Chemical composition of milk in crossbred cows and its relationship with meeting nutritional requirements
DOI:
https://doi.org/10.59169/pentaciencias.v7i3.1528Keywords:
Milk composition; Bovine lactation; Energy deficiencyAbstract
This study examined the chemical composition of milk from mixed-breed cows during lactation and its alignment with the NRC (2001) nutritional standards. We measured protein, fat, and lactose levels while accounting for each cow’s weight, milk yield, and lactation stage. Thirty cows were divided into three groups, and over three months we collected monthly samples, which were analyzed using an ultrasound LACTOSCAN S® system. By applying interpolation formulas, we estimated requirements for energy (NDT), protein, calcium, and phosphorus for both maintenance and production. Results showed protein peaking in the final lactation third at 2.90%, meeting minimum standards, while lactose remained stable between 4.32% and 4.39%, within the optimal range. However, fat content was consistently low, indicating an energy shortfall in the diet. Guided by these findings, we formulated stage-specific feeding plans to boost energy intake without compromising other nutrients. This precision approach enhances daily nutritional management. In conclusion, although protein and lactose levels reflect adequate nutritional status, the persistently low fat percentages underscore the need to reinforce dietary energy.
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