Journal of Applied Poultry Research最新文献

{"title":"Effects of methionine supplement sources and crude protein on Ross 708 male broiler performance and carcass yield","authors":"D.R. Boontarue ,&nbsp;F.L.S. Castro ,&nbsp;C.M. Poholsky ,&nbsp;B.S. Liebross ,&nbsp;J.W. Boney","doi":"10.1016/j.japr.2024.100478","DOIUrl":"10.1016/j.japr.2024.100478","url":null,"abstract":"<div><div>This 42 d experiment investigated the influence of crude protein (<strong>CP</strong>) levels, methionine (<strong>Met</strong>) supplement sources, and their interaction on growth performance, processing measurements, footpad lesion scores (<strong>FLS</strong>), and litter moisture. A total of 3,072 Ross 708 by-product males received diets varying in CP (Standard [SCP] or Reduced 2% [RCP]) and Met sources (None, Methionine hydroxy analog [<strong>MHA</strong>], or 65% DL-Met [65DLM]). Treatments were arranged in a 2 (CP) x 3 (Met sources) factorial in a randomized complete block design. Each treatment was fed to 16 replicate floor pens with 32 birds/pen across a 3-phase (starter, d 1–10; grower, d 11–24; finisher, d 25–42) feeding program. Performance was measured during d 1 to 10, 1 to 24, and 1 to 42. On d 24 and 42, litter moisture was determined, and 3 birds/pen were selected for FLS. On d 42, 3 birds were selected for processing. Regardless of Met source, RCP-fed birds showed reduced performance compared to birds fed SCP treatments. Birds fed SCP diets increased litter moisture when compared to birds fed RCP diets. Likewise, birds fed either MHA or 65DLM had higher litter moisture content than birds provided a diet with no Met supplementation. On d 42, 90% of FLS across all treatments had a score of “0”. Breast weight was highest when 65DLM was in SCP diets and reduced when MHA was in either RCP or SCP diets. This experiment indicates that 65DLM and MHA can be used interchangeably in formulation, achieving similar performance and improved breast weight with 65DLM in SCP diets.</div></div>","PeriodicalId":15240,"journal":{"name":"Journal of Applied Poultry Research","volume":"33 4","pages":"Article 100478"},"PeriodicalIF":1.6,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142421270","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of the effects of maintaining a moderate humidity (50–60%) and increased air movement on litter moisture and footpad health in a commercial broiler house","authors":"C.T. Mou,&nbsp;M. Czarick III,&nbsp;B.D. Fairchild","doi":"10.1016/j.japr.2024.100476","DOIUrl":"10.1016/j.japr.2024.100476","url":null,"abstract":"<div><div>High litter moisture (&gt;25%) strongly correlates with higher ammonia and increased footpad lesions. Although there are methods to help reduce the occurrence of high litter moisture, such as ventilation and proper drinker management, these methods need to evolve due to increasing consumer demands and more stringent animal welfare guidelines. A potentially cost-effective method may be ventilating houses to maintain a moderate RH level (60% or lower) and increasing the amount of air movement (150 ft/min) over the litter surface through circulation fans. This field study examined the possible effects of this combination on litter moisture and footpad health. The combination (TRT) had the greatest impact during the first 3 wk of a flock. The mean litter moisture was below 25% during this period in TRT houses. While litter moisture in the control (<strong>CTL</strong>) houses (no circulation fans- same RH) was 30% or greater. During the first 21 d, in 3 out of the 4 study flocks, less than 10% of birds had signs of lesions in the TRT house compared to up to 29% of birds in the CTL house. At the end of the flock, birds in the CTL house had, on average, a 23% higher rate of severe lesions than birds in the TRT house. These findings suggest moderate RH and supplemental air movement over the litter surface (150 ft/min) can benefit litter moisture control and footpad health.</div></div>","PeriodicalId":15240,"journal":{"name":"Journal of Applied Poultry Research","volume":"34 1","pages":"Article 100476"},"PeriodicalIF":1.6,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757558","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Applied research note: comparison of the locomotor activity and circadian rhythm in 3 strains of laying hens as measured by tri-axial accelerometers","authors":"J.A. Abecia ,&nbsp;C. Palacios ,&nbsp;J. Plaza ,&nbsp;J. Nieto ,&nbsp;F. Canto","doi":"10.1016/j.japr.2024.100475","DOIUrl":"10.1016/j.japr.2024.100475","url":null,"abstract":"<div><p>The objective of this study was to use tri-axial accelerometers to quantify circadian changes in the locomotor activity of 3 strains of laying