Poultry Science最新文献

{"title":"Crisis and risk management in poultry production: Preparing future leaders for sustainability and food security","authors":"Farid S. Nassar,&nbsp;Ahmed O. Abbas","doi":"10.1016/j.psj.2025.105903","DOIUrl":"10.1016/j.psj.2025.105903","url":null,"abstract":"<div><div>Poultry production sector is a cornerstone of food security at national and global levels, providing a vital source of animal protein. However, it faces mounting challenges, including epidemics, avian diseases, supply chain disruptions, climate change impacts, and rising production costs. Despite the significance of these risks, crisis and risk management remain underrepresented in higher education curricula for this essential industry. This study explores the importance of developing the knowledge and skills of poultry science students in crisis and risk management as future leaders in the poultry industry, as well as enhancing their employability, with the aim of ensuring sector sustainability and strengthening food security. A qualitative descriptive methodology, including an extensive literature review, was employed to assess the impact of crises and risk management on industry sustainability and on shaping student competencies for effective leadership in addressing challenges. Findings reveal a significant gap in poultry science education regarding crisis and risk management, undermining graduates’ readiness to lead during real-world emergencies. Simultaneously, stakeholders and academic institutions increasingly call for embedding these essential skills into curricula, recognizing their role in enhancing graduate employability and industry resilience. The study recommends reviewing and developing poultry science programs to incorporate concepts of crisis and risk management, alongside providing advanced training in collaboration with industry partners and stakeholders. It also emphasizes the need to recognize risk management as a core component of quality assurance standards within poultry science programs to ensure sector sustainability and promote academic and professional excellence. Additionally, the study provides guidance to policymakers and decision-makers in higher education institutions and poultry science programs on the importance of preparing students to become strategic leaders capable of effectively managing crises, making informed decisions, and safeguarding the sustainability of the poultry industry in the face of future challenges with confidence and competence.</div></div>","PeriodicalId":20459,"journal":{"name":"Poultry Science","volume":"104 12","pages":"Article 105903"},"PeriodicalIF":4.2,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145207339","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"10,12-Conjugated linoleic acid alleviates lipid accumulation in primary chicken hepatocytes via the ERK1/2-AMPK pathway","authors":"Xuelan Liu ,&nbsp;Peipei Yan ,&nbsp;Heng Zhang ,&nbsp;Qingtao Gao ,&nbsp;Yan Shang ,&nbsp;Chunyan Fu","doi":"10.1016/j.psj.2025.105904","DOIUrl":"10.1016/j.psj.2025.105904","url":null,"abstract":"<div><div>Conjugated linoleic acid (CLA) isomers have been reported to reduce body weight and promote glycolipid metabolism in animals. In a preliminary study, we revealed that trans-10, cis-12-CLA (10,12-CLA) plays an important role in modulating lipid metabolism in chickens. However, the underlying mechanism remains unclear. In this study, we constructed an isolated in vitro model with primary chicken hepatocytes to investigate the effect of 10,12-CLA on lipid metabolism. 