Evaluation of regional climate scenario data for impact assessment of climate change on rice productivity in Korea     

Junhwan Kim  Wangyu Sang  Pyeong Shin  Hyeounsuk Cho  Myungchul Seo  Byounghyun Yoo  Kwang Soo Kim 《Journal of Crop Science and Biotechnology》2015,18(4):257-264

Spatial evaluation of the uncertainty associated with climate data would allow reliable interpretation of simulation results for regional crop yield using gridded climate data as input to a crop growth model. The objective of this study was to examine the spatial uncertainty of regional climate model data through determining optimal seeding date with the ORYZA2000 model for assessment of climate change impact on rice productivity in Korea. The optimal seeding date was determined at each grid point using regional climate model outputs under the RCP 8.5 scenarios. In major rice production areas such as inland plain regions, where temperatures of regional climate data were relatively accurate, the optimal seeding date determined using those gridded data were reasonable. However, areas with complex terrains including areas near bodies of water, e.g. coastal areas, riverbasins, lakes, and mountainous areas, had a relatively large uncertainty of the optimal seeding date determined using the regional climate data. These results indicated that the uncertainty of regional climate data at a high spatial resolution of 12.5 km should be taken into account in the regional impact assessment based on crop growth simulations in Korea. In addition, further studies would be merited to assess the impact of climate change on rice yield at an ultra-high spatial resolution of 1 km in Korea. Crop yields were projected to decrease after the 2020s when crop yield simulations from inland plain areas were considered, which suggested that adaptation strategies should be established and implemented in the near future.  相似文献   

Effect of dietary fermented garlic by Weissella koreensis powder on growth performance, blood characteristics, and immune response of growing pigs challenged with Escherichia coli lipopolysaccharide     

Wang JP  Yoo JS  Jang HD  Lee JH  Cho JH  Kim IH 《Journal of animal science》2011,89(7):2123-2131

Two experiments were conducted to investigate the effect of fermented garlic by Weissella koreensis powder (WKG) on pig growth performance and immune responses after an Escherichia coli lipopolysaccharide (LPS) challenge. In Exp. 1, 120 growing barrows (23.5 ± 0.5 kg of BW and 56 d of age) were used in a 35-d experiment to determine the optimal amounts of WKG. Pigs were randomly allotted to 1 of 5 treatments with 6 replicate pens and 4 pigs per pen. Dietary treatments included 1) NC (negative control; basal diet without antibiotics), 2) PC (positive control; basal diet + 1 g of tylosin/kg), 3) WKG1 (basal diet + 1 g of WKG/kg), 4) WKG2 (basal diet + 2 g of WKG/kg), and 5) basal diet + 4 g of WKG/kg. At the end of the feeding period, 12 pigs each were selected from the NC and WKG2 treatment groups, and 6 pigs were injected with LPS (50 μg/kg of BW) and the other 6 pigs with an equivalent amount of sterile saline, resulting in a 2 × 2 factorial arrangement of treatments. Blood samples and rectal temperature data were collected at 0, 2, 4, 6, 8, and 12 h after challenge. The ADG of pigs fed WKG- and antibiotic-supplemented diets was greater (P<0.05) than NC from d 14 to 35 and the overall phase, but no dosage-dependent effects were observed. At the end of the experiment, the fecal E. coli count was linearly reduced by the increasing amounts of WKG at d 35 (P=0.01). Challenge with LPS increased white blood cell counts at 6 and 8 h (P<0.01) and depressed lymphocyte concentration at 4, 8, and 12 h (P<0.01). During challenge, LPS injection increased rectal temperature at 2, 4, 6, and 8 h postchallenge (P<0.05), and WKG2 alleviated (P<0.05) the increase in the temperature at 2 h postchallenge. The LPS injection increased plasma tumor necrosis factor-α and IGF-1 concentrations at 2, 4, 6, 8, and 12 h (P<0.01), whereas an alleviating effect of WKG was observed at 4, 6, and 8 h after LPS challenge (P<0.05). At 2, 4, and 6 h postchallenge, concentration of cluster of differentiation-antigen-4-positive cells and cluster of differentiation-antigen-8-positive cells (CD4(+) and CD8(+), respectively) increased in the LPS treatments (P<0.05), and the WKG2 boosted this effect (P<0.05). In conclusion, dietary supplementation of WKG2 in growing pigs can improve ADG and have a beneficial effect on the immune response during an inflammatory challenge.  相似文献   

Molecular identification of duck and quail common cytokine receptor γ chain genes     

Jeong J  Lee C  Yoo J  Koh PO  Kim YH  Chang HH  Choe NH  Lillehoj HS  Min W 《Veterinary immunology and immunopathology》2011,140(1-2):159-165

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Ribosomal protein s3 immunoreactivity in the young, adult and aged gerbil hippocampus     

