Park, Hyung Soo;Choi, Ki Choon;Yang, Seung Hak;Jung, Jeong Sung;Lee, Bae Hun
Journal of The Korean Society of Grassland and Forage Science
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v.42
no.1
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pp.26-31
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2022
This study was carried out to evaluate the growth characteristics and forage yield potential for warm season grass as emergency forages. The experimental design was a randomized block design (RBD) with three replications. Two barnyard millet (Echinochloa species cv. Shirohie and Jeju native), a pearl millet (Pennisetum glaucum cv Feed milk 2) a proso millet (Panicum miliaceum cv Native), a teffgrass (Eragrostis tef cv. Tiffany) and a kleingrass (Panicum coloratum cv. Selection 75) were compared for forage production and quality at the Mid regions of Korea. Warm season forage crops were sown on May 21 and June 23 respectively, and in 2021, it was sown twice on May 21 and June 21 The number of days to seedling emergence for barnyard millet and teffgrass was observed approximately 10 and 3 days after seeding, respectively. The cultivation period from seeding to harvest was within 60 days for all entry spices except for the late-heading type barnyard millet (within 84 days). As for the dry matter yield by seeding date, the dry matter yield of the late-heading type barnyard millet in May seeding was the highest at 23,872 kg/ha, and the kleingrass was the lowest at 3,888 kg/ha. For the June seeding, the dry matter yield of the late-heading type barnyard millet was 17,032 kg/ha, the highest, and the proso millet, teffgrass and kleingrass showed the lowest at 5,468, 5,442, and 5,197 kg/ha, respectively. The crude protein (CP) content was varied by warm season grass species, but the early-heading type barnyard millet, teffgrass, and kleingrass showed the highest tendency, and the late-heading type barnyard millet showed the lowest at 5.7~5.9%. Neutral detergent fiber (NDF) and acid detergent fiber (ADF) content did not show a significant difference between the seeding in May, but kleingrass in June sowed lower than the others.
This study was conducted to identify the correlation of bacterial phytase ($Transphos^{(R)}$) to the calcium level in feed. Of all 21-week-old 720 HyLine brown laying hens, 2 birds of similar weight were placed on each individual cage. The experiment was conducted by $3{\times}2{\times}3$ factorial design with including 3 different levels of phytase (0, 300, and 1,000 DPU/kg), 2 different levels of calcium (3.5% and 4.0%), and 3 different levels of no NPP addition 0% (0.095 NPP), 0.5% (0.185% NPP), and 1.0% (0.275% NPP). The feeding trial maintained the ME level of 2,800 kcal/kg and 16% for crude protein. The diet was fed ad libitum and 17 hours of lighting was provided throughout the experimental period. Egg production seemed to increase, in the 300 DPU of bacterial phytase added group and the cracked egg tended to reduce in Transphos added group. The egg productivity between treatment groups did not show significant difference by dietary calcium level, whereas non NPP added group (0.095% NPP) was found to be low compared to NPP added groups (P<0.05). The highest mean egg weight and the highest daily egg mass were detected in 300 DPU phytase added group. Although the mean egg weight was significantly higher in treatment groups fed with 3.5% calcium containing feeds (P<0.05), daily egg mass was no among treatment groups. The mean egg weight and daily egg mass were the lowest in non NPP added group (0.095% NPP) compared to other treatment groups (P<0.05). The feed intake showed similar pattern regardless of the bacterial phytase and calcium levels in the diet. However, the treatment groups fed diets containing NPP level of 0.275% and 0.165% showed significantly higher feed intake than the group fed with 0.095% NPP (P<0.05). Although the feed conversion was not affected by calcium and NPP levels in the diet, the most improved result was obtained from 300 DPU phytase added group (P<0.05). The eggshell breaking strength and thickness increased as dietary calcium level increase the level of calcium increases in diet. The treatment groups fed diet containing 0.275% and 0.165% NPP revealed to show improvement in eggshell breaking strength and yolk color index compared to the NPP non added (0.095% NPP) treatment group. The result of the present study suggests that the appropriate level of microbial phytase is 300 DPU and at this level, tricalciumphosphate supplementation in feed can be reduced to 40% of NRC recommendation. Higher calcium level in feed fail to show synergistic effect by adding microbial phytase.