10,12-CLA inhibited lipid accumulation by decreasing the mRNA expression of sterol regulatory element-binding protein-1c (<em>SREBP-1c</em>), <em>SREBP2</em>, 3‑hydroxy-3-methylglutaryl-CoA reductase (<em>HMGCR</em>), fatty acid synthase (<em>FAS</em>), adipose triacylglyceride lipase (<em>ACC</em>), and lipoprotein lipase (<em>LPL</em>) and increasing the mRNA expression of peroxisome proliferator-activated receptor α (<em>PPARα</em>), carnitine palmitoyltransferase 1 (<em>CPT1</em>) and adipose triacylglyceride lipase (<em>ATGL</em>). Furthermore, 10,12-CLA treatment activated the protein expression of extracellular signal-regulated kinase 1/2 (ERK1/2) and AMP-activated protein kinase (AMPK), whereas treatment with the ERK1/2 inhibitor U0126 reversed the inhibitory effects of 10,12-CLA on lipid accumulation by blocking the ERK1/2-AMPK pathway, leading to increased lipid accumulation and triglyceride content in primary chicken hepatocytes. These findings suggest that in chicken hepatocytes, 10,12-CLA alleviates hepatocyte lipid deposition by activating the ERK1/2-AMPK pathway, promoting fatty acid oxidation and reducing lipid synthesis, revealing the potential mechanism through which 10,12-CLA regulates hepatic lipid metabolism in chickens.</div></div>","PeriodicalId":20459,"journal":{"name":"Poultry Science","volume":"104 12","pages":"Article 105904"},"PeriodicalIF":4.2,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145213409","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dietary fermented Artemisia argyi enhances growth performance, hepatic antioxidant activity, and intestinal health in Hongyu roosters.","authors":"Zifu Ni, Azhen Nie, Muhammad Imran, Zhongke Sun, Boyuan Zhang, Zihao Wang, Yanli Qi, Chengwei Li","doi":"10.1016/j.psj.2025.105900","DOIUrl":"https://doi.org/10.1016/j.psj.2025.105900","url":null,"abstract":"<p><p>The Hongyu rooster, prized in China's poultry industry for its tender meat, high protein, and low fat content, represents an important production breed. This study evaluated the effects of Lactobacillus plantarum-fermented Artemisia argyi (AA) as a dietary supplement on growth performance, intestinal health, and antioxidant capacity. The results showed that fermented AA significantly increased the daily weight gain and reduced the feed-to-gain ratio in Hongyu roosters (P < 0.05), with the 1 % group exhibiting the most substantial effect. Furthermore, fermented AA enhanced intestinal barrier functions by upregulating mRNA expression of Claudin-1, JAM-2, Mucin-2, and Occludin, while downregulating Claudin-2 (P < 0.05). Fermented AA also alleviated inflammation by inhibiting pro-inflammatory cytokines, promoting IL-10, and regulating the TLR4/MyD88/NF-κB pathway, with the 3 % group showing the strongest effect. Intestinal morphology and function were improved through increased villus height, higher villus height-to-crypt depth ratio, reduced crypt depth, elevated short-chain fatty acids, and greater jejunal sIgA and IgM concentrations. Antioxidant defense was enhanced by suppression of Keap1 and upregulation of CAT, SOD-1, Nrf2, and GPx-1. Gut microbiota composition was also reshaped, with increased Bacteroidetes and reduced Firmicutes. In conclusion, fermented AA supplementation improved growth, intestinal integrity, antioxidant capacity, and immune function in Hongyu roosters, highlighting its potential as a functional feed additive.</p>","PeriodicalId":20459,"journal":{"name":"Poultry Science","volume":"104 12","pages":"105900"},"PeriodicalIF":4.2,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145233271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dietary butyrate effects on broiler growth, intestinal morphology and integrity, cecal volatile fatty acid concentrations, and colonic bacteria in broilers.","authors":"Sarah C Pearce, Brian J Kerr, Melissa S Monson, Shelby M Ramirez","doi":"10.1016/j.psj.2025.105898","DOIUrl":"https://doi.org/10.1016/j.psj.2025.105898","url":null,"abstract":"<p><p>Butyrate is a short-chain fatty acid that can be given as a dietary additive to support intestinal health and poultry performance. Providing butyrate in a protected form that reaches the hindgut could have different effects than an earlier-absorbed butyric acid salt. To compare these additives, 468 broiler chicks were housed 12 birds per pen, with 13 pens per dietary treatment. Birds were fed a three-phase feeding regimen for 42 d divided into three dietary treatments: a negative control diet, a diet containing 260 mg of unprotected sodium butyrate/kg diet, or a diet containing 260 mg/kg diet of a fat matric encapsulated calcium