Ken R Ito, Tomonori Sato, Chihiro Osawa, Jun Watanabe, Hiroaki Hamaguchi, Takashi Matsuzaki, Hiroya Nakamura, Tatsuki R Kataoka, Takahiro Nii, Katsuyoshi Sato, Masaki Yokoo
{"title":"Sake Lees: A Potential Feed Ingredient to Enhance Intestinal Barrier Function in Indigenous Meat-type Chickens.","authors":"Ken R Ito, Tomonori Sato, Chihiro Osawa, Jun Watanabe, Hiroaki Hamaguchi, Takashi Matsuzaki, Hiroya Nakamura, Tatsuki R Kataoka, Takahiro Nii, Katsuyoshi Sato, Masaki Yokoo","doi":"10.2141/jpsa.2025023","DOIUrl":"10.2141/jpsa.2025023","url":null,"abstract":"<p><p>Food loss and waste (FLW) is a serious problem worldwide. One proposed solution is to divert FLW to livestock feed. From the viewpoint of food mileage, it is increasingly recommended that the distance that food travels between the sites of production and consumption is as short as possible (the consumption of local food products). Sake, a traditional Japanese alcoholic beverage, is produced in various regions of Japan. Sake lees, the leftover paste from sake production, is generated as a byproduct and has gained attention for its high nutritional value and potential as a functional food. Local sake lees was fed to meat-type chickens and its potential as a feed ingredient was evaluated. Experimental diets consisting of 20%, 30%, or 40% sake lees were produced by adding local sake lees to commercial feed. These were then fed to 3-week-old indigenous meat-type chickens for 2 weeks. Growth performance and expression of genes associated with intestinal barrier function were then analyzed. Body weight gain was identical between chickens fed any of the sake lees-supplemented diets and control chickens. Gastrointestinal structure was also not changed by sake lees-supplemented diets. Gene expression levels of claudin-5, cadherin1, occludin, avian beta-defensin 13 (AvBD13), and transforming growth factor-β1, which are related to intestinal barrier function, were higher in the group fed the 20% and 30% sake lees diets compared to those of the control group, but were similar between the group fed the 40% sake lees diet and those of the controls. Expression levels of AvBD1, 2, 5, 6, and 7 were also reduced in animals fed any of the three sake lees-supplemented diets. These results suggested that dietary supplementation with 20%-30% sake lees improved physical intestinal barrier function in indigenous meat-type chickens during short-term feeding.</p>","PeriodicalId":16883,"journal":{"name":"Journal of Poultry Science","volume":"62 ","pages":"2025023"},"PeriodicalIF":1.6,"publicationDate":"2025-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12390738/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144958460","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Fasting Induces Gene Expression of Insulin-like Growth Factor-binding Proteins in Skeletal Muscles of Chicks.","authors":"Asmaa S El-Far, Haruki Osada, Yumi Sakanashi, Takaoki Saneyasu, Kazuhisa Honda","doi":"10.2141/jpsa.2025022","DOIUrl":"10.2141/jpsa.2025022","url":null,"abstract":"<p><p>In mammals, evidence suggests that insulin-like growth factor-binding proteins (IGFBPs) affect skeletal muscle growth in an autocrine and paracrine manner. In the present study, fasting induced significant transcriptional changes in IGFBP genes in the skeletal muscles of layer and broiler chickens. Twelve hours of fasting significantly increased mRNA levels of IGFBP-1 in the biceps femoris (BF; largest skeletal muscle in the thigh) of both chicken types. mRNA levels of IGFBP-2 in both the pectoralis major (PM; breast muscle) and the BF significantly increased in layer chicks and tended to increase in broiler chicks. Fasting significantly decreased mRNA levels of IGFBP-3 in the BF and PM of both chicken type. mRNA levels of IGFBP-4 and -5 differed responses in the PM and BF of layer and broiler chicks. mRNA levels of most IGFBP genes were not affected by insulin-like growth factor-1 (IGF-1) in chicken embryonic myotubes, suggesting that skeletal muscle IGFBPs were transcriptionally regulated in an IGF-1-independent manner. Overall, these findings suggested that IGFBP-1, -2, and -3, which were expressed in skeletal muscles, played conserved roles in layer and broiler chicks.</p>","PeriodicalId":16883,"journal":{"name":"Journal of Poultry Science","volume":"62 ","pages":"2025022"},"PeriodicalIF":1.6,"publicationDate":"2025-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12326139/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144817026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Qingyun Cao, Yaru Song, Jiarong Fang, Zemin Dong, Changming Zhang, Hui Ye, Jianjun Zuo, Weiwei Wang
