British Poultry Science最新文献_第9页

Influence of particle size and inclusion level of oat hulls on retention and passage in the anterior digestive tract of broilers. 燕麦壳的粒度和加入量对肉鸡前消化道滞留和通过的影响

IF 1.6 3区农林科学

British Poultry Science Pub Date : 2024-11-25 DOI: 10.1080/00071668.2024.2426667

S Ghimire, K Itani, S Kaczmarek, A Smith, B Svihus

{"title":"Influence of particle size and inclusion level of oat hulls on retention and passage in the anterior digestive tract of broilers.","authors":"S Ghimire, K Itani, S Kaczmarek, A Smith, B Svihus","doi":"10.1080/00071668.2024.2426667","DOIUrl":"https://doi.org/10.1080/00071668.2024.2426667","url":null,"abstract":"1. Six pelleted diets with different ratios of whole oats to dehulled oats, ground either finely (2 mm) or coarsely (6 mm), resulting in 0.05% (LOH), 6.5% (MOH) and 11.4% (HOH) OH inclusion, were fed to broilers to study gizzard functionality and its influence on passage of large oat hull (OH) particles. The hypothesis was that coarse OH would be selectively retained in gizzard for grinding, but higher levels would increasingly result in passage of unground OH.2. In experiment 1, gizzard and small intestinal contents were sampled from 78 birds at 28-29 d of age. Neutral detergent fibre (NDF) of gizzard contents was over three times higher than that of diets, indicating selective retention. An interaction effect of OH and screen size was seen for large particles (>1.6 mm) in the upper ileum, which was higher for MOH and HOH than LOH and only for coarse diets. This indicated that passage of unground coarse large particles from the gizzard increased when it exceeded a maximum retention level.3. In experiment 2, pre-weighed amount of HOH 2 mm and HOH 6 mm diets were fed to 80 birds for 2 h and were sampled on d 30 at 0, 2, 4, 8 and16 h to study OH degradation and flow. Contents were sampled from the crop, gizzard, small intestine, colon/cloaca and excreta. Unrecovered NDF in gastrointestinal tract plus excreta increased with more time and coarseness. An interaction effect between time and screen size was found for large particles in excreta, which was higher for 6 mm diets than 2 mm diets at 16 h.4. The presence of large OH particles in excreta challenged the previous assumption that particles are ground in the gizzard to a certain critical size before passing down further down the digestive tract. Some OH seemed to escape grinding in gizzard and this was higher for coarser particles.","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"1-10"},"PeriodicalIF":1.6,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142709316","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Temporal appearance of embryonic compartments and their sexual dimorphism in chicken. 鸡胚胎分区的时间性出现及其性别二态性。

IF 1.6 3区农林科学

British Poultry Science Pub Date : 2024-11-25 DOI: 10.1080/00071668.2024.2430634

P Horkaew, S Kupittayanant, P Kupittayanant

{"title":"Temporal appearance of embryonic compartments and their sexual dimorphism in chicken.","authors":"P Horkaew, S Kupittayanant, P Kupittayanant","doi":"10.1080/00071668.2024.2430634","DOIUrl":"https://doi.org/10.1080/00071668.2024.2430634","url":null,"abstract":"1. Building on established understandings regarding hormonal and metabolic-driven processes of avian embryo's growth and development, this paper proposes a novel method, focusing on sex-related dimorphism. Such processes involve crucial activities, e.g. nutrition delivery, gas exchange and waste disposal. These are influenced by interactions among various structures within embryonic compartments, whose sequential patterns between males and females have been proven different.2. The embryonic compartments, having undergone physiological changes during d 8-12, were acquired from candled images. Their temporal appearance model was developed from a non-linear classifier. It was hypothesised that if there is any distinctive pattern associated with the embryonic compartments between embryo sexes, then the classifier can be trained to recognise the dimorphism.3. The results revealed that the proposed method could separate sexes in ovo with accuracy, recall, precision and balance accuracy of 94.71, 93.47, 95.92 and 94.72%, respectively. Error analyses found 4.82% false discovery and 9.78% false omission rates. The method was expected to enhance farming resource management and leads to better animal welfare.","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"1-12"},"PeriodicalIF":1.6,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142709318","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Genetic parameter estimation for traits related to the immune system against sheep red blood cells in Japanese quail. 日本鹌鹑对绵羊红细胞免疫系统相关性状的遗传参数估计