butyrate. Performance parameters (daily gain, daily feed, and gain to feed ratio) were obtained for the overall feeding study. On d 42, samples of cecal fluid were collected for pH and volatile fatty acid (VFA) analysis (n = 13 pooled samples/diet), jejunum and colon tissue for intestinal morphology evaluation (n = 6 birds/diet), cecum, cecal tonsil, crop, and spleen tissues for quantitative PCR evaluation (n = 8 birds/diet), and jejunum and colon for ex vivo assessment of intestinal integrity and barrier function (n = 13 birds/diet). There was no effect of dietary treatment on feed intake or feed efficiency (P > 0.10) with a tendency for gain to increase due to dietary butyrate, regardless of source (P = 0.07). There was no effect of dietary butyrate on cecal pH, propionate, butyrate, or total VFA (P > 0.10) with a tendency for butyrate, regardless of source, to reduce acetate concentrations (P = 0.07). There was no effect of dietary butyrate on intestinal morphology (P > 0.10) or barrier functions (P > 0.10) in the jejunum or colon. Diets containing the protected-calcium butyrate generally decreased gene expression of tight junction and inflammatory genes in the cecum and decreased inflammatory gene expression in the cecal tonsil and spleen. In general, dietary butyrate, regardless of source, exhibited little effect on performance or most physiological measures.</p>","PeriodicalId":20459,"journal":{"name":"Poultry Science","volume":"104 12","pages":"105898"},"PeriodicalIF":4.2,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145233288","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of fructooligosaccharide administration routes on growth performance, gut integrity, microbiota, and meat quality in broiler chickens exposed to reused litter.","authors":"Yuwares Ruangpanit, Konkawat Rassmidatta, Ananchai Philatha, Prayooth Saothong, Chokchai Sompugdee, Papawee Phungkeha, Kanokrat Srikijkasemwat, Kazeem D Adeyemi, Rasheed O Sulaimon, Panneepa Sivapirunthep, Chanporn Chaosap","doi":"10.1016/j.psj.2025.105899","DOIUrl":"https://doi.org/10.1016/j.psj.2025.105899","url":null,"abstract":"<p><p>This study investigated the effects of dietary fructooligosaccharide (FOS) supplementation, administered via feed or drinking water, on growth performance, gut morphology, microbiota, stress response, and meat quality in broiler chickens reared under reused litter conditions. A total of 900 one-day-old male Ross 308 chicks were randomly allocated to three groups: a control (CON), 0.5 % FOS in drinking water (FOS-W), and 0.5 % FOS in feed (FOS-F), over a 38-day trial conducted using reused litter to simulate oxidative and physiological stress. FOS administration route had no significant effect on growth performance, carcass characteristics, gut morphology, cecal microbiota composition, stress indicators, meat quality, or ribonucleotide levels. Furthermore, FOS supplementation, irrespective of delivery method, did not influence growth, carcass traits, or meat quality when compared to the control. However, both FOS-supplemented groups exhibited significantly higher villus height-to-crypt depth ratios in the ileum and jejunum, increased cecal Lactobacillus counts, and reduced heterophil-to-lymphocyte ratios, indicating enhanced intestinal integrity and reduced physiological stress. In conclusion, while FOS supplementation did not affect performance or meat quality under reused litter conditions, it positively influenced gut morphology, microbial balance, and stress response. These findings support the potential of FOS as a functional feed additive to improve intestinal health and resilience in broiler chickens under intensive production systems.