Objective The aim of the current study was to describe relationship between milk yield and lactation number, stage, length milking frequency in Korean Holstein dairy cows using an automatic system (AMS). Methods original data set consisted observations from April October 2016 780 cows, with a total 10,751 milkings. Each time cow milked by AMS during 24 h, management recorded identification numbers unit, being milking, date (kg) as measured meters installed on each lactation, (NoM). Lactation...

The objective of this study was to investigate the calf death and analyse causes mortality by based on medical records autopsy findings during 10 years in a large dairy farm.Total 1,361 born 146 dead invested period.Mortality rate 10.7% showed big difference year-specific from 2.8% (4 calves) 19.2% (28 calves).The highest 1 week age (18.5%, 27 followed 2 (11.6%, 17 more old tended be reduced.The less than 4 weeks 8 entire accounted for 41.1% (60/146 70.0%(102/146 calves), respectively.Causes...

This study compared the performance of female Holstein calves fed either whole milk (WM) or replacer (MR) having similar gross composition to WM. Calves (n = 20) were separated from their mothers within 2 h birth, weighed, moved into individual pens, and colostrum (10% BW over feedings daily) for first 3 d. alternately assigned WM 10) MR using mobile plastic bottles. At each feeding, diluted was prepared in buckets by mixing 0.143 kg powder (as-is basis) 1 L lukewarm water. on both...

Recently, Jersey cattle was introduced and produced by embryo transfer to Korea. This study conducted investigate the differences of milk compositions between Holstein cows relationship days in (DIM) during early lactation. Data were collected from twelve lactating Department Animal Resources Development at National Institute Science. Cows parity 1 used, calved spring April March 2017. All housed two sections within a free-stall barn, which divided into six each breed, received basal total...

Objective: In this study we investigated the effect of seasonal thermal stress on milk production and compositions between Holstein Jersey dairy cows under temperateclimate in Korea.Methods: A total 9 lactating (2.0±0.11 parity) which had a daily yield 29.77±0.45 kg, days 111.2±10.29 were selected similarly at beginning experiments each season. Also, (1.7±0.12 20.01±0.43 114.0±9.74 experiments.Results: Results showed that average ambient temperature (°C) temperature-humidity index (THI)...

We evaluated the effects of heat stress on physiological responses and milk production in Holstein Jersey cows reared Korea. The mean average temperature-humidity index (THI) increased significantly from May to August then decreased until October. rectal temperature (RT) was compared with cows, as THI values 61 85. respiratory rate (RR) when value surface rumen udder higher than No significant difference noted respect relative serum volumes between breeds ranges, but we measured changes pH...

In this study, we prepared stabilized vitamin A and C nanoemulsions, investigated their efficacy on milk-specific proteins in bovine mammary epithelial cells (MAC-T). Emulsions of (vit-A) (vit-C) were using Lipoid S 75 microfluidization. The particle size polydispersity index (PDI) nanoemulsified vit-A vit-C studied. cytotoxic effect nanoemulsion-free was determined by an MTT assay. addition, the vitro expression pattern MAC-T quantitative RT-PCR. results showed that efficacies nanoemulsions...

This study was conducted to compare the effects of feeding high protein and low energy milk replacer (HPR; CP 25%, ME 3.6 Mcal/kg DM) with 21%, 4.2 on feed consumption, body weight (BW) gain, health selected blood metabolites in Holstein calves during pre-weaning period.At each feeding, (MR) prepared by mixing 0.125 kg dry MR 1L warm (60°C) water.The were fed either HPR (n = 10) or HER using mobile plastic bottles fitted soft rubber nipples.All received 1.8L diluted at 3 times daily first 4...

N-acetyl-β-d-glucosamine (GlcNAc)6 is extensively used as an important bio-agent and a functional food additive. The traditional chemical process for GlcNAc production has some problems such high cost, low yield, acidic pollution. Therefore, to discover novel chitinase that suitable bioconversion of chitin would be great value.Here, we describe the complete isolation characterization exo-chitinase from Acinetobacter parvus HANDI 309 conversion chitin. identified mainly produced...

Objective The use of locally produced forage (LPF) in cattle production has economic and environmental advantages over imported forage. objective this study was to characterize the nutritional value LPF commonly used Korea. Differences ruminal fermentation characteristics were also examined for species from two major regions: Chungcheong Jeolla. Methods Ten (five each regions) six most widely forages originating North America obtained at least three times throughout a year. Each pooled...

Influence of different levels corn steep liquor (CSL) on chemical composition urea treated wheat straw (UTWS), ruminal characteristics, digestion kinetics, nitrogen (N) utilization, and nutrient digestibility by ruminally-cannulated buffalo bulls was studied in a 4×4 Latin Square Design. The CSL used to ensile 5% UTWS at the rate 0, 3, 6, 9% dry matter (DM) basis. Total N neutral detergent fibre (NDF) were increased with increasing level CSL. Increased NDF content attributable insoluble...

Objective Burial is associated with environmental effects such as the contamination of ground or surface water biological materials generated during decomposition process. Therefore, bacterial communities in leachates originating from decomposing bovine carcasses were investigated. Methods To understand process (Hanwoo) carcass decomposition, we simulated burial using a lab-scale reactor volume 5.15 m3. Leachate samples 3 collected peristaltic pump once month for period 5 months, and...

The objectives of this study were thus to identify most significant factors that determine milk component yield (MCY) using a meta-analysis and, if possible, develop equations predict MCY variables can be easily measured in the field. A literature database was constructed based on research articles published Journal Dairy Science from Oct., 2007 till May, 2010. consisted total 442 observed means for 118 studies. candidate those which routinely field (e.g. DMI, BW, dietary forage content,...

Thirty early lactating Nili-Ravi buffaloes, six animals in each group, were used a completely randomized design to examine the feeding value of 4% urea treated wheat straw (UTWS) ensiled with 6% or without acidified molasses.Five experimental diets formulated.The control ration was balanced contain 30% DM from UTWS molasses.The other four formulated have 30, 40, 50 and 60% molasses, respectively.Dry matter neutral detergent fiber (NDF) intakes higher buffaloes fed containing molasses...

The purpose of this study was to determine the effects photoperiod and light intensity on milk production, composition, hormones levels blood metabolites indices Korean Holstein dairy cows in automatic milking system (AMS). A total 24 were selected used four subsequent treatments for experimental periods 60 days. programs consisted (1) Control: natural with 14.2 h period 9.4 dark (below 10 Lux); (2) T1: 16 long day (LDPP) 50 Lux light; (3) T2: LDPP 100 (4) T3: 200 light, respectively....

This study was conducted to investigate the effects of replacing whole crop corn silage (WCCS) with rice (WCRS) in total mixed ration (TMR) on nutrient intake, milk yield and its composition Holstein cows.The Chucheong variety (Oryza sativa L. Japonica) (Pioneer 32 P75) were harvested at yellow-ripe stage ensiled round bales trench silos, respectively.Two TMR containing either WCCS or WCRS prepared.These diets randomly assigned 16 midlactating cows (8 per treatment) fed for 120 days.The...

In this study, Saccharomyces cerevisiae culture fluid (SCCF) has been added to a diet of lactating dairy cows attempt improve the ruminal fermentation and potentially increase dry matter intake (DMI) milk yield. This study was conducted investigate effects SCCF on yield blood biochemistry in during summer. Twenty-four Holstein were randomly assigned one four treatments: (1) total mixed ration (TMR-1) (Control); (2) TMR-1 supplemented with (T1); (3) TMR-2 (containing alfalfa hay) (T2); (4)...