• Journal of The Korean Society of Grassland and Forage Science
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• v.44 no.2
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• pp.106-112
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• 2024

The objective of this study was to compare the feeding effects of imported timothy hay, domestic Italian ryegrass silage (IRGS) and IRG dried by hot-air dry system (IRGHDS) under basic total mixed ration (bTMR) on rumination activity, milk production, and milk composition in lactating dairy cows. Eighteen Holstein dairy cows were divided into three groups: control (bTMR + imported timothy hay), treatment 1 (bTMR + IRGS) and treatment 2 (TMR + IRGHDS) groups. The study was conducted over a total period of 24 days, including a 10 days adaptation period and a 14 days main experimental period. The results indicate body weight was not significantly different between the three groups (p>0.05), and rumination time was significantly higher in the treatment 1 group compared with the control group (p<0.001). Milk fat, protein, and lactose were not significantly different between the three groups (p>0.05), however, somatic cell counts were significantly lower in the treatment 1 group compared with the control group (p<0.001). As a result of the economic feasibility analysis, it is expected that feeding TMR using IRGS and IRGHDS will increase profit by 402.8 won/day and 331.4 won/day per cow compared to imported timothy hay. Therefore, IRGS and IRGHDS can be used as substitutes for imported timothy hay in feeding lactating dairy cows.

• Proceedings of the KSRS Conference
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• v.1
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• pp.130-133
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• 2006

Three scatterometers will be launched by Europe, India, and China in the next few years and they will fly in tandem with QuikSCAT of the United States. The potential improvement in coverage will open up new operational and research applications.

• Proceedings of the Korean Society of Life Science Conference
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• 2007.10a
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• pp.24.1-24.1
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• 2007

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• Journal of the Korean Mathematical Society
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• v.38 no.2
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• pp.409-420
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• 2001

In this paper we establish a Fubini theorem for various analytic Wiener and Feynman integrals. We then proceed to obtain several integration formulas as corollaries.

• Asian Journal for Public Opinion Research
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• v.8 no.1
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• pp.59-64
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• 2020

• Korean Circulation Journal
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• v.54 no.7
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• pp.425-426
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• 2024

• Asian-Australasian Journal of Animal Sciences
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• v.12 no.5
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• pp.752-757
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• 1999

Studies were made of digestion of timothy (Pheleum pretense) hay, tall fescue (Festuca elatior) hay, and rice (Oryza sativa) straw in pure cultures of rumen anaerobic fungus, Neocallimastix frontails MCH3. The fungus was inoculated on ground forages (1%, w/v) in an anaerobic medium and incubated at $39^{\circ}C$. Incubation was continued for 24, 48, 72 and 96 h. The losses of dry matter, xylose and glucose of forage during incubation were determined at the end of these incubation periods. Xylose and glucose were considered to be released from xylan and cellulose, respectively. The digested xylan to digested cellulose (X/C) ratios of the substrate were calculated. Xylanase and carboxymethyl cellulose (CMCase) of culture supernatant and residual substrate was measured at the same time. The X/C ratios in the cultures on timothy hay and rice straw were greater than 0.5 in the first 24-h incubation period. The values were smaller than 0.3 in tall fesque. The ratio of xylanase activity to that of CMCase in the first 24-h incubation period correlated well with the traits in X/C ratio. However xylanase activity was still superior to CMCase in the following incubation period (48 to 96 h), although the glucose (designated as cellulose) was more intensively digested than xylose (designated as xylan). The production of these polysaccharidases appeared to correlate with substrate cell-wall sugar composition, xylose to glucose ratios, at the beginning of fast growing period.

• Journal of Animal Science and Technology
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• v.59 no.3
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• pp.6.1-6.6
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• 2017

Background: This study was aim to observe the effects of feeding mixed local hay (MH) consisted of 55% orchard grass (Dactylis glomerata L.), 35% tall fescue (Festuca arundinacea) and 10% red clover (Trifolium pratense) to Hanwoo steers on performance, carcass characteristics and meat quality (longissimus thoracis) compared with feeding imported timothy hay (TH) and local rice straw (RS). Results: Although no significant effects were found on animal performance and carcass yield grade, the carcasses of MH group had higher marbling score and quality grade than those of RS and TH group (P < 0.05). Therefore, higher fat content (P < 0.001), lower shear force and hardness value in the beef of MH group than that of other groups were observed. Furthermore, the beef of MH group had higher CIE $a^*$ value (redness) than that of other groups and feeding MH to Hanwoo steers lowered n-6 to n-3 fatty acids ratio in beef. Conclusions: Mixed hay provided benefits on meat quality and could be used for Hanwoo fattening program.

• Asian-Australasian Journal of Animal Sciences
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• v.15 no.11
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• pp.1564-1567
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• 2002

Influence of dietary sesame meal on plasma glucose, non-esterified fatty acid (NEFA), triglyceride, total cholesterol, high-density lipoprotein (HDL)-cholesterol and urea concentrations in goats was examined. Goats were fed a control diet (50% timothy hay and 50% concentrates) (CD) or a sesame meal diet (50% timothy hay, 25% concentrates and 25% sesame meal) (SMD) during 12 days. Blood samples were taken after overnight fasting and afternoon every day. Body weight was not changed by feeding either CD or SMD. The concentrations of plasma triglyceride and urea were higher (p<0.05) in goats fed SMD than those fed CD. Plasma NEFA concentration was higher in plasma samples after overnight fasting. Plasma glucose concentration in plasma samples collected afternoon was higher than those after overnight fasting. Plasma total cholesterol concentration was significantly increased by feeding SMD but not by feeding CD, which was due to the remarkable increase of plasma HDL-cholesterol concentration. In conclusion, dietary sesame meal brought about an increase in plasma total cholesterol concentration accompanied with an increment in plasma HDL-cholesterol consentration in goats.

• Journal of The Korean Society of Grassland and Forage Science
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• v.11 no.4
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• pp.236-243
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• 1991

A field experiment was conducted during the growing season of 1985 to determine the effects of slope orientation, north and south facing exposures and three different altitudes, 800, 1,000 and 1,200m a.s.1. on the dry matter yield, forage quality and botanical composition of alpine pasture. 1. Total dry matter yield of alpine pasture was influenced by slope orientation and altitude. An average forage yield of both exposures at 1,000m a.s.1. was 9,301kg/ha compared with 10,274kg/ha at 800m a.s.1. and the productivity express in relative percentage decreased by 9.5% per 200m attitudinal increase. 2. An average forage yield of both altitudes, 800 and 1,000m a.s.1. on the south facing exposure was 21.5% higher than that on the north exposure. 3. Crude protein concentration of forage grown on both exposures was lowest at 800m a.s.1. increasing gradually as the altitude increased, but crude fiber concentration decreaced in a manner opposite to that of crude protein. 4. Forage grown on the north facing exposure had a higher concentration of crude protein than that grown on the south facing exposure at the same altitude, but lower concentraion of crude fiber. 5. Orchardgrass and timothy were two main species on both exposures at 800m a.s.1. but timothy was only dominant species at 1,000 and 1,200m a.s.1. and performed well up to 1,200m a.s.1. in alpine area. The economic production limit of orchardgrass would be about 800m a.s.1. in the alpine pasture. 6. No soil property differences were found between the north and south facing exposures as well as three different altitudes in the alpine pasture. It seemed that the previous pasture fertilization of the experimental field completely overshadowed any soil property differences from slope orientation and altitude.