</p>","PeriodicalId":20459,"journal":{"name":"Poultry Science","volume":"104 11","pages":"105899"},"PeriodicalIF":4.2,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145200597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Review: Research progress on broodiness behavior and its molecular mechanisms in poultry","authors":"Jing Hu ,&nbsp;Ramlat Ali Haji ,&nbsp;Haiping Liang,&nbsp;Ji Cao,&nbsp;Ziyue Wan,&nbsp;Jingyi Zhang,&nbsp;Haiyan Zhu,&nbsp;Zhao Wang,&nbsp;Qing Wei,&nbsp;Xianhua Xie,&nbsp;Jianzhen Huang","doi":"10.1016/j.psj.2025.105895","DOIUrl":"10.1016/j.psj.2025.105895","url":null,"abstract":"<div><div>Broodiness is a natural maternal behavior exhibited by female poultry, characterized by increased time spent sitting on the nest, feather fluffing, decreased appetite, cessation of egg-laying, and incubation behavior. The broodiness characteristics of female poultry are primarily regulated by external environmental factors and internal factors (such as genetics and hormones), and are regulated at the organ, cell, and molecular levels. At the organ level, the hypothalamic-pituitary-ovarian <strong>(HPO)</strong> axis plays a crucial role in regulating broodiness behavior. At the cellular level, hypothalamic hormones (such as GnRH), pituitary hormones (such as PRL, FSH, and LH), and gonadal hormones (such as estrogen and progesterone) bind to corresponding receptors on the cell membrane, activating different signaling pathways to regulate the apoptosis and autophagy of granulosa cells <strong>(GCs)</strong>, thereby influencing the occurrence of broodiness behavior. At the molecular level, broodiness behavior in avian species is a complex trait controlled by multiple genes, with epigenetics playing a key role in the regulation of gene expression. However, the exact regulatory mechanisms of how these factors affect the ovarian structure and function, and consequently lead to broodiness behavior, remain unclear. Therefore, this paper discussed the characteristics of poultry broodiness behavior, the morphological changes in the reproductive system before and after broodiness, and provided a review of the regulatory mechanisms at the organ, cellular, and molecular levels, aiming to provide a reference for future research on poultry broodiness.</div></div>","PeriodicalId":20459,"journal":{"name":"Poultry Science","volume":"104 12","pages":"Article 105895"},"PeriodicalIF":4.2,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145160449","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparative genomic analysis of duck plague virus reveals evolutionary divergence between vaccine and contemporary field isolates in Thailand","authors":"Worarat Kruasuwan ,&nbsp;Tantip Arigul ,&nbsp;Piroon Jenjaroenpun ,&nbsp;Thidathip Wongsurawat ,&nbsp;Kanokwan Sangkakam ,&nbsp;Anucha Muenthaisong ,&nbsp;Nattawooti Sthitmatee ,&nbsp;Korakot Nganvongpanit ,&nbsp;Venugopal Nair ,&nbsp;Sittinee Kulprasertsri ,&nbsp;Thaweesak Songserm ,&nbsp;Nisachon Apinda","doi":"10.1016/j.psj.2025.105892","DOIUrl":"10.1016/j.psj.2025.105892","url":null,"abstract":"<div><div>Duck Plague Virus (DPV), an alphaherpesvirus, causes significant morbidity and mortality in waterfowl and remains a persistent threat to duck farming across Asia. This study reports the first complete genomic characterization of DPV isolates from Thailand including a commercial vaccine strain (DPVac) and two contemporary field isolates (DPV7 and DPV8). Using Oxford Nanopore Technologies (ONT) and hybrid Illumina-ONT sequencing, we successfully assembled complete genomes ranging from 160,511 to 163,789 bp. The assembled genomes showed high sequence identity to the European reference strain DEV 2085. Comparative genomic analysis revealed structural differences in the UL and US regions. Phylogenetic reconstruction based on core genome single-nucleotide polymorphisms (SNPs) placed DPV7 within a clade of recent Chinese field strains, while DPV8 clustered closely with vaccine-associated lineages from Germany, India, and Bangladesh. Notably, SNP analysis identified multiple virulence-associated mutations uniquely present in DPV7. These mutations, absent in DPVac and DPV8, were located within or near genes involved in viral replication (UL54), host immune evasion (UL41, UL14), viral entry (UL44, UL8), intracellular trafficking (US3, US8), and virulence modulation (LORF3). These findings suggest that DPV7 may be undergoing adaptive evolution under immune pressure, potentially compromising vaccine effectiveness. Our results underscore the critical need for continuous molecular surveillance and functional studies to evaluate the impact of emerging DPV variants. The complete genome sequences reported herein provide a valuable resource for future research on DPV evolution, diagnostics, and vaccine development in endemic regions.