Milk Yield


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Milk Yield

 

the amount of milk, in kilograms or liters, obtained from agricultural animals, mainly cows, sheep, and mares, during a specified period, for example, a given milking, a day, a month, a period of lactation, or the animal’s entire life. The size of milk yield depends on the type of animal, the animal’s breed, age, individual features, and period of lactation, and the conditions under which it is fed and cared for. The highest milk yields are from cows of specialized dairy breeds. As the animal grows older, its milk yields increase until the sixth or seventh lactation and then decrease. Milk yield increases in the first 1½ to two months after calving and gradually decreases after the third month. Increase in the animal’s weight to the optimum for the breed is accompanied by an increase in milk yield. Milk yield increases if the animal is milked three or four times a day; however, this entails a greater expenditure of labor.

References in periodicals archive ?
Using the RRM that best fit the data, identified by the comparison criteria described above, genetic parameters were obtained for nine measures of persistency in milk yield (PSO (Table 2) and milk yield up to 305 DIM, as well as the genetic and permanent environmental correlations between these persistency measures and between these measures and 305MY.
In temperate zones milk yield of Holstein was touching the figure of 10 tons but under tropics and subtropics the average production was 3 to 4 tons.
Correlations and different types of regression of milk yield and body measurement were shown in table (4).
The scientists observed that many of the genes and chromosome regions associated with milk yield were also related to lowered fertility rate, supporting their hypothesis of a genetic link between the two traits.
Before analyses composite samples were obtained by mixing quarter morning and evening samples in proportion to the milk yield at each milking.
Increased frequency of milking is beneficial to milk yield and composition, in addition to labor reduction, and milk nursing.
Data for this study consisted of TD milk yield records of first-lactation Holstein Friesian cows that calved from 1997 to 2013 and belonged to two different herds.
The impact of increased milk yield per day per animal to approximately one liter by adoption of best farm practices has been witnessed.
The report by the European Food Safety Authority found that genetic selection for milk yield was the major cause of poor welfare among dairy cows.
Within days of introducing the stabilised yeast to the diet, a milk yield increase was recorded," said Dr Michael Rose, of the animal science department.