{"title":"Xylooligosaccharide Supplementation Mitigates Growth Performance Impairment and Intestinal Injuries in Enterohemorrhagic <i>Escherichia coli</i>-Challenged Broilers.","authors":"Qingyun Cao, Yaru Song, Jiarong Fang, Zemin Dong, Changming Zhang, Hui Ye, Jianjun Zuo, Weiwei Wang","doi":"10.2141/jpsa.2025021","DOIUrl":"10.2141/jpsa.2025021","url":null,"abstract":"<p><p>Xylooligosaccharide (XOS) is a typical prebiotic; however, whether it protects chickens from enterohemorrhagic <i>Escherichia coli</i> (EHEC) challenge remains unknown. This study investigated the protective effects of XOS on the growth and gut health of EHEC-challenged broilers. A total of 270 1-day-old broilers were divided into three groups (nine replicates per group): negative control (were not challenged), positive control (EHEC-challenged from days 8 to 11), and XOS (EHEC-challenged broilers supplemented with 1.6 g/kg XOS). Samples were collected from broilers at 14 days. XOS addition alleviated EHEC-induced decline in growth performance, liver index, and the villus height:crypt depth ratio in both the duodenum and ileum of broilers. XOS also attenuated the increase in the relative mRNA expression of the ileal proinflammatory cytokine interleukin 6 and the tight junction protein occludin in EHEC-challenged broilers. Microbiota analysis revealed that EHEC challenge reduced or tended to reduce the abundance of several beneficial bacteria (such as Firmicutes, <i>Fournierella</i>, and <i>Lysinibacillus</i>) and increased or tended to increase the abundance of multiple harmful bacteria (such as Proteobacteria, <i>Aquabacterium</i>, <i>Methylotenera</i>, and <i>Arthrobacter</i>) in the ileum. However, XOS addition mitigated these changes and downregulated or tended to downregulate certain disease-related pathways of the ileal microbiota. In conclusion, XOS supplementation mitigated poor growth performance and intestinal damage in EHEC-challenged broilers, and was probably involved in the attenuation of gut microbiota disturbances that might protect against EHEC infection. These findings provide a basis for the application of XOS to limit the risk of EHEC infection.</p>","PeriodicalId":16883,"journal":{"name":"Journal of Poultry Science","volume":"62 ","pages":"2025021"},"PeriodicalIF":1.6,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12303608/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144760413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 Water Salinity, Dietary Potassium Carbonate, Vitamin D<sub>3</sub> Levels, and Vitamin D<sub>3</sub> Form (1α-Hydroxycholecalciferol) on Calcium and Phosphorus Digestibility and Tibia Bone Properties in Broilers.","authors":"Hossein Esmaeili, Farzad Bagherzadeh-Kasmani, Saeed Khalaji, Hossein N Younesi, Mahmood Ghazaghi","doi":"10.2141/jpsa.2025020","DOIUrl":"10.2141/jpsa.2025020","url":null,"abstract":"<p><p>This study aimed to assess the joint impact of water salinity, K<sub>2</sub>CO<sub>3</sub>, vitamin D<sub>3</sub> levels, and inclusion of 1α-hydroxycholecalciferol (1αOHD3) on broiler tibiae. A total of 1200 one-day-old male Ross broiler chickens were given four different levels of vitamin D<sub>3</sub> (2000, 5000, 7000, and 5000 IU + 20 µg/kg 1αOHD<sub>3</sub>), three levels of water salinity (WS) (low, moderate, high), and two concentrations of K<sub>2</sub>CO<sub>3</sub> (0 and 2.5 g/kg). Supplementation with 1αOHD<sub>3</sub> reduced body weight and increased the feed conversion ratio throughout the experimental period. Birds consuming water with low salinity up to 21 days of age presented significantly lower body weight and feed intake, but