Park, Do-Yeun;Park, Joong-Kook;Cho, Sung-Back;Kim, Chang-Hyun
Journal of The Korean Society of Grassland and Forage Science
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v.30
no.2
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pp.179-190
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2010
The experiment was conducted to observe the effects of dried whole crop barley treated with cellulolytic microorganisms (Aspergillus niger KCCM 60357 and Bacillus licheniformis KCCM 40934) on the chemical composition, in vitro colonic fermentation and whole tract digestibility in swine. Whole crop barley were fermented with no microorganism addition (control), A. niger, B. licheniformis and co-culture of A. niger and B. licheniformis (Mixture) for 3 days at $30^{\circ}C$. In the feed chemical composition, CP contents of whole crop barley treated with A. niger (7.52%) and B. licheniformis (7.77%) were significantly higher than control (6.81%) (p<0.05). The in vitro colonic fermentation of dried whole crop barley fermented with control showed significantly higher $CH_4$ contents than A. niger, B. licheniformis and Mixture at 18h incubation (p<0.05). Dry matter (DM) digestibilities of A. niger (55%) and Mixture (57.42%) treatments were significantly higher than control (43.74%) (p<0.05). Ammonia-N was significantly increased in A. niger, B. licheniformis and Mixture relative to control at 24 hour incubation (p<0.05). Xylanase activities in A. niger, B. licheniformis and Mixture treatments were significantly higher than control at 24 hour incubation (p<0.05). Concentrations of total VFA were significantly increased in B. licheniformis (12.61 mM) at 24hour incubation (p<0.05). In vitro whole tract digestibility was significantly increased in B. licheniformis (49.61%) compared with the control (45.65%) (p<0.05). In conclusion, whole crop barley treated with cellulolytic microorganisms improved whole tract digestibility and colonic fermentation for swine.
Kim, Jong Geun;Park, Hyung Soo;Lee, Sang Hoon;Jung, Jeong Sung;Ko, Han Jong
Journal of The Korean Society of Grassland and Forage Science
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v.35
no.2
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pp.87-92
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2015
This experiment was conducted to evaluate the effect of seeding methods and application levels of nitrogen fertilizer on the yield and forage quality of whole crop rice (WCR). The WCR variety "Namil" was directly seeded on April 25 and transplanted on May 25. Five levels of nitrogen fertilizer were applied (90, 110, 140, 170 and 200 kg/ha). There were no significant differences (p<0.05) of the emergence date, heading date and disease resistance based on the nitrogen fertilizer rates; however, the WCR became dark at higher nitrogen fertilizer rates. The plant height increased at higher nitrogen fertilizer rates and the tiller number showed the same trend. In contrast to a direct seeding method, transplanting increased the tiller number. The dry matter (DM) content did not show a certain tendency based on nitrogen fertilizer rates, while the fresh and dry matter yields increased with incremental changes of the nitrogen fertilizer rates (p<0.01), and the transplant method increased the yield size. In yield analysis, the plot direct-seeded with 140 kg N/ha and the transplanting with 170kg N/ha showed the highest yields. The crude protein (CP) content increased with higher nitrogen fertilizer rate, but there was no significant differences between transplant and direct-seeding methods. The content of ADF (acid detergent fiber) and NDF (neutral detergent fiber) increased with higher nitrogen fertilizer rate, but total digestible nutrient (TDN) content decreased with increased nitrogen levels. Although high nitrogen applications increased the fresh and DM yields, the 140 kg/ha nitrogen fertilizer level is recommended as the proper nitrogen fertilizer level, considering both yield and the environments.