IF 1.6 3区农林科学

British Poultry Science Pub Date : 2024-11-20 DOI: 10.1080/00071668.2024.2428302

Batol Asghari, Saeed Zerehdaran, Zahra Kheirkhah

{"title":"Genetic parameter estimation for traits related to the immune system against sheep red blood cells in Japanese quail.","authors":"Batol Asghari, Saeed Zerehdaran, Zahra Kheirkhah","doi":"10.1080/00071668.2024.2428302","DOIUrl":"https://doi.org/10.1080/00071668.2024.2428302","url":null,"abstract":"1. Improving resistance against disease is important in the animal and poultry industry. Besides drugs and vaccines, genetic selection for improved immune systems may be an effective approach.2. Traits related to the immune system were studied in a 938 pedigreed Japanese quail population infected by sheep red blood cells (SRBC). Besides body weight at 35 d of age (BW35), weight of the gizzard (G), liver (Li), lungs (Lu), bursa (Bu), spleen (S), heart (H), and digestive track (D) and length of ileum (I) and caecum (C) were recorded. Total antibody (TA), mercaptoethanol-resistant (IgG), mercaptoethanol-sensitive titres (IgM), the number of monocyte (M), basophil (B) and eosinophil (E) and the ratio of heterophil to lymphocyte (H/L) were measured. Co-variance components were estimated via Gibbs sampling using GIBBS3F90 software. Five univariate animal models, including simple forms, were used for genetic parameter estimations, and the best model was determined by the deviance information criterion (DIC). Genetic and environmental correlations were estimated using a bivariate animal model.3. Direct heritability estimates for internal organs ranged from 0.06 (Lu) to 0.57 (G) and for immune system traits from 0.05 (IgM) to 0.17 (IgG). Negative genetic correlations were found between BW35 and internal organs (-0.22 to -0.80).4. Including one of the internal organs, such as the spleen, in the selection index improved the immune response in heavier birds. Additionally, because of the moderate heritability of IgG (0.17) and its effect on lasting immunity, selecting for higher IgG concentration may improve the resistance of Japanese quail against pathogens.","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"1-8"},"PeriodicalIF":1.6,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142675232","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of the early incubation temperature on the muscle physiology, meat quality, bone strength and gait score in Ross broilers. 早期孵化温度对罗斯肉鸡肌肉生理机能、肉质、骨强度和步态评分的影响

IF 1.6 3区农林科学

British Poultry Science Pub Date : 2024-11-18 DOI: 10.1080/00071668.2024.2419614

T Kettrukat, J S Petersen, E Grochowska, M Therkildsen

{"title":"Effects of the early incubation temperature on the muscle physiology, meat quality, bone strength and gait score in Ross broilers.","authors":"T Kettrukat, J S Petersen, E Grochowska, M Therkildsen","doi":"10.1080/00071668.2024.2419614","DOIUrl":"10.1080/00071668.2024.2419614","url":null,"abstract":"1. Modern broiler chickens are among the most efficient livestock in terms of resource requirements and production time. To maintain and improve production efficiency and meat quality and account for welfare problems, early interventions, such as incubation temperature, require investigation2. In this study, Ross 308 broiler eggs were incubated at either 36.5°C or 38.5°C on embryonic days (ED) 4-7. The control group eggs were incubated at a constant temperature of 37.5°C. Musculus pectoralis and musculus gastrocnemius samples were taken for the investigation of muscle physiology, and the tibia was sampled for bone strength analysis from chickens aged 35 and 36 d. In addition, meat quality was analysed and gait scoring was performed.3. The performance of chickens in the 36.5°C group was inferior to those in the other groups up to d 10 post-hatch, but compensatory growth was seen by d 35 of age. Meat quality was unaffected, but significant differences between sexes were observed. Males had lighter meat colour than females. Muscle glycogen and intramuscular fat were unaffected by the incubation temperature, but the muscularis pectoralis and gastrocnemius intramuscular fat contents were greater in males than in females, accompanied by the increased expression of enzymes involved in lipolysis. In the 38.5°C group, males had less bone elasticity than females, and the inverse was observed in the other groups. Gait scores were affected by sex but not incubation temperature.4. The results of this study showed a stronger effect of sex than incubation temperature on broiler muscle physiology, bone strength, performance and meat quality.","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"1-12"},"PeriodicalIF":1.6,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142646592","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Salmonella enterica Enteritidis and Heidelberg serotype-specific molecular detection in poultry samples by a rapid isothermal method. 用快速等温法对家禽样本中的肠炎沙门氏菌和海德堡血清型进行特异性分子检测。