hens. Animals were from either the White, Brown or Black strain of a farm that breeds free-range laying hens. Hens were fitted with commercially available sensors that record high resolution raw acceleration data, which were attached to the back of the hen by nylon harnesses and remained in place for 7 d. Separately, animals from each of the strains were allocated to an indoor hen house (density = 0.5 m²/hen), which had an artificial photoperiod (16L:8D), and an adjacent outdoor pen (4 m²). Minute-by-minute activity data values (Vector Magnitude, VM) were calculated from the activity counts of each of the 3 axes. Mean (± S.E.) activity (counts/min) of the White strain (was significantly (<em>P</em> &lt; 0.001) higher than that of the other 2 strains. Hens were quiet in the dark period of the day, and were significantly (<em>P</em> &lt; 0.001) more active in the light period. Locomotor activity differed significantly (P&lt;0.001) among strains in both the dark and the light periods. All hens exhibited a 24-h circadian rhythm in activity, and significantly different MESOR and acrophases (<em>P</em> &lt; 0.001). In conclusion, the tri-axial accelerometers tested in this study were useful for measuring locomotor activity in laying hens, and the animals adapted quickly to wearing the devices attached to harnesses. Hens from the 3 strains exhibited the same pattern in locomotor activity throughout the day, although they differed in the intensity of their activity</p></div>","PeriodicalId":15240,"journal":{"name":"Journal of Applied Poultry Research","volume":"33 4","pages":"Article 100475"},"PeriodicalIF":1.6,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1056617124000734/pdfft?md5=1e6f76c2ef379d14bdb61b79604b7d2b&pid=1-s2.0-S1056617124000734-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142243199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of light exposure during late incubation, early feeding, and litter access posthatch on the stress response and body weight gain in laying hen chicks","authors":"Catharina M.H. Broekmeulen ,&nbsp;Yamenah Gómez ,&nbsp;Sabine G. Gebhardt-Henrich ,&nbsp;Bettina Almasi ,&nbsp;Rupert M. Bruckmaier ,&nbsp;Michael J. Toscano","doi":"10.1016/j.japr.2024.100473","DOIUrl":"10.1016/j.japr.2024.100473","url":null,"abstract":"<div><div><em>In-ovo</em> sexing opens the door to on-farm hatching in the laying hen sector, but knowledge on the implications of different hatching system factors remains limited. This study addressed the influence of continuous light exposure during the last 3 d of incubation, posthatch feed and water access, and posthatch litter access on stress responsivity and body weight gain in laying hen chicks. Through a pilot experiment and two replicated experiments, we investigated the influence of these factors on physiological stress responsivity and body weight gain up to 8 wk of age. Short-term stress responsivity was evaluated by serum corticosterone and cloacal temperatures during processing procedures (e.g., sexing, sorting, vaccinating). Additionally, cumulative stress responsivity until 8 wk of age was assessed through corticosterone analysis in feather samples, and chick weights were recorded throughout. The presence of continuous lighting during the last 3 d of incubation affected stress responsivity, potentially by disrupting the circadian release of melatonin and thus corticosterone secretion. Immediate access to posthatch feed and water affected serum corticosterone levels, indicating a relationship between early feeding and stress responsivity. However, the underlying mechanisms remain unclear. Posthatch feed and water access did not have long-term effects on body weight gain, as fully deprived chicks were able to catch up within a day. Despite our study's exploratory nature, a complex relationship between stress responsivity and the hatching environment was shown, highlighting the need for future research to focus on disentangling and optimizing hatching system factors to minimize early life stress.