Park, Hyung-Soo;Hwang, Kyung-Jun;Park, Nam-Geon;Choi, Gi-Jun;Lee, Jong-Kyung;Cheon, Dong-Won;Ko, Moon-Suck
Journal of The Korean Society of Grassland and Forage Science
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v.28
no.3
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pp.215-220
/
2008
This experiment was conducted to compare forage production and feed value of winter forage crops at the experimental field of Livestock Division, National Institute of Subtropical Agriculture from 2007 to 2008. The experiment was arranged in a randomized block design with three replications. The five winter forage crops used in this experiment were barely ('Youngyang' and 'Yuyeon'), oats ('Samhan' and 'Swan'), wheat ('Kumkang' and 'Woori'), triticale ('Shinyoung') and italian ryegrass ('Hwasan 101' and 'Florida-80'). The species having the fastest heading date was wheat (5th April) while the heading date of oats ('Samhan') was the latest as 28th April. The dry matter (DM) content of wheat was the highest among the five winter forage crops. Italian ryegrass ('Hwasan 101') showed the highest CP content by 11.2% and oats (Swan) showed the lowest content by 9.8%. Average acid detergent fiber (ADF) and neutral detergent fiber (NDF) content were 28.6 and 50.8% respectively. The five winter forage crops have narrow range of total nutrient digestibility (TDN) from 64.0% to 69.1%. Italian ryegrass ('Hwasan 101') showed the highest DM yield by 25,951 kg/ha, but the DM yield of barely and wheat low by 13,892 kg/ha ('Yuyeon') and 14,815 kg/ha ('Woori'), respectively. Italian ryegrass and oats have higher forage yield and feed value in Jeju. Also, oats has high grain and forage yield. The results demonstrated oats can cultivate as alternative winter forage crop for whole crop silage barely in Jeju.
Jeon, Kyeongman;Chung, Man Pyo;Shin, Sung-Chul;Yu, Chang Min;Koh, Won-Jung;Suh, Gee Young;Kim, Hojoong;Kwon, O Jung;Kim, Tae Sung;Lee, Kyung Soo;Han, Joungho
Tuberculosis and Respiratory Diseases
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v.55
no.2
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pp.175-187
/
2003
Background : Although corticosteroid and cytotoxic agent such as cyclophosphamide have been used for the treatment idiopathic interstitial pneumonia (IIP), efficacy of these toxic drugs are unclear because previous reports included the patients who did not undergo surgical lung biopsy and none evaluated the response according to histopathologic entities of IIP. To answer this, we retrospectively analyzed the treatment response and side effects of corticosteroids and cyclophosphamide therapy in patients with idiopathic UIP and NSIP. Methods : Among 61 patients with UIP and 26 patients with NSIP diagnosed by surgical lung biopsy at Samsung Medical Center from July 1996 to June 2002, those who received corticosteroid or cyclophosphamide therapy for at least 6 months and were followed for at least one year after the initiation of treatment were enrolled (32 UIP, 23 NSIP). Treatment response of 55 patients was assessed by ATS response criteria (clinical symptoms, pulmonary function test and radiological findings). Adverse reactions to either agent (42 cases of cyclophosphamide${\pm}$low-dose prednisolone, 49 cases of prednisolone alone) were also analyzed. Results : Irrespective of treatment regimen, NSIP showed more favorable response than UIP (6 months: 78.3% vs. 9.4%, 12 months: 69.6% vs. 9.4%, p<0.001). Cyclophosphamide showed comparable response to corticosteroid in NSIP while its efficacy was as poor as those of corticosteroid therapy in UIP. Significant adverse reaction to drug more frequently occurred in corticosteroid group (35.7%) than cyclophosphamide group (14.3%) (p=0.017). Conclusion : Cyclophosphamide is effective and more tolerable than corticosteroids in the treatment of idiopathic nonspecific interstitial pneumonia.
Leaf samples and bulbs showing characteristic symptoms of virus infection were collected from Gang-won, Chung-nam, and Jeju Province of Korea in 2008-2009. Three viruses, Lily symptomless virus (LSV), Lily mottle virus (LMoV), and Cucumber mosaic virus (CMV) were detected by RT-PCR. Virus-infected plant samples were identified; 12 plants with LSV, 20 plants with LMoV, and 1 plant with CMV. Of the twelve LSV infected samples, seven samples were found to be mix-infected with LMoV and LSV. Symptoms of LMoV and LSV mixed infection were fairly severe, like as vein clearing, leaf curling, leaf mottling, leaf mosaic, and yellow streaking. Mixed infection with LMoV and LSV was also found in lily bulbs which have been stored under unfavorable environmental conditions. LMoV predominated in our tests, whereas spread of Lilyvirus X (LVX) was not found. The nucleotide sequences of coat protein (CP) region of seven isolates (4 LMoV, 2 LSV, and 1 CMV) were compared with the corresponding regions of LMoV (AJ564636), LSV (AJ516059) and CMV(AJ296154). The nucleotide sequence homologies between reference viruses and seven isolates were 95-99%. Complete sequencing of seven isolates is necessary to obtain more information on the molecular characteristics of these viruses as well as to increase sensitivity and rapidity of viral detection.