a higher feed conversion ratio. Water consumption was reduced by increasing WS during the first week, but increased during the grower and finisher periods. K<sub>2</sub>CO<sub>3</sub> lowered water consumption. Higher WS increased litter moisture by 35% and 27% at 14 and 28 days of age, along with alkaline phosphatase (ALP) activity, but reduced plasma Ca, P, and K. Inclusion of K<sub>2</sub>CO<sub>3</sub> lowered plasma Ca, P, and ALP activity at 14 days, but increased plasma K. Apparent total tract retention (TTR) of P decreased by increasing D<sub>3</sub> levels and adding 1αOHD<sub>3</sub> on day 14. Increasing WS linearly decreased TTR of P on day 14 and TTR of Ca and P on day 28, causing a significant loss of tibia ash, Ca, and P. Tibial shear force was reduced by increasing dietary D<sub>3</sub> on day 28. Tibial shear force and stress were decreased, while its elongation was improved, by increasing WS at 14 days of age. In conclusion, high WS lowered bird weight gain, increased water consumption and litter moisture, and reduced TTR of Ca and P, which significantly diminished tibia ash, Ca, and P, as well as tibial mechanical properties.</p>","PeriodicalId":16883,"journal":{"name":"Journal of Poultry Science","volume":"62 ","pages":"2025020"},"PeriodicalIF":1.6,"publicationDate":"2025-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12268207/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144675044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Expression of Olfactory Sense-Related Genes in Chicken Olfactory Epithelium.","authors":"Kazushi Koyama, Fuminori Kawabata","doi":"10.2141/jpsa.2025019","DOIUrl":"10.2141/jpsa.2025019","url":null,"abstract":"<p><p>Olfaction plays a key role in the selection and acquisition of feed as well as its vision and gustation. Although olfactory behavior in chickens is speculated to depend on olfactory receptors, trace-amine-associated receptors (TAARs), and its signaling pathway, insufficient information is available regarding the expression of these molecules in chicken olfactory epithelium. Here, we investigated whether genes encoding representative olfactory receptors, TAARs, and olfactory signaling pathway molecules were expressed in this tissue. Based on real-time quantitative polymerase chain reaction and agarose gel electrophoresis, we confirmed the expression of 18 olfactory receptors, three TAARs, and six signaling pathway genes, suggesting that chickens possess molecular mechanisms for capturing odorants and transducing olfactory signals.</p>","PeriodicalId":16883,"journal":{"name":"Journal of Poultry Science","volume":"62 ","pages":"2025019"},"PeriodicalIF":1.8,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12266935/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144675045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Takahiro Nii, Takumi Sugiura, Naoki Suzuki, Naoki Isobe, Yukinori Yoshimura
{"title":"Effects of Aging on the Microbiota and Inflammatory Status of the Intestinal and Oviductal Mucosa in Laying Hens.","authors":"Takahiro Nii, Takumi Sugiura, Naoki Suzuki, Naoki Isobe, Yukinori Yoshimura","doi":"10.2141/jpsa.2025018","DOIUrl":"10.2141/jpsa.2025018","url":null,"abstract":"<p><p>Aging and inflammation of the intestinal and oviductal mucosa reduce egg production in laying hens. In mammals, microbiota changes in the intestine and reproductive mucosa are linked to aging and mucosal inflammation, but this relationship remains unclear in hens. The present study aimed to investigate the impact of aging on microbiota and inflammation in the intestinal and oviductal mucosa of hens. Sixteen White Leghorn hens aged ~280 days (young) and ~730 days (aged) were used. Bacterial DNA was extracted from feces and vaginal swabs for 16S rRNA amplicon sequencing. Intestinal (ileum and cecum) and oviductal (uterus and vagina) tissues were processed for histological analysis. Real-time PCR was performed to profile pro- and anti-inflammatory cytokines, tight junction-related molecules, and calbindin in the uterus. Whereas microbial diversity and composition in the vagina did not change with age; alpha-diversity of