</div></div>","PeriodicalId":20459,"journal":{"name":"Poultry Science","volume":"104 12","pages":"Article 105892"},"PeriodicalIF":4.2,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145200763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploration of microorganism and metabolites relation to the egg production of Shanma ducks based on 16S rRNA gene sequencing and metabolomics","authors":"Sasa Miao,&nbsp;Xiaomei Xu,&nbsp;Tao Zeng,&nbsp;Yong Tian,&nbsp;Tiantian Gu,&nbsp;Li Chen,&nbsp;Jiayi Su,&nbsp;Lizhi Lu,&nbsp;Wenwu Xu","doi":"10.1016/j.psj.2025.105880","DOIUrl":"10.1016/j.psj.2025.105880","url":null,"abstract":"<div><div>Gut microbiota and metabolites play crucial roles in regulating poultry health, metabolism, and egg-laying performance. To elucidate the biological basis underlying differences in laying performance, this study employed 16S rRNA high-throughput sequencing and untargeted liquid chromatography-mass spectrometry (LC-MS/MS) to analyze the gut microbiota and serum metabolome of low-producing (LP) and high-producing (HP) Shanma ducks. The LP and HP groups exhibited significant differences in egg production performance, body size parameters, and slaughter traits. Firmicutes were the dominant phylum in the gut microbiota of both groups. However, Actinobacteria were significantly enriched in the HP group, while Campylobacter was more abundant in the LP group. Correlation analysis revealed a negative association between <em>Campylobacter</em> abundance and egg production, whereas <em>Corynebacterium</em> (belonging to Actinobacteria) showed a positive correlation. Non-targeted serum metabolomic analysis indicated that the differentially expressed metabolites were primarily enriched in nucleotide metabolism, choline metabolism, and glycerophospholipid metabolism pathways. Notably, <em>Campylobacter</em> abundance was negatively correlated with the levels of key metabolites involved in these pathways. Mantel analysis further confirmed a strong correlation between egg production and both gut microbiota composition and serum metabolomic profiles. Collectively, these findings provide new insights into the microbial and metabolic determinants of reproductive performance in ducks, offering a foundation for genetic selection and microbiota-targeted nutritional strategies to enhance laying efficiency in Shanma ducks.</div></div>","PeriodicalId":20459,"journal":{"name":"Poultry Science","volume":"104 12","pages":"Article 105880"},"PeriodicalIF":4.2,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145207348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of inclusion level of black soldier fly larvae protein or oil on broiler growth performance during heat stress","authors":"T. Veldkamp ,&nbsp;A. Rezaei Far ,&nbsp;J.J. Mes ,&nbsp;S. Naser El Deen ,&nbsp;P.G. van Wikselaar ,&nbsp;I. Fodor ,&nbsp;H. Chen","doi":"10.1016/j.psj.2025.105883","DOIUrl":"10.1016/j.psj.2025.105883","url":null,"abstract":"<div><div>Beyond their nutritional value, insects contain bioactive compounds, including chitin, lauric acid, and antimicrobial peptides, and could potentially exert positive effects on animals consuming insect-based diets in health challenging conditions. A total of 648 Ross 308 male chicks were fed four different soybean meal-maize-wheat based diets in which soybean meal or oil was partly replaced by black soldier fly larvae (<strong>BSFL</strong>) protein or oil, respectively, in cyclic heat stress or thermoneutral (control) conditions. BSFL protein or oil was included at 5 and 10 %, and 2 and 4 %, respectively, in a 2 × 2 × 3 factorial design. The growth performance (ADFI, ADG, body weight gain : feed intake ratio (<strong>G:F</strong>), and mortality) was recorded at d 9, 21, and 34. Carcass yields were determined at 35 d of age and blood and ileal tissue samples were collected to examine heat stress-related biomarkers.