This study was conducted to investigate the effects of application of composted cattle manure (CCM) on the productivity of the whole crop rice (WCR) and Italian ryegrass (IRG) on both Sancheong and Asan area from 2005 to 2008. Application levels of CCM such as chemical fertilizer (CF), CCM 150% and CCM 200% were tested in paddy field. Amount of CCM was adjusted equal to total nitrogen value relative to its value of CF. Mean dry matter yield (DMY) of WCR and IRG increased in order; CCM 200% > CF > CCM 150% in Asan and there was no significant difference between CCM 200% and CF. In Sancheong, DMYs of WCR and IRG significantly decreased (p<0.05) in order CF > CCM 200% > CCM 150%. The plant length and number of tiller of WCR were not different among treatments, however the percentage of ripeness of WCR was higher (p<0.05) in CF compared to CCM 150% and CCM 200%. Also, there were no differences in NDF and ADF contents, however CP content was higher (p<0.05) in CF treatment compared to CCM 150% and CCM 200%. Based on the results of this experiment, IRG-WCR double cropping system with application of CCM may be effective in producing the forage resources of 18~20 tons every year with eco-friendly way.
Park, Chang-Kyu;Tu, Qi;Cho, Ju-Hyun;Yu, Kwang-Won;Jeong, Heon-Sang;Lee, Hyeon-Yong;Jeong, Jae-Hyun
Korean Journal of Food Science and Technology
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v.42
no.1
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pp.82-89
/
2010
To obtain functional materials from a submerged culture of Hericium erinaceum, a suitable basal medium for flask culture was screened and the optimal culture conditions in a jar fermenter were investigated with the addition of ginseng extracts (GE) to the basal liquid medium. Of all tested basal liquid media, the mushroom complete medium (MCM) supplemented with 0.5% of GE produced the highest mycelial dry weight (MDW) of 5.91 g/L in the flask, which reached a plateau at $25^{\circ}C$, pH 5.5 after 10 days. The submerged culture conditions for the mass production of mycelia in a 50 L jar fermenter were also optimal at $25^{\circ}C$, pH 5.5, 120 rpm agitation speed and 0.4 vvm aeration rate. Under these conditions, the maximum MDW was produced, which reached a value of 4.28 g/L within 5 days. When we investigated the effects of the amount of GE in the MCM on the production of MDW in the jar fermenter, the addition of 5% GE (HE-GE-5) under the optimal culture conditions produced the maximum MDW (4.93 g/L). In addition, the crude polysaccharide of HE-GE-5 contained mainly neutral sugars (63.2%) with considerable amounts of uronic acid (19.3%) and a small amount of proteins (8.8%) and it had potent immunostimulation properties.
Journal of The Korean Society of Grassland and Forage Science
/
v.24
no.3
/
pp.225-230
/
2004
Jeju native sorghums were grown with six different planting densities ($5{\times}5cm,\;10{\times}10cm,\;15{\times}15cm,\;20{\times}20cm,\;25{\times}25cm\;and\;30{\times}30cm$) from April 3 to September 6 in 2000 in Jeju island to determine the influence to growth, yield and feed value by the planting densities. Days to heading were delayed from 66 days to 69 days as increasing of plant density. Plant height was 195.1cm at $30{\times}30cm$ plot, whereas that was 216.5cm at $10{\times}10cm$ plot, indicating that the plant was higher by the decrease of the planting density. As plant density increased, the number of leaves and steam diameter were decreased. Fresh forage yield increased from 25.4 to 61.3 MT/ha, dry matter (DM) yield from 5.8 to 16.5 MT/ha, crude protein (CP) yield from 0.4 to 1.5 MT/ha and total digestible nutrients (TDN) yield from 2.7 to 8.8 MT/ha as planting density from $30{\times}30cm\;to\;10{\times}10cm$ plot. Crude protein content increased from 7.0 to $9.0\%$, ether extract content from 1.7 to $4.4\%$, nitrogen free extract content from 36.9 to $38.4\%$ and TDN content from 46.1 to $55.5\%$ as planting density was decreased. whereas crude fiber content decreased from 43.9 to $37.1\%$ and crude ash content from 8.4 to $6.8\%$.
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