Lee CH  Yoo KY  Choi JH  Hwang IK  Choi SY  Won MH 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2011,73(3):361-365

Ribosomal protein S3 (rpS3) is well known to participate in DNA repair mechanisms. In the present study, we compared rpS3 immunoreactivity and its protein levels in the hippocampus among young, adult and aged gerbils. In the postnatal month (PM) 3 group as the young, rpS3 immunoreaction was observed in pyramidal and non-pyramidal cells of the hippocampus proper and in granule and polymorphic cells of the dentate gyrus. In the PM 12 group as adult and 24 group as the aged, rpS immunoreactivity in the hippocampus was decreased compared to the PM 3 group. Western blot analysis showed that rpS3 levels were decreased with time; lowest at PM 24. These results indicate that rpS3 immunoreactivity and protein levels were markedly decreased in the aged gerbil hippocampus.  相似文献   

Effects of fermented garlic powder supplementation on growth performance, blood profiles and breast meat quality in broilers   总被引：1，自引：0，他引：1  

X. Ao  J.S. Yoo  T.X. Zhou  J.P. Wang  Q.W. Meng  L. Yan  J.H. Cho  I.H. Kim 《Livestock Science》2011,141(1):85-89

The aim of this study was to investigate the effects of dietary supplementation with fermented garlic powder (FGP) on growth performance, blood profiles and breast meat quality in broilers. A total of 500 broilers were randomly allotted to 4 treatments with 5 replications per treatment and 25 chicks per pen. The experiment lasted for 5 weeks and dietary treatments were as follows: 1) CON (basal diet); 2) FGP1 (basal diet + 1 g/kg fermented garlic powder); 3) FGP2 (basal diet + 2 g/kg fermented garlic powder); 4) FGP4 (basal diet + 4 g/kg fermented garlic powder). No effects were observed (P > 0.05) in body weight gain (BWG), feed intake (FI) or feed conversion ratio (FCR) throughout the whole experiment. The white blood cell (WBC) counts, lymphocyte and immunoglobulin G (IgG) was increased (P < 0.05) in response to FGP treatments. Broilers had lower (P < 0.05) total cholesterol, triglyceride, low-density lipoprotein (LDL) cholesterol and cortisol concentrations in blood when they were provided with FGP2 and FGP4 diets. Compared with CON, FGP2 and FGP4 treatments decreased (P < 0.05) TBARS and pH in breast meat. In conclusion, FGP administration had no effect on growth performance but improved immunity and meat quality as well as decreased cholesterol and cortisol in blood.  相似文献   

Reevaluation of the Phosphorus Requirement of Juvenile Olive Flounder Pavalichfhys olivaceus and the Bioavailability of Various Inorganic Phosphorus Sources     

Se-Min  Choi  Kang-Woong  Kim Yong-Jin  Kang Xiaojie  Wang  Jae-Won  Kim  Gwan-Yeol  Yoo Sungchul C.  Bai 《Journal of the World Aquaculture Society》2005,36(2):217-222

A 6‐wk feeding trial was conducted to reevaluate the phosphorus (P) requirement of juvenile olive flounder and the bioavailability of various inorganic phosphorus sources (IPS). Eight experimental diets were prepared such that all diets contained the same amount of calories, nitrogen, and calcium. Each diet included 0.33% total phosphorus (TP) and 0.60 % total calcium supplied by the basal diet. The eight experimental diets were: the basal diet without P supplementation (BD), three diets consisting of the BD supplemented with NaH,PO₄.2H₂O (NaP_0.45 NaP_0.57 or NaP_1.14) to supply 0.45, 0.57 or 1.14% TP, and four diets consisting of the BD supplemented with K₂HPO₄ (KP_0.57), Ca(H₂PO₄)_;H₂O (Cap_0.57), CaH₂PO_4;2H₂O (CaHP_0.57) or flounder bone meal (FBP_0.57) to supply 0.57% TP. Fish (N = 480)averaging 4.02 ± 0.03 g (Mean ± SD) were distributed randomly into 24 aquaria (20 fish per aquarium), and were fed one of the eight experimental diets in triplicate groups. The weight gain (WG), specific growth rate (SGR), protein efficiency ratio (PER) and feed efficiency (FE) of fish fed the NaP_0.57 diet were significantly higher than those of fish fed the BD, NaP_1.14, KP_0.57, CaHP_0.57 and FBP_0.57 diets (P > 0.05). There was no significant difference in WG, SGR, PER, and FER among fish fed the Nap_0.45, NaP_0.57 and Cap_0.57, diets. Whole body P retention (WBP_ret) in fish fed the Nap_0.57 diet was significantly higher than in fish fed the BD, NaP_1.14, KP_0.57 CaHP_0.57 and FBP_0.57diets (P > 0.05). There was no significant difference in WBP_ret among fish fed the NaP_0.47, NaP_0.57, and CaP_0.57, diets. The ability of the fish to digest the phosphorus in the NaP_0.45, Nap_0.57, NaP_1.14, and CaP_0.57 diets was significantly better than that of fish fed the other diets (P > 0.05). These results indicated that the dietary P requirement for juvenile olive flounder could be 0.45457%. Also, NaH,PO_; 2H₂O and Ca(H₂PO₄)_;H₂O appeared to have a better bioavailability than the other P sources in juvenile olive flounder.  相似文献   