IF 1.6 3区农林科学

British Poultry Science Pub Date : 2024-11-11 DOI: 10.1080/00071668.2024.2419623

C F D S Andrade, M N Souza, I I D S Dantas, A S K Fonseca, N Ikuta, D Kipper, V R Lunge

{"title":"Salmonella enterica Enteritidis and Heidelberg serotype-specific molecular detection in poultry samples by a rapid isothermal method.","authors":"C F D S Andrade, M N Souza, I I D S Dantas, A S K Fonseca, N Ikuta, D Kipper, V R Lunge","doi":"10.1080/00071668.2024.2419623","DOIUrl":"https://doi.org/10.1080/00071668.2024.2419623","url":null,"abstract":"1. Loop-mediated isothermal amplification (LAMP) assays were developed to detect Salmonella enterica subspecies enterica serotypes Enteritidis and Heidelberg in poultry farms. These serotype-specific methods were evaluated in comparison with PCR in the analysis of different Salmonella spp. serotypes from a culture collection and poultry farm samples.2. The results demonstrated the specific amplification of the genetic targets safA in all S. Enteritidis (n = 10) and ACF69659 in all S. Heidelberg (n = 36) isolates from the culture collection. The remaining isolates from other Salmonella spp. serotypes (n = 84) and bacterial species (n = 8) were negative in both LAMP assays.3. The methods detected DNAs from S. Enteritidis and S. Heidelberg after a single-step pre-enrichment in buffered peptone water of the poultry samples, which agreed with previously developed PCR methods to detect these same two serotypes.4. In conclusion, LAMP assays were useful for rapid serotype-specific detection, being suitable for surveillance purposes in resource-limited environments such as poultry farms.","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"1-7"},"PeriodicalIF":1.6,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142615189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Does the distribution of light intensity within the barn impact broiler production and welfare? 鸡舍内的光照强度分布会影响肉鸡的生产和福利吗？

IF 1.6 3区农林科学

British Poultry Science Pub Date : 2024-10-28 DOI: 10.1080/00071668.2024.2414460

T Shynkaruk, M Parsons, C A B Adler, C Goeree, K Long, K Schwean-Lardner

{"title":"Does the distribution of light intensity within the barn impact broiler production and welfare?","authors":"T Shynkaruk, M Parsons, C A B Adler, C Goeree, K Long, K Schwean-Lardner","doi":"10.1080/00071668.2024.2414460","DOIUrl":"https://doi.org/10.1080/00071668.2024.2414460","url":null,"abstract":"1. The objective of this study was to determine if rearing broilers under variable light intensity (VLI) impacted their welfare or productivity.2. Ross 308 broilers (n = 7,256) were reared until 35 d of age and exposed to a uniform intensity of 10 lux (CON) or VLI with low intensity areas of 2-5 lux proximal to the walls and high intensity areas of 84-133 lux proximal to feeders.3. The data were analysed as a complete randomised design using an analysis of variance. Significance was declared when p ≤ 0.05.4. Applying VLI resulted in increased feed intake early in life but had no impact on body weight. Overall efficiency was improved in the CON treatment. Mortality diagnoses of skeletal problems were reduced under VLI. Treatment had no impact on footpad, hock or gait score, heterophil to lymphocyte ratio or melatonin concentration. Birds performed certain behaviours in specific locations within the room, independent of light intensity treatment.5. In conclusion, raising broilers under VLI had little impact on production or most welfare parameters assessed in this study. However, satisfying the bird's preference for different light intensities may improve welfare.","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"1-9"},"PeriodicalIF":1.6,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142495555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Temporal variation characteristics of microbial aerosols in the goose house environment. 鹅舍环境中微生物气溶胶的时间变化特征。

IF 1.6 3区农林科学

British Poultry Science Pub Date : 2024-10-01 Epub Date: 2024-07-12 DOI: 10.1080/00071668.2024.2360621