</div></div>","PeriodicalId":15240,"journal":{"name":"Journal of Applied Poultry Research","volume":"33 4","pages":"Article 100473"},"PeriodicalIF":1.6,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142421232","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Applied Research Note: Operation of drones and autonomous vehicles in confined housing to assist in house management","authors":"W.D. Daley ,&nbsp;Colin Usher ,&nbsp;Nate Damen ,&nbsp;Brian Fairchild","doi":"10.1016/j.japr.2024.100467","DOIUrl":"10.1016/j.japr.2024.100467","url":null,"abstract":"<div><div>Poultry farmers are required by many integrators to walk their houses at least once per day to observe the birds and check environmental conditions to make timely changes to optimize bird performance and wellbeing. Houses are now on average about 54 feet wide by 575 feet long. This can take a significant amount of time for the farmer to navigate each day while paying full attention to all activities. A drone has the capability to efficiently scan the birds and environment, collect data and provide remote access to conditions in the house to guide decisions around management. In a preliminary experiment, a drone was operated in a commercial facility for 1 flock 1 d a week sometimes in concert with a ground robot in half of 1 house. An analysis based on region motion profiles was used to compare motion effects. The performance of the experimental house compared to 3 other houses on the same farm in terms of mortality, water consumption and feed conversion were not statistically different. Other experiments operating autonomous vehicles do not report significant performance impacts. This implies that drones and other autonomous vehicles might be an additional tool in the management of broiler houses providing added flexibility and capability in a time where farm labor is difficult to find and retain. Integrated systems could be more responsive to perturbations resulting in more timely management decisions that would result in better house conditions thereby improving both bird performance and wellbeing.</div></div>","PeriodicalId":15240,"journal":{"name":"Journal of Applied Poultry Research","volume":"33 4","pages":"Article 100467"},"PeriodicalIF":1.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1056617124000655/pdfft?md5=9ed75e1e5a60a3a08ea7069cb870d6b2&pid=1-s2.0-S1056617124000655-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142265156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of neem (Azadirachta indica), girawa (Vernonia amygdalina) leaves meal and garlic (Allium sativum) on performance and egg qualities of layer chickens","authors":"Minichle Yigrem ,&nbsp;Getachew Animut ,&nbsp;Yeshambel Mekuriaw","doi":"10.1016/j.japr.2024.100469","DOIUrl":"10.1016/j.japr.2024.100469","url":null,"abstract":"<div><div><em>A study was conducted to evaluate the efficacy of neem, girawa leaves meal, and garlic for layer hens on performances and egg quality parameters.</em> A total of 128 bovans brown layer hens with uniform body weight (<strong>BW</strong>) were randomly distributed to 4 treatments, each with 4 replications in a completely randomized design (<strong>CRD</strong>). <em>The treatments consisted of a commercial diet without additives (T1), and the remaining groups received commercial diet with neem leaf meal (T2), girawa leaf meal (T3), and garlic powder (T4) at 2.5% level of inclusion. Performance parameters such as hen-day egg production, egg weight, feed intake, and internal and external egg qualities were evaluated for the laying hens. The results showed that the highest feed intake was reported in T2 (117.77 g/hen) and T4 (117.12 g/hen), while the lowest was reported in T3 (108.20 g/hen) compared to T1 (110.51 g/hen). Neem had the highest (P &lt; 0.05) hen-day egg production (92.45%), followed by garlic (89.78%), and the least hen-day egg production was recorded in girawa (83.86%) compared to control (87.4%). The egg mass was highest for T2, while T1 and T3 had the lowest. No significant difference was observed in egg weight, shell thickness, shell weight, albumin height, albumin weight, yolk weight, yolk height, and yolk diameter. However, egg length and yolk color were significantly (P &lt; 0.05) higher in T2. Therefore, it was concluded that neem leaf meal can be recommended in this study, and it has a good phytogenic feed additive for layer performance and egg qualities.</em></div></div>","PeriodicalId":15240,"journal":{"name":"Journal of Applied Poultry Research","volume":"33 4","pages":"Article 100469"},"PeriodicalIF":1.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142265155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impacts of Artemisia argyi alcohol extract supplementation on lipopolysaccharide-induced oxidative stress in broilers and the underlying mechanism","authors":"Shuo Yang ,&nbsp;Min Huo ,&nbsp;Yuanqing Xu ,&nbsp;Yuanyuan Xing ,&nbsp;Kenan Li ,&nbsp;Xiao Jin ,&nbsp;Sumei Yan ,&nbsp;Binlin Shi","doi":"10.1016/j.japr.2024.100470","DOIUrl":"10.1016/j.japr.2024.100470","url":null,"abstract":"<div><div>This study aimed to investigate the impact of <em>Artemisia argyi</em> alcohol extract (<strong>AAAE</strong>) on lipopolysaccharide (<strong>LPS</strong>)-induced oxidative stress in broilers, providing a theoretical basis for AAAE as a feed additive. The experiment utilized a 2 × 2 factorial