A high fiber diet responsive case in a poodle dog with long-term plant eating behavior     

Kang BT  Jung DI  Yoo JH  Park C  Woo EJ  Park HM 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2007,69(7):779-782

An 11-year-old, castrated male Miniature Poodle dog was referred due to daily plant eating followed by vomiting for 7 years. Each time the dog went out for a walk, he had been munched grass, and then vomited. There were no abnormal findings on medical examinations. Through behavior examination and consultation, we diagnosed this dog as having a plant eating problem. Because we assumed that the dog had eaten plants to supply of dietary deficiency or relieve digestive problems, advised the owner to discontinue supplying previous diet and to feed high-fiber diet. On the follow up, the owner said that the dog had not eaten plants and vomited from 3 days after initial dietary change. The dog has not shown any clinical signs for 13 months. This clinical finding shows a possibility that deficient diet, especially fiber, relates to the plant eating behavior of a dog.  相似文献   

Effects of dietary lysine supplementation in cats with enzootic upper respiratory disease     

Maggs DJ  Sykes JE  Clarke HE  Yoo SH  Kass PH  Lappin MR  Rogers QR  Waldron MK  Fascetti AJ 《Journal of Feline Medicine and Surgery》2007,9(2):97-108

To determine the effectiveness of dietary lysine supplementation in cats with enzootic upper respiratory disease (URD), 50 cats were fed a ration containing 11 or 51 g lysine/kg diet for 52 days. Food intake, body weight, clinical signs, plasma amino acid concentrations and presence of Chlamydophila felis or feline herpesvirus (FHV)-1 DNA within the conjunctival fornix were assessed. Food and lysine intake of both dietary groups decreased between days 17 and 22, coinciding with peak disease and viral presence. Mean disease score for cats fed the supplemented ration (0.94) was higher than for those fed the basal diet (0.21); however, this could be attributed to a small subset of male cats which demonstrated fighting behavior that may have contributed to stress within that cage. FHV-1 DNA was detected on 12 occasions in six cats receiving the supplemented diet and on one occasion in one cat fed the basal diet. C felis DNA was never detected. Mean plasma arginine concentration was lower and plasma lysine concentration was higher in supplemented cats. Mean plasma arginine concentration declined throughout the study in both dietary groups. Data from the present study raise important questions but do not permit a definitive conclusion regarding the efficacy of dietary lysine supplementation in cats with enzootic URD.  相似文献   

Transdifferentiation of porcine satellite cells to adipoblasts with ciglitizone     

Singh NK  Chae HS  Hwang IH  Yoo YM  Ahn CN  Lee SH  Lee HJ  Park HJ  Chung HY 《Journal of animal science》2007,85(5):1126-1135

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Assessing PCV2 antibodies in field pigs vaccinated with different porcine circovirus 2 vaccines using two commercial ELISA systems     

Min-Kyoung Shin  Seung Hyun Yoon  Myung Hwui Kim  Young Soo Lyoo  Seung Won Suh  Han Sang Yoo 《Journal of veterinary science (Suw?n-si, Korea)》2015,16(1):25-29

Porcine circovirus type 2 (PCV2) is the primary causative agent for post-weaning, multisystemic, wasting syndrome. Consequently, serologic detection of and vaccination against PCV2 are important for the swine industry. Among several serological tests, the enzyme-linked immunosorbent assay (ELISA) is commonly used to measure anti-PCV2 antibody levels. In the present study, we used two commercial ELISA systems to comparatively evaluate anti-PCV2 antibodies in field pigs treated with three different PCV2 vaccines. Among a total of 517 serum samples, the results of the two ELISAs were fully concordant for 365 positive and 42 negative samples, indicating 78.7% agreement. In addition, the Pearson coefficient (0.636) indicated a moderate correlation between data from the two ELISAs. Results from the farms with pigs vaccinated with the three different PCV2 vaccines demonstrated that most of the vaccinated animals underwent seroconversion. However, the increase and duration of antibody titers varied depending on the vaccine, the presence of maternal antibodies, and the vaccination program. PCV2 serologic status and anti-PCV2 antibody levels of herds from this study could be utilized to determine the best timing for vaccination and assessing vaccination compliance.  相似文献