Aiming at the determination of the metabolic disorder prevalence as well as the effect of subclinical disorders on daily milk traits of Holsteins, over 1 million (1 962 831) test day records were analysed. The metabolic disorder (ketosis or acidosis) prevalence was indicated by the fat-to-protein (F/P ) ratio, while subclinical disorder was indicated by the F/P ratio and cows’ daily production....

Over the last years, healthy food has gained interest among consumers, especially with regard to the fat content of livestock products which has been associated to the risk of cardiovascular diseases. Individual milk samples (n = 12,624) of 2,977 Holstein-Friesian (HF), Brown Swiss (BS) and Simmental (SI) cows from 39 multibreed herds were analyzed for fat content, protein content, casein conte...

Some dairy farmers opt to omit one milking, either incidentally or weekly, without changing other milking times. This practice entails an extended milking interval of 24h (24h-MI), which is associated with a decrease in milk yield. This decrease varies among cows and could be partly due to factors such as stage of lactation and milk yield level. The aim of this study was to describe the average...

The aim of this study was to investigate the effect herd management practices on milk quality according somatic cell count, standard plate count and electrical conductivity. experimental work carried out at El-Bayoumi dairy farms in Gamasa, Dakahlia Governorate 2016. Managing cows parity, cleanliness score, stocking rate, feeding regime, stage lactation, daily level milking shift had a higher s...

The aim of this study was to estimate allelic and genotypic frequencies of five DNA markers that are positional and functional candidates for milk production traits in Czech Fleckvieh cattle. In addition, we evaluated the association of these markers with milk production traits and breeding values for milk production traits and also estimated linkage disequilibrium (LD) between two markers with...

I n an earlier publication (Rook & Line, 1961) it was suggested that the increases in the yield and solids-not-fat (s.N.F.) content of milk that occur in response to an improvement in the plane of energy nutrition of the cow are due to increases in the ruminal production of acetic and propionic acids. Evidence was given supporting the view that the acids differ in their effects on the synthesis...

The study was conducted to estimate the genetic and phenotypic correlations among body measurements, body weight, kidding interval, kidding rate and milk yield in the different breeds of goat. Data was collected on 95 goats of three breeds (Jamunapari, Black Bengal and their crosses (Jamunapari×Black Bengal) through direct observation. The average body weight of Jamunapari goat was 34.75 ± 3.33...

Herd differences in value of milk for fluid use, nonfat dry milk, and Cheddar, Swiss, Mozzarella, and cottage cheeses were determined. Data were 1988 herd average fecords from the National Cooperative Dairy Herd Improvement Program that included milk, fat, and protein yields from 50,608 herds (3.8 million cows) that produced 28.8 billion kg of milk Values of annual yield were calculated both on...

Abstract The aim of this research communication was to examine the effect dietary supplementation with wheat-based dried distillers’ grains solubles (DDGS), a by-product bioethanol production, on yield, composition, and fatty acid (FA) profile ewe milk. Forty-five purebred mid-lactating Chios ewes (average milk yield 2.23 kg/d in 96 ± 5 d lactation) were offered three iso-nitrogenous iso-energe...

The raw milk quality has increasing importance for producer and consumer as it is directly related to processing, production and price. The aim of present study was to determine the relationship among intramammary infection (IMI) and raw milk parameters in Jersey crossbred cows. Total 24 lactating Jersey crossbred cows were randomly selected and representative animal wise morning milk samples w...