</div><div>The heat stress challenge was successfully implemented, demonstrated by a significant reduction in ADFI, with numerical reductions in ADG and final BW across the overall trial. The cyclic heat stress applied was mild and chronic, with mortality and removals recorded at 2 %. Broilers exposed to heat stress showed elevated levels of ileum calprotectin, while serum corticosterone levels tended to be lower compared to controls.</div><div>A significant interaction was observed between heat stress, insect product, and inclusion level. In heat stress conditions, the inclusion of BSFL oil led to a numerical increase in ADFI, ADG, and BW, whereas inclusion of BSFL protein resulted in a numerical decrease in BW. BSFL protein at 5 and 10 % and BSFL oil at 2 and 4 % inclusion level did not exhibit notable growth performance benefits in Ross 308 broilers under mild cyclic heat stress conditions. The mild nature of the heat stress challenge may have limited the detection of BSFL product effects, highlighting the need for future investigations under more intense heat stress conditions.</div></div>","PeriodicalId":20459,"journal":{"name":"Poultry Science","volume":"104 12","pages":"Article 105883"},"PeriodicalIF":4.2,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145213452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermal stability of multi-tier layer hen housing with all-year sidewall inlet ventilation system.","authors":"Y J Chen, S Z Deng, Y Wang, C Liu, W X Qin, Y X Wei, Q Tong, B M Li, W C Zheng","doi":"10.1016/j.psj.2025.105887","DOIUrl":"https://doi.org/10.1016/j.psj.2025.105887","url":null,"abstract":"<p><p>Large temperature fluctuations in alternative hen housing threaten poultry welfare and productivity because of temporary and seasonal ventilation adjustments. This study proposes an all-year sidewall inlet ventilation (ASV) system with buffer spaces and constant air inlet to stabilize the incoming airflow and minimize thermal variations at the hen level. The ASV system was evaluated in a commercial multi-tier layer house housing 24,000 hens in a temperate monsoon climate. Over 407 days, 58 sensors monitored outdoor conditions, buffer spaces, sidewall inlets, and indoor zones (between/within colony rows), with egg production and feed intake recorded. Results indicated without supplementary heating, indoor air temperatures ranged from 18.3 to 29.8°C, while outdoor temperature fluctuated from -22.0 to 37.3°C. The diurnal temperature fluctuation indoors remained within 3°C for 77.4 % of the period, peaking at 4.7°C. Average diurnal fluctuations indoors were 2.4°C (winter), 2.0°C (transition season), and 2.8°C (summer), compared to outdoors at 12.9°C, 14.0°C, and 11.6°C, respectively. During a 21.9°C outdoor diurnal fluctuation, variations in buffer spaces, sidewall inlets, and indoors measured 17.7°C, 12.2°C, and 4.7°C, showing significant gradation (P < 0.05). Summer indoor temperatures exceeded 26°C on 112 days due to cooling-activation at 28.0°C and reduced buffer space residence times. In the hottest month, interstitial zones between colony rows averaged 26.5 ± 1.29°C and 80 % ± 4.5 % RH. Microclimates within colony rows exhibited 1.5°C warmer and 9 % lower in RH than interstitial spaces (P < 0.05). Longitudinal temperature gradients peaked at the rear section, whereas lateral distributions were symmetric, with the middle column 0.7°C cooler than sides (P < 0.05). Diurnal feed intake deviation from the theoretical curve strongly correlated with 7-day mean, maximum, and minimum indoor temperatures (P < 0.001). In summary, the ASV system maintained indoor diurnal temperature fluctuation within 4.7°C across season, providing an effective ventilation strategy to support the transition to cage-free systems.</p>","PeriodicalId":20459,"journal":{"name":"Poultry Science","volume":"104 11","pages":"105887"},"PeriodicalIF":4.2,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145200634","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}