Z Chen, C Lou, W Zheng, B Wu

{"title":"Temporal variation characteristics of microbial aerosols in the goose house environment.","authors":"Z Chen, C Lou, W Zheng, B Wu","doi":"10.1080/00071668.2024.2360621","DOIUrl":"10.1080/00071668.2024.2360621","url":null,"abstract":"1. Preventing disease is important in poultry production systems, but this has mainly been studied in chickens. The aim of this study is to explore the impact of microbial aerosols in intensive goose house environments.2. To evaluate the environmental quality of geese housing, fine particulate matter (PM2.5) was collected using an ambient air particulate matter sampler. High-throughput sequencing was used to analyse bacterial diversity and relative abundance. Results showed that the number of general and operational taxonomic units (OTUs) were 1,578 and 19 112 in all PM2.5 samples. Firmicutes, Bacteroidota, Proteobacteria, Acidobacterota were the four most abundant phyla in PM2.5.3. Compared with bacterial phyla in the PM2.5 from chicken houses, those in the genus Acidobacterota were increased in goose housing. There are various genera of bacteria present in PM2.5, and their composition was similar across different samples. No significant change was observed in the diversity of microbiota in the PM2.5, although multiple pathogenic bacteria were detected.4. A prediction function showed that a variety of bacterial phyla correlated positively with the human diseases.5. In summary, the microbial aerosols in the goose shed pose significant risks to the health of the geese. Regular monitoring of the composition of microbial aerosols is important for the healthy growth of geese and disease prevention and control.","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"538-545"},"PeriodicalIF":1.6,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141589712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

FEDM: a convolutional neural network based fertilised egg detection model. FEDM：基于卷积神经网络的受精卵检测模型。

IF 1.6 3区农林科学

British Poultry Science Pub Date : 2024-10-01 Epub Date: 2024-06-03 DOI: 10.1080/00071668.2024.2356656

Z Gong, M Wang, J Song

{"title":"FEDM: a convolutional neural network based fertilised egg detection model.","authors":"Z Gong, M Wang, J Song","doi":"10.1080/00071668.2024.2356656","DOIUrl":"10.1080/00071668.2024.2356656","url":null,"abstract":"1. The production of goose eggs holds significant economic value on a global scale and the quality of fertilised eggs is crucial for the successful hatching and sustained development of the poultry industry. Developing a low-cost fertilised egg identification system that is suitable for large-scale testing is of great significance. However, existing methods are expensive and have high environmental detection requirements, which limit their promotion.2. To address this issue, an improved object detection model called FEDM based on YOLOv5 is proposed, which has been shown to be outstanding among nine models. The main network of YOLOv5 is enhanced with the SENet attention mechanism to improve the feature selection capability. The C3_DCNv3 is introduced to enhance the detection ability of blood vessels in the fertilised eggs. The application of Dyhead significantly improved the representation capacity of the object detection head without any computational overhead. The loss function is replaced with MPDIoU to simplify the calculation process.3. Experimental results from the augmented dataset showed that the average precision of the FEDM reached 96.7%, which is a 5.5% improvement compared to the YOLOv5s model. FEDM exhibited better detection performance on eggs from different shooting angles than the YOLOv5 algorithm and achieves high detection speed.4. The FEDM secured significant advancement on the detection rate of the fourth day fertilised egg compared to the YOLOv5 algorithm. Based on this result, savings and space utilisation can be made, which has practical application value.","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"546-558"},"PeriodicalIF":1.6,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141198628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Efficacy of maize differing in particle size in low-density protein diets fed to broilers from day 1 to 21 of age. 不同粒径的玉米在第 1 至 21 日龄肉鸡低密度蛋白质日粮中的功效。

IF 1.6 3区农林科学

British Poultry Science Pub Date : 2024-10-01 Epub Date: 2024-05-24 DOI: 10.1080/00071668.2024.2356655

