. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000200239 |
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| Zang,H; Zhang,K; Ding,X; Bai,S; Hernández,JM; Yao,B. |
| The experiment was conducted to evaluate the effects of different dietary vitamin combinations on the egg quality and vitamin concentrations in the eggs of commercial laying hens. A total of 1,800 25-week-old Lohman pink-shell hens were randomly assigned to four dietary vitamin treatments as follows: NRC(1994) level, NRC (1994) level with Hy.D® (25-hydroxy-cholecalciferol), Local level (current average industry level in China) and OVN® level (optimum vitamin nutrition level), with 10 replicates per treatment and 45 layers per replicate. Hens were housed in commercial laying cages with three birds per cage and given ad libitum access to feed. Results showed the hens that received the fortified vitamin levels in the OVN® treatment had a significantly... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Egg quality; Hy.D®; Laying hen; OVN®; Vitamin deposition. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2011000300005 |
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| Dogan,S Canogullari; Baylan,M; Erdoğan,Z; Küçükgül,A; Bulancak,A. |
| ABSTRACT The current study was conducted to determine the effects of the licorice root (Glycyrrhriza glabra) in laying hens diets on performance, egg cholesterol, some plasma parameters and antioxidant capacity. One hundred, 40-week old laying hens were divided into four groups, each group consisted of 25 hens and were placed in individual cages. The mean of the initial body weight of laying hens was 1829.18±9.595 g. Commercial laying hen diet was supplemented with 0, 0.5, 1.0 and 2.0% levels of licorice root powder and four different dietary groups were formed. From the experimental findings, it was ascertained that the licorice root supplementation had no significant effect on egg weight and feed conversion ratio (p>0.05), but feed consumption... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antioxidant capacity; Egg cholesterol; Glycyrrhriza glabra; Laying hen; Performance; Some plasma parameters. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2018000400699 |
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| Nawab,A; Li,G; Liu,W; Lan,R; Wu,J; Zhao,Y; Kang,K; Kieser,B; Sun,C; Tang,S; Xiao,M; An,L. |
| ABSTRACT Heat stress induces oxidative stress, and reduces body antioxidant metabolite levels, which can affect poultry production performance. Dietary antioxidants protect birds against the adverse effects of heat stress. The effects of increasing concentrations of dietary curcumin on the antioxidant parameters of layers maintained under high-temperature conditions for nine weeks were evaluated. Roman laying hens (n = 336, 22 weeks old, 1420 g BW) were divided into three treatment groups. The first group served as a thermoneutral control (kept at 25 ± 1 °C). The second group was exposed to high temperatures (32 ± 1 °C, 6 h/d), given a basal diet. The third group was further divided into five treatment groups (100, 150, 200, 250, 300 mg/kg Curcumin) fed a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antioxidant; Curcumin; Heat stress; Laying hen; Oxidative damage. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2019000200337 |
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| Shaoxia,PU; Changwei,QU; Zhi,LI; Yansen,LI; ChunMei,LI. |
| Abstract In order to investigate the expression levels of nerve growth factor (NGF) and its receptors (TrkA and p75) in prehierarchical follicles and oviducts of hens, five 130-day-old laying hens were examined by immunohistochemistry and RT-PCR analysis. NGF and its receptors were expressed in theca cells and granulosa cells of prehierarchical follicles, and they were also expressed in the epithelial cells of oviducts. The expression of the genes NGF, TrkA and p75 were significantly different in prehierarchical follicles (p<0.05 or p<0.01), and NGF and TrkA gene expression was significantly different in different parts of oviduct (p<0.05 or p<0.01). The expression of NGF and p75 mRNA levels was highest in large white follicle (LWF), as well as... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: NGF; TrkA; P75; Prehierarchical follicle; Oviduct; Laying hen. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000100187 |
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| Preis,IS; Fiúza,ATL; Silva,CC; Braga,JFV; Couto,RM; Martins,NR da S; Ecco,R. |
| Seventy-eight chickens from a very high poultry density (approximately eight million) region and twelve backyard chickens from neighboring areas were analyzed by histopathology and additional techniques for the presence of the infectious laryngotracheitis virus. The virus distribution was determined in different tissues using immunohistochemistry (IHC) and polymerase chain reaction (PCR). The disease was histopathologically diagnosed in 41.0% (32/78) of the commercial layers. Lesions were mainly characterized by syncytial cells with eosinophilic intranuclear inclusion body formed from the hyperplastic epithelium of the upper respiratory tract, primary and secondary bronchi, and conjunctiva. IHC showed 70% (21/30) positive signal in the larynx/trachea and,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Avian infectious laryngotracheitis; Conventional PCR; Histopathology; Immunohistochemistry; Laying hen. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2014000400004 |
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| Şahan,Z; Kutay,H; Çeli̇k,L. |
| ABSTRACT In the present study, seventy-two 30-week-old laying hens (Brown Hisex) were separated into two groups (control and treatment) and fed with a standard layer diet. In the treatment group the amount of effective microorganism (EM) added to the drinking water is equal to1000 ppm EM dose. Throughout the 8-week study period, 16 h thermoneutral (20-22 ºC) and 8 h hot (35-37 ºC) environmental temperature regime was applied daily. The results indicated that EM supplementation affected performance and some egg quality characteristics of layers exposed high environmental temperature. Feed intake and conversion ratio, yolk index, albumen index, yolk colour b, Haugh unit were decreased by supplemental EM. Serum glucose, cholesterol, triglycerides, calcium,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Laying hen; Effective microorganisms; High temperature; Performance; Egg production and quality. |
| Ano: 2021 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2021000100306 |
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| Anaeto,M; Adighibe,LC. |
| The effect of replacing maize with graded levels of cassava root meal (CRM) as energy source in the diet of laying hens was evaluated during the eight weeks of feeding experiment on performance and cost benefits on layers. Forty-five Nera black laying hens of 24 weeks of age were allocated to five dietary treatments, with nine birds per treatment in a completely randomized design. CRM was used to formulate the diets at 0, 25, 50, 75, and 100%. The result showed that the feed intake of birds in the control group was significantly (p<0.05) different from those fed the CRM diets. The average weight gain of layers receiving up to 50% CRM was similar to the control birds, but significantly different from layers fed 75 and 100% CRM. No mortality was recorded.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cassava root meal; Cost benefit; Laying hen; Performance. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2011000200010 |
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| Al-Qazzaz,Mohammed Farooq Abdulhameed; Ismail,Dahlan; Akit,Henny; Idris,Lokman Hakim. |
| ABSTRACT This study was conducted to evaluate the effect of black soldier fly larvae (BSFL) as a source of protein in layer diets on product performance, egg quality, hatchability, fertility, and sensory characteristics of eggs. The BSFL contained a high percentage of protein (559.9 g kg−1), metabolizable energy (696.3 kcal kg−1), crude fat (18.6 g kg−1), and dry matter (178 g kg−1) and a good balance of amino acids. A total of 54 Arabic strain hens at nine months of age were mixed with nine cocks at 12 months old; all were divided into three treatments. The diets were formulated based on three levels of energy-to-protein ratio: 155, 140, and 170. The BSFL meal was added at 0, 50, and 10 g kg−1 respectively. The results showed that feed intake, weight... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Black soldier fly larvae; Energy to protein ratio; Laying hen. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982016000900518 |
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| Registros recuperados: 28 | |
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