randomized complete block design with 2 levels of AAAE supplementation (0 and 750 mg/kg of base diet) and 2 levels of LPS challenge (0 and 750 μg/kg body weight [<strong>BW</strong>]). The experimental period spanned 42 d, divided into 3 phases: phase 1 (d 1–14; adaptation period), phase 2 (d 15–28; challenged with 750 mg /kg BW LPS or saline on d 15, 17, 19, and 21, followed by a 7-d recovery period), and phase 3 (d 29–42; challenged with 750 μg/kg BW LPS or saline on d 29, 31, 33, and 35, with another 7-d recovery period). The addition of AAAE in feed significantly alleviated the reduction in ADG, the apparent metabolic rate of nutrients (DM, CP, Ca) induced by LPS in broiler chickens, improving serum and small intestine antioxidant enzyme activities. Additionally, the supplementation of AAAE significantly upregulated the expression levels of liver <em>Nrf2, CAT</em> mRNA, and duodenum <em>Nrf2</em> mRNA. In conclusion, supplementation of AAAE in the diet alleviated the oxidative damage in liver and duodenum of broilers induced by LPS through the activation of the Nrf2/ARE signaling pathway, leading to increased secretion of downstream antioxidant enzymes.</div></div>","PeriodicalId":15240,"journal":{"name":"Journal of Applied Poultry Research","volume":"33 4","pages":"Article 100470"},"PeriodicalIF":1.6,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142265157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of dietary enteric-released or pure benzoic acid on Ross 708 male broilers","authors":"C.J. Fritzlen ,&nbsp;J.J. Maurer ,&nbsp;W. Chen ,&nbsp;Z. Tan ,&nbsp;H. Liu ,&nbsp;X. Peng ,&nbsp;Z. Qin ,&nbsp;Y. Peng ,&nbsp;M.E. Persia","doi":"10.1016/j.japr.2024.100468","DOIUrl":"10.1016/j.japr.2024.100468","url":null,"abstract":"<div><p>An experiment was conducted to evaluate the effects of pure benzoic acid (<strong>PBA</strong>) or enteric-released benzoic acid (<strong>EBA</strong>) on performance, intestinal histology, apparent ileal digestibility (<strong>AID</strong>), cecal coliform and enterococci abundance, and litter moisture of broilers raised on used litter. Day-old male broiler chicks were assigned to control (<strong>Con</strong>), nontreated diet; positive control (BMD), Con + 50 ppm bacitracin methylene disalicylate; PBA, Con +1,000 ppm of PBA; EBA, Con +330 ppm of EBA. From 0 to 28 and 0 to 42 d, BMD outperformed the Con in either BW gain (<strong>BWG</strong>) or mortality corrected FCR (FCRm) (<em>P</em> ≤ 0.05). Over 0 to 28 d, EBA and PBA improved BWG and FCRm compared to the Con (<em>P</em> ≤ 0.05). When the entire 0 to 42 d period was considered, EBA improved both BWG and FCRm in comparison to Con (<em>P</em> ≤ 0.05). Supplementation with EBA and PBA resulted in inconsistent responses in duodenum and jejunum morphology; specifically, PBA decreased 28 d duodenal crypt depth and increased villus height to crypt depth ratio, while EBA decreased 28 d jejunum crypt depth (<em>P</em> ≤ 0.05). There were no differences in AID or cecal coliform counts (<em>P</em> &gt; 0.05) due to treatment. However, PBA significantly reduced enterococcus counts at 42 d by 0.48 Log₁₀ CFU/g compared to CON. These results suggest that EBA can increase BWG and decrease FCRm, while PBA performance was similar to CON. Additionally, benzoic acid decreased crypt depth, with the response being tissue-specific depending on the form of benzoic used.</p></div>","PeriodicalId":15240,"journal":{"name":"Journal of Applied Poultry Research","volume":"33 4","pages":"Article 100468"},"PeriodicalIF":1.6,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1056617124000667/pdfft?md5=c4d024994674900cec461a8673e95542&pid=1-s2.0-S1056617124000667-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142229630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of prebiotic, probiotic, and synbiotic products on oxidative status, performance, and parasitological parameters of broiler chickens induced with cecal coccidiosis","authors":"M. Ogwiji ,&nbsp;I.D. Jatau ,&nbsp;A.J. Natala ,&nbsp;M. Mohany ,&nbsp;S.S. Al-Rejaie ,&nbsp;M. Zhu","doi":"10.1016/j.japr.2024.100472","DOIUrl":"10.1016/j.japr.2024.100472","url":null,"abstract":"<div><p>The chicken's cellular immune response to invasion by <em>Eimeria tenella</em>, the cause of cecal coccidiosis, a destructive parasitic disease of poultry, generates reactive oxidative species (<strong>ROS</strong>). The antioxidant, performance, and parasitological effects of prebiotic (Sugarcane molasses), probiotic (<em>Saccharomyces cerevisiae</em>), and synbiotic (cocktail of probiotics and prebiotics) supplementation in drinking water on cecal coccidiosis were investigated in this report. Ninety day-old broiler chicks were