M Naeem, E J Burton, D V Scholey, A Alkhtib, S Broadberry

{"title":"Efficacy of maize differing in particle size in low-density protein diets fed to broilers from day 1 to 21 of age.","authors":"M Naeem, E J Burton, D V Scholey, A Alkhtib, S Broadberry","doi":"10.1080/00071668.2024.2356655","DOIUrl":"10.1080/00071668.2024.2356655","url":null,"abstract":"1. This study evaluated the efficacy of maize differing in particle size in low-density protein diets on performance, the digestive tract and litter characteristics in broilers. Four dietary treatments; control commercial diet with a typical crude protein content 22.50% (CON); CON + 20% maize with particle size 350 µm (M350), crude protein 19.90%; CON + 20% maize with particle size 2600 µm (M2600), crude protein 19.90%; CON + 20% whole maize (WM), crude protein 19.90%, were fed ad libitum to broiler chicks up to 21 d of age.2. No differences in body weight gain, feed intake and FCR were found between the WM and CON. WM increased body weight gain compared to M350 and M2600. M350, M2600 and WM increased (p = 0.004) gizzard relative weight compared with CON on day 14. Both WM and M2600 reduced (p = 0.001) gastric isthmus diameter on d 14 and 21 compared with CON and M350.3. No differences were seen in mucosa for the Lamina propria and the extent of Tunica muscularis of gizzard on d 21 and ileum mucosal depth on d 14 between WM and CON diets. However, WM reduced villus-to-crypt ratio compared with CON on d 21. The M350 reduced (p < 0.05) gizzard digesta particle size compared with CON, M2600 and WM on d 14.4. Both WM and M350 decreased (p < 0.05) nitrogen excretion compared to birds fed CON. Feeding WM increased nitrogen efficiency compared with M350 and M2600 diets, but was similar to birds fed CON. Feeding M350, M2600 or WM decreased (p < 0.05) litter moisture and footpad dermatitis (FPD) scores compared with results from birds fed CON.5. Overall, diluting the protein level in broiler diets with whole maize appeared better than fine or coarse maize in terms of growth performance, digestive tract development, nitrogen excretion and litter parameters. This may lead to economic benefits by reducing grinding costs and dependence on rich protein resources contributing to sustainable meat production and food security.","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"615-624"},"PeriodicalIF":1.6,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141086750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of graded levels of dietary microbial 6-phytase on performance, intestinal histomorphology, caecal microbial population and short-chain fatty acid composition of Lohmann white-classics. 分级水平的日粮微生物 6-phytase 对 Lohmann white-classics 的性能、肠道组织形态学、盲肠微生物群和短链脂肪酸组成的影响。

IF 1.6 3区农林科学

British Poultry Science Pub Date : 2024-10-01 Epub Date: 2024-07-12 DOI: 10.1080/00071668.2024.2352835

Y Cufadar, S Golzar Adabi, E T Gül, L Nollet

{"title":"Effects of graded levels of dietary microbial 6-phytase on performance, intestinal histomorphology, caecal microbial population and short-chain fatty acid composition of Lohmann white-classics.","authors":"Y Cufadar, S Golzar Adabi, E T Gül, L Nollet","doi":"10.1080/00071668.2024.2352835","DOIUrl":"10.1080/00071668.2024.2352835","url":null,"abstract":"1. This study was conducted to determine the effects of graded levels of phytase on the performance, egg quality and gut health of white laying hens.2. Treatments consisted of a negative control (NC) diet containing 0.14% available phosphorus (avP), positive control (PC) diet containing 0.35% avP provided via dicalcium phosphate (DCP) and DCP replaced in the PC by with three graded levels of phytase derived from Komagataella phaffii at 500 (PC-500), 750 (PC-750) and 1000 (PC-1000) FTU/kg which provided 0.176%, 0.188% and 0.200% of avP, respectively.3. Egg production, feed intake, feed conversion ratio and jejunal morphometry were negatively affected in NC-fed birds (p < 0.05). Considering the whole period, birds fed a diet supplemented with graded levels of phytase shared the same egg production and feed intake levels with PC birds (p < 0.05). Feed conversion ratio was significantly lowered by 4.9%, 1.6% and 7.6% in hens fed on diets PC-500, PC-750 and PC-1000, respectively compared to those fed the PC (p < 0.05).4. Neither of the dietary treatments affected cracked eggs, dirty eggs, eggshell breaking strength and eggshell thickness. Dietary supplementation of phytase significantly increased villus surface area by 15%, 36% and 40% in PC-500, PC-750 and PC-1000 birds, respectively compared to PC (p < 0.05).5. A significant increase in lactobacillus count was observed in line with increasing the level of phytase (p < 0.05). Dietary treatments had no effect on the caecal coliform or aerobic populations. Furthermore, phytase supplementation significantly increased the concentrations of total caecal short-chain fatty acid (SCFA; p < 0.01).6. In conclusion, along with improving performance parameters, the inclusion of phytase in laying hen diets can ameliorate intestinal morphology and stimulate caecal microflora and increase SCFA concentrations.","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"595-604"},"PeriodicalIF":1.6,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141589707","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0