intestinal bacteria was lower in the aged group, as suggested by 46 genera showing a decrease and five an increase. The morphology of the ileum mucosa deteriorated, with transforming growth factor (<i>TGF</i>)<i>β3</i> being upregulated and claudin (<i>CLA</i>)<i>3</i> being downregulated in the intestine of the aged group. Finally, fibrosis progressed with age in the uterine mucosa, along with overexpression of <i>IL-1β</i>, <i>TGFβ3</i>, <i>TGFβ4</i>, and <i>CLA1</i>, but downregulation of calbindin in the oviductal mucosa. These results suggest that aging may impair intestinal and oviductal health through mucosal inflammation in both the intestine and oviduct of laying hens. This change may be related to alterations in the intestinal microbiota but appears less evident in the vagina.</p>","PeriodicalId":16883,"journal":{"name":"Journal of Poultry Science","volume":"62 ","pages":"2025018"},"PeriodicalIF":1.8,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12245063/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144626614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nuwan C Chathuranga, Myunghwan Yu, Yu-Bin Kim, Hyun-Min Cho, Shan R Nawarathne, Elijah O Oketch, Jung-Min Heo
{"title":"Optimizing Standardized Ileal Digestible Methionine Requirements of White Pekin Ducks in the First 21 Days Post-Hatch.","authors":"Nuwan C Chathuranga, Myunghwan Yu, Yu-Bin Kim, Hyun-Min Cho, Shan R Nawarathne, Elijah O Oketch, Jung-Min Heo","doi":"10.2141/jpsa.2025017","DOIUrl":"10.2141/jpsa.2025017","url":null,"abstract":"<p><p>The current study investigated the optimal standardized ileal digestible (SID) methionine (Met) requirement for the growth performance of white Pekin ducks from hatching to 21 days of age. A total of 288 one-day-old male white Pekin ducklings were initially weighed and randomly assigned to six dietary groups, with six replicates per group. Eight ducklings were housed in each floor cage, pre-littered with rice hulls. Basal diets (corn-soybean-based) included 0.30%, 0.35%, 0.40%, 0.45%, 0.50%, and 0.55% SID Met, representing the dietary treatment groups. Ducklings were offered unrestricted access to experimental diets and freshwater for the duration of the study. Body weight and feed intake were recorded weekly, and the average daily gain and feed conversion ratios were calculated. Overlapping linear- and quadratic-plateau regression models were employed to estimate SID Met requirements. Final body weight, average daily gain, and feed conversion ratios in white Pekin ducks exhibited significant quadratic growth with increasing dietary SID Met concentrations. In conclusion, estimated SID Met requirements for white Pekin ducks from hatching to 21 days, based on an average of linear and quadratic model responses, were determined to be 0.51% for body weight improvement, 0.51% for average daily gain, and 0.50% for feed conversion efficiency. These findings provided invaluable insight into optimized nutritional strategies for early growth performance in white Pekin ducks.</p>","PeriodicalId":16883,"journal":{"name":"Journal of Poultry Science","volume":"62 ","pages":"2025017"},"PeriodicalIF":1.6,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12130444/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144234409","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Osmotic Stress-induced Gene Expression in the Diencephalon, Kidney, Liver, and Breast Muscle of Chicks.","authors":"Yuhui Zhang, Kaoruko Murata, Junya Takegaki, Takaoki Saneyasu, Kazuhisa Honda","doi":"10.2141/jpsa.2025016","DOIUrl":"10.2141/jpsa.2025016","url":null,"abstract":"<p><p>Endogenous water production is an important response for inducing water acquisition in birds, with proteins and lipids being major sources of endogenous water. However, the roles of protein and lipid metabolism-related gene expression in the regulation of their body fluid balance have not been investigated. This study aimed to clarify the roles of protein and lipid metabolism-related genes in osmoregulation in chicks. In Experiment 1, we examined the effects of 12 h of water deprivation on the mRNA levels of protein and lipid