divided into 6 groups (A, B, C, D, E, and F), each with 15 chicks. At 21 d of age, Groups B – F were inoculated with 2.0 × 10⁴ <em>Eimeria tenella</em> sporulated oocysts/chick. Group A was used as negative control. The positive control Group B, was not supplemented. Throughout the experiment, Group C was given sugarcane molasses, Group D was given probiotics and Group E was given synbiotics. Group F received prophylactic amprolium treatment. Results revealed inoculated groups had significant (<em>P</em> &lt; 0.05) increases in glutathione peroxidase (<strong>GPx</strong>) activities; 4.59 ± 3.89, 3.47 ± 0.92, 4.03 ± 1.89, 4.44 ± 1.99, 3.47 ± 1.44 U/ml in Groups B, C, D, E and F respectively compared with Group A (1.90 ± 0.21 U/ml) at 1-wk post inoculation (PI). Malondialdehyde (<strong>MDA</strong>) concentration likewise increased significantly in the same groups and period. However, superoxide dismutase (<strong>SOD</strong>) activities decreased significantly in the inoculated groups; 1,210.57 ± 29.59, 2,536.83 ± 108.82, 3,049.97 ± 86.68, 2,776.80 ± 399.69, 1,868.83 ± 45.04 U/ml in Groups B to F respectively compared with Group A (3,502.47 ± 224.35 U/ml) while catalase (<strong>CAT</strong>) activities were increased. Oocysts shed in feces were significantly increased 1-wk postinoculation in B but least in F, cecal lesion scores were similar. Feed intake declined significantly in inoculated groups especially B, alongside weight gain. Feed conversion ratio increased in the inoculated groups. The differences in the activities of the enzymes and MDA level between the supplemented groups and the positive control alongside evaluated parasitological parameters show the antioxidant effect of these supplements.</p></div>","PeriodicalId":15240,"journal":{"name":"Journal of Applied Poultry Research","volume":"33 4","pages":"Article 100472"},"PeriodicalIF":1.6,"publicationDate":"2024-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1056617124000709/pdfft?md5=3735742418c2f171e9c64cca3ed8773e&pid=1-s2.0-S1056617124000709-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142243325","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"In ovo feeding of Citrus aurantiifolia seed extract on hatchability, chick quality, physiological response, intestinal morphology and posthatch growth performance of cobb 500 broiler chickens","authors":"R.F. Kpossou ,&nbsp;B. Adjei-Mensah ,&nbsp;O. N'nanle ,&nbsp;N. Everaert ,&nbsp;K. Tona","doi":"10.1016/j.japr.2024.100471","DOIUrl":"10.1016/j.japr.2024.100471","url":null,"abstract":"<div><div>This experiment was performed to evaluate the effect of <em>in ovo</em> injection of <em>Citrus aurantiifolia</em> seeds extract (<strong>CASE</strong>) into broiler incubating eggs. Five hundred and four (504) Cobb 500 breeder eggs with evidence of living embryos were selected for air chamber injection on embryonic d 18. The experimental treatments included control (without injection), Ext0.5µg (eggs injected with 0.5 μg/ml of CASE), Ext0.75µg (eggs injected with 0.75 μg/ml of CASE), Ext1µg (eggs injected with 1.0 μg/ml of CASE). After hatching, 360 chicks were distributed to their respective treatments with 6 replicates and raised for 6 wk in a completely randomized design (15 birds per replicate). The hatch events time decreased with increasing levels of CASE injection while at day old, the concentration of hematological parameters and chick quality score increased in all the <em>in ovo</em> injection treatments (<em>P</em> &lt; 0.05). The injection of CASE at 0.5 µg/ml into the incubated eggs increased the weight of chicks at hatch and the ratio of the weight of chicks at hatch to the weight of the incubated egg (<em>P</em> &lt; 0.001) and showed improved values of body weight gain and feed conversion ratio at 42 d. At hatch time, the injection of CASE showed a higher concentration of T4 (thyroxine) and a marked increase in plasma SOD (superoxide dismutase) activity compared to the control (<em>P</em> &lt; 0.05). Additionally, CASE injection caused a significant improvement in the jejunal morphometry (<em>P</em> &lt; 0.05). It was concluded that the <em>in ovo</em> injection of <em>Citrus aurantiifolia</em> seed extract during the prehatch period in broiler eggs is effective at 0.5 µg/ml.</div></div>","PeriodicalId":15240,"journal":{"name":"Journal of Applied Poultry Research","volume":"33 4","pages":"Article 100471"},"PeriodicalIF":1.6,"publicationDate":"2024-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1056617124000692/pdfft?md5=096a0802377dfc58f2cc653a1e598a08&pid=1-s2.0-S1056617124000692-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142265185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}