metabolism-related genes and feed intake in chicks. Feed intake was significantly decreased by water deprivation throughout the experimental period. The mRNA levels of vasotocin in the diencephalon were significantly increased by water deprivation. The mRNA levels of carnitine palmitoyltransferase 1A (CPT1A), the rate-limiting enzyme of mitochondrial fatty acid oxidation, were significantly increased by water deprivation in the liver, breast muscle, and diencephalon of the chicks. The mRNA levels of atrogin-1, a regulatory enzyme of the ubiquitin proteasome-system, were significantly increased by water deprivation in the breast muscle of the chicks. In contrast, the mRNA levels of fatty acid synthase, the rate-limiting enzyme of fatty acid synthesis, were significantly decreased by water deprivation in the liver of the chicks. In Experiment 2, the effects of intraperitoneal administration of hypertonic saline were examined under feed and water-deprived conditions. The mRNA levels of renal aquaporin 1, breast muscle atrogin-1, and diencephalon CPT1A were significantly increased 1 h after hypertonic saline injection. These results suggest that osmotic stress may induce protein catabolism in the skeletal muscle and fatty acid catabolism in the diencephalon of the chicks.</p>","PeriodicalId":16883,"journal":{"name":"Journal of Poultry Science","volume":"62 ","pages":"2025016"},"PeriodicalIF":1.6,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12092976/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144142837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 Dietary Energy Levels on the Reproductive Performance in Breeding Pigeons, and Growth Performance and Intestinal Health in Squabs.","authors":"Kang Cheng, Jingyi Niu, Daizi Hu, Jinxiu Yao, Hongyue Zhao, Mingjun Yang, Jinrong Wang, Yong Zhang","doi":"10.2141/jpsa.2025015","DOIUrl":"https://doi.org/10.2141/jpsa.2025015","url":null,"abstract":"<p><p>The present study evaluated the effect of different dietary energy levels on reproductive performance in breeding pigeons, as well as growth performance and intestinal health in squabs. In total, 180 pairs of 12-month-old White King breeding pigeons were randomly assigned to five dietary treatments, each with six replicates of six pairs of birds, and fed diets containing 11.60, 11.80, 12.00, 12.20, and 12.40 MJ/kg for 46 days, respectively. Energy content beyond 12.00 MJ/kg shortened the laying interval (linear and quadratic, <i>P</i><0.05), while boosting 38-day, 42-day, and 46-day laying rates (linear, <i>P</i><0.05) in breeding pigeons. Except for the early stage of lactation, feed intake showed a linear and/or quadratic negative relationship with dietary energy content (<i>P</i><0.05). Body weight at 1 week of age, average daily gain during the early growth stages, and serum total protein of squabs increased with increasing dietary energy content (linear, <i>P</i><0.05); whereas alanine aminotransferase activity decreased (quadratic, <i>P</i><0.05). Jejunal villus height and villus height to crypt depth ratio in squabs increased with increasing dietary energy levels (linear and quadratic, <i>P</i><0.05), particularly in the 12.40 MJ/kg group. Higher dietary energy content increased jejunal malondialdehyde content (linear, <i>P</i><0.05), total superoxide dismutase (T-SOD), and glutathione peroxidase activities (linear, <i>P</i><0.05), as well as ileal T-SOD (linear and quadratic, <i>P</i><0.05) and catalase (quadratic, <i>P</i><0.05) activities in squabs. Hence, intakes greater than 12.00 MJ/kg altered the jejunal redox status. Finally, higher dietary energy content improved reproduction in breeding pigeons and intestinal morphology in squabs. Overall, 12.00 MJ/kg strikes the right balance as it promotes reproductive performance in breeding pigeons and intestinal health in squabs.</p>","PeriodicalId":16883,"journal":{"name":"Journal of Poultry Science","volume":"62 ","pages":"2025015"},"PeriodicalIF":1.8,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12009656/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144027179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}